Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1988-09-09
1989-12-05
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 725, 439482, G01N 3102, G01R 3102
Patent
active
048855332
ABSTRACT:
A probe for providing electrical contact to electrical circuits during the testing thereof. There is a tubular housing having an open end and a generally closed end with a main portion extending from the generally closed end towards the open end and a retaining and sliding bearing portion adjacent the open end having a diameter small than the main portion. A probe plunger is disposed in the tubular housing and has a cylindrical inner portion which is a slide fit and disposed within the main portion of the tubular housing and a cylindrical outer portion of a diameter smaller than the inner portion and forming a shoulder with the inner portion at a point of meeting. The outer portion of the plunger passes through the retaining and sliding bearing portion and has an outside diameter which is a slide fit to the inside diameter of the retaining and sliding bearing portion. A longitudinally compressible bias spring is disposed between the generally closed end of the tubular housing and the inner portion of the probe plunger under a pre-loading for biasing the probe plunger towards an extended position.
REFERENCES:
patent: 4397519 (1983-08-01), Cooney
patent: 4504780 (1985-03-01), Marsella
patent: 4659987 (1987-04-01), Coe et al.
Eisenzopf Reinhard J.
Nguyen Vinh P.
Q A Technology Company, Inc.
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