DE1263342B - Slide projector with ring-shaped slide magazine - Google Patents

Description

Slide projector with ring-shaped slide magazine The invention relates to on a slide projector with a guide for the rotatable mounting of an annular Slide magazine above the projection window and with a step-by-step drive for the Magazine, each of which has a magazine compartment with an opening in its locking positions in leadership. covers through which opening the slide located in the magazine compartment can be introduced into the projection window by its weight.

It is a slide projector of the type mentioned is known in which the guide forms a cylindrical wall with a horizontal axis above the projection window is arranged and along its deepest surface line one with the projection window having connected opening. A step-by-step drive is used to rotate the magazine provided by which the magazine is set in each case in its locking positions that a magazine compartment is aligned with the opening in the guide. Through this The weight of the slide in the magazine compartment opens up into the projection window insertable.

To prevent you from taking out the well-known magazine its guidance, the slides fall out of the radially outwardly open compartments, a special clamping device consisting of many individual parts is provided. This clamping device not only makes the magazine more expensive, but also makes it easier to insert and the removal of the magazine is very cumbersome, since every magazine change the slides clamped in the magazine before removing the magazine and the clamping device after inserting a magazine into the projector before each projecting must be opened.

The invention is based on the object to provide a projector, in which there is no special clamping device to prevent the slides from falling out must be provided in the magazine that can be produced with as few individual parts as possible is.

This object is achieved according to the invention in that the guide forms a bottom rotatably connected to the magazine, which on the projector in a position can be determined in which the opening is with an insertion opening of the projector.

It is thereby achieved in a surprisingly simple manner that the guide for the magazine at the same time forms part of the magazine, so that when you remove it of the magazine the projector does not open the magazine compartments. It just has to a single empty magazine compartment can be provided, in contrast when removing the Magazine is set by the projector to open the guide. The magazine according to the invention must only consist of two mutually movable parts, namely consist of the magazine itself and the guide.

In an embodiment advantageous because of its simplicity the magazine has two concentrically arranged walls, the spacers formed by slide compartments are connected to one another, and a bottom designed as an annular disc on.

Appropriately, to fix the floor in the position in which the passage coincides with the insertion opening, and to the immovable A releasable locking device is provided for locking the bottom to the magazine. The magazine and the projector can have end locking members in this case release the lock, when the magazine is placed on the projector is. The operator then does not need to ensure that the locking device is closed or opened in the desired manner.

In addition, locking links can be on the projector and the magazine Locking device may be provided, which enables removal of the magazine from the projector Only allow in the magazine's touch-up position. In this way it is prevented that the magazine can be removed from the projector when the opening in the magazine bottom is open one of the slide compartments is aligned, in which a slide can be inserted. This Dia would fall out when the magazine was removed if the magazine was in could be removed from the projector in any position.

For the slide change, which also takes place automatically at certain time intervals a drive mechanism coupled to a motor may be provided be that of the transport device, the displacement device and a device for aligning the magazine to the insertion opening of the projector cyclically and temporally dependent on one another, i.e. after one that is repeated with each change Program, moving. The coupling between the motor and the drive mechanism can be detachable and provided with a control that they after a half and / or a full work cycle.

A transport device which is advantageous because of its simplicity has a latch moving the magazine relative to its bottom and the projector. This pawl can be in two different positions by means of an actuator be pivotable, in which it moves the magazine forwards or backwards. The transport device can also be assigned switching elements that switch them off when the clutch is solved after half a work cycle. This allows the magazine to be moved by hand and placed in any position.

In the following description is an embodiment of the invention explained in detail with reference to the drawings. It shows F i g. 1 a perspective Illustration of an automatic slide projector, FIG. 2 is a partial view of the rear of the projector shown in FIG. 1, FIG. 3 is a top view of the FIG G. 1 shown projector with attached magazine, F i g. 4 shows an illustration of the projector as shown in Fig. 3, but without a magazine, FIG. 5 is a view of the underside of the magazine, F i g. 6 is a side view of the FIG. 5 illustrated magazine, F i g. 7 is a view from below of part of the locking device of the magazine; F i g. 8 is a side view of the FIG. 7 shown part of the locking device of the magazine, F i g. 9 shows an axial section through a retaining ring of the magazine, FIG. 10 a view from below of the projector according to FIG. 1 in which the bottom plate is removed is, F i g. 11 shows an enlarged detail of FIG. 10, fig. 12th a view of the FIG. 11 parts of the projector shown, from the opposite Viewing direction seen, F i g. 13 is a partial view of the FIG. 12 shown Mechanism in the direction of arrow A in F i g. 12 seen being a part the housing wall, a cam and a lever have been omitted for a better overview, F i g. 14 is a view of the FIG. 12 parts shown, in the direction of the arrow A seen in FIG. 12, FIG. 15 is a view of the FIG. 12 illustrated parts, in which the arrow A in FIG. 12 seen in the opposite direction, FIG. 1.6 a Side view of the in F i g. 12 illustrated parts, F i g. 17 is a side view the in F i g. 12 illustrated parts, in the direction of view in F i g. 16 opposite Direction, F i g. 1.8 Views, in the axial direction and perpendicular to it, of a pair of cam disks for the actuation of the lock and the slide shifting device, F i g. 19 of FIG. 18 corresponding views of another pair of cam disks, those for actuating the pressing device and the aligning device of the magazine are provided, F i g. 20 of FIG. 18 corresponding views of a another pair of cams for actuating the transport device and the direction control are provided, F i g. 21 is a side view of the slide shifting device and the cam disk which actuates them, the other devices for the better Overlooked are omitted and the starting position (below) with fully extended Lines and the working position (above) are drawn with dashed lines, F i g. Figure 22 is a side view of the mechanism for the latch and the actuators Cam, the other devices omitted for better visibility and the starting position (open closure) with full lines and the position in which the shutter is closed is drawn with dashed lines are, F i g. 23 is a side view of the mechanism for aligning and locking the Magazine and the cam which actuates it, the other devices for a better overview and the locking position with fully extended Lines that are non-locking position drawn with dashed lines, F i g. 24 is a side view of the projection window, the pressing device and the they actuate the cam, with the other devices for a better overview omitted and the starting position, which is also the working position, with full lines and the position in which the pressure device does not press, are drawn with dashed lines, FIG. 24 a is a view of the FIG. 24 shown projection window and the pressing device in the closed and the open position, perpendicular to the direction of view in FIG. 24 seen F i g. 25 is a side view of the transport device for indexing the magazine and the cam which actuates it, the other devices for the better Overview omitted and the rest position of the device with fully extended Lines that are drawn in the working position with dashed lines, F. i g. 26 shows a section along line 26-26 in FIG. 25, Fig. 27 is a side view of the transport direction control and the cam disk which actuates it, the other devices for better overlooks omitted and the rest position with full lines, the working position drawn with dashed lines are, F i g. 28 is a diagram in which, depending on the position of the cam disks during one revolution the actuation state of all actuated by cam disks Mechanisms is shown in FIG. 29 is a graph of the effective cam height of each Cam disk, depending on the angular position within one revolution, F i g. 30 is a circuit diagram showing the electrical circuit of the projector.

