US1183208A - Motion-picture machine. - Google Patents

Description

E. KEEN.

MOTION PLCTURE MACHIN EL APPLICATION FILED NOV. 26, |909 1,1 83,208. Patented May 16, 1916.

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WITNESSES VIN VENTOR /7/'.s ATTORNEY IE. KEEN.

MOTION PICTURE MACHINE. APPLICATION FILED NOV. 26. I909.

Patented May16, 1916.

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fiis ATTORNEY E. KEEN.

MOTION PICTURE MACHINE.

APPLICATION FILED NOV. 26, I909- Patented May 16, 1916.

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E. KEEN.

MOTION PICTURE MACHINE. I APPLICATION FILED NOV. 26, 1909- l ,1 83 208. Patented May 16, 1916.

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, .KEEN, MOTION PICTURE MACHINE. APPLICATION FILED N0v.26, 1909 1 183 2Q8 Papented-May16, 1916.

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UNITED STATES PATEN @FFICE'.

KEEN, OF NEW YORK, N. Y., ASSIGNOR OF THIRTY-EIGHT ONE-HUNDREDTHS H TO ADRIANA M. E. GRUMMON, OF NEWARK, NEW JERSEY.

MOTION-YICITURE MACHINE.

Specification of Letters Patent. Q gmtgfl B1 315 191341;

Application filed "November 26, 1909. Serial No. 523,911.

Be it known that I, ELIOT KEEN, a citizen of the United States, residing in the borough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvementsin Motion-Picture Machines, of whi h the following is a speci fication.

This invention relates to apparatus for taking or projecting motion pictures, that is, pictures taken in rapid succession of some object in motion, which, when successively viewed, produce the effect of a moving picture.

My ap 'iaratus may beused both for the taking of successive photographs of the moving object, and for the projection of the series of pictures in rapid succession in order to produce the moving picture eifect.

The primary object of my invention is to produce an apparatus for these purposes in which a flat photographic plate may be used as the photographic recording surface.

In the accompanying drawings, which form a part of this specification, Figure 1 is a rear elevation of a camera embodying one form of my invention, the back of the camera being removed to show the interior construction. Fig. 2 is a side view of the reversing gear of the camera shown in Fig. 1, looking outwardly; Fig. 3 is a detail sectional view taken on the line 111 -111 of Fig. 1; Fig. at is a similar view taken on the line IVIV of Fig. 1; Fig. 5 is a detail front elevation of the shutter; Fig. (5 is a side elevation of the shutter and gearing for driving same; Fig. 7 is a side view, partly in section and partly in elevatiorrof the camera shown in Fig. 1; Fig. tion on line VII1-VII1 of Fig. 1", Fig. 9 is a detail view of a device for clamping the plate in the plate holder; Fig; 10 is a view similar to Fig. 1, of a part of a camera, showing a modified form of the operating gearing; Fig. 11 is a sectional view taken on the line XIX1 of Fig. 10; Fig. 12 is a side view of the main gear shown in Figs. 10 and 11, illustrating the opposite side of the gear from that shown in Fig. 11; Fig. 13 is a transverse sectional view of the camera shown in Fig. 1, parts being omitted, showing the mechanism for operating the rotary shutter; Fig. 1a is a side elevationnnd Fig. 15 an end elevation of a reversing gear mechanism of the form shown urged against 8 is a see.

in Fig. 16, illustrating a modified form of temporary loekmg mechanism for the horizontal operating rain; Figs. 16 and 17 are diagrammatic vices illustrating positions of the modified lorking mechanism in different positions. 7

It is to be understood that the drawings forming a part of this specification and the description thereof which follows, set forth but certain specific modifications of my invention chosen for purposes of illustration, and that the same is capable of embodiment in various other forms.

