Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-12-27
1990-02-13
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
340693, G08B 1706
Patent
active
049010590
ABSTRACT:
A self-contained electrical warning device for attachment to a wood furnace. Includes a heat sensitive switch, a momentary test switch, a set of batteries, and an alarm. When the furnace reaches a dangerously high temperature, the heat sensitive switch is tripped and the alarm sounds warning the person using the furnace.
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patent: 3959787 (1976-05-01), Messmann et al.
patent: 4636776 (1987-01-01), Leaming
patent: 4712095 (1987-12-01), Georgis, II
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