DE1282443B - Portable sound film projector with retractable cassette - Google Patents

Description

Portable sound film projector with retractable cassette The invention relates to a portable sound film projector with a retractable cassette.

In a known sound film projection device with a screen built into the housing, the cassette is inserted perpendicular to the image plane. A deflection mirror of the optical system, which is located in the device in the insertion area of the scanning part of the film, is moved out of the cassette as a function of the insertion movement and, after the scanning part has passed the mirror, is moved back into the working position. The light rays coming from an illuminating magnifier arranged in the interior of the housing are thrown via the deflecting mirror through the film and through the objective, the axis of which is perpendicular to the plane of the film. The light rays emerging from the lens are then projected onto the screen via a system of deflecting mirrors.

In an interchangeable film playback cassette, which has become known, for fully automatic sound film playback controlled by a selection device, the cassette is divided into an insert part with an endless film reel for playback in any position. In this known apparatus the cassette is selectively moved so objectively before an Obwalden whose axis is perpendicular to the Fümebene that the redirected via a prism light beams by the image window, the film and the Obwalden pass objectively.

The object of the invention is to provide a sound film projector of the type mentioned at the outset, which is very flat like a suitcase is.

To solve this problem, the invention provides that the axes of the lens, the diaphragm, the sound roller and the drive roller are parallel to one another and that the film plane is rotated by 900.

Further features and advantages of the sound film projector according to the invention emerge from the following exemplary description of an embodiment with reference to the drawing; in this FIG. 1 is a perspective view of the sound film projector with a collapsible screen structure in the projection position, in which the cassette is partially inserted into the projector, FIG. FIG. 2 is a perspective view similar to FIG. 1, in which the screen is partially folded back to collapse the box-like screen structure, FIG . 3 is a perspective view similar to FIG. 2, in which the screen is shown in the rest position and one of the side shields partially folded back, FIG. 4 is a perspective view of the folded screen structure in the rest position, FIG. 5 a, bottom plan view of the sound movie projector, broken away in part to represent details of the internal devices, F i g. 6 is a top plan view with parts broken away to show the features of FIG . 5 to show the devices shown seen from above, F i g. 7 is a vertical sectional view of the sound film projector taken substantially along line 7-7 of FIG . 1, seen in arrow direction, in which the box is open and the screen is shown in the projection position, FIG. 8 is a sectional view on an enlarged scale with parts broken away substantially along line 8-8 of FIG . 5 and 6, in which the cassette in the cassette receiving chamber of the projector and the projector devices are shown in the stop position, FIG . 9 is a sectional view similar to FIG. 8, in which the cassette is shown in the cassette receiving chamber of the projector, but the projector devices are shown in the running position, FIG . 10 is a partially broken plan view of the cassette of the invention in which the loopers are shown in their operating position and the pinch roller lever in the retracted position, Fig. 11 is an exploded perspective view of the film gate in which a short piece of film in position for passage through the is shown by the Fümfenster-formed guide track, F i g. 12 is a top plan view of the film window, FIG . 13 is a broken-away sectional view on an enlarged scale taken substantially along line 14-14 of FIG . 10, which shows the devices for aligning the film window with respect to the optical structure in dependence on the insertion of the cassette into the cassette receiving chamber of the projector, - FIG. 14 is a broken sectional view taken along line 14-14 of FIG . 10, in which the cassette is shown in the operative position, FIG. 15 is a schematic view of the projector devices and their control in the stop position, and FIG . 16 is a schematic view similar to FIG. 15, in which the projector devices are shown in the running position.

In the drawing, the sound film projector 20 of the present invention includes a support housing 22 having a base 24 and a cover 26 . The base 24 takes the film-containing cassette and the projector means, which werden- explained in greater detail later in the cover 26 together a hinged screen assembly 28 is housed. To describe desTragkastens 22 and the foldaway screen structure 28 is on the F i g. 1 to 4 and 7 are referred to. - - According to Fig. 1 is the base 24 of the support box 22 -with front and rear walls 30, 32, side-walls 34, 36 and upper and lower walls 38 , 40, 40 provided. The lid 26 is pivotable on the upper edge. hinged to the rear wall of the base by hinges 42 for movement between a closed position covering the top wall 38 of the base 24 and an open position extending substantially at right angles to the top wall 38 , as in FIG ig. 1 is indicated. The projector assemblies are mounted within the base 24 and include image projection optics which project an upwardly directed beam of light that extends through and substantially at right angles to the top wall 38 , as generally shown in FIG. 7 is indicated by the diverging light rays R. The front edge of the hinged cover 26 and the front wall 30 of the base 24 are provided with conventional locks such as those used on briefcases or suitcases, and the front wall 30 is provided with a handle 44. - The collapsible Bildschirmau'fbau 28 - is normally housed within the cover 26 when the latter is in the closed position in which it overlies the base 36th The folded position of the screen structure 28 is shown in FIG. 4 shown. The screen structure 28 is shown in FIG. 1 shown upright position can be extended, w obei the lid 26 is in the open position. This happens in the sequence that is shown in FIGS. 4 to 1 are shown. Conversely, the screen structure 28 can be folded into the rest position shown in FIG. 4, as is shown successively in FIGS. 1 to 4. The screen structure has a support part 46 which is pivotably articulated on the cover 26 by means of the hinges 48 (see FIG. 7) . The pivot point is at a distance from and parallel to the lid pivot point, which is formed by the hinges 42. The support member 46 is pivotable between the upright position substantially parallel to the top wall 38 of the base and perpendicular to the lid 26 (see Figs. 1 and 7) and a collapsed position that is within the outline of the lid 26 and parallel to this lies (see Fig. 4). For convenience, a release or release projection 50 is attached to the support member 46 near the front edge thereof. A translucent screen 52 mounted in a frame 54 is pivotably articulated to the support member 46 by means of a continuous hinge 56 so that it can move about a pivot point spaced from and parallel to the support pivot point formed by the hinges 48. The screen and frame 52, 54 are in a vertical, free-hanging position, as shown in FIGS. 1 and 7 , movable into a rest position in which they lie under the support part 46.

A reflective part 58 is attached to the cover 26 and the support part 46 and serves as a collapsible cross or cross brace which extends at an angle of approximately 45 'to the erected cover 26 and the support part 46, as shown in FIGS . 1 and 7 can be seen. The reflective part has a support arm 60 which is hinged to the lid 26 by the hinge 62 so that it can move about a pivot point between and parallel to the lid and support pivot points 42, 48, and a framed reflection mirror 64 which is pivotable is hinged to the support part 46 between and parallel to the support and umbrella pivot points 48, 56 . The mirror 64 is pivotally connected to the support member 46 by a hanger 66 which has a pivot connection 68 on the rear of the mirror 64 near the top thereof, and the pivot connection 70 to the support member 46. Additionally, a flexible band or strap 72 is attached to the top of the mirror 64 and the bottom of the support member 46 to provide stability to the support and to limit the pivotal movement of the depending link member 66. Interlocking locking means are provided on the support arm 60 and the mirror 64 to releasably secure the parts of the reflective member 58 at an acute angle to the incident light beam when the cover 26 is in the open position and the support member 46 is in the upright position so that the mirror 64 throws the reflected beam onto the upright screen 52 , as shown in FIG. 7 , so that the screen 52 is substantially filled with the projected image.