Referring to the drawings in detail, the numeral 1 designates the main frame or bOX of the camera,-,,to the front of which is secured any suitable focusing mechanism 2, carrying lenses \Vithin the box 1 is supported the plate holder carrier 10,'in which is clamped in any suitable manner, as by the'clips 11 secured to the carrier by thumb screws 12, the plate holder 13. The plate holder may be of any usual or well known construction, but is preferably provided with some means for retaining the plate rigidly in position therein. 1 have shown a device well adapted for this purpose, in Fig. 9, in which the end of the plate 13 abuts against a movable bar 11, which is constantly the plate by the springs 15. The bar is also provided with a pin 16, projecting through a hole 17 in the end of the wall 18 of the plate holder, this pin 16 abutting against the end wall 19 of the plate holder carrier when the plate holder is inserted therein. The barll is thus forced positively against the end of the plate and locked in that position. I The plate holder carrier is mounted to move both vertically and transversely in the focal plane, and for this purpose is provided at its corners with a plurality of blocks 20, projecting from its forward face, each of these blocks being provided with a pair of guide openings '21 and 22, arranged at right angles to each other. Through the vertical guide openings 21 pass a pair of vertical guide bars 23, which guide the carrier in its vertical motion and also transmit transverse motion to it, while through the openings 22 pass a pair of horizontal guide bars 24, which transmit vertical motion to the carrier and guide it in its horizontal motion. The guide bars 23 are connected by transverse members 25 and 26, thus forming a recported in the main frame in any suitable manner, as in a box 29 secured toone side of the main frame, a box 30 secured to a bracket 31, and a box 32 secured to a bracket 33. The lower ends of the guide bars 23' preferably project below the transverse member or cross piece 26,.and slide in a groove 34 in the bottom of the main frame or camera box. The horizontal guide bars.

24 are preferably connected by members 35 and 36, thus forming a frame similar to the frame of which the vertical guide bars are a part, and are mounted to slide vertically, being guided at one end by guide bar or shaft 37 supported in boxes 32 and 38, and at the other end in a groove 39 in the side of the camera box'. I

For moving the vertical guide bars 23, and with them the carrier and plate holder, laterally, I provide a cylindrical cam 40, mounted upon a shaft 41, journaled in brackets 31 and 33 and preferably also in the side of the camera box: This cam 40 is provided with a continuous cam groove or thread in the form of an intermittent spiral composed of a plurality of inclined or operating portions 42' and locking portions 43 in planes perpendicular tovthe axis of rotation of the cam. A pin 44 secured to some part of the vertical'guide frame engages this groove. For reciprocating the vertical guide frame and the plate holder and plate carried thereby in order to bring each part of the plate opposite the light aperture of the camera, this cam 40 must be rotated a certain number of turns in one direction and then an equal number of turns in the opposite direction, and for this pur pose I have provided the followingmechanism: Upon the shaft 41 I fix a pair of gears 45 and 46; I journal parallel with the shaft 41 in the-bracket 33 and the side of the camera box, a short shaft 47 upon which are secured a gear 48 adjacent to the gear 45, but in a different plane therefrom and not in mesh therewith, and a gear 49 meshing with the gear 46 on the shaft 41. The gears 45 and 48 are driven by the main driving gear 50 fixed to the short shaft 51 journaled in the side of the camera box and in bracket 52. Any suitable means for rota-t ing this gear, as for instance, the crank 53, may be used. The gear 50 comprises two toothed segments 54 and 55 arranged in different planes and adapted to mesh respectively with gears 45 and 48, which segments carry the same number of' teeth and are so arranged that their teeth together form nearly a complete circumference. The segments are not symmetrically disposed with reference to a diameter of the gear, but

one of the segments is shifted circumferentiallyrelatively to the other, thus causing the segments to lap slightly at one side of the gear as indicated at 56, and opening up a space 57 without teeth at the opposite side of the gear. The object of this arrangement the cam 40 in one direction for a given number of revolutions, depending upon the number of teeth uponthe gear 45 and the number on the segment 54, after which the gear segment will engage the gear 48, and through'shaft 47 and gears 46 and 49 rotate the cam 40 an equal number of times in the opposite direction. The number of teeth on the driving gear and on the small gears is designed to give the cam 40 such a number of rotations that the plate carried by the plate holder, plate holder carrier and vertical guide frame, will bemoved completely across the light aperture 60. As will be seen, however, although the cam 40 rotates continuously for a given number of turns in one direction, the motion of the vertical guide frames and carrier will be intermittent. The latter w'ill be moved only when the inclined camportions 42 engage the pin 44; when the portions 43 of the groove arc in engagement with the pin 44, the latter is held in fixed transverse position. For locking the cam 40 in fixed position after the last tooth of one of the main gear segments hasleft its engagement with its cor responding small gear 45 or 48, as the case maybe, and for holding the cam in fixed po sition until the first tooth of the second main gear segment engages with its small gear, I provide some suitable mechanism,

