Automatic flue damper control system

Details Automatic flue damper control system Automatic flue damper control system

F - Mech Eng,Light,Heat,Weapons

23

L

341/29, 110/69,

F23L 11/00 (2006.01) F23N 3/08 (2006.01)

Patent

CA 1114044

ABSTRACT OF THE DISCLOSURE For an automatic flue damper assembly of the type in which the motor of a clockwork mechanism is energized to hold the damper closed and the mechanism is mechanically biased to move the damper to an open position in the ab- sence of motor energization, a stopping or braking arrange- ment is provided which applies DC to the motor for dynamic braking as the damper closely approaches its open position. Additionally, the remote possibility of a damper hang-up at an intermediate position resulting from a residual magnetic locking torque is substantially eliminated through the pro- vision of an AC trickle circuit connected to the motor.

315164

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