Oven with food presence indicator

Details Oven with food presence indicator Oven with food presence indicator

1994-11-23

1996-01-23

Leung, Philip H.

Electric heating

Microwave heating

With control system

219506, 219518, 219708, 219706, 99325, H05B 668

Patent

active

054866855

ABSTRACT:
An oven includes a chamber for locating food for heating. An indicator is provided for signalling the existence of food in the chamber. A sensor may react to the weight of the food on a support in the chamber, or a light beam directed in the chamber and interrupted by a food or receptacle for thereby indicating the existence of food. A time delay may be provided between the sensing of the existence of food and the activation of the indicator. In other situations the indicator system operates in other ovens, autoclaves, and furnaces having workpieces for science, technology, and industry.

REFERENCES:
patent: 3300615 (1967-01-01), Smith
patent: 4650970 (1987-03-01), Ohouchi
patent: 4724292 (1988-02-01), Ichikawa
patent: 4833304 (1989-05-01), Ueda

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