such, for instance, as that shown in Fig. 4,

in which the shaft 47 is provided with a disk in which are cut a pair of notches 71 and 72. A spring 73 secured to one end of a fixed member 74 has its free end bent to form a projection or tooth 75, which engages with one or the other of the notches 71 or 72.

For moving the plate holder, carrier and horizontal guide frame vertically, I provide a cylindrical cam- 80 having a continuous intermittent spiral groove in its face comprising inclined bearing parts 81, locking parts 82, the latter being located in planes at right angles to the axis of the cam. As the rotation of this cam is not continuous, as will be hereinafter explained, the

very short compared with the inclined or operating groove parts. The latter may,

. therefore, extend throughout the greater part of the circumference whereby their inclination may be considerably reduced for the same advance per revolution. The horizontal guide frame carries a pin 83, which engages with the cam groove. Thecam 80 is jo'urnaled'in any suitable manner, as to brackets 33 and 52, and rotates about a vertical axis. Secured to its upper end is a gear 84 which is adapted to be engaged and rotated by teeth projecting from the side of the main driving gear 50. These teeth are arranged in two series 85 and 86 located in diametrically. opposite positions upon the main driving gear and occupying but a comparatively small part of a complete circumference. Each series of teeth upon the main gear contains the same number of teeth as that upon the gear 84, so that the latter and the cam 80 will be'rotated once every time one of the series of teeth 85 or 86 passes the gear 84, or twice during a complete revolution of the main gear 50. For locking the cam 80 in a fixed position when the gear 84 is not being engaged by either of the series of teeth 85 or 86, I secure to the cam 80 a locking cam 90, having a flat side 91 against which bears the side of main gear 50. In order to release the cam and permit the operating cam 80 to be rotated by the teeth on the main gear, the face of the latter is provided adjacent to each end of each series of teeth 85 and 86, with a recess 92, to afford a clearance for the extremities of the flat cam side 91, when the cam 90- rota-tes. This is best seen by reference to Fig. 8.

From the above description it will be seen that the operation of the plate holder reciprocating mechanism is as follows: Supposing the pin 44 to be at one end of the groove in the cam 40, when the rotation of the crank 53 and main gear is commenced the cam 40 will be rotated continuously for a certain number of turns, with the form shown in the drawing, six. During the first half turn the pin 44 will travel in the first flat portion 4.3 and the first exposure will be made As there is no inclination of the walls of this portion of thegroove. the pin 44 will not be moved but will be locked in a stationary position between the flat cam walls. It will remain in this positionuntil the cam 40 is rotated through'another half revolution or through a portion of a revolution corresponding to the'length of the flat groove 43, when the next inclined portion 42 will engage the pin 44. and force it and the frame and plate holder laterally a distance equal to the width of the second picture. Thus, while the cam 40 rotates continuously, it will be seen that the frame and plate holder are moved laterally intermittently. At the same time that the pin 44 reaches the end of the cam groove, the gear which is driving the cam, for instance, the gear 45 will reach the end of its driving segment 54. Simultaneously the projection on the spring 73, which has been sliding over the face of the notcheddisk 70 positively rotated beneath it, will lodge in one of the notches 71 or 72 and hold the cam in fixed position; also at this time the first of the series of teeth on the side of the gear 50 engages with the gear 84 on the cam 80 and rotates the latter through a single revolution. This is possible at this time as the slots 92 come opposite the flat sided cam and provide sufficient clearance to permit the latter to turn. The

operation of the cam 80 upon the pin 88 is similar to the operation-of cam 40 upon pin 44 and has the effect of moving the horizontal guide frame and the plate holder one step in a vertical direction, preferably downward. As the gear 50 continues to rotate. the second segment 55 now comes into action engaging the gear 48 and rotating the same in the same direction that gear 45 was rotated by gear segment 54. Gear 48 turns shaft 47, and through it gears 49 and 46.- thus rotating shaft 41 and cam 40 in the opposite direction from that in which it was previously rotated. The pin 44, the vertical guide frame and plate holder will now.