The slide projector according to the invention can either be automatic or can be controlled by hand. The means used for this purpose can essentially such as those described in U.S. Patent 2,969,711. on The slide projector has a container 86 attached to it, in which a number of slides that to be projected can be accommodated. There is also a transport device provided, by means of which the magazine 86 stepwise through each work cycle the automatic or manual control is moved forward or backward to to bring one slide after the other to a projection opening. That at the projection opening The slide is brought under the influence of gravity by means of a slide shifting device brought into a projection position for projecting onto the optical system of the projector is aligned. During one duty cycle of the projector a slide is transported back into the magazine after projection, the slide holder indexed and another slide into the projection position by means of the slide shifting device transported down. The work cycle can be automatic after the first half to be interrupted. This makes it possible to take out slides or make a projection of the slides in any order. In this position a slide transported back into the magazine 86 after the projection by the slide shifting device and remains there. In addition, the transport device is switched off in this position. As a result, the operator can take out the returned slide or move the magazine 86 to any position to project a particular slide, thereby completing the work cycle.

An advantageous embodiment of a slide projector 2 has, as shown in FIG. 1 and 2 show a rectangular, molded housing 4. On the front side of the projector 2 there is a plate 6 with an opening 8 through which a lens mount 10 protrudes. The. Plate 6 also has ventilation slots 12 for the passage of cooling air. On the front side of the projector there is also a door 13 which is pivotably attached to the housing 4 and has a button 14 for opening. Behind this door, as shown in FIG. 10 shows a space 16 for the interruption of the power cord. The door 13 also has ventilation openings 18 and ventilation slots 20 through which the air is blown out of the projector. A U-shaped handle 22, which is used to carry the projector 2, is movably attached to the housing 4.

On the left side of the projector 2, as shown in FIG. 1 shows a button 24 for adjusting the projection sharpness, a button 26 for adjusting the height and a cover 28 which has one of the elements shown in FIG. 10 covers chamber 30 shown in which the optics of the projector is housed. The cover 28 has ventilation slots 29 and is fastened to the housing 4 by means of a screw 32.

The rear of the projector, shown in FIG. 2 is shown a cover plate 34 which is provided with a mark at which the position an adjusting knob 38 can be read. The button 38 has four positions, which are identified on its protruding edge 40. One of these four positions is labeled »Manual«. In this position, the function of the projector manually controlled by the operator. The three other positions can be denoted by numbers that indicate the time intervals at which the slides are changed will. It can e.g. B. set that the change in intervals of 5, 10 or 20 seconds. The back of the projector also has a Plate 42, which is also attached to the housing 4. This plate 42 is with Provide openings for pushbuttons, by means of which the various functions of the The projector. This mode of operation is activated by means of the key 44 of the projector set, taken out the slides, plugged in and in any Order can be projected. This key 44 is marked with »SELECT« labeled. The key 46 is labeled "OFF" and is used for switching on and off Turning off the projector. The button 48, which is labeled »FAN« (»BLOWER«), is used to switch a motor 47, which also drives a fan 49, on and off (Fig. 10). The button 50 controls the supply of power to a projection lamp 51 and is designated with "LOW" ("SCHWACH"), because when you press it, a projection with weaker light occurs, e.g. B. with the light intensity corresponding to a 300 W lamp, which is caused by a resistor 49 in the circuit, as shown in FIG. 30 shows. the Button 52 also controls the projection lamp 51 and is marked with »HIGH« (»STARK«) denotes because when this button is depressed, a greater light intensity is switched on, e.g. B. one that corresponds to a 500 W lamp, what by Short-circuiting said resistor is effected. The key 54 is marked with »REV« ("REVERSE") and controls the movement of a slide magazine 86 in reverse Direction. The key 56 is labeled "FWD" ("FORWARD"). Your activity causes the magazine 86 to move forward. The plate 42 also has in Openings connections 58 and 60 for a connection cable or for a cable of a remote control on.

The upper part of the housing 4 has, as shown in FIG. 3 shows a round, inner edge 62 which is provided with a projection 64 which carries a mark 66. Furthermore, a central spindle 68 protruding upwards with a beveled tip 69 at the upper end and an opening, not shown, into which a spring-loaded wedge 70 protrudes, and an insertion opening 72 (FIG. 4 ), which is aligned with a projection window 74, and an opening 76 through which warm air exits and acts on several slides located in the magazine 86 are provided. The slides are preheated by the warm air so that the deformation that would otherwise occur during the projection occurs beforehand. A protrusion 78 for fixing the magazine 86 protrudes through the opening 72, and a pawl 80 protrudes through an opening 82 in the housing 4. The function and effect of the protrusion 78 and the pawl 80 are described below. Furthermore, the upper part of the housing 4 is provided with an opening through which a locating pin 84 protrudes and also has a number of inserts 85 made of nylon or other supporting parts which support the magazine 86.

The round slide magazine 86 is removable on the spindle 68 within of the edge 62 placed. The magazine 86 is arranged so that when it is in the one or the other direction is moved further, one slide at a time by gravity is introduced into a projection window in a projection position in which it is in the optical axis of the projector. This process is described below described in detail. The magazine 86 is manual or with each work cycle automatically forwards or backwards by the distance between two consecutive ones Slide fans moved on. One cycle of the projector generally includes lifting of a slide from the projection position back into the slide compartment, advancing of the magazine 86 by a slide compartment and the lowering of the next slide by gravity into the projection position.

