Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1986-10-31
1989-01-24
Eisenzopf, Reinhard J.
Communications: electrical
Condition responsive indicating system
Specific condition
324509, 361212, G08B 2100
Patent
active
048003743
ABSTRACT:
A personnel antistatic test device includes a conductive shoe plate adapted to be stood upon by the person to be checked, a jack for receiving the plug of a wrist strap worn by the person to be checked, and circuitry for measuring effectiveness of static discharge paths through the wrist strap and through the person's footwear. Electrical circuitry is provided for measuring resistance from a touch plate, through the person's body, through the wrist strap and its lead wire. In the footwear checking mode, resistance is measured from the touch pad through the person's body, through the stockings and shoes to the shoe plate. Appropriate resistance range values are provided for the wrist strap and shoe check mode, and indicator lights are activated showing a satisfactory static discharge path, a hazard condition due to low resistance, or an unacceptable static discharge path due to high resistance.
REFERENCES:
patent: 2401917 (1946-06-01), Drake
patent: 3277364 (1966-10-01), Abrahamson
patent: 4529929 (1985-07-01), Berggren
Brochure: "Wrist Strap System Tester-WSST 300", of Voyager Technologies, Inc., Langhorne, PA 19037.
Cray Research Inc.
Eisenzopf Reinhard J.
Solis Jose M.
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