Wireless system for detecting and stopping water leaks

Details Wireless system for detecting and stopping water leaks Wireless system for detecting and stopping water leaks

1995-11-27

1997-08-12

Chambers, A. Michael

Fluid handling

Ambient condition change responsive

Atmospheric

137 59, 137 781, 137312, 340605, G08B 2100

Patent

active

056555610

ABSTRACT:
A water-activated alarm system, providing an alarm in the event of a water leak, includes a radio-frequency transmitting unit and a receiving unit and a number of safety features to ensure proper operation in the event of an emergency. The transmitting unit includes a flood detector having electrodes to be placed in a flood prone area, a tone encoder, for sending an encoded signal in the event of a flood, and means to provide visible and audible alarm indications, including a buzzer and a user-programmable digital voice circuit for identification of the area in which a flood occurs. The receiving unit includes a superheterodyne receiver or a super-regenerative receiver and detector, a tone decoder to prevent false alarms, a battery charger, a solenoid valve for shutting off the flow of water in the event to a leak detected by the transmitting unit, and a freeze-guard circuit using a peltier device to keep the solenoid valve within a temperature range allowing valve operation during freezing weather conditions.

REFERENCES:
patent: 4297686 (1981-10-01), Tom
patent: 4324268 (1982-04-01), Jacobson
patent: 5008650 (1991-04-01), Hoilberg
patent: 5139044 (1992-08-01), Otten et al.
patent: 5240022 (1993-08-01), Franklin
patent: 5240028 (1993-08-01), Hoch, Jr. et al.
patent: 5305791 (1994-04-01), Kowalchuk
patent: 5345224 (1994-09-01), Brown
patent: 5402815 (1995-04-01), Hoch, Jr. et al.

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