Platter feed safety

Details Platter feed safety Platter feed safety

1992-01-08

1993-02-23

Hayes, Monroe H.

Optics: motion pictures

With nonrewinding film strip

Coil type

352 14, 242 5519R, 226 44, G03B 2100

Patent

active

051894513

ABSTRACT:
A safety device for the feed out path of film from a platter system includes a plate pivotally or slidably mounted to a support of the platter system, and carrying a roller which is engaged by film on the feed out path. A spring biases the plate toward an inactive position where the platter system operates normally. If a head wrap condition begins, tension increases on the feed out path which moves the plate against the spring to activate a switch which interrupts power to the platter system and to a projector connected to the platter system.

REFERENCES:
patent: 2875667 (1959-03-01), Chedister
patent: 3154011 (1964-10-01), Gottscho et al.
patent: 3384281 (1968-05-01), Mason
patent: 3587959 (1971-06-01), Glover
patent: 3823890 (1974-07-01), Potts
patent: 4708447 (1987-11-01), Kuoni

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