Automatic flue damper control system

Details Automatic flue damper control system Automatic flue damper control system

1978-04-27

1980-01-29

Wayner, William E.

Automatic temperature and humidity regulation

Miscellaneous

Burner controls with automatic cutoff

126285B, 318762, 251136, F23L 1100

Patent

active

041857704

ABSTRACT:
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 absence of motor energization, a stopping or braking arrangement 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 provision of an AC trickle circuit connected to the motor.

REFERENCES:
patent: 2937867 (1960-05-01), Schweig
patent: 3010451 (1961-11-01), Hodgins
patent: 3384800 (1968-05-01), Norris et al.
patent: 3617837 (1971-11-01), Beck
patent: 3798523 (1974-03-01), Gross

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