GB766349A - Improvements relating to signal recording or reproducing equipment operating in conjunction with a cinematograph or like projector - Google Patents
Improvements relating to signal recording or reproducing equipment operating in conjunction with a cinematograph or like projectorInfo
- Publication number
- GB766349A GB766349A GB173454A GB173454A GB766349A GB 766349 A GB766349 A GB 766349A GB 173454 A GB173454 A GB 173454A GB 173454 A GB173454 A GB 173454A GB 766349 A GB766349 A GB 766349A
- Authority
- GB
- United Kingdom
- Prior art keywords
- projector
- picture
- motor
- speed
- variation
- 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
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
Landscapes
- Projection Apparatus (AREA)
Abstract
766,349. Combined sound and picture apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. April 19, 1955 [Jan. 20, 1954], No. 1734/54. Class 40 (2). Means for indicating correct relative speeds of a magnetic sound record apparatus and a cine projector to facilitate manual adjustment of the relative speeds of said apparatus comprises the utilization of interrupted light from the projector to produce a signal indicative of variation in relative speed. For this purpose, pictures from the cine projector are viewed through a mirror or prism 7, a negative lens 6 and an obturating shutter 9 rotated by a motor 4 driving a magnetic sound tape 2. In the event of error in relative speed of the two pieces of apparatus, a shadow line will travel across the viewed picture in a direction depending upon whether the motor 4 is relatively too fast or too slow. It can be seen from Fig. 3, that should the leading edge of the shutter 9 be in the position shown at the moment when an individual picture frame becomes illuminated, and remains illuminated until the trailing edge has almost reached the same position, a dark line will appear down the centre of the picture, and will remain in that position while the motor 4 rotates at the correct speed. Variation from this position indicates incorrect speed which can be adjusted by suitable manually operable means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB173454A GB766349A (en) | 1954-01-20 | 1954-01-20 | Improvements relating to signal recording or reproducing equipment operating in conjunction with a cinematograph or like projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB173454A GB766349A (en) | 1954-01-20 | 1954-01-20 | Improvements relating to signal recording or reproducing equipment operating in conjunction with a cinematograph or like projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB766349A true GB766349A (en) | 1957-01-23 |
Family
ID=9727068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB173454A Expired GB766349A (en) | 1954-01-20 | 1954-01-20 | Improvements relating to signal recording or reproducing equipment operating in conjunction with a cinematograph or like projector |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB766349A (en) |
-
1954
- 1954-01-20 GB GB173454A patent/GB766349A/en not_active Expired
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