Importance

Loading Importance Indicators...

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.

Loading the Abstract Image...

First Claim