Measuring and testing – With fluid pressure – Leakage
Patent
1990-05-07
1992-04-07
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 40, 340604, G01M 316
Patent
active
051016575
ABSTRACT:
Devices for detecting and obtaining information about an event, for example the presence of a liquid, which comprise (1) a swellable member which swells upon occurrence of the event and (2) a restraining member which, when the swellable member swells, restricts movement of the swellable member and thus causes the impedance of the device to change. In a preferred embodiment the device comprises two elongate conductors helically wrapped around a support core, a swellable, conductive polymer member surrounding the conductors. Occurrence of an event causes the swellable material to swell and form a conductive bridge between the conductors.
REFERENCES:
patent: 1772232 (1930-08-01), Van Guilder
patent: 2360434 (1944-10-01), Manning
patent: 2432367 (1947-12-01), Andresen
patent: 2563341 (1951-08-01), Kettering
patent: 2716229 (1955-08-01), Werhmann
patent: 3427414 (1969-02-01), Sheldahl
patent: 3465109 (1969-12-01), Williams
patent: 3470340 (1969-09-01), Hakka
patent: 3520476 (1970-07-01), Schmid
patent: 3564526 (1971-02-01), Butts
patent: 3578767 (1971-05-01), Lee
patent: 3970863 (1976-07-01), Kishikawa et al.
patent: 4013924 (1977-03-01), Christensen et al.
patent: 4023412 (1977-05-01), Luke et al.
patent: 4125822 (1978-11-01), Perren et al.
patent: 4193068 (1980-03-01), Ziccardi
patent: 4206632 (1980-06-01), Suzuki
patent: 4246575 (1981-01-01), Purtell et al.
patent: 4374379 (1983-02-01), Dennison, Jr.
patent: 4414441 (1983-11-01), Perry et al.
patent: 4445012 (1984-04-01), Blackburn et al.
patent: 4449098 (1984-05-01), Nakamura et al.
patent: 4563674 (1986-01-01), Kobayashi
patent: 4570477 (1986-02-01), Sugibuchi
patent: 4631952 (1986-12-01), Donaghey
patent: 4926165 (1990-05-01), Lahlouh et al.
Hauptly Paul D.
Lahlouh John
Stewart Ray F.
Wasley Robert S.
Welsh Laurence M.
Burkard Herbert G.
Miller Craig
Raychem Corporation
Richardson Timothy H. P.
Williams Hezron E.
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