Locking cylinder heating

Details Locking cylinder heating Locking cylinder heating

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.

REFERENCES:
patent: 1140864 (1915-05-01), Aubrey
patent: 1423742 (1922-07-01), Silverman
patent: 1489444 (1924-04-01), Kestler
patent: 1770642 (1930-07-01), Gelino
patent: 2382512 (1945-08-01), Simon
patent: 2390475 (1945-12-01), Thomas
patent: 2518863 (1950-08-01), Camden et al.
patent: 2538872 (1951-01-01), Jones
patent: 2774855 (1956-12-01), Simmons
patent: 3192359 (1965-06-01), Swindall
patent: 4110603 (1978-08-01), Peterson et al.
patent: 4442341 (1984-04-01), Lesquereux et al.

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