Trailer temperature sensing alarm for refrigerated trucks

Details Trailer temperature sensing alarm for refrigerated trucks Trailer temperature sensing alarm for refrigerated trucks

1981-05-04

1983-05-24

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340 57, 340506, 340514, 340586, G08B 2100, B60Q 100

Patent

active

043852890

ABSTRACT:
An alarm system for sensing temperature in a refrigerated truck trailer and for providing warning when trailer temperature exceeds one of a plurality of selectable monitor temperatures. The system includes a sensor bank adapted to be positioned within the refrigerated compartment being monitored. A control module, preferably positioned within the truck cab in proximity to the owner or driver, is electrically interconnected therewith. The control module is adapted to be switched between test, off and alarm modes. In the test mode a visual and audio indicator provides a test warning. In the alarm mode the circuit will warn the driver when the temperature within the refrigerated compartment exceeds the target temperature selected by a temperature select switch. To initiate operation of the alarm system, a set indicator provides a constant warning until the remote sensor units cool below their trigger point. After the set warning ceases, the alarm may be switched into the alarm mode to thereafter constantly monitor the refrigeration compartment.

REFERENCES:
patent: 2753548 (1956-07-01), Gates
patent: 3223805 (1965-12-01), Gibson
patent: 3363231 (1968-01-01), Grosgebauer et al.
patent: 4024495 (1977-05-01), O'Brien

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