Apparatus to control the cooking temperature of foods

Electric heating – Heating devices – With power supply and voltage or current regulation or...

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219501, 219519, 219413, 361161, 361165, H05B 102

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active

058442090

ABSTRACT:
Apparatus for control of cooking foods temperature by sensing their temperature with thermistors, which form part of a first electrical circuit that induces a magnetic flux in an electromagnet, a second electrical circuit that induces, in the electromagnet, a flux of opposite direction to the former, the resultant flux (larger flux minus smaller flux) generating a magnetic pull on the electromagnet's armature.
The armature is linked to an on/off switch that forms part of a third electrical circuit that contains an alarm.
Spring actuated forces on the armature oppose the magnetic pull. Increase in food temperature brings an increase of current intensity in the first circuit, which causes the magnetic pull to decrease.
At the pre-selected controlled temperature of the food, the magnetic pull is slightly smaller than the opposed springs forces. At this point the armature separates from the core, putting the third circuit's switch on and activating the alarm.

REFERENCES:
patent: 2070491 (1937-02-01), Park
patent: 2592525 (1952-04-01), Huck
patent: 2784288 (1957-03-01), Moran et al.
patent: 3069087 (1962-12-01), Thomas
patent: 4240055 (1980-12-01), Shimizu et al.
patent: 4467163 (1984-08-01), Pauly et al.

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