A slide change can be made by manually depressing the buttons 54 or 56 can be initiated and then carried out automatically. Depending on, whether the button 54 or 56 is depressed, the magazine 86 is reversed or shifted forward. If the pressed key is held down, follow the slide changes in quick succession, making it easy to see through of the slides in the magazine 86 is possible. The slide change can be done in the same Way can be initiated by a switch on the remote control, its circuit diagram in Fig. 30 is shown schematically.

Also by means of the already mentioned button 38 for the choice of one of the adjustable projection times, for example 5, 10 or 20 seconds can, the slide change can be triggered. In doing so, however, the magazine 86 is only forward switched. However, the set projection time can be changed manually of the button 54 or 56 can be bypassed as the mechanisms for manual actuation and the automatic mode of operation, as can be seen from the description below, are independent of each other.

As already mentioned, a mechanism is provided for the removal and projecting the slides in any order, including omitting any slide from the projection, allowed. The operator can do this Move magazine 86 by hand to any position in order to project a specific slide to be able to. The slide compartments are identified by numbers like F i g. 3 shows on the magazine 86 are attached. By this mechanism, it is the operator also possible to project individual slides without using a magazine 86 and in a second way, the slides in the desired order in the magazine 86 classify.

Air flow The fan 49 draws air into the chamber 30 in which the optical system is arranged through the ventilation slots 12 in the plate 6, the ventilation slots 29 in the cover 28 and through the opening 72 in the upper part of the housing 4. The air is heated as it flows past the lamp 51, the lens 90 and the glass 94 and is blown out through a duct, which is formed by plates 111, 113 and by side walls 122, 123, through ventilation slots 20 in the door 13. Part of the heated air is passed through a duct 127 and the opening 76 (FIG. 4) in the upper part of the housing 4 and blows through a part of the magazine 86, whereby the slides located in this part of the magazine 86 are preheated. Slide magazine The structure of the magazine 86 is best shown in FIGS. 1, 3, 5 to 8 and 9 can be seen. It has a cylindrical, cast part with two concentrically arranged, tubular plastic rings 119, 124 (FIG. 3). The ring 119 is bent over at one end to form an inner flange, as a result of which a base plate 131 is formed. In the upper part, the rings 119 and 124 are connected to one another by spacers 117, whereby a number of separate compartments are formed. The exemplary embodiment has 81 compartments with equal spacings. Each spacer 117 is provided with a notch 115 which makes it easier to insert and remove the slides from the compartments. The outer ring 124 has on its outer circumference an edge 126 which is labeled with raised numbers that correspond to the compartment numbers (FIG. 3). Means assigned to the compartments for indexing the magazine downward protrude from the edge 126. In the exemplary embodiment, there are pins 129 (FIG. 6). The compartment "0" is bridged by a bridge 128 which, for a purpose which is explained below, prevents the insertion of a slide into this compartment. All other compartments are open both at the top and at the bottom.

The outer periphery of the base plate 131 of the molded part of the magazine 86 is provided with an annular shoulder 130 on which a serving as a bottom Part of the magazine 86, which is designed as an annular metal disc 132, is rotatably arranged and is held by the heads of three screws 134. The disc 132 has an opening 138 through which the heated air passing through the Opening 76 of the projector exits, flows between the slides and preheats them, when the magazine 86 is placed on the projector 2. The opening 138 is with radially arranged slots 136 provided, which together with the opening 138 a Form passage through which the slides from the magazine 86 into the projection window 74 can happen. It should be noted that a slide that is in compartment "0" would, from the magazine 86 would fall through this passage if the compartment "0" is aligned with this passage. The disk 132 also has an opening 140 which is provided for cooperation with a pin 84, by means of which the disk 132, as described below, is immovable on the projector 2 is lockable.

One shown in FIG. 7 and 8 shown metal bolt 142 has in opposite directions facing lugs 143 and 144 which can be slid in corresponding, not shown recesses in the base plate 131 and which guide the bolt 142 as it moves back and forth in the radial direction. The bolt 142 also has a pair of spring fingers 148, one end of which cooperate with a shoulder 150 on the base plate 1.31 in such a way that the bolt 142 is pressed into the locking position in which the projection 144 'is between two of each other on the inner circumference of the Disk 132 is spaced notches 149, whereby the disk 132 is releasably held in relation to the base plate 131. In this position, the passage formed by slots 136 in disk 132 is aligned with compartment "0". The other ends of the fingers 148 cooperate with stops 1.52 of the base plate 131, by means of which the bolt 142 is stopped when it is moved into the unlocked position.

The base plate 13> i, as in FIG. 5 shows a central opening 154 having on its inner periphery a groove 156 aligned with lugs 143 and 144 and with a notch 158. The notch 158 is provided in the edge 1.26 at the point where the compartment "0" is located. The latch 142 has a bore 160 which is offset from the opening 154 when the latch 142 is in the latched position and is aligned with the opening 154 when the latch 142 is in the unlocked position. When the magazine 86 is placed on the housing 4, the spindle 68 protrudes through the openings 154 and 1.60, and the beveled end 69 of the spindle pushes the latch 142 into the unlocked position. Edge 126 of magazine 86 rests on lug 64 and lock 70 so that the operator can manually rotate magazine 86 until notches 156 and 158 on lug 64 and lock 70 are aligned. With lug 64 and catch 70 engaged with notches 156 and 158, magazine 86 can be lowered until pins 129 contact inserts 85. The magazine is now correctly positioned, with compartment "0" aligned with mark 66. In this position, the pin 84 also protrudes through the opening 140, as a result of which the disc 132 with its notches 136, which form the passage for the slides, is locked immovably aligned with the projection window 74.

