Automatic fireplace damper
First Claim
1. A firebox with a flue and damper, comprising a smoke detector located in a room with the firebox, an automatic control unit for controlling a servo-motor secured to said flue, said servo-motor acting to open and close said damper, a manual override switch for controlling said servo-motor operation when desired, and bracket means securing said servo-motor and said automatic control unit to said flue, said automatic control unit being activated by said smoke detector to open said damper in incremental steps when smoke enters said room by closing an alternating current circuit to said servo-motor.
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Accused Products
Abstract
This device provides a means of automatically detecting smoke in a room, through an ionization chamber, prior to it being noticed by humans. It consists primarily of an automatic control unit, which through a small servomotor will open the fireplace damper in step fashion, or close it to conserve heat. It further includes a manual over-ride switch for use when desired.
8 Citations
5 Claims
- 1. A firebox with a flue and damper, comprising a smoke detector located in a room with the firebox, an automatic control unit for controlling a servo-motor secured to said flue, said servo-motor acting to open and close said damper, a manual override switch for controlling said servo-motor operation when desired, and bracket means securing said servo-motor and said automatic control unit to said flue, said automatic control unit being activated by said smoke detector to open said damper in incremental steps when smoke enters said room by closing an alternating current circuit to said servo-motor.
Specification