be propelled intermittently in the opposite direction from that in which they previously traveled until the pin 44 reaches the end of the cam groove from which it started. At this time the gear segment will pass from engagement with its gear 48 and the second series of teeth 86 will come into engagement with the gear 84. thus rotating the cam 80 another revolution in the same direction in which it was previously rotated.

The plate holder will thus be carried down another step equal to the height of a row ofpictures.

For concentrating the light coming through the camera lens upon the portion of the plate to be exposed for each individual picture, a tube 100 is used, the end of which is brought into as close contact with the face of the plate in the plate holder as is practicable. The diffusion of light over the plate is thus prevented. For limiting the length of the exposure and timing the same to take place in the brief interval when the plate holder and plate are stationary.1 may use any suitable mechanism such as that shown in Figs. 6. and 13, in which a rotary shutter disk 110 provided with one or more apertures 111 is driven by suitable gearing. such as the bevel gears 112 and 113 and shaft 114 from pinion 115, engaging with the internal gear 116 secured to or forced upon the main driving gear 50. For regulating the size of apertures 111 a memcover for theback thereof, as will be obvious.-

I prefer, howover, to merely protect from light the uncovered plate inthe plate holder, thus permitting ready access at all times to the back of the camera, the operating mechanism contained therein, andthe plate holder. This result I accomplish by means of the light-proof box or apron 170, carried by and moving with the plate holder carrier 10. The forward edge of the "apron 170 is brought in as close proximity as possible to,

the rear surface of wall 171 of the box 1,

. and is preferably provided with a flange 172 in order to enlarge the area of contact. For the purpose of insuring a light proof connection at this point, while still permitting freedom of movement, I have found that a piece of pile fabric, such as velvet, secured to the box wall as indicated at 173 and against which the flange 172 rubs, is most satisfactory and effective. Ifdesired velvet i may be secured .to the flange 172 instead of to the box wall, or itmay be used on both rubbing surfaces.

The operation of my device when used as a camera, is as follows: The apparatus being turned to bring the plate holder carrier to the upper limit of its movement and to its extreme lateral position, as,-for instance, the extreme left hand side of Fig. 1, the opening in the light tube 60 will be opposite the lower right hand corner of the plate when inserted. The plate holder- 12 being now secured in the carrier 10, and the slide withdrawn, the apparatus is ready for operation. Crank 53 being now turned, the vertical guide frame, plate holder and plate, will be moved intermittently toward the light. The shutter will also be rotated, its rotation being so timed that one of the apertures 111 will 7 come opposite the opening inthe light tube and permit the light to strike the plate, while one of the cam portions 43 is in engagement with the pin 44: and the plate, plate holder and carrier are positively locked in stationary position. The pin 83 will-at this time be locked by the cam 80, which is held "stationary by the flat sided cam 90 bearing against the face of gear 50, so that the movement of the plate and plate holder in any I direction is absolutely prevented. The continued rotation of the. shutter and disk 110 causes the apertures 111 to pass the light 0 wing and cut off the light, after which t e pin at will be engaged by one of the inclined grooved portions 12, and the plate and plate holder moved laterally one, step until the pin-4: 1 enters the next flat groove portion 43. At this time the shutter will again open, causing a second exposure. \Vhen a serles of exposures has thus been made extending entirely across the plate, the cam 80,

will make a revolution in the manner previously described, dropping the horizontal guide frame, plate holder and plate downward a distance equal to the height of the picture, when another exposure will be made starting the second row of pictures. The rotation of the cam 40 in.'the opposite direction will now commence, thus driving the vertical guide frame, plate holder and plate laterally in the opposite direction, that is, f

