Combined smoke detection and furnace shut off device
AssigneeJack B. Hirschmann
InventorJack B. Hirschmann
Life of this patent
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Abstract
A combined smoke detection and furnace shut-off device is provided having a smoke detection means which is disposable adjacent a furnace for detecting the presence of smoke unnaturally emitted from the furnace, a means for stopping ignition within the furnace, and means responsive to detection of the smoke by said smoke detection means for activating the ignition stopping means.
Claims7
A combined smoke detection and furnace shut-off device, comprising:
- a furnace having an ignition device and a fuel supply means:
- smoke detection means located in a room surrounding said furnace for detecting the presence of smoke unnaturally emitted from said furnace;
- means for stopping said ignition device;
- and
- means responsive to detection of smoke by said smoke detection means for activating said ignition stopping means.
A device as defined in claim 6 including fuel supply shut-off means for stopping the supply of fuel to the furnace responsive to said smoke detection means.
A device as defined in claim 7 wherein said responsive means is an electric circuit means for receiving a signal from said optical smoke detection means upon reaching said predetermined level of sensed smoke and supplying a signal to said ignition stopping means so as to activate the same.
Dependencies are inferred from the claim text.