The interengaging latch means comprise a locking finger 60 a at the Stützarin which is bent at an angle thereto and engages into a suitable slot 64 in a rear of the mirror framed 64th When the finger 60a engages the slot 64a, the support arm 60 and mirror 64 form a rigid angle bracket which holds the cover 26 and support member 46 in the required relationship with one another. When they disengage by lifting the support member 46 and lifting the umbrella frame 54 into its rest position, the support arm 60 is automatically pivoted about the arm pivot point 62 into its rest position in which it lies against the inside of the cover 26 (as indicated by the dashed lines Lines shown in Fig. 7 ). At the same time, the mirror 64 is pivoted into its rest position, in which it lies against the underside of the support part 46, as is also indicated by the dashed lines in FIG . 7 is shown.

According to the F i g. 1 to 3 , light shields 74, 76 are pivotable on the opposite sides of the support part 46 by continuous hinges 78 or the like. Articulated so that the pivot points extend at right angles to the carrier and the screen pivot points 48, 56 . The light shields 74, 76 normally lie on top of one another within the cover 26 and under the shield 52, 54, as shown in FIGS. 2 and 3 can be seen. In the erected position of the screen assembly 28 , the light shields hang from the support member 46 and cooperate with the cover 26 and support member 46 and top wall 38 to provide a light containment for the incident and reflected rays and improved image contrast for that from to create the projected image of the device.

The cover 26 is releasably retained in the open position which extends substantially at right angles to the base of the support box 22. In the illustrated embodiment, two hinged supports 80 are hinged to each edge of the inside of cover 26 and releasably engage corresponding rails 82 on top wall 38 to hold the cover in the open position.

For a better understanding of the manner in which the umbrella structure 28 can be collapsed, a typical sequence of closing operations is described below with reference to FIGS. 1 to 4 and the various dashed lines in FIG. 7. The operator grasps the protrusion 50 to slightly lift the support member 46 upwardly as indicated by the arrow in FIG . 2 is indicated. This disengages the interlocking locking elements 60a, 64a . The screen 52, 54 can then be swung back about the pivot point 56, as shown in FIG. 2 is indicated by the arrow. When the screen 52, 54 swings back occurs, it with the lower end of the mirror 64 and the support arm 60 engages, causing the latter to its rest position in abutment against the cover 26 and the former is swung into its rest position against the supporting member 46 as indicated by the dashed lines in FIG. 7 is indicated. Finally, the light shields 74, 76 can be swung inwardly so that they lie on top of one another and lie under the screen 52, 54; the folded structure can then be pivoted about the carrier pivot point 48 into the rest position, as shown in FIG. 4 is shown.

The projector 20 can be used for front projection by folding the screen assembly 28 to its rest position within the cover 26 and placing the projector on the rear wall 32 by means of suitable adjustable supports so that the lens directs the image towards a distant screen throws. The projected image is oriented both from right to left and from top to bottom, since in the first case the rays are deflected twice after leaving the projection lenses, firstly by the mirror 64 and secondly by the translucent screen 52. The projector can consequently serve for front projection, with only the collapsible screen is removed from its erected position without the use of additional optical accessories.

Under the upper wall 38 of the base 24 of the support housing 22 is housed the projector mechanism, which has a drive device for film advancing means, film gripper and shutter optical elements, a magnetic sound reproduction device, a sound amplifier and various controls which cooperate in connection with the cassette 84 containing the film .

The cassette 84, which is shown in detail in FIGS. Is represented 8 to 10, is inserted into the base 36 through the pivotal side door 36a as g i from the F. 1 and 8 can be seen. The cassette 84 is received within a cassette receiving chamber formed below the top wall 38 of the housing 22. Since the various functions and controls of the projector 20 depend on an understanding of the cassette 84, reference will now be made to FIG. 8 to 10 explain the cassette in detail. In operation, the cassette 84 extends substantially in a horizontal plane, while the film F contained therein is wound in the form of a spool with the successive turns C lying substantially in a vertical plane. The projection optical path runs along a vertical axis, and the cassette is arranged so that the successive inner turns Cl which are fed into the endless loop L and around the cassette are reoriented so that they pass horizontally through a film window which the projection optics assigned. The projector 20 can thus be designed to be housed within a limited space available in a box or housing of a suitable overall size for maximum compactness and portability. In practice, the box or housing can be made very small, e.g. B. 38 cm long, 28 cm wide and 10 cm deep. It goes without saying, however, that the projector according to the invention can be accommodated in other forms of housing which are not necessarily portable and do not have a collapsible screen structure. One of the advantages of the invention is to provide a novel cassette structure which enables the projector of the invention to be operated by inserting cassettes one after the other, followed by simple manipulations and adjustments to permit continued operation. For example, a full-length sound film can be shown by providing the operator with the appropriate number of cassettes to be inserted into the projector one at a time, with only a few seconds delay between the projection of the last image from the previous cassette and the first image of the next, consecutive cassette occurs.

Since the film does not have to be rewound, the cassette is running out End of a playback process immediately ready to be played again.

According to FIG. 10 , the cassette 84 has a cassette housing 86 with front and rear walls 88, 90, opposing side walls 92, 94, a lower wall 96 and an upper wall 98 which define a generally rectangular space for the film F. Within this enclosed space, a horizontal reel plate 100 is mounted on the lower wall 96 of the cassette housing 86 so as to be rotatable about a vertical axis. The reel disc 100 has an upright central hub 100 a and a radially projecting annular platform 100 b . The film F is in the form of an endless spool having a plurality of turns C wound around the hub 100a. A loop L emerges from the inner coil Cl and is returned to the outer coil C2 after passing a prescribed path around the cassette case 86 . From the innermost winding Cl , the film F is guided around an idle and guide roller 102 pivoted at 104 on the lower wall 96 and then fed to a film indexing device which engages with the perforation holes in the film F and turns it along the prescribed path moved the circumference of the housing 86 and returned to the outer winding C2. In the embodiment shown, the film advancing device has a drive roller 106 which is rotatably supported in end bearings. The upper end bearing, not shown, is in the form of a hemispherical projection on an overhanging leaf spring 186 ( Fig. 6) which aligns the drive roller in engagement with its drive. The drive roller 1-06 has an upper set of teeth 106a and a lower set of teeth 106b (see FIGS. 15 and 16). The upper set of teeth 106a lies above the spool to engage the endless loop of film L in the vertical orientation in which it passes over the spool C. The lower set of teeth 106b is level to cooperate with the endless film loop L after it has passed around the circumference of the housing and through various cassette devices. The film is at such a height that it leads directly to the outer winding C2 of the spool. Each set of teeth 106a, 106b has teeth 106c which engage the perforation holes of the film to unwind the film, control its loop and rewind the film, the loop L being kept at a constant length. A guide pin 110 is disposed on one side of the drive roller 106 to assist in guiding the film F when it is engaged with the upper and lower tooth sets 106a and 106b, respectively, of the drive roller 106 . A pressure or spring finger U2 cooperates with the guide pin 110 to ensure that the film F does not disengage from the drive roller 106 when the cassette 84 is removed from the projector.