When the projector is operated, the disk 132 is not rotated; only the molded part of the magazine 86, which comprises the rings 119, pins 129, the base plate 131 and the spacers 117, is rotated stepwise as a unit so that the slides are fed one after the other to the passage of the disc 132. The disk 132 allows, when it is releasably held by the latch 142, to insert slides in the magazine 86, which are provided with frames made of cardboard, glass, metal, plastic or any other suitable material, provided they are in the spaces between the spacers 117 fit. The slides are held in the compartments by a lid ring 159 (Fig. 9) made of molded plastic or some other suitable material. This cover ring 159 fits into the ring 119 and has a flange 161 on the periphery, which partially covers the compartments and thus prevents the slides from falling out when the magazine is tilted, which can happen during storage or for any other reason. The cover ring 159 has three step-shaped run-up tongues 163 arranged on its circumference, which cooperate with lugs 165 arranged correspondingly on the inner circumference of the ring 119. This lock closes by turning the cover ring 159 in one direction and opens again after turning in the other direction. The cover ring 159 can only be removed from the container 86 in the unlocked position so that the slides can be inserted into the magazine 86 or removed. Drive Mechanism The one shown in FIGS. The drive mechanism visible in FIGS. 10 and 11 has a drive motor 47 which is fastened to a fixed mounting bracket 116 by means of screws, which are not shown and which project through spacers 164. A worm 170 is seated on the motor shaft and drives a gear 172 rotatable on a shaft 174. A gear 176, which is made in one piece with this gear 172, drives a gear 1.78 which is firmly connected to a gear 180. The gears 178 and 180 are rotatably arranged on a stationary spindle 181 which is fastened to a wall 179. The gear 180 drives a gear 182 to which a control wheel 184 is attached. The control wheel 184 and the gear wheel 182 are rotatably mounted on a stationary shaft 186 which is fastened to the wall 179. They are pressed axially in one direction by means of a spring 188 so that a smooth surface 190 of the control wheel 1.84 contacts an arm 192 of an angle lever 194 which can be pivoted about a shaft 196 (FIGS. 11 and 16). The position of the angle lever 194 and thus also the axial position of the control wheel 184 and the gear wheel 182 is controlled by a rectangular cam disk 1.98. The cam disk 198 is rotatably mounted on a pin 200 which is fastened to the wall 179.

The adjustment knob 38 already mentioned is attached to the free end of the pin 200. By turning the knob 38 by hand, one of the four different side surfaces of the cam disk 198 can optionally be pushed under an arm 199 of the angle lever 192 , whereby the control wheel 184 and the gear wheel 182 on the shaft 186 can assume four different positions in the axial direction. The spring 188 presses the gear wheel 182 and the control wheel 184 firmly against the arm 192 and thus acts as a stop which holds the control wheel 184 in the position set by rotating the cam disk 198. The control wheel 184 has four pins 204, 206, 208 and 210 which are evenly spaced around its circumference (FIG. 13). The pins 204 and 208 have a certain, equal length from the side surface of the gear 182 in the direction of the wall 179. The length of the pin 206 is about twice that of the pin 210 about three times as great. These pins on the wheel 184 have the task of interacting with an arm 212 of a lever 214 which is pivotably mounted on a pin 216 fastened to the wall 179. The other end of the lever 214 is connected to an armature plate of an electromagnet 220. A spring 213 pivots the lever 214 such that its rib 215 can be contacted by a free end 222 of a helical clutch spring 224 (FIG. 16).

If one of the pins touches the arm 212 while turning the control wheel 184, so he pivots the lever 214 against the force of the spring 213, which causes that the rib 215 releases the end 222 of the clutch spring 224_. The helical one Clutch spring 224 is formed in a known manner and in the manner already mentioned U.S. Patent 2,969,711. When your free end 222 through the rib 215 is held, the diameter of the spring coils increases, so that the shaft 174 is not driven. If the end 222 is pivoted by the Lever 214, which is effected by switching on the electromagnet 220, is released, so the coils of spring 224 contract, causing shaft 174 to attach to the Motor 47 is coupled. If the coil of the electromagnet 220 is only switched on briefly, which is usually the case when the keys for forward, backward or the keys are operated with the remote control, the coil will be de-energized before the End 222 of the spring has made the first full turn. Since the Hebe1214 by the spring 213 is returned to its original position, starts in this case the rib 215 the end 222 after the first full revolution of the clutch spring 224 which causes a decoupling and the drive of the shaft 186 is interrupted will. When the coil of the electromagnet 220 for more than one turn of the clutch spring 224 remains switched on, the clutch remains for a corresponding number of Revolutions effective. However, the clutch is always when the solenoid 220 is switched off, only released again in their initial position.

The transmission ratio between the various worm gears and gears 170, 172, 176, 178, 180 and 182 is sized so that the control wheel 184 makes a full revolution during any chosen period of time. at The embodiment shown requires a full turn of the control wheel 184 20 Seconds.

When knob 38 is set so that the number "5" is on the mark 36 is aligned, the control wheel 184 is along the shaft 186 by means of the cam 198 shifted so that all four pins 204, 206, 208, and 210 are aligned with arm 212 in Contact. As a result, each of the pens triggers a slide change, and the changes are made every 5 seconds. Is the button 38 with the number Aligned "10" to mark 36, only pins 206 and 210 can see the arm 212 touch, .and since these pins are diametrically offset, take place while the Wheel 184 makes one revolution, two slide changes at two equal intervals of each 10 seconds. If the number "20" is set on button 38, only the pen touches 210 the arm 212, so that during one revolution of the control wheel 184 only one slide change takes place every 20 seconds. If the button 38 is set to "Manual", so none of the pens can touch the arm 212, so that there is no automatic slide change can be done.

On the shaft 174 are a number of cam disks 234, 236, 238, 240, 242 and 24.4 are freely rotatable and therefore each independent of the others can act from each other through spacers 246 and through with the cam disks one-piece pairs of matched ribs and slots 235, 235 '; 237, 237 '; 239, 239 '; 241, 241 '(Figs. 18-20) separately. The cam disks are connected to shaft 174 by a safety coupling 248, such as the F i g.11, 12 and 16 show.

The safety coupling 248 has one attached to the shaft 174 Plastic plate 243 and a U-shaped lever 245 on one of the plate 243 provided bolt 247 is pivotally mounted. Point at one end he has a projection 249 which is arranged so that it has a projection 251 on the Can contact cam disk 234. A spring 253 connects the other end 255 of the Lever 245 with the plate 243. The mode of operation of this arrangement is as follows: The rotation of the shaft 174 is transmitted to the cams via the lug 249 and the Transfer projection 251. However, for some reason it should be one of the cams or the devices operated by them are clamped, the lever 245 pivoted against the force of the spring 253, whereby the approach 249 is below the projection 251 can move away. This means that the two coupling halves are out of reach Intervention.

