Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1985-02-26
1987-09-01
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
62131, 200 6162, 340563, 340585, 340658, G08B 1308
Patent
active
046911952
ABSTRACT:
A device for indicating that a refrigerator door is open, includes a housing which is mountable on a refrigerator in the vicinity of the refrigerator door during the use of the device. A transducer is mountable at the refrigerator door gasket for changing an electrical parameter in response to the movement of the refrigerator door from its closed position to an open position. Circuitry disposed in the housing senses the change in the electrical parameter of the transducer to produce an alarm after a preselected time delay.
REFERENCES:
patent: 3986183 (1976-10-01), Fujiwara
patent: 4074246 (1978-02-01), Conklin et al.
patent: 4241337 (1980-12-01), Prada
patent: 4463348 (1984-07-01), Sidebottom
Miodownik Saul
Sigelman Jesse L.
Mullen Jr. Thomas J.
Sigelman Jesse L.
Swann III Glen R.
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