Electric heating – Heating devices – Tool or instrument
Patent
1993-08-02
1994-09-06
Bartis, Anthony
Electric heating
Heating devices
Tool or instrument
30140, 219228, 219240, 219505, 219523, 425276, H05B 102, H05B 314, H05B 100, A47J 4328
Patent
active
053450590
ABSTRACT:
An electrically-heated spoon including a flat heating device made of a plate-like positive temperature coefficient (PTC) resistor having a periphery side wall of the spoon mounted to the periphery and a handle of the spoon extending from the side wall. A pair of conductive wires in electrical connection with the heating device are embedded in the handle and extend out of a remote end of the handle to define an external connector for connection to an external power source. The plate-like positive temperature coefficient resistor is sandwiched between two insulating plates and then encased by two opposite metal casing members with the conductive wires, which are connected to the resistor, extending through openings formed on the casing members for connection to a power source.
REFERENCES:
patent: 1323523 (1919-12-01), Cox
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patent: 1974051 (1934-09-01), Kelly
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patent: 2533947 (1950-12-01), Lipnicki et al.
patent: 3518407 (1970-06-01), Andrich
patent: 3584190 (1971-06-01), Marcoux
patent: 3886345 (1975-05-01), Baisch
patent: 4005310 (1977-01-01), Baisch
patent: 4034489 (1977-07-01), Hughes
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