Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-11-23
1990-05-01
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
340623, 73307, 200 84R, G08B 2100
Patent
active
049222341
ABSTRACT:
An elongated hollow body is provided with a mid-length transverse partition and one end of the body is mountable from a sewer pipe in lieu of a cleanout plug thereof and contains a buoyant mercury switch tethered to the partition through the utilization of thin, flexible and relatively insulated conductors passing through the partition in fluid tight sealed engagement therewith and electrically connected to spaced contacts within the mercury switch. The other end of the body on the side of the partition remote from the buoyant mercury switch supports a battery, a momentarily actuatable test switch and an electrically actuated signal generating device, the mercury switch, signal generating device and battery being electrically connected in a loop-type circuit. A bypass circuit is provided for bypassing the mercury switch and the test switch is serially connected in the bypass circuit.
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Hofsass Jeffery A.
Orsino Joseph A.
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