Door closure device

Details Door closure device Door closure device

1975-01-06

1976-01-27

Schroeder, Werner H.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Thermally released check or closer

188 77W, 16 70, E05F 1520

Patent

active

039343065

ABSTRACT:
A safety device for automatically closing a door in response to a predetermined condition, such as fire, is provided by a selectively disengageable brake operatively associated with a pivotable door closure arm. The brake includes a flexible cable wrapped around a brake drum, and means to selectively tighten the cable around the drum. A crank-pin rotates conjointly with the drum and engages the door closure arm to expeditiously close the door in the event of fire.

REFERENCES:
patent: 2098501 (1937-11-01), Lasier
patent: 2874960 (1959-02-01), Durbin et al.
patent: 3038195 (1962-06-01), Bardfeld
patent: 3405791 (1968-10-01), Kaplan
patent: 3648326 (1972-03-01), Gaysowski
patent: 3777423 (1973-12-01), Coulter
patent: 3778866 (1973-12-01), Nakanishi

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