US1849668A - Moving picture machine - Google Patents

Description

March 15, 1932. D; E GILMORE 1,849,668

MOVING PICTURE MACHINE Filed May 20, 1929 5 Sheets-Sheet l March 15, 1932. D G1LMORE 1,84Sfi6g MOVING PICTURE MACHINE Filed May 20, 19529 5 Sheets-Sheet 2 Mare}! 1932- D. E. GILMORE 1,849,66

MOVING PICTURE MACHINE Filed May 20, 1929 5 Sheets-Sheet 3 a V 756 IE4 17a v it? E: 61' 711 are MOVING PICTURE MACHINE Filed May 20, 1929 5 Sheets-Sheet 4 QVnUan 237% March 15,1932. D. E. GILMORE MOVING PICTURE MACHINE Filed May 20, 1929 5 sheets sheet 5 Patented Mar. 1 1932 UNITED STATES PATENT OFFICE DAVID E. GILMORE, OF CHICAGO, ILLINOIS, ABSIGNOB TO HELIOS CORPORATION, OF

. CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE MOVING PICTURE MACHINE Application filed May 20,

My invention relates generally to moving picture machines and has to do more particularly with devices for projecting upon a screen, or the like, a rapid succession of images from a moving picture film.

Recent developments in the combination of moving pictures and sound, that is, so-called talking-moving pictures, have made severe the demand upon moving picture projection apparatus, and it is a general object of my invention to provide apparatus which will be especially adapted for use in the projection of talking or sound pictures.

A. particular object of my invention is to provide projection apparatus which will maintain the film substantially taut at all times where it is associated with the light, so that a clear and sharp image will be projected at all times without fuzziness, indefiniteness, or portions out of focus.

A. further object is to provide driving mechanismfor apparatus of the class referred to which will be so arranged as to operate with a minimum of wear and noise.

A still further object is to provide means for adjusting relative to each other, the cams which provide intermittent movement to the film in order that such cams and the sprocket drums carrying the film and actuated by the cams may be 1n perfect synchronization.

Still another object is to provide such a device in whichthe intermittent driving unit may be quickly and easily replaced, as a unit or repaired.

Another object is to provide means for gauging the length of film between the light and sound apertures so as to maintain a fixed length of film between such points, in order that the sound and pictures may be started and maintained in perfect synchronization.

Still a further ob ect is to provide a new and improved star wheel for mechanism of the class referred to.

Still another object is to provide means for masking a sound device on J. film at the aperture plate, without blurring the edge of the film.

Still a further object is: to provide a new and improved framing device whereby all machines may be framed similarly and a 1929. Serial no: 364,564.

double image of the picture thus prevented. Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in'the art from the disclosure herein given.

To this end my invention consists in the novel construction, arrangement and com-- bination of parts herein shown and described,

and more particularly pointed out in the claims.

In the drawings, wherein like reference Fig. 3 .is a sectional View taken substantially on the line 33 of Fig. 2;

Fig. 4 is a sectional view taken substantially on the line 44 of Fig.3;

Fig. 5 is a sectional view taken substantially on the line. 55 of Fig. 3;

Fig. 6 is a fragmentary detailed elevational view of a pair of spools forming a feature of my invention;

Fig. 7 is a sectional view taken substantially on the line 7-7 of Fig. 2;

Fig. 8 is a sectional view taken substantially on the line 8-8 of Fig. ,7

Fig. 9 is a fragmentary elevational view showing means for adjusting the main housing relative to the power transmitting mechanism;

Fig. 10 is a detailed plan elevation on an enlarged scale of a star wheel comprising a feature of the invention;

Fig. 11 is a sectional view taken on the line 11- 11 of Fig. 10;

means for adjusting the shutter taken on line 1212 of Fig. 7 and Fig. 13 is a sectional view of a sound maskparatus embodying my invention, and which may be referred to as the main housing. This casing comprises a top wall 11, a bottom wall 12, a front wall 13, a rear wall 14 having a panel 14a hinged as at 14?) (Fig. 4), a side wall 15 hinged to the front wall as at 15a (Fig. 4), and a side wall 16. The casing 10 may be substantially similar to that of the apparatus described and claimed in the patent to Proska No. 1,748,779 issued Mar. 11, 1930. Arranged on the top wall 11 of the casing is a suitable bracket for supporting a reel of moving picture film, this bracket carrying a plurality of rotatably journaled rollers 21 arranged in pairs for guiding the film from a reel (not shown) into the casing 10, the top wall 11 being apertu'red as at 22 for the passage of film.

