GB687037A - Improvements in or relating to film footage counters for cinematograph cameras - Google Patents
Improvements in or relating to film footage counters for cinematograph camerasInfo
- Publication number
- GB687037A GB687037A GB402951A GB402951A GB687037A GB 687037 A GB687037 A GB 687037A GB 402951 A GB402951 A GB 402951A GB 402951 A GB402951 A GB 402951A GB 687037 A GB687037 A GB 687037A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magazine
- film
- mark
- wall
- shaft
- 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
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/32—Details specially adapted for motion-picture projection
- G03B21/43—Driving mechanisms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection-Type Copiers In General (AREA)
Abstract
687,037. Kinematograph cameras. BOLSEY, J. Feb. 19, 1951, No. 4029/51. Class 97 (i). A footage counter makes a mark on the side of the magazine during the film run to indicate the length of film exposed. In the form shown, a pin 18 carried on the spring drum 16 of the driving motor, strikes the pivoted lever 19 once each revolution and a pawl 22 pivoted on the lever moves forward the ratchet wheel 23 on the shaft 24. The shaft carries at one end, outside the camera casing, a dial, and at the other, in the film magazine compartment, a disc carrying an eccentrically mounted marking member, e.g. of graphite, which makes an arcuate mark on the wall of the film magazine. The mark is concentric with a scale on the magazine wall. The disc is spring-urged outwardly on the shaft to maintain contact between the marking member and the magazine wall. Means may be provided to return the counting mechanism to its initial position when the magazine is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB402951A GB687037A (en) | 1951-02-19 | 1951-02-19 | Improvements in or relating to film footage counters for cinematograph cameras |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB402951A GB687037A (en) | 1951-02-19 | 1951-02-19 | Improvements in or relating to film footage counters for cinematograph cameras |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB687037A true GB687037A (en) | 1953-02-04 |
Family
ID=9769382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB402951A Expired GB687037A (en) | 1951-02-19 | 1951-02-19 | Improvements in or relating to film footage counters for cinematograph cameras |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB687037A (en) |
-
1951
- 1951-02-19 GB GB402951A patent/GB687037A/en not_active Expired
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