A substantially horizontally extending film window 114 is disposed on the front wall 88 of the cassette housing 86 and receives the film F as it is fed along its prescribed path within the cassette. The film window, the details of which can be seen in FIGS. 11 and 12, has a window body 116 and a pressure plate 118 which together form a film guideway which extends horizontally along the front wall 88 parallel to the lower wall 96 of the cassette 84. The window body 116 has a base plate # 116a that is reset in the middle along its upper surface and with a frame opening 116 b and an elongated gripper slot 116c is provided. The pressure plate 118 consists of an elongated portion 118a which is recessed along its lower surface and the front and rear ends of which are bent upward to provide unobstructed entry and exit ends for the film. The part 118a is provided with a frame opening 118b in the same extent with the frame aperture - b extends 116 when the window body 116 and the pressure plate are assembled 118th In a similar manner, the body 118 a is provided with an elongated gripper opening 118 c, which corresponds to the gripper estimate 116 c.

The window body 116 and the pressure plate 118 are held in engagement with one another by upright flanges 116 d, 116 e, 116 f and 116 g which are formed on the window body 116 in such a way that they the lateral projections 118d, 118e of the pressure plate 118 take up. The projection lens is arranged so that it projects a light beam substantially vertically through the aligned frame openings 116 b, 118 b . The film gripper occurs with the film. F through aligned slots 116c, 118c to intermittently advance the film through the window frame-by-frame. Means are provided in the cassette and in the projector to adjust the film window 114 with respect to the projection lens and the film gripper position depending on the insertion of the cassette 84 into the projector 20.

The Fümfenster 114 is attached in the cassette for vertical and lateral adjustments by means of upright stops 96 a, 96 b on the lower wall 96 of the cassette housing 86. The stops are aligned and in an interval parallel to the front wall 88 of the cassette case 86 angeordnet.- input -pair -120.- springs 122 above the pressure plate 118 of the Fümfensters 114 to the film window down, and from against the Bias adjustment device that aligns the film window and the film vertically and laterally when the cassette 84 is inserted into the projector 20.

In front of and behind the picture window 114 there is a looping device 124 which adjusts the film loop L with respect to the picture window 114 to ensure that there is a sufficient amount of film in the form of free loops in front of and behind the picture window 114 for the proper functioning of the associated ones Projector facilities. The loop-forming device 124 has a first loop setting finger 126 which is disposed in front of the foot window 114 and is pivotally mounted at 128 on the wall 96 , and a second loop setting finger 130 which is disposed behind the foot window and is pivotally mounted at 132 on the wall 96. The pivot points 128, 132 for the loop fingers 126, 130 are at a distance parallel to one another and to the axis of the reel plate. The loop adjustment finger 126 has an upright guide pin 126 in general, which guides the film F around prior to entering the film window. In a similar manner, the loop setting finger 130 is provided with an upright guide pin 130a around which the film guides after leaving the film window. The 90 'rotation is given to the film after exiting the guide pin 126a and before entering the window 114. Vertical alignment is restored after the film exits the film window 114 and moves around the guide pin 130a. The fingers 126, 130 are coupled for movement in unison by a link 134 which extends between them and is connected to the respective pins 126b , 130b on the fingers. A spring 136 anchored to the connecting member 134 Verb-üiide-n, e 'and to the lower wall 96 of the cassette housing 86 serves to bias the fingers 126, 130 normally into the operating position shown in solid lines in FIG. Outside the Kassette84 means are provided with a tetätigungsteil 126 c on the finger 126 engaging in contact and are actuated automatically during operation of the projector, uni fingers 116, 130 in the F g in i. 10 retracted or inoperative position shown in dashed lines to pivot. The pivot 128 of the finger 126 carries a guide roller 138 which assists in guiding the film around the drive roller 106 .

As the film F leaves the rear finger 130 , it travels along a path parallel to the side wall 92 of the cassette, around an idler roller: t40, along a path parallel to the rear wall 90 around an idler roller 141 ' . The film then passes through a device 144 which aligns the film F in the operative position with a magnetic tape head 346 and tape roll 348, both of which are located outside of the cassette 84. The device 144 is disposed on the side wall 94 of the cassette case 86 and includes a pivotally mounted pinch roller lever 146, the _The g about a pivot point 148 between F i in. 10 , the retracted position shown in solid line can be pivoted back and forth entirely within the cassette and the drive position shown in dashed line. The side wall 94 of the cartridge case 86 is cut away at 94a. The change pressure roller lever 146 has a centrally mounted, with the sound roller in contact, rubber-coated pressure roller 150 and idler rollers 191, 194, which are arranged on opposite sides. A guide pin 156 is provided at a distance from the tar roller 15.4. In the retracted or inoperative position of the pressure roller lever 146, the film passes between the idler roller 154 and the guide pin 156 , is partially guided around the pressure roller 150, which is in contact with the drum, and passes behind the idler roller 152 . The film then runs through a damping device to your lower set of teeth 106 b of the drive roller. 106, whereupon the film is returned to the outer turn C-of the sink C. The pinch roller lever 146 is normally biased to its retracted or inoperative position by the spring 157 which is anchored to a pin 158 and connected to the pinch roller lever 146 at a point remote from the pivot point 148. The pinch roller lever 146 is in the form shown in FIG. 10 , the operating position shown in dot-dash lines is pivoted by means which enter the cassette 84 when the projector devices are moved from the stop position to the run position.

The cushioning device includes a cushioning arm 160 hinged at 104 and carrying a cushioning idler roller 162 which is positioned along the film after it exits the device 144 and before it reaches the drive roller 106 . A spring wire 164 is connected to the damper arm 160 and attached to a pin 158.

The damping device cooperates with the flywheel to keep disturbances of the film due to the intermittent action of the operating roller 106 away from the magnetic head 346 of the sound reproducing device.

When the cassette 84 is inserted into the projector, the film window 114 and film F are adjusted both vertically and laterally, and the upper end bearing engages the drive roller 106 in axial alignment with the drive 232. Upon actuation of the projector controls, the The dragging finger 126, 130 is withdrawn from the film path and the pinch roller lever 146 is moved into the operative position to bring the film into the sound reproduction position. In addition, the winding disc 100 for the filin F and the drive roller 106 are driven to continuously unwind the film from the innermost turn Ci, return the film to the outermost turn C2 and create a continuously completed loop L of a fixed size for the intermittent projection of the film F and the coordinated sound reproduction.

