Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1990-08-21
1992-01-21
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324713, G01R 2702
Patent
active
050830929
ABSTRACT:
A shoe tester for use in environments where static electricity sparking must be eliminated between so called Electrostatic Dissipating (ESD) shoes and the floor, by personnel wearing a pair of such shoes, wherein the tester comprises a pair of metallic electrically conductive shoe plates secured together in spaced but side-by-side relation resting on such floor on insulated studs or the like, on which the person wearing the shoe stands with his shoes on the respective plates, and a "plug-in" electronic circuit for measuring the resistance of such person and the shoes, including a scale and a pointer arm associated with the tester for actuation by the circuit when electrically energized by any grounded 115 volt alternating current outlet available for indicating acceptable and unacceptable shoe resistances, wherein the circuit includes an amplifier arrangement that permits the resistance measurements to be made to be in the range of 2,000 megohms.
REFERENCES:
patent: 2784376 (1957-03-01), Steele
patent: 3030022 (1962-04-01), Gittleman
patent: 3082381 (1963-03-01), Morril et al.
patent: 3631262 (1971-12-01), Jarrett
patent: 3872395 (1975-03-01), Holland
W. E. Anderson, Inc., One Page Bulletin entitled, Safe-T-OHM Shoe Tester, published in 1966, for its Model TM Shoe Tester.
W. E. Anderson, Inc., One Page Sheet entitled, Operating Instructions for Safe-T-OHM Shoe Tester, for its Model TM Shoe Tester, published in 1966.
Clark Stephen S.
Palmer Brian L.
Dwyer Instruments, Inc.
Regan Maura K.
Wieder Kenneth A.
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