Preferably formed integrally with the front wall 13 is a cylindrical boss 25 which is adapted to house a plurality of lenses (not shown) in a manner well known in the art, and a focusing lever 26 is provided for moving the lenses within the casing, in a well known manner.

Hingedly mounted on the wall 14 of the casing is a door 27 and pivotally mounted in a bracket 28 secured to the outer surface of the door 27 is a latch member 30. This latch member is yieldingly urged by a spring 31 into a position where it will engage a keeper 33 formed on the wall 14. It will be readily apparent that by depressing the end of the latch member 30, the door 27 may be swung outwardly on its hinges.

Secured to the wall 16 of the casing 10 adjacent the lower portion. thereof and insetwith respect thereto, is a panel 35, and secured to the panel 35 1s a gear box.37, a reenforcing or vibration-reducing member 38 being interposed between the gear box and the panel 35, The gear box has a pair of lateral flanges 34 having arcuate slots 36 through which extend bolts 39 securing the box 37 to the casing 10 (see Fig. 9). A main drive shaft leading from any suitable source of power (not shown), such as an electric motoror the like, transmits motion to the gear boxand thence to the apparatus housed-within the casing 10. The gear box 37 comprises a plurality of walls connected together with fluid-tight joints so that the mechanism housed within this gear box may be substantially submerged in oil, or bther lubricant and may continuallyoperate under such conditions in order that noise and wear may be reducedto a minimum.

' Mounted'on the end of the driveshaft 40 is a worm wheel 42 which meslies with a worm 43 carried byia shaft 45. It may be noted here. that the casing 10 and parts carried thereby may be angularly "adjusted about the tween casing 10 and the gear box 37 through the arcuate slots 36. As seen best in'Fig. 8,

the shaft 45 is preferably formed in two sections so as to facilitate assembling and demounting of the apparatus and has secured to its other end, a bevelgear 47. The gear 47 meshes-with a similar bevel gear 48 mounted on a substantially vertical shaft 50, which will-be called the main shaft. A suitable fluid-tight casing 52 isprovided adjacent the lower portion of the casing 10 for housing various portions of the driving mechanism, in order that such mechanism-may be submerged in oil'or other lubricant while in motion so as to reduce noise and wear. A suitable fluidtight bearing member 53, journals the shaft 50 in the upper wall of the casing'52. This shaft, as best seen in Fig. 3, is preferably formed in a plurality of sections, connected by a coupling 54, in order that the parts above the casing 52 may be removed as a unit, if desired.

Secured to the shaft 50 adjacent the lower portion thereof is a gear 55' meshing with a similar gear 56 mounted on an idler shaft 57, this idler shaft being carried by a bracket 58 slidable on a pin 58' and so journaled in a suitable bearing member provided in the bottom wall of the casing 52 as to be vertically slidable. Secured to the shaft 57 is a spiral gear 59meshing with a similar gear 60 mounted on a shaft 61. parallel to the shaft 57 and 50 and is also journale in the casing 52 carries a gear 62 which meshes with a similar gear 63 secured to a shaft 65. The shaft 65 is also parallel The shaft 61 which is to the shaft 50 and is rotatably journaled at similar gear 67 secured to one end of a shaft 68. The shaft 68 is rotatably journaled in a bearing member 69 projecting from and preferably integral with the wall 13 of the casing and this shaft carries a disc shutter 7 0', which may be of an suitable type, well known in the art, or o the type disclosed in the copending application above referred to.

Secured to the shaft 65' is a governor 72, which may be of any suitable type for controlling ,the rotative speed of the shutter 70. If desired, the governor 72 may be operatively connected to suitable means indicated at 73 (Fig. 1) for interposing a fire screen between the source of light and the film which is being fed through the machine when the speedof such film is for any reason reduced below a predetermined minimum. Such apparatus is disclosed in the copending appli- 6 one through a vertical partition member 78 and carries on one end thereof, a sheave or pulley 79 (Fig. 2) which is ada ted to operate, by means of a belt, or the li e, a rewinding reel (not shown). At its oppositeend, the shaft 77 carries a take-up sprocket drum 81. A blade 83 (Fig. 1) pivotally secured to partition member 78 has an edge normall hearing against the sprocket wheel 81 for t e purpose of peeling off the end of a strip of film which may stick to the drum. A spring (not shown) may be provided for resiliently urging the blade 83 into contact with the drum 81. Cooperating with the drum 81 is a grooved roller 85 rotatably mounted on an arm 87 (Fig. 2) which is pivotally mounted on the partition member 7 8 as indicated at 88. A. stop 89 is formed on the arm 87 opposite the pivot 88 for limiting its movement in one direction and a coiled spring 90 normally bears against the arm 87 for retaining the rollers 85 in cooperative relationship to the drum 81, so as to'bear against a strip of film passing between the rollers 85 and drum 81. A screw 92 threaded into the wall 14 of the casing 10 serves as an adjustable stop for limiting the rotation of the arm 87 about its pivot away from drum 81. An arm. 93 is pivotally secured to the partition member 17 8 fixed to a definite length as accurately as possible, in order to obtain as nearly perfect synchronization of sound and picture as possible. By rotating the arm 87 to the left (Fig. 1) until it abuts against the screw 92 and the film then arranged taut between the rollers 85 and the sprocket drum 81, obviously a loop 97 of film may be formed between the picture projecting apparatus to be described and t e take-ofi sprocket 81,

