Patent GB-191504842-A (GB)
Title: Improvements in Motion Picture Machines.
Inventor: GOLBY FREDERICK WILLIAM
IPC: G03B21/32
Filed: 1915-03-29
Abstract: 4842. Golby, F. W., [Adfilm Co.]. March 29. Kinematograph apparatus wherein a film having pictures in two lon.gitudinal series is fed intermittently, and is automatically reversed after either series has been displayed so as to display the other series, is provided with means for automatically shifting the film laterally when the direction of feed is reversed, the objective remaining stationary. Figs. 1 and 2 are respectively side and front elevations of the apparatus, and Fig. 4 is a section on the line 4-4, Fig. 2. The automatic reversal and lateral shift of the film are controlled by the diameter of the roll of film on one of the carriers 14, the roll being engaged by a roller 110 carried by a pivoted arm 109. The arm 109 operates mechanism which actuates reversing-gear ou a shaft 47 and also shifts the gate and intermittent feed-sprockets 35. The apparatus is driven from a power shaft 43, which turns in a constant direction and is geared by a worm 44 and worm-wheel 45 to a sleeve 46 on the shaft 47. Connected clutch elements 61, 62 are slidably carried on the sleeve 46 and engage alternatively with a clutch element 60 secured to the shaft 47, and a seat in the hub of a wheel 49 loose upon the shaft 47. The direction of rotation of the shaft 47 varies with the clutch engaged, and from this shaft are driven the film carriers 14, 15, which are mounted on co-axial spindles at the top of the frame and are rotated by a belt 48<1>, sprockets 39, 40, from which the film passes to or from the carriers, and a shaft 80 which is geared to the shutter 101 and operates the feed-sprockets 35 through a Geneva movement. As shown, the clutch element 62 and its seat are engaged, and the wheel 49 drives the sprockets 40 through wheels 56, 59, and the shaft 80 through co-axial wheels 56, 58 and a wheel 81. The shaft 47 is driven by, and in the opposite direction to, the wheel 49 through wheels 56, 55, 54, 50, the wheel 50 being secured to the shaft, and the sprockets and carriers are rotated in the proper directions for one direction of feed. When the clutch elements 60, 61 are in engagement, the shaft 47 is directly driven in the opposite direction, and the wheel 50 drives the wheels 54, 55, 56 and consequently the sprockets 39, 40 and the shutter, the rotations of all the sprockets and the carriers being reversed. The engagement of the clutches is changed by the action of rollers carried on arms 71, 72 secured to a slide 69, which is caused to travel upon and rock a shaft 70. At the end of each run of the film, one of the rollers is slid into engagement with a cam 75 carried by the sleeve 46, and by its engagement rocks the shaft 70 and bears against one of two disks 76, 77 secured to the clutch elements 61, 62 to shift these elements. The slide 69 is operated by one arm 63 of a bent lever, the other arm 65 of which is operated by arms 118, 119 secured to the arm 109. The rocking of the shaft 70 rotates a pinion 85 through a toothed sector 84, and a crank-arm 86, which is secured to the pinion 85, Fig. 3, carries a pin 87 which engages in a slot 93 on an arm 90 attached to the gate, and shifts it laterally. The gate comprises elements 27, 28 having registering apertures 29, 30, the element 27 curving round the sprockets 35 and being carried by links 32, 33 so that it is capable of being separated from the element 28 and held back by a pivoted catch 37. The sprockets 35 are mounted on a shaft 35<a> carried by bearings 94 on the gate, and on the shaft 35<a> is mounted one element 78 of the Geneva movement, the other element 79 of which is widened so as to be always in engagement with the element 78. A fixed plate 82 with an aperture 83<a> masks the series of pictures not being displayed. Means for adjusting the arm 109 to suit films of different lengths, a friction drive for the film carriers 14, 15 permitting them to rotate at varying speeds, and means for cutting off the electric current for the driving-circuit if the film should break are provided. The film is twisted into spiral loops between the gate and the sprockets 39, 40 when it is being inserted in the machine. The film is retained on the sprockets 39, 40 by rollers 120 carried by arms 121, which are pivoted at 122, are connected by springs, and have engaging ends 123, 124. The rollers are simultaneously removed from the sprockets by moving one of the arms.