Patent GB-191416032-A (GB)
Title: Improvement in Kinematograph Apparatus & Lanterns to Combine Automatically the Projection of Animated and Fixed Subjects.
Inventor: KORESSIOS THEODORE NICOLAS COR
IPC: G03B21/50
Filed: 1914-07-04
Granted: 1915-07-01
Abstract: 16,032. Koressios, T. N. C. July 4. [Cognate Application, 21,253/14.] Kinematograph apparatus. - The projector is fitted with means for automatically arresting the film to give a stationary projection of any predetermined picture, and the shutter is adapted to be brought to rest with the projecting lens uncovered. Alternative constructions are described for motor and hand-driven machines, and a heatminimizing device is automatically operated. The film is perforated with an elongated aperture 40, Fig. 4, at a particular place for the stationary projection of a section A. A spring-pressed rod 29 of a switch, Fig. 6, projecting through the gate support 28 and normally riding over the margin of the film, slips through the aperture 40, thereby cutting out the driving-circuit of the motor. The switch arm 33, Figs. 6 and 9, normally completes the motor circuit 34, 48, 41, Y, X, 50, 51. When the pin 29 slips through an aperture 40 in film, the motor circuit is broken, and a circuit through the contact 32 and electro-magnet 49 is completed. The armature 41, Fig. 1, of this electro-magnet carries a rod 21 which controls the shutter and the heat-minimizing device. The motor circuit is reformed by pressing the spring knob 30 thereby retracting the pin 29 from the aperture 40 and throwing over the contact-arm 33. For a handdriven machine, the rod 21 rocks a pawl lever 73, Fig. 10, and arrests a ratchet 72 on the driving- shaft 70. To avoid the shock of a sudden arrest, the shaft 70 is driven by the handle by a resilient coupling. To stop the apparatus at any instant by hand, the switch 51, Fig. 9, is rocked over, thereby cutting out the motor circuit and throwing in the electro-magnet circuit. To ensure that the shutter shall uncover the lens, the shutter sleeve 24, Figs. 7 and 8, is loosely mounted on the shutter shaft 61 and is driven by a pin 14 which engages a shoulder 13 on the sleeve. The shoulder is urged against the pin by a spring 26. The sleeve 24 carries a triangular block 12, and the rod 21 which is operated by the electromagnet 49 carries a sleeve 10 embracing the triangular block and having a flat portion 20. With the machine running normally, the sleeve 10 is in the lower dotted-line position, and the block 12 rotates freely. When the machine is stopped, the rod 21 and sleeve 10 are raised, and the triangle block 12 and shutter are rotated to bring the flat portion 20 against one of the faces of the block 12. These faces are positioned relatively to the shutter apertures so that, when the flat surfaces are in contact, the lens aperture 15 is uncovered. On re-starting the machine, the spring 26 operates to bring the pin 14 and shoulder 13 into contact again. The heat minimizing arrangement comprises a series of plates 55, 55<1>, Fig. 2, each having an opening to pass the cone of rays from the condenser and situated between the film and the condenser, and a bi-concave lens 53 or other combination of lens so made as to break and spread the condenser rays. The lens 53 is moved by the rod 21 and arms 17, 16 into the path of the projecting beam simultaneously with the stopping of the film.