which loop is absolutely fixed in length. It

is apparent that the length of the loop may be adjusted within certain limits by rotation of the screw 92, which. serves as a stop for the arm 87. Of course, the roller 85 also cooperates with the sprocket drum 81 for retaining the film thereon when the machine is operating. Furthermore, by rotation of the arm 93, carrying the guide rollers and 95', about the pivot 94, the length of film between the take-01f sprocket 81and the sound reproducing mechanism (not shown) may be varied within certain limitsf However, once the screw 92 and arm 93 have been adjusted, the length of film between the light projecting mechanism and the sound reproducing mechanism may be absolutely fixe (Fig. 2) for the introduction of oil.

Rotatably journaled iii the rear wall 14 of the casing 10 is a shaft 100 carrylng at one end thereof outside of the casing 10 a manipulating knob 101. This shaft 100 ex arm formed on the upper extremity of the shaft 57. (See Figs. 7 and 12.)

It will be obvious that rotation of the knob 101 by an operator results in vertically moving the shaft 57, together with the spiral gear 59 carried thereby, either in an up or down direction, according to the direction of rotation of the knob 101. Such longitudinal movement of the gear 59 will ,result in rotation of the spiral gear 60 meshing therewith, and such rotation of the gear 60 will be transmitted by the mechanism best seen in Fig. 3 to the shutter 70. By this means the shutter may be adjusted so as to be in perfect synchronism with the film.

ferring now to Fig. 3, it will be seen that the shaft 50, which may be called the main shaft, has preferably formed integrally on its upper end an enlarged portion her 118 secured in the top wall 11 of casing 10, as by a screw-formed end 119. The shaft 50 extends through a longitudinal sleeve 120 having a laterally extending annular flange having a keyway 116 thereinfand rotatably engaging the portion 115 is a bearing mem- 121 at the lower end thereof which is seated in a suitable cup-like bearing member 122 journaling the shaft 50 and disposed in a' casing 123. The casing 123 is closed at the top thereof by means of asuitable cap-like member 124 which has a substantially central opening 125 therein. Annular centering devices 126 substantially similar to the centering arrangement disclosed on the copending application above referred to are provided'in the upper portion of the cup-like member 124. Thecasing 123substantially incloses the film feeding mechanism, to be described, and has'in a side wall thereof an aperture 127 closed' by a screw plug 128 Disposed in the cuplike bearing member 122 and seated on the annular flange 121 formed on the lowerportion of the sleeve 120 is a ball bearing 132. ,Seated above the upper race of the ball bearing 132 and journaling the sleeve 120 is a sleeve like bearing member 135, which engages adjacent its upper extremity the lowerrace of a ball bearing 136. The ball bearing 136 is arranged with its upper race secured to the caplike member 124 and with its lower race disposed in a worm 138.

The worm 138 is rotatably mounted on the sleeve 135 and-is provided with a key 139 extending through the sleeve 135 and-slidably engaging the keyway 116 in the enlarged portion 115 of the shaft 50. The worm 138 "art that each rotation of the cam 140 produces a rotation of 90 in the star wheel 145. The cam 140 is pinned by means of a stud 147 or the like, to a spool like member 148 rotatably.

mounted on sleeve 135. Arranged on the sleeve 135 above the ball bearing 132 and having a flange 149 engageable with the upper race thereof is a cam 150 substantially similar to the cam 140 which is in operative relationship to a star wheel 151 substantially similar to the star wheel 145. The cam 150' is pinned to a spool like member 148'. similar to spool 148 by means of a stud 147' or the like.

