Automatic lower loop restorer mechanism

Details Automatic lower loop restorer mechanism Automatic lower loop restorer mechanism

1977-06-30

1978-09-12

Hayes, Monroe H.

Optics: motion pictures

With loop forming

226 36, G03B 156

Patent

active

041133684

ABSTRACT:
A lower loop restorer for automatically resetting the lower loop of a motion picture projector when the loop is lost. A loop restoring roller, located in the film path, is provided at one end of a pivotable control arm assembly. When the lower loop is lost, the control arm is triggered to cause drive means to pivot the control arm assembly downward and then upward to pull film from the film gate and reset the lower loop. Means are provided to disable or inhibit the operation of the lower loop restoring mechanism when the projector is operated in the reverse projection mode, the in path fast forward mode, or the inpath rewind mode. Means are also provided to protect the film from damage if the lower loop restorer is triggered and film is jammed in the film gate.

REFERENCES:
patent: 2434355 (1948-01-01), Fairbanks
patent: 2494842 (1950-01-01), Thevenaz
patent: 2673486 (1954-03-01), Cunningham
patent: 2699702 (1955-01-01), Cuber
patent: 3021039 (1962-02-01), Michaels
patent: 3746227 (1973-07-01), Krob et al.

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