Drain overflow alarm

Details Drain overflow alarm Drain overflow alarm

1989-12-08

1991-07-02

Eisenzopf, Reinhard J.

Communications: electrical

Condition responsive indicating system

Specific condition

340623, 340624, 137558, 200 6104, 200 84R, G08B 2100

Patent

active

050289101

ABSTRACT:
A drain overflow alarm for a washing machine drain, which alarm is mounted in a vertical drain line offset provided with a check valve and extending from the vertical fixed drain line or standpipe of a structure. In a preferred embodiment the alarm includes a float switch located in the top end of the drain line offset and a transformer, relay, alarm and optical reset button, all provided in a control housing. The float switch is electrically connected to the transformer, relay and alarm, such that obstruction of the fixed drain line causes water to rise in the fixed drain line and through the check valve into the drain line offset. The rising water raises the float element of the float switch and closes the switch to activate the transformer relay and alarm, as well as terminate operation of the washing machine. Clearing of the drain line allows water to flow from the drain line and drain line offset, which causes the float element to drop, and manipulation of the optional reset button facilitates resumption of operation of the washing machine. Alternatively, current to the washing machine may be automatically restored when the float switch is opened, without the necessity of using a reset button.

REFERENCES:
patent: 2985187 (1961-05-01), Hamilton
patent: 3185789 (1965-05-01), Gunther
patent: 3634842 (1972-01-01), Niedermeyer
patent: 3874403 (1975-04-01), Fischer
patent: 4269147 (1981-05-01), Vorbeck
patent: 4380243 (1983-04-01), Braley
patent: 4398186 (1983-08-01), Statz
patent: 4748300 (1988-05-01), Anderson
patent: 4771272 (1988-09-01), Barnes

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