G - Physics – 08 – B
Patent
G - Physics
08
B
340/145
G08B 23/00 (2006.01) G01M 3/04 (2006.01) G01M 3/16 (2006.01) G08B 21/00 (2006.01)
Patent
CA 1326891
HYDROCARBON SENSOR ABSTRACT OF THE DISCLOSURE Devices for detecting and obtaining information about an event, for example the presence of an organic 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, and separated and covered by an apertured insu- lating braid; a swellable, conductive polymer member surrounding the braid, and an insulating restraining member surrounding the swellable member. Occurrence of an event causes the swellable member to swell through the apertured member and form a conductive bridge between the conductors.
514348
Hauptly Paul D.
Lahlouh John
Stewart Ray F.
Wasley Robert S.
Welsh Larry M.
Fetherstonhaugh & Co.
Tyco Electronics Corporation
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