Patent GB-198361-A (GB)
Title: Motion picture camera and picture projecting machine
IPC: G03B15/08
Filed: 1923-05-23
Abstract: 198,361. Golden, J. A., (Assignee of Whiteman, C. E.). May 24, 1922, [Convention date]. Kinematograph apparatus for use as a camera, printer, or projector, comprises a carrier for film spools, means for moving the carrier step-by-step in a direction transverse to the film, and means for feeding the film longitudinally after each transverse movement comprising reciprocating gripping members which grip the film only during the feed movements; means for varying the amount of each movement so as to compensate for shrinkage, of the film may be provided, and the film may be imperforate. Figs. 2, 3, and 4 show respectively an incomplete plan, rear elevation, and side elevation of the apparatus. The carrier 50 is held by blocks 53, 54 to a fixed bar 5 so as to be slidable thereon, and has a bracket 55 surrounding a rotatable bar 6. An elongated exposure opening 50<a> is formed in the carrier, and the film passes from a feed spool F, 'between pressure-rollers 98, arranged above and below the opening 50a and the body of the carrier, through feeding and gripping devices, under a roller 106 and up to a take-up spol 107<a>. The carrier is moved laterally by means of a lever 128 pivoted at 37 and having a sector 36 from which extends an arm 58 operatively connected to the carrier. The connection comprises a pin 57 on the arm 58 carrying a cam 135 which is rotatable by a handle 157, the cam engaging between arms 56 extending from the bracket 55. Rotation of the cam alters the effective length of the lever 128 and adjusts the lateral feed of the carrier. The sector 36 has hexagonal pins 39 extending therefrom and engaging on opposite sides of a slotted wheel 32. The slots 45 have lips 42, 43, and are arranged in two sets, those in one set being inclined in the opposite direction to those in the other set. A handle on a shaft 11 operates through gearing to rotate the wheel 32 continuously and thus move the carrier intermittently a number of times in one direction and then similarly in the reverse direction. During these movements the film is held to the carrier by locking jaws 87, Figs. 4 and 14, the jaws being mounted on a rotatable spring- pressed rod 88, the ends 92 of which project upwardly so that they become engaged by cams 93 at the end of each lateral travel and cause the jaws 87 to be lifted from the film. Means are described whereby the rod 6 is rotated intermittently to cause a downward movement of a bar and of a gripping member 68 when the carrier is in an end position, and an upward movement of these parts when the carrier is in an intermediate position, the bar and member 68 being caused to separate and be free of the film during the upward movements and to grip the film and feed it during the downward movements. The member 68 has a flange 86 which engages either a fixed block 54 at the upper limit of its travel or a cam 140 on the block, the cam being rotatable so as to vary the upward travel of the member 68 in accordance with shrinkage of the film. The take-up spool is rotated through a ratchet 110 by a pawl 112 pivoted on an arm 113 rocking about a pin 114 carried by a bracket 111 on the carrier. The arm 113 is connected by a spring 115 on a rod 116 to a fixed stud 117 so that as the carrier moves, the spring is alternately tensioned and released to cause an intermittent rotation of the spool. The apparatus is contained in a casing comprising parts hinged together at 1<d> to permit insertion of the film, and a shutter 30 rotating between the lens 20 and an exposure opening 127 in one part is connected through gearing and a clutch 23 to the mechanism in the other part. The casing is provided wih an aperture through which a tube carrying condenser lenses and extending from a lamp house may be inserted for projecting or printing, and a governor-controlled cut-off shutter is also provided.