Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1980-02-07
1981-04-28
Brigance, Gerald L.
Communications: electrical
Condition responsive indicating system
Specific condition
340602, G08B 2100
Patent
active
042649021
ABSTRACT:
A moisture alarm comprises a watertight system with three probes extending down as supportive legs and as ballast from a floatable body or case containing audible and/or RF pulsing-alarm circuitry responsive to moisture detected by any or all of the probes; the case is upwardly convex on top to slip from beneath fixed obstacles in rising water; a provision prevents the probe from shorting out when the unit is set on a metal deck; the free ends of the probes, each of which has a set of outer and inner coaxial electrodes, are apertured, providing access for moisture to reach the inner electrode; a mercury switch sounds the alarm when the unit is tipped over in position lifting inner electrodes from the floor but can be over-ridden by a shunt which permits the unit to be operated inverted as a randdrop alarm; a dual ring conductor embodiment is also disclosed.
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"Water Alert Surface Water Sensing System, Publication of Electro-Consultants Inc.", 1/5/80, Greenfield, Wisconsin.
Brigance Gerald L.
McClellan, Sr. John F.
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