Round damper and fusible link therefor

Details Round damper and fusible link therefor Round damper and fusible link therefor

F - Mech Eng,Light,Heat,Weapons

16

K

137/4.5

F16K 17/40 (2006.01)

Patent

CA 1246961

Abstract A transversely circular fire damper (10) having a butterfly type blade (26) operated by a jack shaft (40) spaced longitudinally of the housing (12) from the blade axle. Linkage including an "over center" stop (46) rotates the blade (26) in one direction by operation of a motor (68) coupled with the shaft (40). A clutch in the form of a pair of relatively telescoped members (62) secured together with entectic solder (74) is connected with the jack shaft (40) and the motor (68) so that the shaft (40) is released from the motor (68) when the ambient temperature reaches a point high enough to melt the solder (74). The jack shaft (40) is spring biased in a direction to close the damper blade (10) under such condition.

493695

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