GB669639A - An improved kinematograph intermittent feed mechanism - Google Patents
An improved kinematograph intermittent feed mechanismInfo
- Publication number
- GB669639A GB669639A GB1990448A GB1990448A GB669639A GB 669639 A GB669639 A GB 669639A GB 1990448 A GB1990448 A GB 1990448A GB 1990448 A GB1990448 A GB 1990448A GB 669639 A GB669639 A GB 669639A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- pawl
- arc
- pin
- stroke
- 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
- G03B1/00—Film strip handling
- G03B1/18—Moving film strip by means which act on the film between the ends thereof
- G03B1/20—Acting means
- G03B1/22—Claws or pins engaging holes in the film
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Advancing Webs (AREA)
Abstract
669,639. Kinematograph apparatus. COUTANT, A. C., and MATHOT, J. July 26, 1948, No. 19904/48. Class 97 (i). In an intermittent feed mechanism having at least one reciprocating pawl, spring urged to engage the film perforations and trail over the film on the return stroke, the return stroke is prolonged until the pawl almost, but not quite, reaches the perforation beyond that which,it is intended to engage on the next feed stroke. In one form, for substandard film with one perforation per frame, the claw is carried on a carriage reciprocated parallel to the film through an amplitude nearly twice the frame height. In the form shown in Fig. 2, the film passes round the drum 13 containing the pawl 2 urged outwards by the spring 5. For film with four perforations per frame the pawl amplitude is increased to nearly a quarter greater than the frame height (arc ef as compared with arc cd). A pin 11 on a uniformly rotating disc engages a slot in a lever 9 pivoted at 10, in which slot is also engaged the pin 12 on the drum 13. The feed stroke of the pawl thus corresponds to the rotation of the pin through the arc hij, less than half its rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1990448A GB669639A (en) | 1948-07-26 | 1948-07-26 | An improved kinematograph intermittent feed mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1990448A GB669639A (en) | 1948-07-26 | 1948-07-26 | An improved kinematograph intermittent feed mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB669639A true GB669639A (en) | 1952-04-09 |
Family
ID=10137082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1990448A Expired GB669639A (en) | 1948-07-26 | 1948-07-26 | An improved kinematograph intermittent feed mechanism |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB669639A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1801645A1 (en) | 2005-12-23 | 2007-06-27 | Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg | Film transport device |
-
1948
- 1948-07-26 GB GB1990448A patent/GB669639A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1801645A1 (en) | 2005-12-23 | 2007-06-27 | Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg | Film transport device |
| US7753528B1 (en) | 2005-12-23 | 2010-07-13 | Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg | Film transport device |
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