. toward the left hand in Fig. 1. A second row of pictures will thus be made across the plate, below the first row. When the end of the row is reached the cam 80 will be rotated again and the'plate holder dropped another step. This operation is continued until the entire plate has been covered with the pictures. It will thus be seen that the plate holder and plate will move positively both in a lateral and in a vertical direction and will be locked in absolutely definite. and

fixed positions during the periods when the exposures are being made; the same mechanism, the'cams and drivinggearing, accomplishing both of these functions.

My apparatus-above described may also be used for projecting pictures upon a screen,

it being simply necessary for thispurpose to mount a positive of one of my plates, upon which a series of pictures has beentaken, in

an open plate holder, that is, one which will permit light to pass through the plate mounted therein, and secure the plate holder in the carrier in the usual manner. If then a source of light is placed behind the plate, suitable lenses being used, and the crank 53 turned, the plate will be reciprocatedand expose the successive pictures in the manner already described, and a motion picture will I be projected upon the screen.

In Figs. 10, 11 and 12, I have shown a modified form of gearing adaptedto operate the cylindrical cams 40 and 80 to reciprocate the plate in the manner already described.

I havenot fully illustrated the guide frames I and carrier in this modification, as it is to be understood that their construction is the same as that shown in Fig. 1. In this modi fication the. cam 40 is mounted upon a shaft 141, carrying'a bevel gear 142, meshing with -a bevel gear 143 on a vertical shaft 144.

The last named shaft carries a pair of oppositely disposed bevel gears 145 and 146 whichare adapted to be driven alternately by a' main driving gear 1&7, upon one face ofwhich are a series of teeth 14S extending somewhat less than one-half of the way around the gear. Suitable means for driving this gear 147 are provided, such as the spur gear 149 fixed to one face thereof and engaged by the pinion 150 carried by the driving shaft at 151, which may be rotated by a hand crank or in any suitable manner.

'As will be understood, when the gear 147 146, which, being on the opposite side of the center of gear 147;. will be rotated in the opposite direction, thus reversing the direction of rotation of shaft 144 and cam'40. On the opposite face of gear 147 from that bearing the teeth 148, are two series of teeth 160 and 161', diametrically spaced, and occupying but a small portion of i the circumference, as shown in Fig. 12. These two series of teeth alternately engage the gear 162 secured to the shaft 163 of the cam 80. The number of teeth in each of the series 160 and 161 is equal to the number of teeth on the gear 162, so that the latter and the cam 80 will make one revolution for each of the series of teeth, or two revolutions for each complete revolution of the gear 147. The two series 160 and .161 are so positioned wit-h relation to the series of teeth 148, that the cam 80 will be rotated just as the direction of rotation of cam is being reversed. For locking the.

cam 80 against displacement durings its stationary periods, I provide on its shaft 163, a fiat sided cam 164 similar to the cam 90 used in the form of apparatus shown in Fig. 1.

Two sets of. slots 165' are used to permit the rotation of this cam and the gear 162 and cam 80, at the proper intervals, I also .provi-de a similar fiat sided cam 166, upon the shaft 144, forlocking that shaft and the cam 40 rotated thereby, in stationary position during the brief periods when the teeth 148 of .the gear 147 are out of engagement with teeth of both of the gears 145 and 146. This locking operation will take place when the flat side of cam 166 is in engagement with'either of the lands167 on the face of gear 147. Grooves 168 extend throughout the greater part of the circumference of the face of the gear 147, permitting the free rotation of the shaft 144 and cam 40. The operation of this modification of my invention is substantially identical with that of the modification already described and will be apparent Without further description.