In the following, with reference to FIGS. 5 to 15, the projector means and associated controls described in detail, the zugammeliwirken with the film cartridge containing the 84th The base 24 of the support housing 22 has a chassis plate 166 which is spaced parallel to the upper and lower walls 38, 40 of the base 24. The chassis plate 166 supports a number of upstanding and depending partitions which divide the interior of the base 24 into a number of chambers which receive the various parts of the projector equipment. According to FIG. 8 , the chassis plate 166 and the upper wall 39 together form the cassette receiving chamber 168, which has an opening 168 a for receiving the cassette 84. The opening is closed by the door 36 a pivotably hinged to the side wall 36 (see FIG. 1 ).

According to FIG. 6 , devices are provided on the edges of the cassette receiving chamber 169 to hold the cassette 94 in a set operating position for projection of the film images and for sound reproduction. (6 G in F i. In dot-dash lines) at the edges of the cassette are provided Niederhalteklammem 170, 172 and 174, of which the brackets 170, 172 at the front corners of the cassette housing 86 and the bracket 174 on one of the rear corners are arranged. At the other rear corner, a guide loop 176 extends at an angle from the door opening 36a to the. Bracket 174 to the . Ka # -: sette- to-lead 84 during 'insertion into KassettehaÜfnahmekammer 168th An abutment 178 ' vörg # 7, which rests on the wall 94 of the cassette housing 84, can be seen along the side of the cassette receiving canister between the hold-down clamps 172, 174. The abutment 178 is provided with a spring biased ball 180, which in one orientation seat 94 b - is taken up in the wall 94 to accurately align the cassette 84 in the chamber 168 (see F i g 8 and 10..). The abutment 1L78 is additionally provided with a further hold-down bracket 182 which flies onto the corresponding part of the cassette housing 86 in order to aid its alignment in the chamber 168.

A mounting rail 184, which is attached to the chassis plate 166 and carries a projection lens 186 , extends across the front end of the cartridge receiving chamber 168. The projection lens 186 includes a lens mount 188 which at its - is -versehen groove 188 a - circumference with an annular. The lens rim 188 is vertical. adjustable in a bezel block 190 , d6i, attached to the rail 184. The enclosure 18.9 has 'a conventional' Pfojektionslinse which projects with suitable focusing an image of the intermittently moves past the film gate 144 of the film "on the translucent screen 52. * After the F i g. 8 and 9, the Housing 86 for the cassette 84 at its front end at a point which extends inwardly from its front wall 88, is provided with a cutout W - which is so dimensioned and. Arranged that it has the projection ' Imse so that its optical axis is properly aligned with the light source and film window 114.

According to FIGS. 1 to 14 and FIG. 6 cooperating means are provided on the projector and in the cassette, e, which align the film window i14 with respect to the optical path in response to the insertion of the cassette 84 into the cassette receiving chamber 168 . Are substantially identical adjustment portions 192 to opposite sides of the projection lens 194. #rorgesehen - on the chassis plate 166 and. Since the sectional views of FIGS . 13 and 14 go through the setting part 194, it is sufficient to describe this in detail. The adjustment member 194 - has an inclined ramp 194a on #, which merges into emie horizontal surface 194.b which -. A contacting upward jumping forward, the film carries pin 194 c .. The adjacent portions of the front wall and Bodenwand96 88 of the cassette housing 86 are cut in such a way that 'the adjustment portions can be included in the cassette 84th According to the F i g. 13 and 14, the ramp 194 engages the adjacent edge of the film window 114 in order to raise it against the bias of the hold-down springs 120, 122 and to achieve an exact vertical alignment for the film window in relation to the optics of the. Projector. When the cassette 84 is inserted in its operative position, the pin 194c enters corresponding notches 116h, 1.18h in the window body 116 and the pressure plate 118 of the film window 114, so that the stub 194 c both the film window and the film .F. laterally or horizontally in relation. Optimally equips the optics and the gripper: This ensures precise alignment for the film when: it passes through the film window. The adjustment parts 192, 194 give the film window 114 a three-dimensional orientation.

Since the optics and manner of adjustment of the projection lens 186 are essentially common, only a brief description is required. A suitable projection lamp 196 is accommodated below the chassis plate 166 in a lamp compartment BC (FIG. 8) which is arranged approximately in the middle of the base 24. The light from the lamp 196 is thrown through the mirror 198 up through the shutter device and the corresponding cutouts 166a, 96a provided in the chassis plate 166 and the lower wall 96 of the cassette housing 86 , respectively. The incident light beam then passes through the side and vertically adjusted film window 114 and film F and through projection lens 186 onto mirror 64 ( Fig. 7), whereupon the reflected beam is thrown onto translucent screen 5Z.

. Conventional means are provided for vertically adjusting projection lenses 186 to focus the projected image on screen 52. According to the F i g. 5 and 8 , a focus knob 200 is attached to a control panel 202 which is secured below the chassis plate 166 at a location accessible through the door 36a. The button 200 is connected by a flexible cable 204 to a cable reel 206 on which a cable 1208 is wound which leads to a drum 210 which is mounted on the mounting block 190 (see FIG. 8). The drum 21Q has a drum shaft 212 which supports a preload coil spring 214 and carries an eccentric 216 which has a pin 216a which engages in the singular groove 188a of the lens rim 188 . - By turning the setting knob 200, the eccentric pin 216 a is set against the influence of the bias spring Z14 via the cable reel 206, the cable 208 and the drum 210 in order to move the bezel 188 vertically and cause a corresponding change in the focus of the projected image .

In the following, with reference to FIGS. 5 to 10, the projector actuation and control devices are described which, depending on the handling of a single control lever 218 (see FIGS. 1 and 6), achieve a number of coordinated functions, including engaging drive connections to the coil plate 100 and the drive roller 106, operating - of the gripper and of the diaphragm device, guiding the film for disconnecting play his Tonstreifens and retraction of the loop forming finger 126 ,. 130. The actuation and control devices comprise a sliding plate 200 which is movable relative to the cassette receiving chamber 168 from a stop position (which is shown in FIGS. 7 and 8 in solid lines) to a running position (which is shown in FIG is illustrated g. 9 in solid lines). In the embodiment shown, the plate 220 is suspended from three mounting pins 222, 224 and 226 for vertical translational movement (see FIGS. 6 and 7). Appropriate springs 228 (see FIG. 7) are attached to the respective pins between chassis plate 166 and plate 220 to normally move the plate to the stop position of FIG . 7 and 8 to be preloaded. - The plate 220 is slidably fitted in the stopping and running position by means of the control lever 218th

A film drive is attached to the plate 220, which, in cooperation with the devices in the cassette 84, is displaceable as a function of the movement of the plate 220 from the stop position to the running position. The film drive has a spool drive 230 which is displaceable for driving engagement with the spool 100 , and a drive roller drive 232 which is displaceable in driving engagement with the drive roller 106 (see FIGS. 8 and 9). The reel plate drive 230 has a drive shaft 230 a, which is rotatably mounted on the plate 220 and carries a bevel gear 230 b , which is displaceable through a cutout 166 b in the chassis plate 166 in engagement with a complementary coupling nut part 234, which is coaxial with the reel plate 100 lies and is attached to it. The complementary coupling nut part 234 is accessible through a suitable cutout 96 b in the lower wall 96 of the cassette housing 86 ( FIG. 8) which essentially corresponds to the cutout 166 b in the chassis plate 166 . The bevel gear 230 b and the coupling 234 serve as a protruding and receiving part of a coupling in order to drive the reel table 100 from a main drive. It has been found that it is convenient to drive the bevel gear 230b with slippage so that if an obstacle occurs in the free feeding of the film around the cassette during operation of the projector, the clutch slips and thereby tearing of the film is avoided.

