Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Patent
1993-06-07
1994-05-03
Yasich, Daniel M.
Measuring and testing
Liquid level or depth gauge
Immersible electrode type
29 2541, 29825, 361284, G01F 2326, H01G 528
Patent
active
053076788
ABSTRACT:
A level measuring probe in which all potential leakage paths are closed by concentrically shrinking the outmost diametrical surface of the probe by some mechanical means such as a crimper or rotary swager to provide sufficient force to substantially uniformly deform the ground, guard, and active elements and insulators around the circumference of the probe such that multiple seals are created. A circumferential notch is preferably provided in the active probe element at the point of the crimping or swaging to provide "blowout protection" whereby the active probe electrode is held in place when used in a high pressure vessel. A pressure seal between the electrodes and insulation material is also maintained by using an elastomeric insulator which returns to its original shape after heating or a thin electrode which "gives" a little when the insulator expands radially during heating. The arrangement of the invention thus eliminates the need for costly machined parts and bushings to provide pressure seals.
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patent: 4811160 (1989-03-01), Fleckenstein
Drexelbrook Engineering Co.
Yasich Daniel M.
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