Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1982-05-20
1985-04-09
Bartis, A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219316, 219318, 219336, 219437, 219441, 219523, 219536, H05B 102, H05B 382, A47J 2721
Patent
active
045103755
ABSTRACT:
The immersion heater for an appliance includes a mounting plate, a metal sheathed electrical resistance heating element having two end portions which extend through and which are secured to the mounting plate, and a single fastening device for fixing the mounting plate to the body shell of the appliance. The fastening device comprises a threaded heat conductive stud secured to the mounting plate and a nut having a complementary thread. A raised part of the active portion of the heating element is directly secured to and only to the stud, such as by brazing. A bimetallic element is fixed directly to the stud on the outside of the body shell. The stud provides a heat conductive path between the heating element and the bimetallic element. The bimetallic element bends when the appliance is energized `dry` or when the liquid has boiled down to the element and pushes a dolly overcenter to open a pair of contacts and de-energize the heating element. The appliance is, preferably, an electric kettle provided with a further bimetallic element which switches off the kettle when water therein boils.
REFERENCES:
patent: 3187163 (1965-06-01), Wells et al.
patent: 3277277 (1966-10-01), Wells
patent: 3303327 (1967-02-01), Himelsbaugh
patent: 3728517 (1973-04-01), Tilp
Inskip Michael
Warren Alan
Bartis A.
TI Russell Hobbs Limited
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