Moisture alarm
First Claim
1. In a system having means for sensing the presence of moisture and sounding an alarm, the improvement comprising:
- a case, a plurality of probes extending downwardly from the case as legs supporting the case;
each probe including first and second electrodes, means spacing apart the first and second electrodes, and circuit means in said case responsive to the first and second electrodes for sounding an alarm in the presence of moisture forming a conductive path across the first and second electrodes, said case and probes being watertight and said system being floatative, said probes being sufficiently heavy relative to the case for causing the case to float above the probes with the upper portion of the case above water level when floating in water.
3 Assignments
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Accused Products
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.
95 Citations
11 Claims
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1. In a system having means for sensing the presence of moisture and sounding an alarm, the improvement comprising:
- a case, a plurality of probes extending downwardly from the case as legs supporting the case;
each probe including first and second electrodes, means spacing apart the first and second electrodes, and circuit means in said case responsive to the first and second electrodes for sounding an alarm in the presence of moisture forming a conductive path across the first and second electrodes, said case and probes being watertight and said system being floatative, said probes being sufficiently heavy relative to the case for causing the case to float above the probes with the upper portion of the case above water level when floating in water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a case, a plurality of probes extending downwardly from the case as legs supporting the case;
Specification