G - Physics – 01 – K
Patent
G - Physics
01
K
236/14
G01K 5/62 (2006.01) A62C 37/16 (2006.01) G08B 17/02 (2006.01)
Patent
CA 1063993
RESETTABLE, HEAT ACTUATABLE FIRE LINK Abstract of the Disclosure A resettable fire link is described comprising a releasable member, gripping means for engaging said releasable member in the normal position and for releasing said releasable member in the activated position. Said gripping means comprises heat responsive means for causing said gripping means to move to the normal position in response to an ambient temperature and for causing said gripping means to move to the activated position in response to a preselected increase in said ambient temperature. Mechanical activation means are also provided for movement from a first withdrawn to a second extended position. In said first withdrawn position, the mechanical activation means allows said gripping means to move freely between its normal and said activated position, as aforesaid. The mechanical activation means also may independently cause said gripping means to move to the activated position. As a result, a novel heat and/or remote mechanically activated fire link is provided which is ideally suited for disposition in a "dirty" environment such as might be found in a poorly filtered ventilating system. The fire link of the present invention maintains excellent heat response characteristics, is resettable, and will function under fail-safe conditions, that is, either in response to a preselected increase in ambient temperature, or in response to the remote activation of the mechanical activation means. If a malfunction occurs in one of the alternate activation means, the other activation means is free to function.
274391
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