Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1991-09-09
1992-05-19
Chambers, A. Michael
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137558, 251 65, F16K 3700
Patent
active
051139014
ABSTRACT:
An electronically operated sewer backup alarm apparatus can be placed in a new or existing sewer line connecting a residence, or other facility generating sewage, to a sewage collection system. The alarm apparatus includes a connection element for connection into the sewer line, an electrical apparatus controlling the closing of the back-water valve, a flapper attached in a water tight relationship to the seat of the back-water valve. The flapper also has an "O" ring for sealing the flapper to the seat of the back-water valve, whereby backed up sewage in the sewer pipe is prevented from entering into the residence or other type facility. The backup alarm system also includes first and second electrical conductors extending into the interior of the connection element for electrically contacting backed-up sewage to produce reduced electrical resistance between the first and second conductors. An alarm circuit generates an alarm signal in response to a reduced resistance to actuate an audible buzzer.
REFERENCES:
patent: 2965117 (1960-12-01), Gallacher
patent: 3202165 (1965-08-01), Yavicoli
patent: 3339578 (1967-09-01), Smith
patent: 4207912 (1980-06-01), Ichikawa
patent: 4469304 (1984-09-01), Kah, Jr.
patent: 4569312 (1986-02-01), Riddel et al.
patent: 4612949 (1986-09-01), Henson
patent: 4777979 (1988-10-01), Twerdochlib
patent: 4805665 (1989-02-01), League
patent: 4874012 (1989-10-01), Velie
Chambers A. Michael
Durando Antonio R.
Weiss Harry M.
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