Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-05-05
1990-05-01
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
340608, 7320425, G08B 2100
Patent
active
049222333
ABSTRACT:
A flow sensor includes a strap-on heater attached to a fluid conduit downstream of a drain valve and two differential temperature measuring thermocouples attached to the fluid conduit downstream of the heater. A monitoring system employing at least one of the flow sensors further includes a controller which receives the differential temperature signal produced by the two thermocouples, a signal indicative of a selected valve position, and a signal indicative of steam turbine operating condition, i.e., hot or cold. The controller includes a logic circuit for correlating the differential temperature value signal, the valve position signal and the steam turbine condition signal to a diagnosis of the drain valve condition.
REFERENCES:
patent: 3438254 (1969-04-01), Seeley
patent: 4418035 (1983-11-01), Smith
patent: 4439396 (1984-03-01), Rolstad
patent: 4440717 (1984-04-01), Bevilaqua et al.
patent: 4449403 (1984-05-01), McQueen
patent: 4576050 (1986-03-01), Lambert
Brochure of Fluid Components, Inc. entitled, "Liquid Level & Interface Controllers", printed April, 1985.
Abeles D. C.
Hofsass Jeffery A.
Orsino Joseph A.
Westinghouse Electric Corp.
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