Air condition monitor unit for monitoring at least one variable

Details Air condition monitor unit for monitoring at least one variable Air condition monitor unit for monitoring at least one variable

1987-05-08

1989-08-01

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340589, 364557, 236 94, 165 12, G08B 1700

Patent

active

048536938

ABSTRACT:
An air condition monitor unit for monitoring the temperature and/or relative humidity of the ambient air. It comprises an air temperature sensor and a relative humidity sensor, and a plurality of memory means capable of retaining set values of respective thresholds comprising the maximum and minimum acceptable values of air temperature and relative humidity. Membrane switch means are connected to the plurality of memory means, operation of which switch means changes a set value retained in the plurality of memory means. Further membrane switch means are connected to the first switch means and the plurality of memory means, successive operation of which further switch means changes the memory means for the time being addressed by the first switch means from memory means to the next in a predetermined cycle. Warning means are connected to the sensors and the plurality of memory means to provide a warning signal in the event that one of the actual values of a given variable as indicated by the sensors passes a corresponding one of the retained values in the plurality of memory means.

REFERENCES:
patent: 4240077 (1980-12-01), Hughes et al.
patent: 4274145 (1981-06-01), Hendricks et al.
patent: 4308911 (1982-01-01), Mandl
patent: 4338511 (1982-07-01), Six
patent: 4411385 (1983-10-01), Lamkewitz
patent: 4606401 (1986-08-01), Levine et al.

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