Each cam disc is scanned by an associated cam sensor, thereby performing a number of functions of the projector in a fixed time sequence, as will be described below. Mechanism for lifting the slides The sliding device designed as a lifting mechanism and shown in FIGS. 11, 12, 17 and 21 has a lever 257 pivotable about a pin 250. The pin 250 is attached to a frame 292 which is integral with the wall 179. Furthermore, the lifting mechanism is provided with a cam sensor 252 which is pressed against the periphery of the cam disk 234 by a spring 254. The spring 254 is arranged between a wall 122 and a shoulder 258 of the lever 257: A lifting plate 260, which is provided with a plastic cap 264, is attached to one end of the lever 257 by means of a screw 262. The cap 264 has beveled edges 266 (Fig. 17) that are provided for a purpose described below. During one cycle of operation, ie one full revolution of the shaft 174 and the cam disk 234, the lever 257 and the cap 264 are in the positions shown in FIG. 21 raised position, shown in dashed lines, a slide being grasped and returned to its compartment in slide magazine 86, and then lowered again, the next slide being slowly brought into the projection position in which it rests against stops, not shown, in projection window 74. Locking Mechanism The one shown in FIGS. 1.1, 1.4 and 22 visible locking mechanism has a pivotable about a pin 270, V-shaped Hebe1268. The pin 270 is attached to a frame 282. One end of the lever 268 is designed as a cam sensor 272, which is pressed against the circumference of the cam disks 236 by means of a spring 274 clamped between the lever 268 and the frame 282. At the other end of the lever 268 there is a laterally protruding pin 278 which protrudes through a slot 280 shown in dashed lines and which is provided for cooperation with not shown slots in a pair of shutter blades 286. The shutter blades 286 are, as shown in FIG. 15 shows, pivotally mounted at points 288 and 290, respectively, and are opened and closed in a known manner. The spring 274 also holds the locking mechanism in the position shown in FIG. 22 starting position shown by solid lines, in which the shutter blades 286 are open. During a working cycle, which corresponds to a full revolution of the cam disk 236, the shutter blades 286 are closed and returned to their starting position at the end of the working cycle. The periphery of the cam plate 236 is designed so that the shutter blades 286 remain closed throughout the time that the lifting mechanism lifts the previously projected slide and lowers the next slide into the projection position. The movement of the slides is therefore not projected. Mechanism for aligning the slide magazine with the slide insertion opening The mechanism for aligning the magazine 86 has an almost straight lever 292 (Figs is provided. The lever 292 also has a guide slot 296 which cooperates with a pin 272 in order to guide the lever 292 as it moves back and forth. A spring 298, which is attached on the one hand to the lever 292 and on the other hand to a pin 300 on the frame 282, presses the cam sensor 294 against the circumference of the cam disk 238. A stop part 302 made of plastic protrudes partially through a slot 304 in the frame 282 and is on the other End 306 of lever 292 attached. Furthermore, this stop part 302 has the already mentioned projection 78, which can engage in the spaces between adjacent transport pins 129, which protrude downward from the edge 126 of the magazine 86, when the lever 292 is moved to and fro. The pins 129 are arranged so that the projection 78, when it engages the space between any two adjacent pins, causes the slide magazine 86 to be moved in neither direction and with a slide slot onto the notches 136 of the passage in FIG the disk 132 is aligned. The passage is aligned with the projection window 74 as described above. When the protrusion 78 is withdrawn from the space between adjacent pins 129, the magazine 86 can be rotated in either direction. Pressure device The in the F i g. 10, 24 and 24 a shown has a lever 310 which is pivotably mounted on a pin 312 arranged on the frame 282. The lever 312 has at one end a cam sensor 314 which is pressed against the circumference of the cam disk 240 by a spring 316 which is clamped between the lever 310 with a pin 300. The other end 318 of the lever 310 contacts an arm 320 of a U-shaped pressing device 322, which is pivotably mounted on a spindle 324 arranged on the projection window 74.

The pressing device 322 has two spaced apart spring fingers 326 provided. A spring 328 connects the pressing device 322 to the projection window 74, whereby the spring fingers 326 are pressed against the projection window 74, when there is no slide in window 74, or against the edges of the slide frame one lowered into the projection window 74 while the projector is at a standstill Slides are pressed. During a working cycle of the projector, the pressing device 322 will be panned when the top edge of a projected slide is on its way back Subject reached again. This lifts the spring fingers 326 off and releases the slide, so that it can finish its way into the compartment. The next slide is then through the Lift mechanism lowered to the projection position. When the slide is in the projection window 74 arrives, the pressing device 322 goes back to its starting position, and the spring fingers 326 press the slide lightly.

The mechanism for moving the magazine. The transport device shown in Figs. 12, 15, 25 and 26, has a plate 330 which is provided with a bent nose 331, the edge of which is designed as a cam sensor 332. A spring 334, which is clamped between a lug 336 * on the plate 330 and the frame 282, presses the cam sensor 332 against the circumference of the cam disk 244. The plate 330 has an elongated slot 340, in FIG. 12 drawn in dashed lines, through which a pin 342 provided on the frame 282 protrudes. A steel washer, not shown, is disposed between frame 282 and plate 330 to provide a low friction surface for movement of plate 330. The opposite end 344 of plate 330 has an opening 346 for a bearing 348 (Fig. 26). An L-shaped arm 350 is disposed on one side of the bearing 348, on the opposite side of which is a plastic lug 80 which has a cylindrical portion 354 which protrudes through an elongated slot 356 in the support frame 282 (FIG. 12). The arm 350 and the nose 80 are connected to one another by means of a screw 360 so that the arm 350, the bearing 348 and the nose 80 are pivotable as a unit in the opening 346.

At the base of a pin 84 provided on frame 282 is a plate 362 mounted pivotably and by means of a screw 361 (FIG. 12) on the frame 282 adjustable attached. The plate 362 is provided with an elongated slot 364, its pages 366 and 368 form cam paths for the nose 80. the Nose 80 has a narrow, pointed rib 370, which with the Pins 129 on slide magazine 86 cooperates and the magazine 86 forwards or backwards moved when the plate 330 is advanced by the cam 244.

