Electric heating – Heating devices – Combined with diverse-type art device
Patent
1988-11-30
1990-05-22
Bartis, Anthony
Electric heating
Heating devices
Combined with diverse-type art device
70431, 219202, 219535, 219536, 219552, E05B 1700, H05B 300
Patent
active
049279939
ABSTRACT:
A device is disclosed for preventing freezing of locking cylinders, which includes a heat conductive body member with an incandescent bulb removably mounted within an open-top internal recess. A temperature activated switch provides power to illuminate the bulb and thus heat the locking cylinder when the temperature reaches a predetermined limit, such as 0.degree. C. (32.degree. F.). A heat conductive spring thermally connected at its ends to the body extends around the locking cylinder to hold the body member against an underside of the locking cylinder whereby radiant and convective heat from the lamp may pass through the open top recess to heat the cylinder.
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patent: 4442341 (1984-04-01), Lesquereux et al.
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