Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1981-03-17
1983-10-11
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324158F, 339118R, G01R 106, G01R 3122, H01R 304
Patent
active
044095473
ABSTRACT:
The described apparatus includes a member of insulation containing a reservoir of mercury and a passage from a side of the reservoir to a contact aperture in a flat face of the member that engages a test wafer, the contact aperture being below the upper surface of the reservoir by a vertical distance limited to cause automatic return to the reservoir of mercury filling the passage when both ends of the passage are at atmospheric pressure. The length of the passage greatly exceeds said vertical distance.
REFERENCES:
patent: 4101830 (1978-07-01), Greig
Koens, J. G.; "Micromanipulator. . ."; IBM Tech. Disclosure Bulletin; 15, No. 1; Jun. 1972, p. 344.
Karlsen Ernest F.
MSI Electronics Inc.
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