As the nose 80 follows the cam 366, forward movement of the plate 330 through the cam 244 causes the rib 370 to enter the space between two adjacent pins 129 and move the magazine 86 forward. However, if the nose 80 follows the cam 368, a forward movement of the plate 330 and the nose 80 causes the rib 370 to enter the space between two adjacent pins 129, but the magazine 86 in the opposite direction, i.e. backwards, is moved. By adjusting the plate 362, the cam tracks 366 and 368 can be arranged so that the rib 370 exactly enters the space between two adjacent pins 129. The rib 370 and the projection 78 act in a timed relationship such that during each work cycle at least one of the two parts is always in such a way that an unintentional manual movement of a part of the slide magazine 86 is prevented and the device is thus prevented from jamming. Mechanism for Adjusting the Pawl The mechanism for adjusting the pawl 352 having tab 80 for forward or reverse shifting is shown in FIGS. 11, 15 and 27 shown. A lever 372 has a downward projection 374, the edge of which is designed as a cam sensor 376. A spring 378 is clamped between the lever 372 and the frame 282, whereby the cam sensor 376 is pressed against the circumference of the cam disk 242. The lever 372 also has an elongated slot 380 through which a pin 342 protrudes. This arrangement serves to guide the back and forth movement of the lever 372. At the other end 382 of the lever 372, a plate 384 is pivotably arranged on a pin 386. The plate 384 has a nose 388 which is provided with a groove 390 for receiving a spring wire 392. One end of the spring wire 392 is attached to the pin 386, the other end protrudes through an opening 394 in the arm 350. The frame 2.82 has a laterally protruding angle 396 in which a pair of separated arcuate slots 398, 399 (FIG. 11, 12) is provided. The plate 384 is provided with a pair of laterally protruding pins 400 and 402 which protrude through the slots 398 and 399, respectively.

A fan-shaped locking plate 404 is between the plate 384 and the angle 396 arranged. It is attached at one end to a bracket 396 Pin 406 pivotally mounted. An electromagnet 408 attached to bracket 396 is provided with an arm 410 which is attached to the plate 404 by means of a rivet 412 is attached. A coil spring 414 surrounding the arm 410 lies between one Shoulder 416 and electromagnet 408 and moves arm 410 and plate 404 in one direction until the locking plate 404 contacts a stop 418. In this Position is the front end 420 of the plate 404, the pin 402 is opposite but outside the trajectory of the stylus 400. As a result, the stylus 402 touches with a forward movement of the lever 372 through the Noek disc 242 initially the End 420 of plate 404 and acts as a pivot point for plate 384. When the Lever 372 is moved further, the plate 384 pivots about the pin 402, during the Pin 400 moves along slide 398. When pivoting the plate 384 The nose 388 moves the spring wire 392, which in turn drives the arm 350 and the pawl 352 with the cam 366 in contact. The latch is in this position 352 so that it causes a step forward.

In order to bring the pawl 352 into the position in which it is reversed switches, the solenoid 408 is turned on, causing the plate 404 to pivot and its end 420 releases the path of the pin 402. At the same time, the train of the pen 400 blocked. So when the lever 372 moves forward the cam 242 of the pin 400 initially in contact with the end 420 of the plate 404 and then acts as a pivot point for plate 384 while the pin 402 moves along slot 399. Pivoting the plate 384 into it Direction causes tab 388 to move spring wire 392 and arm 350 clockwise in a viewing direction according to FIG. 11 moved so that the pawl 352 the curved path 368 touched. In this position, the pawl 352 causes a reverse shift. Duty cycle As already mentioned, this causes the electromagnet to switch on for a short time 220 releasing the clutch spring 224, causing the shaft 174 and those disposed thereon Cams make a full threat. Touched after one revolution has elapsed the end of the spring 222 crosses the rib 215, thereby separating the motor 162 from the shaft 174 will. As soon as the power transmission to the clutch spring 224 is interrupted, hold the cam disks on and remain the cam follower due to the friction of shaft 174 and their springs are in their starting position. If. the cams see in the starting position and the operator briefly presses the electromagnet 220 turns on, the projector starts the following workflow, which the F i G. 28 and 29 show: After the cams look around. have turned about 20 °, become the mechanisms for locking and adjusting the ratchet put into action. As a result, the shutter blades 286 begin to close, and pawl 352 begins to move to the forward or reverse position to push. About 15 ° later, the shutter blades 286 are closed, and the For example, pawl 352 is: n. represents position for moving forward. At this point the lifting mechanism is actuated, which causes the lever 249 is moved upwards, taking a slide back out of the projection window 74 conveyed into the slide magazine 86. About 25 ° later, the plate 330 is actuated to initiate the advance of the magazine 86, 5 ° later the spring fingers 326 of the The pressing device 310 is bent away from the projection window 74. About 30 ° later the lever 292 is actuated to align the magazine position, whereby the Magazine 86 is released for further scolding.

All mechanisms now pause during a rotation of about 60 ° in these stages of their work processes. After this 60 ° this is scolding forward of magazine 86 ends and the pawl adjusting mechanism reverses gradually back to its original position. About 60 ° later the Spemrhebe1292 turns back into its position between two adjacent pins 129 and thereby locks a movement of the magazine 86 so that it remains in the intended position. After another rotation of about 60 °, the lever 249 returns to its starting position back, bringing a slide into the projection position: about 20 ° later the lever for the pressure device 310 returns to its starting position, whereby the animal lowered slide is detected. After another 15 ° turn it turns also return the plate 330 to its original position, and a few degrees later the shutter blades 286 open. Reach shaft 174 and the cams their starting position after about 20 ° further rotation, with which the working cycle closed is.

