Personnel antistatic test device
US4800374A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1986 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Oct 31, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.