Patent GB-469950-A (GB)
Title: Improvements in or relating to motion picture apparatus
IPC: G03B19/18
Filed: 1936-02-05
Abstract: 469,950. Kinematograph apparatus. KODAK, Ltd. Feb. 5, 1936, No. 3432. Convention date, Feb. 16, 1935. [Class 97 (i)] In apparatus driven by a spring motor controlled by hand through a finger lever &c. and also stopped automatically before the energy of the spring has become exhausted, both the hand and automatic controls are effected by a single stop member movable by a common control member to which the finger lever is operatively connected through a lost motion device ; the stop member may be loaded by a spring which yields to act as a shock absorber and afterwards returns to stop the mechanism in a position such that the shutter is closed ; means may be provided for latching the door or cover of the apparatus, and for closing and opening the exposure aperture of a film maga- . zine within the apparatus, and such means may be interlocked with the motor control means. As shown, the stop member is a lever 46 which is slotted at 48 to pivot on a stud 49, and has a flanged end 47 to engage a nose 45 on a disc 44 carried by the driven spindle of the crank disc 18 of a feed claw 20. The lever 46 is controlled by a spring 50 coiled on a pin 51 ; one end 54 of the spring engages the end of the lever and the other end 52 bears on the lever to depress it into engaging position. The end 54 yields under the shock of the disc 44 and afterwards returns to hold the disc in a position corresponding to shutter closure. Hand release of the drive is effected by depression of a finger lever 63, which is pivoted at 62, and operates through a control member 56 having a hook 60 engaging a slot 61 in the lever and movable vertically on two studs 58. The end 64 of the finger lever enters a slot in the member 56 and engages a flange 73 on a slide 70 which is carried by the member 56 and is urged downwards thereon by a spring 76. Automatic stoppage of the motor is effected by a projection 68, on a motor-driven wheel 65, which, shortly before the energy of the spring is exhausted, engages an arm 69 on the member 56 to depress the member ; the spring 76 yields to permit such depression if the finger lever is being held in exposure position. A spring-pressed pawl 78 engages a spur 77 on the member 56 to assist in holding the member in raised position. The casing comprises a hinged cover 13 having a notched post 82 which may be engaged by a flange on the edge of a sliding bar 80 to latch the cover. The latch bar 80 carries, on a leaf spring, a pin 84 which is reduced in diameter just beneath an operating head 87, and is movable along a slot 83 to rest in any of three positions in which it respectively engages expanded parts 90, 91, 92 of the slot. In the first position the cover is unlatched ; a fin 93 on the bar 80 then engages a flange 95 on the motor control member 56 to prevent raising of this member to exposure position, and, if the cover is in open position, a pawl 96 on the bar 80 engages a notch in a leaf spring 97 to prevent movement of the bar 80. Closure of the cover causes a pin 99 thereon to enter the hooked end of the spring 97 to depress the spring and free the pawl 96. The bar 70 may then be moved to its second position in which the cover is latched but the fin 93 still prevents raising of the member 56 for exposure ; movement of the bar 80 to the third position permits movement of the member 56 for exposure. The film may be carried in a magazine 25 having a flexible sliding shutter 32 controlling the exposure aperture 31. The shutter carries a pin 34 which engages a recess in a part 100 of the bar 80 when the magazine is loaded into the apparatus. The length of the shutter 32 is such that movement of the bar 80 to its second position, and consequent movement of the shutter, does not open the aperture 31, but movement to the third position does open this aperture. A pin 102 on the bar 80 may depress a spring 101 in the third position of the bar to assist springs 39, 40 in holding the magazine accurately in position. Specification 469,981 is referred to.