It may be noted at this point that, in" the operation of the device, the shaft 50' carries with it'the worm 138 and the sleeve 135, to which it is keyed by the member 139, the cams 140 and 150, and the spools 148 and 148', the sleeve 120 remaining substantially fixed against rotation. By means of this arrangement, the entire mechanism carried within the casing 123 by theshaft 50, or the shaft itself, may be quickly and easily replaced.

The spools 148 and 148' are adjustably connected together by the following means; Referring now to Figs. 5 and 6, it will be seen that each of the spools 148 and 148 comprises a hubportion 155 and a pair of laterally extending annular flanges 156 and- 156', the flanges 156 of the two spools being in engagement with each other. The-flange 156 of the lowermost spool 155 has a Inrality of screw threaded apertures 156a w ile the flange 156 of theuppermost spool has a plurality of arcuate slots 157, the slots being in registry. with the apertures 156a and screws 158 are threaded through the slots 157 into the apertures 156a of the lowermost spool with their heads normally engaging the flange 156 of the uppermost spool 155 so as to lock the two spools in substantially fixed relationship. Each of the flanges 156' is notched as at 160, the notches being preferably V-sha-ped andarranged in diametrically opposite pairs on each flange and the notches of eachof the two flanges being substantially in registry with each other.

It will be readily apparent that, in order to change the angular relationship between the two spools 148 and 148, it is necessary merely to loosen the screws 158 by means of a wrench or other suitable tool' and then insert a tool such as a screw driver or the like into the notches 160 and pry the two spools into the desired angular relationship. The screws 1581113) then be tightened up and the spools, together with the cams 140 and 150 which are pinned to the respective spools will be substantially fixed relative to each other. By this means the cams and star wheels andthe film feeding mechanism controlled thereby may be adjusted in a perfect synchronism, so that the star wheels will rotate simultaneously and the film may be maintained taut at all times.

A plate 162 (Fig. 5) secured to the casing 123 by means of screws or other suitable means is provided, whereby access may be had to theinterior of the casing 123 for making the adjustment just described and for other purposes.

The star wheels 145 and 151 may be of any suitable type, but are preferably of an improved design best shown in Figs. 10 and 11. Each of the star wheels compnises a shaft 165 with a screw threaded bore 164 in one end thereof and having preferably integral therewith hollow radial arms 166. Rotatably arranged in each of the arms 166 is a roller bearing member 167, each of which, best shown in Fig. 11, is provided with a shoulder 168 abutting against the end of its cooperating radial arm 166. An annular groove 169 is formed on each of the members 167 adjacent the inner extremity thereof and loosely engaging each of the grooves 169 of these members so as to permit rotation thereof is an an-- milar ring 170 extending through a suitable aperture 173 formed on the face of the star wheel and is secured in position by means of a screw 175 threaded into bore 164 of the shaft 165 of the star wheel.

It will be obvious that the members 167, being rotatable, reduce the friction to a minimum in their contact with the cam. Furthermore, when the members 167 become worn after long usage, it merely becomes necessary to remove them from the star wheel by loosening the screw 17 5 and withdrawing the ring 170 which secures them and then replacing the worn out pins with new ones. This obviously represents a considerable saving over star wheels which must be entirely replaced when their cam engaging members become worn.

Meshing with the worm 138 (Fig. 3) is a worm wheel 180 secured on a shaft 181 which is rotatably mounted in the casing 123. Se-

cured to the other end of the shaft 181 outside of the casing 123 (Figs. 1 and 2) is a feed sprocket drum 183 which is aligned'with the tatably mountedon an arm 186 which is carried by a bracket 187 mounted on a wall of spring (not shown) is provided for retainin this lever in its extreme position. A knurle' knob 188 coaxial with the r llers 185 is provided for adjusting these r llers in relation to the sprocket drum 183. Such an arrangement for mounting the sprocket drums and rollers will be readily apparent to one skilled in the art and it is not considered necessary to show the same in detail. Reference may again be made to the copending application above noted.

