Gas sensor with closely wound termination springs

Details Gas sensor with closely wound termination springs Gas sensor with closely wound termination springs

G - Physics

01

N

324/25

G01N 27/70 (2006.01)

Patent

CA 1126817

Abstract of the Invention The helical compression spring which completes the electrical circuit between the interior surface of a tubular ion conductive solid electrolyte gas sensing element closed at one end, and an electrical terminal retained in spaced relation to the open end of the sensing element is close wound adjacent the end exposed to temperatures which would cause open coils of the spring to relax and has a compressed length sufficent to maintain a preselected minimum force against the terminal and sensing element over the full range of operating temperatures to which the sensor is ex- posed. In an alternate embodiment of the invention, this spring is provided with a closely wound portion at each end so that the sensor can be assembled by inserting the spring either end first.

347380

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