GB666897A - Improvements in or relating to sound film equipment - Google Patents
Improvements in or relating to sound film equipmentInfo
- Publication number
- GB666897A GB666897A GB971149A GB971149A GB666897A GB 666897 A GB666897 A GB 666897A GB 971149 A GB971149 A GB 971149A GB 971149 A GB971149 A GB 971149A GB 666897 A GB666897 A GB 666897A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- sound
- picture
- magnetic sound
- drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/10—Apparatus capable of using record carriers defined in more than one of the sub-groups G11B25/02 - G11B25/08; Adaptor devices therefor
Landscapes
- Facsimiles In General (AREA)
Abstract
666,897. Optical and magnetic sound-film apparatus. SHARPLES, N. A. April 11, 1950. [April 9, 1949] No. 9711/49. Class 40 (ii). In a sound reproducing apparatus for film the shafts of the drive sprocket and scanning drum are extended through the casing of the machine and carry a drive sprocket and stabilizing drum, respectively, for a tape carrying a magnetic sound record. In the embodiment described, a sound and picture projector, Fig. 3, has picture projection drive mechanism 18, an objective 17, and optical sound projection components. consisting of a scanning drum 19, light source 20 and drive sprocket 22. When the film carries an optical sound track the film F passes over a roller 21, but when it has an integral magnetic sound track, the film is passed over a transducer 27 and past an erazing head 28. The shafts 23, 24, Fig. 1 carrying the scanning drum 19 and sprocket 22, respectively, are extended through the casing 1 and carry a stabilizing drum 25 and sprocket 26, respectively, for a separate magnetic sound film 30 which is to be run synchronously with a separate picture film, the transducer 27 and erazing head 28 being unplugged from the picture-film side of the apparatus, and plugged into the opposite side, as shown in Fig. 1. When projecting from sub-standard picture film, the linear velocity may be insufficient for good reproduction from magnetic sound film. Provision is therefore made for simultaneously reproducing a separate magnetic sound film at greater linear velocity by passing the said sound film over larger diameter parts of drums 25, 26 on shafts 23, 24, respectively. The take-off spools 4, 5 are mounted on a forwardly extending bracket 2, while the takeon spools are mounted on a similar rear bracket 3 and are driven through spring-loaded friction discs 9, 10, Fig. 5, by a grooved disc 8 coupled to an electric motor 15 by a belt 16.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB971149A GB666897A (en) | 1949-04-09 | 1949-04-09 | Improvements in or relating to sound film equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB971149A GB666897A (en) | 1949-04-09 | 1949-04-09 | Improvements in or relating to sound film equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
GB666897A true GB666897A (en) | 1952-02-20 |
Family
ID=9877302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB971149A Expired GB666897A (en) | 1949-04-09 | 1949-04-09 | Improvements in or relating to sound film equipment |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB666897A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE936370C (en) * | 1952-03-16 | 1955-12-07 | Leitz Ernst Gmbh | Device on a motion picture projector for the optional demonstration of optical sound and / or magnetic sound films |
DE1013513B (en) * | 1954-02-12 | 1957-08-08 | Zeiss Ikon Ag | Sound image projector |
DE1096747B (en) * | 1952-10-11 | 1961-01-05 | Bauer Eugen Gmbh | Sound film device |
-
1949
- 1949-04-09 GB GB971149A patent/GB666897A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE936370C (en) * | 1952-03-16 | 1955-12-07 | Leitz Ernst Gmbh | Device on a motion picture projector for the optional demonstration of optical sound and / or magnetic sound films |
DE1096747B (en) * | 1952-10-11 | 1961-01-05 | Bauer Eugen Gmbh | Sound film device |
DE1013513B (en) * | 1954-02-12 | 1957-08-08 | Zeiss Ikon Ag | Sound image projector |
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