Projection in Any Order The operator may wish to show a specific slide outside of the sequence provided in the slide magazine 86 or to want to remove a single slide from your magazine 86. The mechanism provided for this is shown in FIGS. 12, 13, 14 and 16 and has a lever 422, at one end of which the button 44 is provided and the other end of which is pivotably mounted on a pin 200. The lever 422 has an arm 424 that has one on the spindle. 181 pivotally mounted angle lever 416 touches and moves. The bell crank 426 can be moved by the button 44 to an operative position in which it causes an arm 428 to contact the lever 214 and pivot it about the pin 216, whereby the clutch spring 224 is released. The angle lever 426 also has a notch with a stop 430 which, when the angle lever 426 is in the working position, prevents the movement of the spring end 222 after half a working cycle and thus prevents the working cycle from continuing. Another arm 432 of the toggle lever 426 touches one end of a lever 434 which is pivotably mounted on a pin 436 provided on the frame 282. A spring 438, which is clamped between the lever 434 and a projection 440 of the frame 282, presses the end of the lever 434 against the arm 432, so that the angle lever 426 is held in its rest position. The other end of the lever 434 has a pin 442 which, when the lever 434 is pivoted into its working position by the movement of the angle lever 426, touches an edge 444 of the plate 330 and. moves it in the lateral direction towards an adjacent hub 443 and brings it into contact with a stop disk 447. The cam sensor 332 is thereby lifted off the cam disk 244. As a result, after half a working cycle of the projector, the pawl 352 remains in its rest position in which it does not touch the pins 129 of the magazine 86. Accordingly, the lever 257 and its cap 264 are in their uppermost position after the end of half the working cycle, after they have just transported the previously projected slide from the projection position back into the compartment in the slide magazine 86. In this position, the projection 78 is also withdrawn from its position between the pins 129 of the magazine 86. The same is true for the pawl 352, as already described. As a result, as long as the button 44 is kept depressed, the projector is held in the position it assumes after half a working cycle has elapsed, and the operator can remove the previously projected slide or rotate the magazine 86 by hand into the position in which the Diafach is aligned with the desired number on the projection window.

In the position it assumes after half the working cycle, the cap 264 protrudes slightly above the level of the disk 132 (FIG. 21), so that the edges 266 of the cap 264 raise the slide slightly above the level of the other slides . As a result, the operator can clearly see which slide is aligned with the mark 66 and thus also with the slide passage. This arrangement also prevents the bottom edges of the slide from catching on the notches 136 of the passageway. As soon as the operator has rotated the magazine 86 so that the desired slide or compartment with the desired number is aligned with the mark 66 and the slide passage, the button 44 is released, whereby the clutch spring 224 is released, so that the shaft 174 is powered again and thus the projector ends the working cycle.

During the second half of the process, the desired slide or, if the slide has not been moved, the slide inserted in the tray into the projection window 74, where it is pressed lightly by the spring fingers 326, and projected. While the projector is in the position it would after half a working cycle occupies, the shutter blades are closed so that no light is projected. When the button 44 is released, the feeler 332 also returns as a result of the spring 334 exerted pull back from the adjacent hub 443 into the position, in which it is aligned with the cam disk 244.

The mechanism that enables the projector to project in any order stops after half a working cycle, can also be used for single Projecting slides with magazine 86 removed from the projector. There is also the operator manually pushes the slide into the projection window 74 into the projection position. After the projection, the operator presses one buttons 44, 54 or 56. This causes the projector to start up, the lifting plate 260 is raised and the slide is ejected. This operating mode is permitted also allows the operator to check the slides before placing them in the magazine will. Preferably, however, the slides are checked in such a way that you have a magazine 86 on the projector, insert a slide into the first compartment and the projector then starts to project the slide. Is the slide inserted the wrong way round? or defective, the button 44 is depressed, placing the slide in the compartment returned and turned over or removed can. is however, if the slide is satisfactory, the next slide is inserted into the second compartment. The projector is then put into operation for projection. This process is repeated then until all slides are arranged.

Since the slide magazine 86 is round, the projector is suitable for continuous projection and repetitions. The operator only has to set the button 38 to the desired projection time of 5, 10 or 20 seconds, whereby a continuous projection is already achieved. If the operator wishes to show 81 slides or a title slide or to insert a piece of thin cardboard to block the light before or after all slide magazines have been projected, the slide, title slide or piece of cardboard must be inserted into the projection window 74 and pushed into the projection position before the magazine 86 is placed on the projector. During operation of the projector, the slide, the title slide or the piece of cardboard is in compartment no. 0, the locked compartment of the magazine 86 and is lowered again into the projection window 74 when the magazine reaches its starting position. The slide, title slide or piece of cardboard remains in the projection window 74 when the magazine is removed. Manual triggering of the magazine As described above, the notches 158 and 156, when the magazine is correctly placed, are on the projection 64 and the spindle wedge 70, respectively aligned. After the first working cycle, the operator can no longer remove the magazine 86 from the projector 2 because the edge 126 and the projection 64 and the spindle wedge 70 and the inner circumference 154 of the base plate 131 are in engagement. If the slide changing mechanism should now be disturbed for any reason, the operator can remove the magazine 86 from the projector 2 by using a lever 446, which is shown in FIG. 4 drawn in dashed lines - is actuated. This is pivotably mounted at point 448 on the lower side of the housing 4 and is provided with a handle 450 which protrudes through a slot (not shown) in the side of the housing 4 and is accessible for manual operation after opening the door 28 of the storage compartment . The spindle wedge 70 is part of the other end -'of the lever 446. A spring 453 arranged between the lever 446 and the housing 4 presses the wedge outwards into its rest position. When the magazine 86 has been removed in this way, the lock 142 on the base plate 131 of the magazine 86 is no longer in engagement with the notches 149 in the disc 132, which is therefore no longer locked. The operator must now turn the disk 132 ″ until it is locked again with the base plate 131. The operator must then remove the damaged slide or the foreign body that has disrupted the slide changing mechanism and then remove the magazine 86 again on the projector 2.

A circuit diagram of the projector described in the exemplary embodiment is shown in FIG. 30 shown. The motor 47, which drives the drive mechanism and the fan 49, and the projection lamp 51, which is preceded by the resistor 49, are in parallel branches of a circuit having the mains switch 46, which can be connected to the mains by means of a mains plug 53 . The three switches 48, 50, 52 are connected in series with the mains switch 46, of which the one shown in FIG. 30, the switch 48 marked with "blower" only closes the circuit of the motor 47 when actuated, while the switch 50 marked with "weak" closes the circuit of the motor 47 and the branch consisting of the lamp 51 and the series resistor 49. The switch 52 marked "strong" connects when the power switch 46 is closed, the. Motor 47 and lamp 51 directly to mains plug 53.

A coil coupled to the motor winding serves as the voltage source for the control circuits, which are electrically isolated from the motor and lamp circuits. A first control circuit has the actuating electromagnet 220, a second the electromagnet 408 which switches the transport device of the magazine 86 to “reverse”. The first control circuit can be closed by means of the switch 56 marked with "forward" or a switch 56 'of a remote control lying parallel to it, since both switches 56 and 56' are in series with the actuation magnet 220. The switch 54 marked "backwards" and a switch 54 'of the remote control connected in parallel to it are in series with both the actuating magnet 220 and the switching magnet 408. The actuation of the switch 54 or 54 'therefore causes the projection of the slides in the reverse order, since the magazine 86 is moved backwards.

