Optics: motion pictures – Camera and/or projector drive mechanisms – With indicating means
Patent
1978-06-05
1980-04-08
Hayes, Monroe H.
Optics: motion pictures
Camera and/or projector drive mechanisms
With indicating means
352 72, 352 91R, 352129, G03B 160
Patent
active
041969855
ABSTRACT:
The frame-counting device is primarily intended for use with a film cassette in titling and lap dissolve operations. The film cassette contains an unexposed film having a series of perforations and is of the type having a side wall formed with an opening which defines a film plane and through which the film is exposed. The device includes the following structure: a housing having an aperture for receiving the film cassette with its open side wall ahead, a transport sprocket which is rotatably mounted in the housing and engageable with the perforations of the unexposed film of the cassette received in the aperture of the housing, and a member for shielding the film plane of the cassette as received in the aperture against an access of light. A counter is carried by the housing, which counter is readable from the outside and operatively connected inside the housing to the transport sprocket. In addition, the device is provided with a single frame stepping mechanism, including a stepping wheel operable by a push button to actuate the counter. The stepping mechanism is adapted to be connected to a flexible wire release for use with a motion picture camera for operating the camera for single exposures.
REFERENCES:
patent: 1964879 (1934-07-01), Jelinek
patent: 1999133 (1935-04-01), Shapiro
patent: 2365690 (1944-12-01), Fassin
patent: 2701507 (1955-02-01), Bergenhoff
patent: 3425776 (1969-02-01), Mayr et al.
patent: 3656843 (1972-04-01), Misch
patent: 3706439 (1972-12-01), Skinner et al.
patent: 3945719 (1976-03-01), Iida
Hayes Monroe H.
J. Hengstler K.G.
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