Manual film-advance device for a multiple-exposure and normal ph

Details Manual film-advance device for a multiple-exposure and normal ph Manual film-advance device for a multiple-exposure and normal ph

1997-07-09

1999-03-09

Blankenship, Howard B.

Photography

Plural image recording

396391, G03B 4100

Patent

active

058813292

ABSTRACT:
A camera is locked in either a multiple-exposure photography state or a normal photography state in association with the initial movement of charge of a shutter to prevent overlapping of frames. When a multiple-exposure
ormal photography changeover mechanism (50) is in a normal photography state, a film-advance drive system (20) and a shutter charge drive system (30) are actuated in association with the actuation of a film-advance lever (10). When the multiple-exposure
ormal photography changeover mechanism (50) is in a multiple-exposure photography state, a film-overadvancing prevention mechanism (40) is actuated so as to operate only the shutter charge drive system (30) in association with the actuation of the film-advance lever (10). When the multiple-exposure
ormal photography changeover mechanism (50) is in a multiple-exposure photography state or a normal photography state, a lock mechanism (60), which operates in association with the commencement of operation of the shutter charge drive system (30) to be actuated with the actuation of the film-advance lever (10), locks the multiple-exposure
ormal photography changeover mechanism (50) in either the multiple-exposure photography state or the normal photography state.

REFERENCES:
patent: 3650191 (1972-03-01), Nomura et al.
patent: 3968508 (1976-07-01), Ikeuchi

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