In a third control circuit, a motor 110 is switched to adjust the focus of the optical system in series with two parallel branches, in which a switch 57 and 5, 7 and a rectifier are 501 and 501 '. The forward direction of the two rectifiers 501 and 501 ' is selected so that when the switch 57 is closed, the motor 110 runs forward, and when the switch 57' closes, it runs backwards. The remote control is connected to the projector by means of a plug 502 and the socket 60.

Claims (23)

Claims: 1. Slide projector with a guide for the rotatable Storage, a ring-shaped slide magazine above the projection window and with a step-by-step drive for the magazine, each of which is in its latching position Magazine compartment with an opening in the guide covers through which opening the in The slide located in the magazine compartment can be inserted into the projection window due to its weight is, characterized in that the guide is rotatable with the magazine (86) connected bottom (132) forms, which can be locked in one position on the projector is, in which the opening (136, 138) with an insertion opening (72) of the projector covers. 2. Slide projector according to claim 1, characterized in that for moving of the magazine (86) by means of the drive on the magazine (86) pins at a distance from one another (129) are arranged. 3. Slide projector according to claim 2, characterized in that that the magazine (86) has two concentrically arranged walls (119, 124) which with spacers forming slide compartments (117) connected with each other are, and that the bottom (132) of the magazine (86) is designed as an annular disc (132) is. 4. Slide projector according to claim 3, characterized in that the inner wall (119) is provided with a base plate (131) on which the base (132) is displaceable is stored. 5. Slide projector according to one of claims 2 to 4, characterized in that that for fixing the bottom (132) in that position in which the opening (136, 138) with the insertion opening (72) covers, and for the immovable locking of the bottom (132) with the magazine (86) a releasable locking device is provided. 6. Slide projector according to claim 5, characterized in that the locking device on one of the two magazine parts (132) has a slot (149) and on the other magazine part (131) a displaceable, by the force of a spring (148) in engagement therewith Has slot (149) held projection (144 '). 7. Slide projector according to claim 6, characterized in that the locking device. a connecting plate (142) which mixes noses (143, 144), one of which (144) has the projection (144 '), furthermore with a leaf spring (148), the projection (144 ') in engagement with the slot (149) on the inner edge of the bottom (132), and is provided with an opening (160) which depends on whether the projection (144 ') is in or out of engagement with the slot (149) an opening (154) provided in the base plate (131) or moved onto it is aligned. B. Slide projector according to one of Claims 5 to 7, characterized in that that the magazine (86) and the projector have end locking members (68, 69, 142, 160), the lock between the magazine (86) and loosen its bottom (132). 9. Slide projector according to claim 8, characterized in that that the end locking members have a cam (69) arranged on the projector and a resilient one have on this plate (142) which can be placed. 10. Slide projector according to one of claims 1 to 9, characterized in that the projector and the magazine (86) locking members (64, 74, 126, 131) of a locking device are provided, which enable removal of the magazine (86) from the projector only allow in the touch-down position. 11. Slide projector according to claim 10, characterized in that as locking members arranged on the projector projections (64, 70) are provided, which by incisions (136, 156) in edges (126, 131) of the magazine (86) pass through when this is on is placed on the projector, and which rest on these edges (126, 131) when the magazine (86) has been moved out of the placement position. 12. Slide projector after Claim 11, characterized in that for unlocking the locking device an unlocking member (446, 448, 450) is arranged on the projector, by means of which one of the projections (70) can be pulled off from the edge (131) assigned to it. 13th Slide projector according to one of Claims 1 to 12, characterized in that a a drive mechanism (234 to 244) coupled to a motor (47) is provided, the step-by-step drive, a shifting device for returning the slide into the magazine and a device for aligning the magazine (86) with the insertion opening (72) of the projector cyclically and temporally dependent on each other. 14. Slide projector according to claim 13, characterized in that between the motor (47) and the drive mechanism (234 to 244) a releasable coupling (224) is provided. 15. Slide projector according to Claim 14, characterized in that a controller (220, 215, 214, 213, 184, 422, 426, 44) for releasing the coupling (224) after a half and / or a full Duty cycle is provided. 16. Slide projector according to one of claims 2 to 15, characterized in that the step-by-step drive a relative to the magazine (86) has pawl (352) moving to its bottom (132) and the projector. 17. Slide projector according to claim 16, characterized in that the pawl (352) forwards and backwards slidable and pivotable in two positions, in which they are when forward and Moving backwards the magazine (86) moved forwards or backwards, arranged on the projector is. 18. Slide projector according to claim 17, characterized in that for pivoting the pawl (352) control parts and an actuating glired (408) are provided. 19. Slide projector according to claim 18, characterized in that the control parts have a slide (372, 382) which can be moved to and fro, a pivoting part (384) which is mounted pivotably on this and is provided with spaced apart projections (400, 402), one at its ends with the pawl (352) or the slide (372, 382) and in between with the pivoting part (384) connected spring wire (392) and a pivotable mounted on the projector, in two different working positions when moving the slide (372, 382) have a locking part (404) causing the pivoting part (384) to pivot in opposite directions. 20. Slide projector according to claim 19, characterized in that the locking part (404) has a fan-shaped end, which in the one working position in the path of movement of one projection (400) and in the other working position in the path of movement of the other projection (402) is pivoted and that by means of an electromagnet (408) against the force a spring (414) can be pivoted from one working position into the other. 21. Slide projector according to one of claims 14 to 20, characterized in that the stepwise drive switching elements (434, 426, 214, 44) are assigned to these switch off when the clutch (224) is released after half a working cycle. 22. Slide projector according to claim 21, characterized in that the switching elements one that can be pushed back and forth by the force of a spring (334) against a Kurte (244) pressed lever (330, 332) of the stepwise drive zugeördnet are whose contact finite the curve (244) by the switching elements to switch off of the drive is interrupted. 23. Slide projector according to claim 2, 2, characterized in that the support veins have a pivotably mounted type (434) provided with a projection (442); in the middle of which the lever (330, 332) can be displaced transversely to the tewegurigsrichtung caused by the curve (244). Documents considered: German Auslegeschrift No. 1 047 475: