Apparatus for carbon monoxide detection and automatic shutoff of

Details Apparatus for carbon monoxide detection and automatic shutoff of Apparatus for carbon monoxide detection and automatic shutoff of

1996-04-30

1998-08-11

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340581, 340693, 431 16, 431 22, G08B 1710

Patent

active

057932964

ABSTRACT:
An apparatus for carbon monoxide detection and automatic shutoff of a heating system is provided which includes a single housing containing a thermostat, a carbon monoxide detector, and a control circuit serially connected to the heating system via the existing thermostat wiring connections. The control circuit includes a relay with a plurality of contacts which are opened and closed to automatically control the operation of the furnace based on the operation of the carbon monoxide detector. In another embodiment, an existing thermostat is retrofitted by mounting the existing thermostat on an adapter plate containing an integrated carbon monoxide detector and control circuit. Another embodiment of the invention includes a carbon monoxide detector, a transmitter serially connected to the carbon monoxide detector for transmitting a predetermined radio frequency, and a receiver serially connected to the existing combustion-type furnace system for receiving the predetermined radio frequency from the transmitter. The transmitter communicates with the receiver to automatically shut down the furnace system based on the operation of the carbon monoxide detector.

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patent: 5394934 (1995-03-01), Rein et al.
patent: 5477913 (1995-12-01), Polk et al.
patent: 5576379 (1996-11-01), Murphy

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