G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 17/10 (2006.01) F24F 11/00 (2006.01)
Patent
CA 2119194
A combined smoke detection and furnace shut-off apparatus includes a smoke detector for sensing the presence of smoke in air. There are means for mounting this detector adjacent a return air duct for a furnace. A suitable conduit conducts a portion of air in the return air duct to the smoke detector. An alarm device is electrically connected to the detector and is operated thereby so that an alarm is sounded when smoke is sensed. The apparatus includes means for shutting down at least an ignition device and a blower in the furnace when a shut-down signal is generated by the smoke detector. Preferably the device includes a housing that is mounted on the exterior of the return air duct that contains the smoke detector. A perforated air intake pipe is connected to this housing and can be inserted into the return air duct through an opening. An air filter is mounted on this pipe.
Ridout & Maybee Llp
Smith Robert W.
LandOfFree
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