Optics: motion pictures – With film carried control signals
Patent
1974-10-07
1976-05-25
Hayes, Monroe H.
Optics: motion pictures
With film carried control signals
352121, 352169, 352174, G03B 2150, G03B 1746
Patent
active
039588726
ABSTRACT:
A motion picture camera of the type having an electrically magnetically operated release. The electric circuit includes a drive circuit and a release circuit as well as a signal circuit connected between the drive circuit and the release circuit. The drive circuit includes an electric motor for driving the film and a normally open drive switch all connected in series with the current source. The release circuit includes a release magnet having an armature and an exciting coil. The armature operates a normally open release switch for closing it upon energization of the exciting coil. The release switch and exciter coil are connected in series with the source. Finally, the signal circuit includes an electro-optic indicator such as an incandescent lamp or light-emitting diode connected in parallel with the exciter coil of the magnet and in series with the motor. As a result, the indicator lights up upon closing of the release switch to produce a light mark on the film before the motor begins to drive the film.
REFERENCES:
patent: 3432228 (1969-03-01), Hellmund
patent: 3809466 (1974-05-01), Kobayashi
Braun Aktiengesellschaft
Hayes Monroe H.
Marmorek Ernest F.
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