Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1998-05-29
2000-04-04
Jeffrey, John A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
21944811, 2194661, 219543, 338307, H05B 300
Patent
active
060464380
ABSTRACT:
A heating element 2 comprises a substantially planar substrate 4 having a heating track or tracks 8 and a thermal sensor 10, in the form of a track or discrete component, disposed on one side of the substrate 4. The thermal sensor 10 is separated from the heating track 8 by a locally thinner portion 12 of the substrate 4. The sensor 10 may be located in, or surrounded by, the thinner portion 12.
REFERENCES:
patent: 1615464 (1927-01-01), Marsden
patent: 2296591 (1942-09-01), Barnes
patent: 2337836 (1943-12-01), Price
patent: 3505498 (1970-04-01), Shevlin
patent: 3710076 (1973-01-01), Frazier
patent: 4851645 (1989-07-01), Wolf et al.
patent: 4852471 (1989-08-01), Lansing
Bartlett Ernestine C.
Jeffrey John A.
U.S. Philips Corporation
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