Patent GB-396447-A (GB)
Title: Improvements in and relating to written or printed text records for projection synchronously with talking picture reproduction
IPC: G03B21/26
Filed: 1932-01-23
Abstract: 396,447. Projecting motion pictures and text in association with sound reproduction. FAIRBROTHER, H., 30, Ludgate Hill, London.-(Fernschreiber Akt.- Ges. ; 14, Behren Strasse, Berlin.) Jan. 23, 1932, No. 8013/33. Divided on 396,435 under which a Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 1, 1932. [Class 40 (ii).] In talking-picture projection, written or printed words, corresponding to speech reproduced in association with the pictures, is projected on to the screen from a text record band or film which is separate from the combined sound and picture film. The spoken words and the corresponding text may be in different languages. Apparatus for preparing the text film from the sound film is described. Means are also provided for reeling back the text film after use, whilst it remains in the projection apparatus. Fig. 1 shows one arrangement whereby the text provided on a narrow film which is run through a projector 1 is thrown on to a portion 3 of the picture screen 4. The projector 1 is controlled with respect to the picture projector (not shown), so as to run at the same or at a reduced speed. For producing the text film, the device shown in Fig. 3 is used. In this apparatus, the sound film 13 is run past a reproducing device 18, and a paper strip 37 is run synchronously at a reduced speed over a plate 11, between reels 33, 35, so that the spoken words can be transcribed in shorthand on the strip as it passes a mark 38. Subsequently, the strip 37 is again run from the reel 33 to the reel 35, being manually driven this time in synchronism with another strip (not shown) passing from a reel 34 to a reel 36. On the latter strip, the text is written out or printed, and a reduced copy on a narrow film suitable for projection is prepared therefrom. Fig. 5 shows a device for rewinding the text film whilst it is still in the projector. In this apparatus, during projection the film 41 is driven through the gate 43 from a reel 42 to a take-up reel 45 by means of a power-driven shaft 50, which is geared to the spindle of the reel 45, and which also drives through a clutch 48 a sleeve carrying a feed roll 44. When the film has been fully run off the reel 42, a magnet 66 is energized through the closing of a switch 67, and declutches the feed roll 44 ; at the same time an auxiliary motor 62 is switched on, and drives the reel 42, so that the film is rewound thereon, the switch 67 being reopened when the operation is complete. Various modifications of the mechanism for disconnecting the drive of the feed roll 44 for rewinding the film are described. The switch 67 may be operated by hand, or automatically, e.g. by controlling contact devices through perforations in the film. The clutch lever 63 or its equivalent may be held by a catch until released automatically or by hand. Instead of using an auxiliary rewinding motor, means may be provided for reversing the driving motor of the feed roll 44. The text may be projected on to a blank space on the screen provided when a film similar to that described in Specification 396,435 is projected.