Portable warmer

Details Portable warmer Portable warmer

1990-02-02

1990-12-25

Walberg, Teresa J.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219 1055E, 219 1055F, 219386, 219521, F27D 1102, H05B 302

Patent

active

049805398

ABSTRACT:
A portable warming container having an electric heating element, a temperature sensor, a battery, a wire loop, and a control circuit. The wire loop is arranged to charge the battery through the control circuit, and the temperature sensor ultimately controls the current delivered to the heating element from the control circuit and battery.

REFERENCES:
patent: 812609 (1906-02-01), Stevens
patent: 2236238 (1941-02-01), Lacy
patent: 3728517 (1973-04-01), Tilp
patent: 3813517 (1974-05-01), McGruder
patent: 3931494 (1976-01-01), Fisher
patent: 3978233 (1976-08-01), Bolt
patent: 4095090 (1978-06-01), Pianezza
patent: 4219715 (1980-08-01), Mandle
patent: 4442343 (1984-04-01), Genuit
patent: 4801782 (1989-01-01), Ineson

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