Refrigerator door usage monitor and display system

Details Refrigerator door usage monitor and display system Refrigerator door usage monitor and display system

1981-11-23

1984-07-31

Trafton, David L.

Communications: electrical

Condition responsive indicating system

Specific condition

62125, 62234, 340529, 364144, 364569, 368 9, G08B 1700

Patent

active

044633483

ABSTRACT:
A microcomputer based monitor and display system for a refrigerator in which visual indicia are provided to indicate to the user the degree of door usage on a rolling average time basis. Threshold time limits are established to correspond to heavy, normal and light usage. The actual door-open time is sensed and accumulated in successive time segments. The rolling average door open time over a predetermined number of time segments is calculated at the end of each time segment and the appropriate lamp is lit depending on how the calculated average door-open time compares to the established threshold values.

REFERENCES:
patent: 1852707 (1932-04-01), Hoffman
patent: 2382733 (1945-08-01), Marcy
patent: 2385525 (1945-10-01), McCloy
patent: 2683970 (1954-07-01), Jacobs
patent: 2701450 (1955-02-01), Duncan
patent: 2741097 (1956-04-01), Miles
patent: 2788640 (1957-04-01), Newberry
patent: 3055188 (1962-09-01), Syfert
patent: 4327557 (1982-05-01), Clarke et al.

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