Patent GB-376237-A (GB)
Title: Improvements in and relating to apparatus for the associated working of gramophones or other sound recording or repioducing instruments and kinematographic or other picture and like exhibiting devices
IPC: G03B31/00
Filed: 1930-12-31
Abstract: 376,237. Recording sound in association with kinematography. ARANY, F., 148, Kantstrasse, Charlottenburg, Berlin, and BUTZ, F. C., Schloss Schultz-Gr³nlack, R³desheim-on-Rhine, both in Germany. Dec. 31, 1930, No. 39326. Convention date, Dec. 8. Void [Published under Sect. 91 of the Acts]. [Class 40 (ii).] Comprises a method of preparing a sound record to synchronize with an existing picture or combined sound and picture record film, particularly for recording accompanying sound in a foreign language. The picture film is first inspected and perforations are made in this film which are subsequently utilized to control signalling means at sound-recording stations. To assist the attainment of synchronism of the picture film with the new sound recording an accelerated rendering of the action of the pictures can be effected by removing certain of the picture spaces by a cutting device or a delayed rendering may be accomplished by effecting repetition of some of the picture actions. The assembled apparatus is shown by Fig. 1, wherein a picture film B and sound film T are wound from reels 21, 22 to reels 21a, 22a respectively, feeding movement being imparted by a change gear I the shaft 29 of which is driven by an electric motor and drives sprockets 24 through a belt 30. A crank 28 on the shaft 29 permits of manual operation, if desired. The film is inspected and perforations are accordingly made therein, as shown at 90 in Fig. 14, by a perforator C, which as illustrated by Fig. 2, comprises a piston 34 of rectangular section with a button 35 which is manually depressed against the action of a spring 37. A support 270 is provided for the film with a hole 38 in line with the punch and a receptacle 39 for the punched-out film portions. Alternative forms of perforating device are described wherein the punch is actuated by pneumatic means and also by electromagnetic means. The perforations control a contacting device D which may be of the form shown in Fig. 5 wherein each of a number of rollers 57 is carried by a pin 58 and is adapted to enter the perforations in the film. The pin 58 connects with a mandrel 59 having a contacting plate 60 at its outer end which is spring-pressed by a spring 61 and a second contacting plate 62 is held in a tubular portion 64 by a nut 63. The contacting device is built up on a bracket 67 which is mounted to slide on a plate 66 and adapted to be fixed by a screw 68. When one of the perforations 90 registers with a roller 57 the plate 60 makes contact with the plate 62 and a signalling apparatus is operated. A modified form of contacting apparatus is described wherein when a perforation registers therewith pneumatic means become operative to close an electric circuit. As shown by Figs. 9 and 10, the contacting device is replaced by a lightsensitive cell arrangement wherein photo-electric cells Z1 .. Z6 are each adapted to be energized by light from a source Q, which passes through a condensing lens M and prisms P, when a perforation 90 comes opposite a cell. In the circuit of the photo-electric cells Z1 .. Z6 are inserted amplifiers A1 .. A6 the output from which operates relays S1 .. S6 which control a signalling system comprising lamps N1 .. N6 and associated clocks U1 .. U6 situated at stations where the sound recording is being effected. These signals are for the guidance of actors, musicians, &c. The pictures are observed to enable the perforations to be effected correctly by means of a picture gate 26 provided with an objective O for projecting the pictures upon a screen. The objective O comprises an adjustable set of units of varying degrees of magnification. By means of a lever 32 the speed of the film can be varied so that the observations can be carefully made. Below the picture gate a cutter E is arranged to permit of picture spaces being removed. The cutter comprises a pin 84, Fig. 11, acted upon by a pull-back spring 86 and carrying at one end a pushbutton 87 and at the other end a cutter 85 which has an inclined cutting edge. The film is supported about the cutter by a support 271 which has a hole 88 for admitting the blade and carries a receptacle 89 for the removed portions of the film. Reproduction of the sound film record T is effected by optical apparatus G. A gramophone 220 is in driving connection with the apparatus through a clutch H. From the primary film thus modified by cutting or by repeating certain of the pictures a secondary film is produced by copying and this secondary film is afterwards projected in synchronism with the sound reproduction of the record produced by observation of the signals produced by the action of the perforations 90 and the contacting device C.