US PATENT SUBCLASS 352 / 143
WITH FILM STRIP FIRE PREVENTION OR ISOLATION


Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

143WITH FILM STRIP FIRE PREVENTION OR ISOLATION {4}
144  DF  .~> Fire trap {1}
146  DF  .~> Film cooling {2}
149  DF  .~> Auxiliary fire shutter {2}
155  DF  .~> Electrical circuit interrupted by film sensing means


DEFINITION

Classification: 352/143

(under the class definition) Subject matter including means to prevent combustion of the motion picture film or to limit the combustion to a small portion of the film strip.

SEE OR SEARCH CLASS

116, Signals and Indicators,

101+, for thermally responsive indicators generally.

169, Fire Extinguishers,

19+, and 63 for fire extinguishers suitable for motion picture devices. 340, Communications: Electrical,

584, and 577, for electrical indicating systems responsive to temperature or flames; and subclass 628 for such systems responsive to gas or smoke.