The star wheels 145 and 151 (Fig. 4) are mounted on shafts 190 and 190' which are journaled in sleeves 192 disposed in the casing 123 and have secured to their opposite ends outside the casing 123 sprocket drums 191 and 191. Cooperating with the sprocket drum 191 (Figs. 1 and 2) is a pair of grooved rollers 193 rotatably mounted on a bracket 195 which is pivoted to the casing 123 as at 196. A knurled knob 198 is provided for manipulating the rollers 193 about the pivot 196 and a spring (not shown) is provided for maintainin the bracket 195 in its extreme positions a out its pivot 196. Similarly, a pair of grooved rollers 199 cooperate with the sprocket drum 191', the rollers 199 being rotatably carriedby a bracket 200 which is pivoted to the casing 123 as at 201: The arrangement of the grooved rollers 199 is substantially similar to that of the rollers 193, a knurled knob 202 being provided formanipulating the bracket 200. j

A rectangular stripper plate 205 having a blade portion 206 adapted to engage the sprocket drum 191' for stripping film therefrom is pivotally secured to the casing 123 as at 207. A screw 208 engageable in a slot 209 formedin the stripper plate 205 is provided .for adjusting the'stripper in fixed position.

A drum 210 aligned with the sprocket drum 191 is rotatably carried by a bracket 211 t which is secured to the lens holder'25.

Cooperating with thedrum 210 is a pair of flat rollers 212 pivotally mounted on a bracket 213 which is secured to tl" casing 123 in a manner similar to the grooved rollers previously described. The rollers 212 may be manipulated about their pivot 214 by means of a knurled knob 215. A helical spring-216 se-.

cured to the casing 123 by screws 217 or other suitable means is provided for maintaining a tension on the arm 213 carrying the rollers 212.

The function ofthe drum 210 and rollers 212 is as follows: It .is impossible for the length of film between sprocket drums 191 and 191 to remain absolutely fixed, inasmuch as patches in the film will cause a constant variation. However, once the film has beenarranged taut between drum 210 and sprocket drum 191', the rollers 212 will keep it so, due to their resilient mounting, whereby they will maintain the film tightly over the drum 210;

Secured to the inside of the wall 15 of the casing 10 (Figs. 1 and 2) isa bracket 220 having a slot therein in which is slidable a plate 221. The plate 221 is so arranged as to be slidable across an aperture 223 of a masking plate 225 secured to the lens housing.

25, the aperture 223 being in registry with a source of light (not shown) and with the lenses contained in the housing 25. A suitable aperture is provided in the plate 221 for a pin. 227 whereby the plate 221 may be adjusted in various positions with respect to the aperture 223. The object of this arrangement is to mask out the sound line of a talking film which is being projected upon a screen. If the sound line were not masked out, a wavy line of light would be projected on the screen alongside of the picture. When, however, an ordinary film without sound is being projected, the plate 221 may be withdrawn to the side of the aperture 223 and the entire width of the film may thus be pro jected. It will be noted that the plate 221 lies in precisely the same plane as the aperture plate 225, with the result that a sharp focus is maintained on all sides of the picture being projected.

The casing 123 is slidably journaled on a pair of vertically disposed pins 230 and 231 (Figs. 4 and 5) and maybe raised and lowered by means comprising a lever 233 which is secured to a shaft 234 rotatably journaled in the wall 13 of the casing 10. The shaft 234 carries adjacent its inner extremity a crank 235 on the free end of which is rotatably journaled a cylindrical bearin member 236. The bearing member 236 is slidably disposed in a groove'237 formed in the outer wall of the casing 123.

It will be readily apparent that rotation of the lever 233 about its pivot 234' results in vertical movement of the casin 123 and all of theparts carried thereby, wlth the result that the picture of the film carried by the various sprocket drums may be properly centered or masked with respect to the aperture plate 225, thus preventing proper image on the screen.

Inasmuch as the casing 123 and the parts carried thereby are substantially centered within the casing 10 when the lever 233 is in a substantially vertical plane, a bracket 240 is secured to side wall 13 of the casing 10 projecting outwardly to serve as a stop for the lever 233. By this means, when it is desired to have access to any of the parts within the casing 10, it is only necessary to move the lever 233 about its pivot until it abuts against the stop 240, and the parts are then disposed in a most advantageous position for threading the film for sound pictures.

The operation of the apparatus described above Will, it is believed, be clear from what has gone before. A reel containing the film which it is desired to project is arranged on thebracket 20 and the film is fed between the rollers 21, through the slot 22 in the top wall of the casing 10, is 100 ed around a guide roller 240 (see Fig. 1), is fed between the feed sprocket drum 183 and its cooperating rollers 185, between the sprocket drum 191 and its cooperating rollers 193, between the drum 210 and its cooperating rollers 212, between the sprocket drum 191 and its cooperatingrollers 199, between the take-up sprocket drum 81 and its cooperating rollers 85, around the roller 95 mounted on the arm 93, and on out of the casing 10 through the slot 96, as clearly shown in Fig. 1. The film is so arranged as to be substantially taut between the feed sprocket drums 191 and 191' and is so maintained by the rollers 212 cooperating with drum 210, in order that the picture behind the aperture plate which is being projected upon the screen may lie in substantially a single plane and the image on the screen may therefore be perfectly clear and without fuzziness.

