Patent GB-190827256-A (GB)
Title: Improvements in Moving Picture Apparatus, applicable also to other purposes.
Inventor: UEBELMESSER CHARLES RANDOLPH
Filed: 1908-12-15
Granted: 1909-07-01
Abstract: 27,256. Uebelmesser, C. R. Dec. 15. Kinematographs. - Relates to various improvements in kinematographs. Mechanism is provided for unwinding the film roll within its carrier 50 from its inner convolutions, and for winding the film upon a reel 57 with the same part of the film forming the inner convolution of the new film roll thus formed. The carrier 50 for the film is horizontally disposed and has a bridgepiece 54 carrying an horizontal film-guide 55. The carrier 50 and the receiving - reel 57 are rotated at substantially the same speed from the driving-mechanism. The receiving-reel 57 is provided with a removable flange shown in Fig. 2. Fire-proof chambers 51, 56 are provided for the film rolls with narrow openings in which are rollers 93, 96, and a narrow metal chamber, formed for the greater part of its length by a guard-plate 107, and a tilting back with vertical ribs extends between the chambers. The guardplate 107 has a curved portion to accommodate the slack portion of the film. Grooved rollers 120, 124 hold the film against the toothedwheels 43, 64 respectively, means being provided for swinging the rollers away from the wheels when necessary. In order to provide for centring the pictures, the secondary. frame 20 is made vertically adjustable upon the stationary frame 11 by means of an adjusting- block 22 slidably mounted on horizontal tracks in the secondary frame 20 ; in this block is a circular hole arranged to fit over. a circular adjusting-cam 23, which is eccentrically mounted upon a shaft 24, by the rotation of which the frame 20 is vertically adjusted. The driving- mechanism and some other parts are mounted upon the secondary frame 20. The main driving- shaft 31 extends across the secondary frame 20, and is rotatably supported thereby. A countershaft 33 is driven through gears 32, 34, and this shaft 33 through inclined toothed pinions 35, 37 drives the vertical shaft 36. The top of shaft 36 bears in a rotary sleeve 38 and drives the shaft 40 through a longitudinal groove 36A and a screw 39 projecting into it. This construction allows vertical adjustment between the shaft 33, which is on the secondary or slidable frame, and the shaft 40, which is supported by the stationary frame. Theintermittent movement of the film is produced as follows : the shaft 33 through a gearwheel 70 drives a pinion 71 on a sleeve 72 which surrounds a shaft 73 ; to this sleeve is attached an inclined-faced cam 74. On the extremity of the shaft 33 is another gear 75, which drives a pinion 76 fast on the shaft.73. The gear-wheels 70, 75 with their co-operating pinions are so proportioned as to carry out the functions hereinafter described. A pair of toothedwheels 80 upon a shaft 81 impart the intermittent movement to the film. On the end of shaft 81 is a star-wheel 82, which is driven by the usual pincarrying disk 84, loosely mounted upon the shaft 73 so that it may be moved longitudinally upon this shaft when impelled by the pin 86. The pin 86 passes through a guiding-disk 87 fixed to the shaft, and bears at its rear end upon the inclined face of the cam. Another pin 88 also bears upon a point on the cam 74 diametrically opposite to the point of contact of pin 86. The two pins are connected together by a rocker-lever 89 pivoted to the shaft 73. The disk 84 rotates rapidly with the shaft 73, but, as the cam 74, which rotates at the lower rate, slides this disk alternately towards or away from the star-wbeel; this wheel is only intermittently driven. A safety-shutter 110 pivoted at 111 and operated through a lever 113 and a collar 114 by a centrifugal element 115 may be employed.