Fire limiter for ducts in ventilation systems

Details Fire limiter for ducts in ventilation systems Fire limiter for ducts in ventilation systems

F - Mech Eng,Light,Heat,Weapons

24

F

98/18

F24F 13/10 (2006.01) F16K 24/04 (2006.01)

Patent

CA 1116921

ABSTRACT OF THE DISCLOSURE The invention provides a shut-off device for ducts in ventilation systems, comprising a tubular sleeve, a shaft trans- versely mounted within said sleeve with respect to the axis thereof, a closing plate mounted on said shaft and pivotal from an open position in which the plate extends substantially parallel to the axis of the sleeve to a closed position in which the plate extends across the sleeve, the plate being biassed into the closed position, and a control wire coupled to the plate through a fuse for maintaining the plate at least in a partially open position during normal service whereby during normal service a desired throttling effect may be produced with the aid of the control wire and, in the event that the fuse blows, the plate will automatically move to the closed position.

297950

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