Time delay fire closure releasing device

Details Time delay fire closure releasing device Time delay fire closure releasing device

1978-03-27

1978-12-19

Caun, Peter M.

Flexible or portable closure, partition, or panel

Automatic control

With releasing means for operator and/or counterbalance

E05F 1520

Patent

active

041301560

ABSTRACT:
A time delayed releasing device serves to hold fire closures from being actuated during periodic testing and momentary power failure while still permitting the closure to respond to power outage of more than a momentary nature or to the presence of heat.

REFERENCES:
patent: 751571 (1904-02-01), Stuart et al.
patent: 1230063 (1917-06-01), Burnham
patent: 1487439 (1924-03-01), Burnham
patent: 1559018 (1925-10-01), Taylor
patent: 1708377 (1929-04-01), Cornell
patent: 2564208 (1951-08-01), Michelman
patent: 2785347 (1957-03-01), Tremblay et al.
patent: 3007342 (1961-11-01), Wardlaw
patent: 3254660 (1966-06-01), Ray
patent: 3508446 (1970-04-01), Yeo et al.

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