Microwave leakage indicator strip

Details Microwave leakage indicator strip Microwave leakage indicator strip

1976-05-17

1977-12-27

Grimley, Arthur T.

Electric heating

Metal heating

Of cylinders

23230LC, 250483, H05B 906

Patent

active

040656551

ABSTRACT:
A microwave leakage indicator for ovens in the form of a strip of encapsulated liquid crystal film backed by a layer of microwave absorbing material mounted around the edge of the door and overlapping the slot between door and oven where leakage might occur. The characteristics of the liquid crystal material are chosen such that if leakage above a preset level does occur at any location around the edge of the door, the absorbing material generates heat resulting in a quickly noticeable colour change in the liquid crystal film.

REFERENCES:
patent: 3802945 (1974-04-01), James
patent: 3804618 (1974-04-01), Fore st et al.
patent: 3826141 (1974-07-01), Pickett et al.
patent: 3919105 (1975-11-01), Katagiri et al.

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