Electrical shock-preventable key unit

Details Electrical shock-preventable key unit Electrical shock-preventable key unit

1988-02-25

1989-08-01

Gall, Lloyd A.

Locks

Parts, attachments, accessories and adjuncts

For key-operated mechanism

206 381, 361212, A47G 2910

Patent

active

048523747

ABSTRACT:
An electrical shock-preventable key unit has a case for slidably accommodating a key body, a slide plate and an electrical shock preventing system. The slide plate engages with the key body and slides reciprocally to position it in the extended position or in the retracted position. The electrical shock preventing system comprises a conductive member provided on the case, a resistor for attenuating the current due to static electricity, and a conductive contact piece which comes into contact with the key body in the extended position, and operates to prevent the user from receiving an electrical shock upon locking or unlocking.

REFERENCES:
patent: 1974547 (1934-09-01), Slade
patent: 2550375 (1951-04-01), Pentek
patent: 2575424 (1951-11-01), Mitchell
patent: 3462183 (1969-08-01), Dudley et al.
patent: 3621164 (1971-11-01), Backer
patent: 3672192 (1972-06-01), Dontas
patent: 4570200 (1986-02-01), Osada et al.
patent: 4633364 (1986-12-01), Nakamura et al.

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