GB522517A - Improvements in or relating to film-winding means for sound reproducing or kinematograph apparatus - Google Patents
Improvements in or relating to film-winding means for sound reproducing or kinematograph apparatusInfo
- Publication number
- GB522517A GB522517A GB3235838A GB3235838A GB522517A GB 522517 A GB522517 A GB 522517A GB 3235838 A GB3235838 A GB 3235838A GB 3235838 A GB3235838 A GB 3235838A GB 522517 A GB522517 A GB 522517A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spindle
- motor
- film
- rewinding
- spool
- 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)
- Details Of Cameras Including Film Mechanisms (AREA)
Abstract
522,517. Film winding and rewinding means. OTTO, R. S. Nov. 8, 1938, No. 32358. [Class 97 (i)] A pay-out spool is provided with a counter for the film turns removed, a motor for driving the spool during rewinding, and a switch operable by the counter to stop the motor after a predetermined number of turns have been rewound. As shown, film from a spool on a spindle 2 is fed by a sprocket 4 &c. in a casing 3 into a casing 6 containing sound - reproducing means, and thence, via the sprocket 4, to a take-up spool on a spindle 8, the mechanism being driven by a motor 7, and the spindle 8 by a belt and adjustable friction clutch from a pulley on the sprocket spindle. When rewinding is to be effected, the film is threaded so as to pass only round a roller 21 between the spools, and the spindle 2 is driven by a second motor 22, Fig. 7, carried by a spool arm 1. The roller 21 is mounted on a non-rotatable spindle 29, Fig. 4, and is held, by a spring 31 and friction washers 33, 34, in contact with a housing 28 rotatable through an angle limited by a lever 35, Fig. 1, thereon and fixed stops. A mercury switch 26 in the circuit of the motor 22 is carried by the housing 28, and the housing 28 is counterweighted so that normally the switch 26 is open. The motor 22, Fig. 7, drives the spindle 2 through belt pulleys 23, 25, and its armature 60 is pressed axially by a spring 58 so that the pulley 23 engages a brake pad 62, when the windings are not energized, and thus brakes the pay-out spool; during rewinding the field of the motor 22 moves the armature to separate the pulley 23 and pad 62. The spindle 2 is operatively connected to a counting device 53 having a reset knob 56, and the counting device is connected to a support 54 for a second mercury switch 27 in the circuit of the motor 22, The switch 27 is tilted and closed, during feeding of the film, and remains closed until operated by the counter to stop the rewinding. During rewinding, the rotation of the roller 21 produced by the film causes the switch 26 to remain closed so that the circuit of the motor 22 is completed. The friction clutch on the spindle 8 serves as a brake during rewinding, and means for adjusting it is described.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3235838A GB522517A (en) | 1938-11-08 | 1938-11-08 | Improvements in or relating to film-winding means for sound reproducing or kinematograph apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3235838A GB522517A (en) | 1938-11-08 | 1938-11-08 | Improvements in or relating to film-winding means for sound reproducing or kinematograph apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB522517A true GB522517A (en) | 1940-06-20 |
Family
ID=10337385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3235838A Expired GB522517A (en) | 1938-11-08 | 1938-11-08 | Improvements in or relating to film-winding means for sound reproducing or kinematograph apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB522517A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1127646B (en) * | 1956-12-06 | 1962-04-12 | Steidinger Geb | Length indicator for wire or tape-shaped recording media in exchangeable cassettes that can be locked in the operating state with means for assigning the length indicator and rewound lengths when the cassette is removed |
-
1938
- 1938-11-08 GB GB3235838A patent/GB522517A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1127646B (en) * | 1956-12-06 | 1962-04-12 | Steidinger Geb | Length indicator for wire or tape-shaped recording media in exchangeable cassettes that can be locked in the operating state with means for assigning the length indicator and rewound lengths when the cassette is removed |
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