Patent GB-361943-A (GB)
Title: Improvements in or relating to motion picture projecting apparatus
IPC: G03B15/08
Filed: 1930-07-23
Abstract: 361,943. Kinematograph apparatus. STEIN, S. F., Park Hotel, Williams Port, Pennsylvania, U.S.A. July 23, 1930, No. 22277. [Class 97 (i).] Kinematograph apparatus for selectively displaying, on one image receiving surface, two or more sets of images in any desired order, is combined with means whereby the selection may be directed by a person present at a distant event, so that the images displayed may correspond to incidents in that event; the apparatus may be used to depict incidents in a distant horse race &c., either at the time of the race or subsequently, and by means of previously prepared images of the horses actually running, or of other horses. Projection may be effected from a strip film, but Fig. 1 shows a projector comprising three projection lenses 17, 18, 19 each projecting one of three rings of images 11, 15, Fig. 2, carried by one or more discs rotated intermittently by the engagement with the edge of an untoothed wheel 38 of teeth 40 on a driven wheel 39. The projector is normally in position such that the lens 17 projects the images 11 on to a screen 13, but is rotatable on a horizontal pivot 21 carried a base having a vertical pivot 22, so that it may be turned to enable either of the other lenses to project one of the rings of images 15 on to the screen. The turning may be effected by electromagnets 25, 28 under the control of switches 26, 29 which may be operated by electromagnets 201, 301 in the circuits of wireless electrical receivers tuned to the wave-lengths of transmitters 200, 300, alternatively controlled by switches 79, 80, operated by a rotary cam 81. Details of the receiver circuits, including switches which may be automatically controlled by rotating discs or cylinders having adjustable lugs, are described in the Specification. A projection lamp for each lens is controlled simultaneously with the turning of the projector. The picture disc or discs may be removably mounted on the carrying shaft by means of a spring-latch device comprising lugs 44 capable of being passed through slots 47 in the discs and of being turned to hold them. The rings of pictures may be on glass or celluloid, and may be set obliquely in the discs so as to be perpendicular to the projection axes of the lenses ; the discs may carry sound records of matter identifying the pictures or of other matter. A construction of projector is described comprising one movable lens capable of projecting each ring of pictures. The toothed wheel 39 may be mounted on a shaft 51, Fig. 3, driven by a motor 50 and carrying an angularly adjustable notched disc 52. A lever 56 is pressed by a spring 59 to cause a lug &c. 55 to engage the disc 52; when the lug enters the notch, a switch 57 in the circuit of the motor opens, and the rotation of the picture disc stops. Angular adjustment of the disc permits selection of the picture which is then continuously exhibited, and the notch may be closed, when desired, by means of a slidable plate 76 on the disc. An electromagnet 62 in a circuit controlled by push switches 61, which are alternatively and automatically closed when a reversing switch 60 in the motor circuit is in one of its two on positions, moves the lever 56 out of its stopping position and closes the switch 57. The circuit of the electromagnet 62 may also contain a switch 66 operated by the stop lever 64 of a phonograph so that the projector and phonograph may operate simultaneously. The phonograph may have a hinged cover 75 carrying a loud-speaker 96, and also carrying one or more removable projection screens for alternative use ; the projection screens may form a continuous sheet mounted on rollers and capable of being wound from one roller to the other. The loud-speaker may also be used to reproduce sounds relating to the pictures transmitted by telegraphy or wireless telegraphy. The duration &c. of the projection periods for each lens may be recorded on a paper band 84 passing between rollers, by marking-devices 85 on pivoted arms controlled by electromagnets 88, 89, 90 in the various control circuits, and the record, or a perforated sheet of rubber or other insulating material prepared from it, may be used to control subsequent repetitions of the exhibition.