GB473803A - Improvements in or relating to sound film reproducing apparatus - Google Patents
Improvements in or relating to sound film reproducing apparatusInfo
- Publication number
- GB473803A GB473803A GB28058/36A GB2805836A GB473803A GB 473803 A GB473803 A GB 473803A GB 28058/36 A GB28058/36 A GB 28058/36A GB 2805836 A GB2805836 A GB 2805836A GB 473803 A GB473803 A GB 473803A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- tension
- film
- lever
- reproducing apparatus
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
- H01J13/02—Details
- H01J13/32—Cooling arrangements; Heating arrangements
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
473,803. Optical sound-reproducing apparatus. ZEISS IKON AKT.-GES. Oct. 15, 1936, No. 28058. Convention date, Jan. 25, 1936. [A Specification was laid open to inspection under Sect. 91 of the Acts, April 23, 1937.] [Class 40 (ii)] [Also in Group XL] A sound-film optical reproducing apparatus comprises a pivoted arm 11 with rollers 12.. 15 round which the film is led to a drum 3 at the sound-reading station, the film passing by way of a tension-equalizing device to a feed sprocket 20. The tension-equalizing device comprises rollers 18, 19 at the ends of a lever 17 which is pivoted at its centre and has a third arm 21 constrained by a spring 22 the tension of which is adjustable by a nut 23. A link 24 connected to one end of the lever 17 is coupled to a dashpot piston 25 working in a cylinder 26. The lever 17 is provided with a ppinter 27 whose displacement relatively to a fixed mark 28 is a measure of the tension in the film. The Specification as open to inspection under Sect. 91 describes also (a) a mounting for the spindle of the sound drum, and (b) a photo-electric cell of horseshoe form located between the flanges of the sound drum and having its pole-pieces coupled to conductors mounted on a carrier, the cell and the conductors being surrounded by a metal strip to screen the cell 'from external electrical influences. The screening strip is apertured to allow the light modulated by the soundrecord to fall on the photo-electric cell. These subject-matters do not appear in the Specification as accepted, but are described in Specifications 463,610 and 476,777 respectively.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE473803X | 1936-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB473803A true GB473803A (en) | 1937-10-20 |
Family
ID=6541622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28058/36A Expired GB473803A (en) | 1936-01-25 | 1936-10-15 | Improvements in or relating to sound film reproducing apparatus |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR473803A (en) |
| GB (1) | GB473803A (en) |
-
1914
- 1914-06-20 FR FR473803D patent/FR473803A/en not_active Expired
-
1936
- 1936-10-15 GB GB28058/36A patent/GB473803A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR473803A (en) | 1915-01-27 |
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