Cold storage room thermometer and back-up power supply

Details Cold storage room thermometer and back-up power supply Cold storage room thermometer and back-up power supply

1985-08-29

1987-03-03

Frankfort, Charles

Thermal measuring and testing

Temperature measurement

Combined with diverse art device

374170, 62127, 307 66, 340585, G01K 108

Patent

active

046472231

ABSTRACT:
An electrically operated thermometer for a cold storage room is normally supplied with current from the secondary winding of a transformer, the primary winding being connected to a conventional alternating current source. A battery is alternatively connected to the thermometer through a manual switch, which is preferably of the momentary type, which must be held engaged.

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