In Figs. 14, 15, 16 and 17, I have illus trated a modification of the form of my apparatus shown in Fig. 1. in which means for positively positioning and holding the horizontal bearing cam 40 are provided in lieu of the means shown in Figs. 1 and 4, comprising the notched disk 70 and toothed spring 73. As shown in Figs. 14-17, I secure to the shaft 47 adjacent to one side of the gear 50, a cam 180 having flat faces 181 and 182. To the shaft 41 adjacent the other side of the cam 'is secured a cam 183 having flat faces 184 and 185. For engagement with these cams I provide lugs 187 and 189, projecting from opposite faces of the gear 50, and arranged at'the extremities of radii angularly displaced from a diameter an amount equal to the circumferential displacement of the gear segments 54 and 55. 1 also provide the companion set of lugs 186 and 188 angularly displaced from the first set. The operation of theseoperating lugs is as follows: Supposing the parts to be in the position shown in Fig. 14, the teeth 'out of engagement with the teeth on gear 45, while the teeth on segment 54 have not yet engaged with the teeth on gear 48. As gears 45 and 48 are now both disengaged the operating cam 40 is momentarily freed from mechanical connection with the driving gear 50, and may, due to its inertia,-tend to rotate slightly beyond the position which it should occupy before being reversed, carrying with it the gear 45 and the cam 183. Before any excessive rotation has taken place, however, the lug 187 engages with the fiat side 185 of the cam 183, as shown in Fig. 14, forcing it into its normal position as shown in .Fig. 16. The action of the lug 187 on the flat cam side insures the proper positioning of'gear 48 to receive the first tooth of the gear segment As the lug 187 passes from the position shown in Fig. 16, it ceases to prevent rotation of the cam 183, but as it passes from this position, lug 189 comes into action, bearing against face 182 of the other cam 180. Operating cam 40 is thus held stationary until the teeth on gear segment 54 engage with the teeth on gear 45. Lugs 187 and 189 have such an angular relation that as lug 187 passes beyond the position shown in Fig. 17. lug 189 passes from the position shown in Fig. 16, thus permitting reversal of rotation of both cams. The action of lugs 186 and 188 is exactly similar to that of lugs 187 and 189, and their spacing is also identical. It is necessarv to have two flat faces on each cam, as shown, for the reason that the operating cam 40 makes but a partial revolution for the first picture taken. instead of a full revolution as for each of the subsequent pictures, whereby the locking cams will not be left in the same position at the end of a traverse of the plate holder car- I are, it is to be understood, intended to designate merely relative positions, as it is obvious that my apparatus may be used in any position, or that the position of many of the operating parts may be interchanged.

Having thus described my invention, I claim:

1. In an apparatus of the class described, a holder for photographic plates, means for positively moving the same into a plurality of successive positions in a plurality of directions in'the same plane, and means for locking it in each of such positions against movement-in any direction.

2. In a photographic apparatus, a photographic plate-holding device, means for positively imparting to the same an intermittent movement in a plurality of directions in the same plane, and means for locking the same against movement in any direction during the intervals of rest.

3. In an apparatus of the class described, a main frame, fixed horizontal and vertical guiding means in said frame, a pair of vertical guide bars movable laterally and guided by said horizontal guiding means, a pair of horizontal guide bars movable vertically' andguided by said vertical guiding means, means 'for supporting. a photographic plate slidably mounted upon both saidvertical and horizontal guide bars,

means for positively moving said vertical guide bars laterally in definite steps at a predetermined speed with relation to the speed of the other moving elements, and means for positively moving said horizontal guide bars vertically. v

4. In an apparatus of the-.elass described, a plate-holding device and means including a plurality of cams for driving said device in definite steps at predetermined speed inmore than one direction in the same plane and under positive control at all times and locking said device in position at 'predetermined intervals.

5. In an apparatus of the class described, means for imparting intermittent motion to a plate holding device and for locking said device in fixed position during the intervals of rest, said means including a rotary cam, and means for rotating said cam a predetermined number of times in the same direction;

6; In an apparatus of the class described, a frame, a plateholding device mounted thereon, a fixed projection on said frame, and means for moving said frame comprising a cylindrical cam having a continuous groove in its surface, with which said projection engages, said groove 'loeing in the form of an intermittent spiral.

