Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1986-11-17
1988-06-14
Goldberg, E. A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219452, 219451, 219435, F27D 2700
Patent
active
047513683
ABSTRACT:
A food warming device (21) in which a plate (22, 22a) has an electrical resistance heating element (26, 26a) mounted to a bottom wall (24, 24a) thereof and an electrical switch (23) is mounted in a support surface (31) below the plate (22). The switch (23) includes a movable element (41) which is mounted for movement between a first position electrically coupling the switch (23) to terminal assembly (32, 32a) on the plate (22) and closing the switch (23) and a second position electrically uncoupling the switch (23) from the terminal (32) on the plate (22) and opening switch (23). The movable element (41) is preferably gravity biased toward the open position, and a magnet (44) is mounted to one of the plate (22) and the movable element (41) to displace the movable element (41) against gravity biasing from the second position to the first position when the plate (22 ) is placed on the support surface (31) proximate the switch (23). The terminal (32) on the plate (22) preferably includes a bimetallic strip (54) which acts as a contact member and current control device for regulation of the heat generated by the resistance heating element (26, 26a). A serving counter (81) incorporates the food warming device (21).
REFERENCES:
patent: 3140389 (1964-07-01), Windes
patent: 3586824 (1971-06-01), Barney
patent: 3784787 (1974-01-01), Shevlin
patent: 4307287 (1981-12-01), Weiss
patent: 4399351 (1983-08-01), Koff
patent: 4493978 (1985-01-01), Starnes
patent: 4523083 (1985-06-01), Hamilton
Goldberg E. A.
Lateef Marvin M.
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