According to the F i g. 6, 15 and 16 , the drive roller drive 232 has a drive shaft 232 a and a bevel gear 232 b , which are rotatably mounted on the plate 220 about an axis which extends coaxially to the drive roller 106 . The bevel gear 232 b is displaceable in engagement with a complementary coupling part 106 c which is formed in the underside of the drive roller 106 , as shown in FIGS. 15 and 16 can be seen.

The reel table drive shaft 230a and the drive roller drive shaft 232a are coupled to one another by respective pulleys 236, 238 which are engaged with a clutch belt 240. The diameters of the belt pulleys are selected so that the necessary drive ratios for the reel disc 100 or the drive roller 106 are established. In the embodiment shown, the drive roller drive shaft 230 a is driven by the diaphragm device, which will be explained in the following.

According to FIG. 9 , the shutter device 242 is essentially of conventional construction and has a shutter wheel 244 which is arranged on a shutter wheel shaft 246 which extends vertically and parallel to the drive shafts 230a, 232a. The diaphragm wheel 244 is driven at its edge 244 a and is provided with the usual diaphragm windows 244 b, which move alternately in the optical path between the mirror 98 and the film window 114. Furthermore, the screen device 244 has a gripper 248 which is pivotably mounted on a vertical gripper shaft 250. The gripper shaft 250 is in turn carried by an image control lever 252 which is rotatably mounted on the plate 220 at 254. The gripper 248 is of of setting the iris, direction in a four-movement conveyor track moves, so that the gripper fingers 248 a extending upwardly through the cutout 166a in the Chassisplatte166 and the matching cutout 96 a (F i g. 8) in engagement with the Perforationslöchem of the film move, which is moved forward through the film gate 144; the gripper fingers moving in a forward stroke, then retracting and exerting a backward stroke to readjust themselves for the next conveying sequence. The gripper 248 includes a cam follower 248 b having two faces, one face of which slides on the end surface of a first cam 256, the center of the aperture wheel 244 (see Fig. F i g. 9) is fixed, and the other surface on the radial Slides the cam surface of a second cam 258 which protrudes upwardly from the first cam 256 and is centrally attached to the aperture wheel 244 (see Fig. 6). A hold down spring 260 abuts the claw 248 to the cam follower 248 against the cam 256 for urging. A coil spring 262 is connected to the gripper 248 and the Paltte (s. F i g. 6) 220 anchored to the cam follower 248 b bias against the cam 258th The diaphragm device described is essentially of conventional design and only one embodiment.

Image control knob 264 (see FIG . 5) can be used to adjust image control lever 252 about pivot point 254 to adjust gripper 248 with respect to the film. The button 264 is coupled by a flexible cable 266 to a movement screw 268 (see FIGS. 5 and 6) which is screwed to a driver 270 attached to the lever 252. Thus, by adjusting the image control knob 264, the lever 252 can be pivoted about its pivot point 254 to align the gripper pivot point 250 and thereby adjust the gripper 248 so that successive frames are properly set in the film gate opening.

The driven diaphragm wheel 244 of the diaphragm device 242 is connected to the drives 230, 232 in order to give them a drive movement. For this purpose a worm housing 272 is provided which is attached to the plate 220 and which receives the end of the shutter wheel shaft 246. The shutter gear shaft 246 carries a drive worm 274 which meshes with a driven worm gear 276 which is attached to an angularly extending coupling shaft 278 which extends from a location below the plate 220 on the shutter drive shaft 246 to a location above the plate 220 the drive roller drive shaft 232 * extends (see Figs. 5 and 6). On theirs. from the end remote from the housing 272 , the coupling shaft 278 extends into a further worm gear housing 280, whose worm and worm gears 282, 284 the drive connection from the diaphragm device to the drive roller drive shaft 232 a and then via the belt and pulley coupling 236 # 238, 240 to the reel table drive shaft 230a completed. Depending on the drive of the diaphragm device 242, there is consequently a coordinated drive of the reel plate 100, the drive roller 106 and the gripper 248.

