Safety door edge

Details Safety door edge Safety door edge

1977-03-02

1978-09-26

Downey, Kenneth

Movable or removable closures

Safety means responsive to obstruction to closure

200 6143, E05F 1502

Patent

active

041159527

ABSTRACT:
A door has a flexible channel along its free edge which flexes upon striking an obstruction and brings together two conductive ribbons within the channel. The ribbons are part of an active circuit which includes a relay coil. Temporary contact of the two conductive ribbons resulting from contact with the obstruction de-energizes the relay coil, fully opening the door. Since door opening results from de-energizing a coil, a power or circuit failure will also cause the door to open.

REFERENCES:
patent: 3118984 (1964-01-01), Koenig
patent: 3154303 (1964-10-01), Cavallero et al.
patent: 3754176 (1973-08-01), Miller

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