After the film is arranged as shown, the

' arm 87 carrying the rollers 85 is rotated to its limit in a counter clockwise direction (Fig. 1) so as to gauge or measure a loop 97 offixed length between the feed sprocket and the take-up sprocket drum 81, in the manner described above, in order that the length of film between the picture projecting aperture and the sound reproducing mechanism may be fixed and perfect synchronism of sound and picture may be obtained. Adjustment of this length of film may be obtained by means of the'screw 92 and arm 95. The plate 221 is adjusted over the aperture 223 in the masking plate 225 according to whether or not a sound film is being projected.

It is important to note that the film feeding sprockets are mounted on the casing 123 and are absolutely fixed in longitudinal spaced relation to each other, being carried by the casing when the same is moved by the lever.

233 and parts controlled thereby for masking the picture on the screen. Hence, the length of film between the projection apparatus and the sound reproducing mechanism remains fixed at all times regardless of the masking operation, and the film passing before the source of light remains taut at all times, so that a sharp image is projected. Further-.

-more, the casing 10 and all of the apparatus carried thereby constitute a unit and may be pivoted as a unit about the shaft without interrupting the operation of the device, by

, means of the adjustable connection between casing 10 and gear box 37 The arrangement drum 191" of the motion transmitting gearin with the casings 37 and 52 efiects economy 0 space and enables such gears to be continually bathed in oil, thus reducing noise and wear.

Furthermore, the arrangement of the film feeding actuating mechanism within the easing 123 is extremely advantageous inasmuch as all of the parts carried by the shaft may be removed substantially as a unit or any element thereof quickly replaced or repaired. If desired, the entire shaft 50 above the coupling 54 may be removed together with all the parts carried thereby and a similar unit sub stituted in a very short period of time, so that the apparatus need not remain out of operation while repairs or replacements are being made.

As described above, the shutter may be adjusted by means of the manipulating member 101 and the parts controlled thereby and such adjustment may, if desired, be made while the apparatus is in operation. means of the adjustable arrangement of the cams described above, the star wheels 145 and 151 and the sprocket drums actuated thereby, may bemade to rotate absolutely simultaneously, thus maintaining the film taut at all times between the drums 191 and 191.

It will be readily understood of course, that when the apparatus is in operation the film feed sprocket drum 183, being geared directly to the worm 138, will be rotated continuously, thus maintaining a loop of film above the sprocket drum 191, while the s rocket drums 191 and 191', being operate by the star wheels, will be rotated intermittently. The

Also, by

film takeup sprocket drum 81, being geared directly to the worm 7 5, will also be rotated continuously.

lln the claims, ting means will be used to indicate such mechanism as that housed within the casings 52 and 37; while the term motion convert ing mechanism will refer to such elements as the cams.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention; hence, I do not w1sh to be understood as limiting myself to the exact form, construction, arrangement, and combination of parts herein shown and described or uses mentioned.

the term motion transmit- What I claim as new and desire to secure by Letters Patent is:

1. In apparatus of the class described, a

shaft, a pair of cams carried by said shaft, intermittent film feeding means comprising a 7 shaft, a pair of cams carried by said shaft,

intermittent feeding means comprising a my name this 19th da of A ril A. D. Adm p pair of rotatablemembers operated by said cams, and means securing said cams together and providing relative angular adjustment comprising a pair of annular members secured respectively to said cams and adjustably secured to each other.

4. In apparatus of the class described, a

shaft, a pan of cams carried by said shaft, intermittent filmfeeding means operated b said cams, and means arranged on said sha between said cams; and providing relative angular adjustment of said cams.

5. In apparatus of the class described, a shaft, a sleeve arranged on said shaft, and a pair of cams arranged on said sleeve in fixed longitudinal relation to eachother for rotation with said shaft, said sleeve and cams being removable as a unit from said shaft.

6. In apparatus of the class described, a shaft, a sleeve mounted on said shaft, a pair of cams arran ed on said sleeve for rotation with said sha and a pair of annular members arranged on said sleeve and secured respectively to said cams and adjustably secured together, said sleeve, cams and annular members bemg removable as a unit from said shaft.

In witness'whereof, I hereunto subscribe 1929. n E. emmoian.

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