According to the F i g. 5 and 6 and the schematic representations of FIG. 15 and 16 is the blender #, räd 244 der Bleiid (biibifi fichfüng 242 'by eiftUn Main electric motor 286 running along the belt, which is in the support housing in eu a combined motor and fan compartment MC is housed and vöft a 110 volt AC power source. The motor shaft 288 of the motor 286 extends from this in opposite directions. the Mötotwelle 288 is horizontal and perpendicular to dör lead wheel shaft 246, the reel plate shaft 230 a and the drive shaft 232 a atigeord- tiet. The motor shaft 288 drives an in-your compartment MC arranged fan 290 on. An air outlet 38a (see Fig. 6) is provided in the upper panel 38 and is in connection with the compartment MC Let air out of this. This creates a ventilation gttöfn generates, uni the heat from the incandescent lamp part BC albführung, being relatively cool Air with ambient c-m-per-a-tur-vio . n below the Cassette receiving chamber 168 iii the light bulb compartment enters. The Motörwel1ä288 extends in Opposite direction of your fan 290 through the # rennwänd5 which the AbteiIMC gfeü2t, and taht one. Afiffiebgschtibe 192. One in Auxiliary pulley shaft 294 supported by a bearing 296 is arranged in front of the drive pulley, 292 and. he- Extend it at an angle with respect to the motor shaft 288. The auxiliary or pulley shaft 294 carries the. 298e 3b0. To the Sü, häibefi 292, 299, 300 is a drive belt 302 he-r-um, g'e'fühtt, who after your bringing about the Discs 298, 300 are located in the essential part of a court ,; zontaleii plane extends and driven around a Disk 304 is running around, The disc 304 is on a seed shaft 306 stored, which is attached to a Sühweüaebe # l 308 on the plate 2.20 on the pivot shaft 31-0 is attached to. Köaxialz-ur powered Süheibo 304 is a rubber-coated drive wheel 311 which is in the same plane with the edge 244 a of the flower wheel 244 lies. According to FIG. 5 is with the pivot lever 308 and the plate 220 dm e- Spring connected 312, which serves the güüiini- Exaggerated Aüttiebi # wheels 31i itgen ' the edge'de tlefidetLtadüS 244 vör% Ugpanü6n. The -arm 308 b of the Schwenkhäbels 308 is held üü Mügile to the drive town 311 except Köntäkt with the Blen- dentad 244 squeezes hälten When the Löslöseü FMef 31.2 - the iitiTe # sratl 311 in (2 # men the edge driving attack with the Btt) ideneitnichtung, Urft an A-Ntriebsverbindimg -von dem Mötor over the right-angled screw threading 298, 300, 304 to complete, The b6sth-riebeü-eAntriebsänord- hung enables the most effective use of the Space within the base 24 of the support housing 22, and the exploitation of the 131eüdeiltihi'.ichtunä-Zuni Driving the ka # settpfih-ntfiebe 230, 231 GewälYr # does this in a köfjlpäktbt and expedient manner Derivation of the erfötd6tIiehe # n Leistartig # äLbzapfnahm6ii in a relatively simple physical arrangement 'of a single engine. The common control for the projector routing Fits an I-1, actuator or slide plate 314 ( Figs. 5 and 6), the mix of the chassis plate 166 and the plate 110 is aligebtdnet and by a SteUe7rfrä: vene in A # bh-a-ngigkäit, (, ö-n of the handling of the control handle 218 from a stop position LatifstäU'ftg agile, in which the course of the pro jektörg 2Ö is initiated. In alienation 'vöü der BeWagtuig döS -Häuptgtauerteübs 314 by means of this support beam, the plate 2.20 is moved from its stopper position into the running position to engage with the drive actuators 23Ö, 232 and the gripper 249. The soaps forming fingers 126, 130 are withdrawn from the film path through the cassette, the lever 308 is actuated to align the film to the oil reproducer outside the box, ssA, ttc, the drive wheel 311 of the main drive, s moves with the edge drive engagement The diaphragm filament 244 is connected to the electrical circuits. The control part 314 is so large . forms and arranges so that it does not interfere with the various functions performed by disk 220, and. is suspended from the chassis plate 166 by several guide pins 316 a, 316 b , which correspond to the corresponding. Sr-hlitzoü-314a5 314b iiii engagement, which are formed in the control part 314. -The control handle 218, which moves in äiüäiü slot 38 b in the -öbereji wall 38 (g. F i g. 1, 5 and 6), moves the main control part 314, -whose steumrttävötse by a control lever 319, which with a Pinion shaft 320 is connected. The shaft 320 carries a rivet 322 (P i g. 5), which lies under the chassis plate 166 and lies essentially in the same plane as the sliding control part 314. The pinion 322 has a pinion segment 322a, which meshes with a toothed rod 324 on the control # part 31, 4 in order to move the control part through the control cross member from the stop position into the running position.

The various control radio flutes that are reached by the movement of the control part 314 are shown in FIGS. 15 and 16 and the detailed drawings of the P i g. 5 to 10 can be seen. The control part 314 b moves the plate 220 into its running position by actuating a camshaft 326 (see FIGS. 7 to 9) which is mounted on the chassis plate 166 by suitable bearing blocks 328, 330 (see FIG. 5). The Nötkeilwelle 326 lies under the plate 220 and has a Noäken 331, which is designed so that the plate 220 is lifted into the release position depending on a limited amount of travel that is given to the Nöckeuwglle 326 . This bögtiiförmigü movement of the cam shaft 326 left by eifleil actuating lever 334 which is geküppelt by eih f16xi'bles Vürbindünggglied in the form of a spring 336 with your Steuefteil 314th The Vutwtndüfig of the flexible Verbitidungsgliedes 336 allows the displacement of the plate, but it does not interfere with the continuous movement of the control part 314 due to its Steuerüave: rsij for its various additional and associated Vünktimes. If the control part 314 moves to the right in the lowermost top view of FIG . 5 is moved and the Riizblsegment 322a ötitgegeü to the clockwise direction., The pinion shaft 320 is rotated, a force About & § flexible Verbindund # membered barren the spring 336 ä7üf geitragen the lifting noise 334, which rotates the cam shaft 326 in an appropriate direction to to raise the plate IM into its running position, which is shown in FIG . 9 is shown # According to Figures # # and 9 , the chassis plate 166, which is provided with the cutouts, would be laid out for the purpose of accessing the multiple-stage housing required because of the cassette, that eiiie üiüxitüal # e Didlft>, -üäU kohlpäkte arrangement of the parts below # half - dÜr ChäS ## isplattü tr-Ititht - wi-rdg to achieve a really # speaking reduction in the total height of the facilities and thus an extremely compact, transportable one In time relation to the displacement of the plate 220 into its running position, the control member 314 retracts the looping fingers 126, 130 into the cassette located in the chamber 168 by an actuating pin 338 ( FIG. 6) which is pushed upwards through a section 166 c in the chassis plate 166 and protrudes on the side of the cassette.

The actuation pin 338 is arranged to enter cutouts in the adjacent wall and bottom of the cartridge housing 86 to contact the actuator 126c on the finger 126. When the controller 314 moves from right to left in FIG. 6 (and g in F i. 10) moves the actuating pin 338 occurs with your actuator 126 c in contact to the loop forming finger 126 clockwise around the pivot point 128 from the in solid line in F i g. 10 to pivot into the retracted position. At the same time, via the connecting member 134, the finger 130 is pivoted clockwise about the pivot point 132 into its corresponding retracted position. The actuator 126c is arranged below the level at which the film passes around the finger 126 , and the actuating pin 338 is arranged in the same plane as the actuator 126c in order to avoid disturbing the movement of the film.

The actuation pin 338 is received in a slot 314c (see FIG. 5) formed in the control part 314 and is held against an end wall of the slot by a spring 340 which is anchored to the control part 314. Consequently, after the actuating pin has carried out its control function within the cartridge 84,338, 314 to continue the control part its controlled movement, wherein the connected to the spring pin 338 and slot 314a, a compound (with play) between the pin 338 and the control part 314 forms .

The lever 308 is (g F i. 5) by the pin 342 betätig 'of the upwardly d projecting through a cutout 166 in the chassis plate 166 on one side of the Kas -sette, 84 and is arranged so as to corresponding to a Cut-out in the adjacent wall and on the underside of the cassette housing (see FIG. 10), when the control part 314 moves from right to left in FIG. 6 (and FIG. 10) , the actuation pin 342 consequently engages the actuator 146a to move the pressure roller lever 146 about the pivot point 148 out of the position shown in FIGS. 10 and 15 in the position shown in solid line in the position shown in Fig. 10 (and schematically in Fig. 16) shown in dashed lines to align the Füm.F to the sound reproduction device outside the cassette. The actuation pin 342 is received in a slot 314a formed in the control member 314 and is biased onto one end wall of the slot by a spring 344 anchored to the control member 314. After the actuating pin 342 has performed its control function within the cassette, the control part 314 can continue its control movement, the spring 344, the pin 342 and the slot 314 a form a connection (with play) between the pin 342 and the control part 314, according to the F i g. 6 and 10 , the magnetic sound head 346 is arranged on one side of the cassette receiving chamber 168 opposite the cutout 94 a in the wall 94 of the cassette housing 86 so that the film F comes into contact with it by the outward displacement of the pressure roller lever 146 and its rollers 150, 154. The audio reel 348 is mounted in a bearing 350 near the audio head 346. The sound roll extends into a flywheel shaft 352 (see FIG. 5) which carries a flywheel 354 which lies below the chassis plate 166 and the control part 314. During playback of the magnetic sound strip, the rubber-coated roller 150 rests against the sound roll and cooperates with the damping structure 160, 162 to ensure uniform movement of the film past the sound head 346 and a correspondingly accurate reproduction of the sound recorded on the magnetic sound strip of film F. To ensure information.

In addition, causes the control part 314 (after the displacement of the plate 220 into its running position external engagement of the loop-forming fingers 126, 130 and internal engagement of the sound reproduction device) the release of the drive wheel 310 for movement under the influence of the spring 312 in edge drive engagement with the aperture wheel 244 the F i g. 5, 15 and 16 , the front end of the control part 314 is connected by an actuating member 356 to an actuating lever 358 which is articulated on the carrier 320 coaxially to the lever 308 at the pivot point 310. The connecting member 356 is coupled to the control part 314 by a pin 360 which is received in an elongated slot 356 a in the member 356 . The opposite end of link 356 is connected to actuation lever 358 by pin 362 . The pin 362 has such a length and is arranged so that it lies against the arm 308 b of the lever 308 in order to hold it against the bias of the spring 312 in a position in which the drive wheel 311 is out of engagement with the aperture wheel 244 is. When the control member 314 finishes its control movement, the pin 362 moves freely from the arm 308 b, thereby enabling the spring 312 to establish a driving relationship between the drive roller 310 and the shutter wheel 244.

In the embodiment shown, the excitation circuit for the motor 296 and the amplifier 364 assigned to the magnetic sound head 346 is closed as a function of the movement of the control part into its running position.

The amplifier has a volume control button 367 , which is accessible through the door 36 a. The amplifier 364 need not be described in detail because it can be designed very differently; Suffice it to say, the sound amplifier receives a sound input from the magnetic sound head 346 and its output is connected to a loudspeaker 365 ( Fig. 6) . The loudspeaker is housed in the base 24 of the support housing 22 below its top wall 38, which is provided with a loudspeaker grille 366 overlying the loudspeaker 3-65.

According to the F i g. 15 and 16 , AC input lines 368, 370 are connected to excitation circuits for motor 286, amplifier 364, and lamps 196 , respectively. A microswitch 372 is provided in the line 370 (see FIG. 5), which is arranged in such a way that it is closed by the actuating lever 358 when the control part 314 moves into its running position. Closing microswitch 372 closes the excitation circuits for motor 286, amplifier 364, and lamp 196.

The control member 314 is normally biased to its stop position by a spring 374 (see FIG. 5) connected to the control member at pin 376 and anchored to the chassis plate by a bolt or pin 378. It is provided that, depending on the termination of the control movement of the control part 314, this is releasably fastened in its running position. According to the F i g. 5, 15 and 16 , a pawl 380 is pivotably articulated on the chassis plate at the pivot point 382 so that it engages with a detent 384 on the control part 314. The pawl 380 is biased and is arranged to releasably lock the control member in its running position when the nose of the pawl 380 is engaged with the detent 384, and the arm 380 is held in position by the solenoid 386 . When the solenoid 386 is de-energized by the switch 388 , the detent 384 is released and the spring 374 brings the control part 314 into its stop position. According to fig. 15 and 16 , the excitation coil 386a of the solenoid is connected in parallel to the lines 368, 370 via a control push button 388 (see FIGS. 1 and 6) . Accordingly, when the operator depresses the push button 388 , the thief solenoid 386a energizing circuit of the solenoid 386 is broken, thereby retracting the pawl 380 so that the control member 314 moves back to its stop position. This causes a corresponding movement of the plate 220 into its stop position, the pivoting back of the pressure roller lever 144 and the restoration of the free loops in front of and behind the foot window 144 by the loop-forming fingers 126, 130.

For a better understanding of the invention ün following a typical sequence of operations is described = The collapsible screen 28 is, as before, in conjunction - with the F i g. 1 to 4 and 7 described, in the F i g. 1 and 7 shown working position erected. Then the cassette 84 is inserted into the cassette receiving chamber 168 through the open door 36a. Upon insertion of the cassette 84 into its operative position, as effected by the various reference means 170, 172, 180 , etc., the film window 114 is oriented both vertically and laterally and the film F is precisely positioned in the film window through the Guide the reference pins 194 c>, 192 c arranged. After inserting the cassette 84, the hinged door 36a is left open to allow the operator access to the focus button 200, the image control button 264 and the volume control button 367 . The machine is now ready for operation. Operation is initiated by the operator pulling the control handle 218 forwards in its arcuate path, which causes the pinion shaft, 320 and pinion 322 to turn clockwise (viewed from above) . Stetierteil 314 moves iii its control path, wherein g in the-substantially from right to left, in F i - is characterized. 6 gift, # moved. This initiates all coupling and control functions that are required to put the projector 20 into operation. This causes the platen 220 to move vertically to close the drive conditions to the reel table 100 and drive roller 106, respectively. In addition, the gripper 248 is positioned to intermittently move the film F as it passes through the film gate 114. The free loops of the film F in front of and behind the film window 114 were previously formed by the loop-forming fingers 126, 130 , which are normally biased into the operating position by the spring 136. Simultaneously with the aforementioned controls, which were initiated by the displacement of the plate 220, the loop- forming fingers 126, 130- are withdrawn into a free position in which they do not interfere with the conveyance of the film around the cassette in the endless loop L, and the Pinch roller lever 146 is swung to its operative position in which the film is moved outside of the cassette and into engagement with magnetic tape head 346 and tape roll 348. In the last part of the control movement, the drive roller 310 is moved into driving engagement with the edge 244a of the diaphragm, the motor 286 is excited, the amplifier 364 is excited, and the control part 314 is locked in its running position.

The operator then only needs to make the necessary adjustments to the focus setting, the image setting and the volume by actuating the control buttons 200, 264 and 367 . A few seconds after the cassette 84 is inserted into the cassette receiving chamber and the control handle 218 is moved to the operative position, a well delineated and in focus image is displayed on the screen along with the sound derived from the magnetic soundstrip on the film.

The film is projected continuously and will repeat itself until the operator turns off the projector. Shutdown is accomplished by simply depressing the push button 388 located near the control handle 218 . When the button 388 is pressed, the solenoid is de-energized, the pawl 380 releases the control part 314, so that the latter is moved back into its stop position by the spring 374. When the control part 314 performs its return stroke, the pin 362 on the actuating lever 358 pivots the lever 308 into a position in which the drive wheel 310 is moved out of engagement with the lead wheel 244. The switch 374 is opened and interrupts the excitation circuits for the motor 286, the amplifier 364 and the lamp 196. The further backward movement of the control part 314 moves the plate 220, the reel plate drive 230, the drive roller drive 232 and the gripper 248 into the clearances in with respect to the cassette 84 moved. At substantially the same time, the actuation pins 338, 342 move out of the cassette 84, whereupon the looping fingers 126, 130 are moved back into their operative position along the film path and the pinch roller lever 146 is moved back into the cassette. Thereupon the loop - forming fingers again I adjust the film in relation to the foot "help st." Dr 1i4, whereby the cassette is ready again for the replay of the film then contained. The cassette - is free of all connections to the projector equipment, so that it can be removed from the cassette receiving chamber. In a few seconds the operator can insert a new cassette into the chamber and initiate operation of the projector devices by actuating the control handle 218. By switching from cassette to cassette in a substantially instantaneous manner, the operator is enabled to conduct an ongoing audio presentation with essentially no loss in the continuity of viewers of such presentation as might be the case if the presented one were necessary Rewind the film and thread the new film through the projector equipment or carry out new cumbersome adjustments.

Claims (1)

Claims: 1. A transportable sound movie projector with insertable cassette, d a d u rch g e k hen -zeichnet that the axes of the lens (186), the diaphragm (244), the capstan (348) and the drive roller (106) parallel to each other and that the plane of the film is rotated 90 ' . 2. - Film projector according to claim 1, characterized in that the lens (186), the diaphragm (244) and the sound roller (348) are part of the projector device (F i g. 8) and the drive roller (106) is part of the cassette (84 ) and can be removed with this ( FIG. 10). 3. film projector with retractable cassette according to claim 1 or 2 with a running and a stop position, in which the cassette contains a film with a sound track, characterized in that the projector device has a sound reproduction device (346, 348) which is outside the film cassette (84) is arranged, and that a device (144) is provided which can be actuated when the cassette is inserted in order to align the film outside the film cassette in sound reproduction relation with the sound reproduction device in the running position. 4. Film projector with retractable cassette according to claim 3, characterized in that the device (144) has a pivotably mounted pressure roller lever (146) with a pressure roller (150) to guide the film outside the cassette (84). 5. A film projector according to claim 4, characterized in that the spool plate (100), the drive roller (106) and the pivotably mounted pressure roller lever (146) are arranged so that their respective axes are parallel. 6. Film projector according to claim 5, characterized in that the projector device tD has a projection lens (186) and a diaphragm (244), the axes of which are parallel to the axes of the spool plate (110), the drive roller (106) and the pivotably mounted pressure roller lever . 7. cassette for film projector according to claim 4, characterized in that the cassette has a film window (114) which lies in a plane substantially at right angles to the axis of the spool plate (100) . 8. Film projector with retractable cassette according to one of the preceding claims with a running and a stop position, characterized by a retractable drive roller drive (232) in the projector device and a device (220) for retracting the drive roller drive (232) with respect to the cassette receiving chamber (168 ) for inserting and removing the cassette (84) in the stopped position of the projector and for moving the drive roller drive (232) into driving engagement with the drive roller (106) for unwinding and winding the film in the cassette in the running position of the projector. 9. A film projector according to claim 8, characterized in that the drive roller (106) and the retractable drive roller drive (232) are self-centering, so that an exact alignment of the same is not necessary for the engagement of the drive roller and the drive roller drive: 10. Film projector with retractable cassette after Claim 8, characterized in that the cassette (84) has a film port (114) and the projector means has a gripper (248) and means (248b, 256, 258) for moving the gripper relative to the film port of the projector to move the To move the film forward intermittently through the window in the running position. 11. A film projector according to claim 10, characterized by a diaphragm drive (311 in FIG. 6) which is engaged in the running position of the projector and disengaged in the stop position. 12. A film projector according to claim 5, characterized by a reel plate drive (230) which is engaged in the running position and disengaged in the stop position. 13. Film projector according to one of the preceding claims, characterized by a sliding plate (220) on which the drive roller drive (232), the gripper (248), the diaphragm (244) and the diaphragm drive (311) are mounted for movement in a drive relationship in the running position and out of the driving relationship in the stopped position of the projector. 14. Film projector according to claims 12 and 13, characterized in that the reel plate drive (230) is attached to the displaceable plate (220). 15. Film projector with retractable cassette according to claims 8, 10, 12 and 14, characterized in that the drive roller drive (232), the gripper (248) and the spool drive in the stop position are out of engagement with and outside the cassette and in the Running position are movable in engagement with the cassette. 16. Film projector according to one of claims 13 and 15, characterized by a uniform control (314) for moving the displaceable plate (220) into the operating position in the running position of the projector. 17. Cassette for film projector according to claim 1, characterized in that the cassette (84) has a Fümfenster (114) and a loop-forming device (126, 130) which is arranged in front of and behind the film window for setting the Fü'mschle- ife mi referring to the movie window. 18. Cassette for film projector according to claim 17, characterized in that the loop-forming device has fingers which are arranged along the film path in the stop position of the projector and are removed from it in the running position. 19. Cassette for film projector according to claim 1, characterized in that the cassette (84) has a film window and that cooperating devices (F ig. 14) on the cassette and the projector are provided to the film window with respect to align the optical path of the projector. 20. A film projector according to claim 1, characterized in that the drive roller (106) has two sets of teeth (106a, 106b) in order to unwind the film, to control its loop and to rewind the film. 21. A film projector according to claim 13, characterized by a unitary control which, when it is moved into its operating position, moves the drive elements on the displaceable plate (220) into the running position. 22. Film projector according to claim 21, characterized by a magnetic locking device which can be actuated -when the uniform control is in the operating position in order to hold the projector in the running position until it is switched off. 23. A film projector according to claim 22, characterized by means to move the unitary control and the sliding plate (220) back into their non-operational positions and, accordingly, to bring the projector into the stop position. 24. Fümprojektor according to claim 1, characterized in that the projector is mounted in a compact and transportable housing (22) and has its own screen (28). 25, film projector according to claim 24, characterized in that the screen consists of elements (46, 74, 76) which form a light-shielded chamber (Fig. 1) which encloses the path of the projected image. 26. A film projector according to claim 25, characterized in that the light-shielded chamber enclosing the path of the projected image has a mirror (64) to interrupt the light path, reverse the image orientation and reflect the image on the screen. 27. Film projector according to claim 26, characterized in that the mirror is automatically erectable ( Fig. 1 to 3) and is held in a position in which the image is deflected substantially by 90 ' to the image on the screen to center. Documents considered: German Auslegeschrift No. 1191687; German patent application B 22120 IX a / 57 a (published on January 19, 1956); . German Gebrguchsmuster No. 1906 339, 1709 572; French patent specification No. 1308 551.