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
Application number
GB22563/24A
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Individual
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Individual
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Publication date
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Publication of GB222483ApublicationCriticalpatent/GB222483A/en
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
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Photographic Developing Apparatuses
(AREA)
Photographic Processing Devices Using Wet Methods
(AREA)
Abstract
222,483. Porak, W. Sept. 25, 1923, [Convention date]. Kinematograph apparatus.-The intermittent sprocket b of a projector or viewing apparatus is loosely mounted on its shaft c and driven therefrom by means of a spring g, means for intermittently tensioning and releasing the spring being provided and consisting of oppositely cut ratchet wheels d, f secured respectively to the sprocket and shaft and engaged by a pawl e. Continuous rotation of the shaft tensions the spring until a tooth on the wheel f lifts the pawl so as to release the wheel d. The apparatus may comprise an eye-piece k and a film track v. the shaft, c being provided with a crank h and carrying the whole mechanism.
GB22563/24A1923-09-251924-09-24Improvements in or relating to kinematographic film feeding devices
ExpiredGB222483A
(en)
Improvement in and relating to driving mechanism for imparting intermittent rotary movement to a shaft or the like particularly adapted for operating the feeding device of projecting apparatus
Improvements in and relating to driving mechanism for imparting intermittent rotary movement to a shaft or the like particularly adapted for operating the feeding deviceof projecting apparatus