Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1982-05-04
1985-05-21
Gill, James J.
Communications: electrical
Condition responsive indicating system
Specific condition
137460, 1374875, G08B 1900, F16K 1700
Patent
active
045189552
ABSTRACT:
Leakage in a conduit system is detected by means of a fluid flow detector and evaluated by means of a control device on the basis of predetermined criteria. When the control device, which may include a microcomputer has received a signal from the flow detector indicating that fluid is flowing through the conduit system the control device operates an alarm device and/or closes the fluid supply by means of a valve, if the fluid flow is condidered to be caused by a leak or break in the conduit system evaluated on the basis of the time at which the flow takes place, the duration of the detected flow, the intensity of the detected flow, and/or information about whether the fluid drains of the conduit system are closed. The conduit system may, for example, be a conduit system for supply of water or gas to apartment houses and one-family houses, but may also form parts of industrial plants. The above mentioned method makes it possible to obtain a quick detection of leaks in hidden as well as unexposed conduits or tubes without the presence of persons being necessary, whereby the risk of damages due to leaks may be substantially reduced.
REFERENCES:
patent: 3392580 (1968-07-01), Bain et al.
patent: 3624627 (1971-11-01), Evans
patent: 4081635 (1978-03-01), Moore
patent: 4108088 (1979-12-01), Mallett
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