7. In an apparatus of the class described, a frame, a plate holding device mounted thereon, a fixed projection on said frame,

and means for moving said frame comprising a cylindrical cam having a continuous groove in its surface, with which said projection engages, said groove comprising a plurality of inclined portions connected by a plurality of portions lying in planes perpendicular to the axis of rotation of the cam.

8. In an apparatus ofthe class described, a plate holding device, and means for imparting thereto an intermittent lateral and 'vertical motion, said means including a pair directions, and means for rotating the second of said cams through one revolution every time the direction of rotation of the first of said cams is changed.

10. In an apparatus of the class described, a plate holding device, and means for moving the same intermittently and in opposite directions, said means comprising a rotary cam having active portions and inactive portions, and means for rotating said cam alternately in opposite directions, said means comprising a plurality of gear'sin driving connection with said cam and a mutilated gear adapted to engage successively with said cam driving gears.

11. In an apparatus of the class described,

a main frame, a pair of horizontal guide bar's slidable vertically in said frame, a pair of vertical guide bars slidable horizontally in said frame, a plate carrying device slidable vertically on said vertical guide bars and horizontally on said horizontal guide bars, a cylindrical cam rotatable about a horizontal axis and provided with a continu- .ous groove, comprising a plurality of in- V clined-portions connected. by a plurality of portions lying in planes perpendicular to said axis, a projection rigidly connected with .said vertical guide bars engaging said groove, a cylindrical cam rotating about a vertical axis and provided with a continuous groove comprising a plurality of inclined portions and a plurality of portions lying in planes perpendicular to said axis, a projection fixed to said horizontal guide bars and engaging said groove, and means for rotating said cylindrical cams.

12. In an apparatus of the class described, a plate carrying device, and means for moving the same intermittently in each of two nected thereto, one of said shafts being provided with a pair of spaced oppositely facing bevel gears, and the other shaft with'a single gear, and a main driving gear having means fordriving the same, said gear having on one face a gear segment extending through nearly a semi-circumference, and

adapted to engage successively with .the'two bevel gears on the first named shaft, and

having on'its other face two gear segments in diametrically opposite positions adapted to engage successively with the gear on said second named shaft.

13. In an apparatus of the class described, a plate carrying device and means for intermittently moving the same, comprising an operating cam, a gear, and a fiat sided cam adapted to rotate together, gear engaging said first named gear, said flat sided cam engaging said driving gear, a recess in said driving gear to permit the rotation of said flat sided cam at specified times, and means for rotating said driving gear.

14. In an apparatus of the class described, a movable plate holding device, and means for imparting intermittent motion to said device, said means including arOtary-cam provided with a spiral groove and means for rotating said cam.

15. 'In a motion picture camera, a camera box having carrier movably mounted back of said light aperture, means for imparting to said caraxes angularly disposed to each 'a maindriving jzertical and horizontal planes;

a light aperture, a plate holder rier a rapid intermittent movement, a plate holder mounted in said plate holder carrier,

and means for-positively securing a plate in a fixed position in said plate holder, said means comprising a bar movably mounted in said plate-holder adapted to engage an edge of the plate therein, and a pin attached to said bar and projecting through an aperture in a wall of said plate holder and adapted to engage witha part of said plate holder carrier.

16.. In an apparatus of the class described, a photographic plate-holding device, and

means includinga cam surface for positively propelling the same in definite steps at predetermined speed in more than one direction in the same plane, said means positively preventing motion of the plate-holding device during its intervals of rest.

17. In an apparatus of the class described, amain frame, a pair of horizontal guide bars mounted to slide vertically in said frame, a pair of verticalguide bars mounted to slide horizontally in said frame, means for supporting a plate carried by said bars, and a pair of rotatable cam members having axes inclined with respect to one another adapted to slide said bars, respectively, in

18. In an apparatus of the class described, a holder for photographic plates provided -with a cam-engaging member, and means for moving'said holder into a plurality of successive positions in a plurality of direc- ELIOT KEEN.

Witnesses:

EDMUND QUINCEY Mosns, OLIVER WILLIAMS.

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