Leak detector for intermittent pressure pipe lines

Details Leak detector for intermittent pressure pipe lines Leak detector for intermittent pressure pipe lines

1982-04-15

1983-09-20

Swisher, S. Clement

Measuring and testing

With fluid pressure

Leakage

340605, G01M 308, G08B 2100

Patent

active

044048424

ABSTRACT:
Two pressure sensitive switches are hydraulically mounted in an intermittent pressure pipe line, and electrically connected in a battery power line, for, respectively, defining a pressure drop below a range of "off" presssure in the intermittent pressure pipe line, and interconnecting timing, alarm and latching circuits in and with the battery power circuit. The pressure sensitive switch at the upper limit of the pressure drop connects the power circuit to the timing circuit to energize it to cycle for a timing period, and, with the timing circuit, connects to the latching circuit for making it conducting during the timing period of the timing circuit. The pressure sensitive switch at the lower limit of the pressure drop connects the power circuit to the alarm circuit to energize it through the latching circuit when conducting, and to continue after the timing period ends and until the alarm circuit is deenergized by manually opening a closed reset switch connected between the pressure drop, lower limit pressure sensitive switch and the alarm circuit. When both pressure sensitive switched are not closed during the timing period, the alarm circuit is not energized, since the amount of the pressure drop is correlated with the length of the timing period to correspond with a loss of "off" pressure in amount due only to the pressure of a leak in the intermittent pressure pipe line.

REFERENCES:
patent: 3273753 (1966-09-01), Johnson et al.
patent: 3935567 (1976-01-01), Reynolds
patent: 4109512 (1978-08-01), Ledeen

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