Proximity operated machine control

Details Proximity operated machine control Proximity operated machine control

1988-07-29

1990-04-17

Pellinen, A. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

307113, H01H 900

Patent

active

049185608

ABSTRACT:
A machine control system for electrically-operated apparatus wherein the operator's hands must be located upon separate spaced switches before the machine functions. The switches are of the proximity type to sense the presence of the operator's hand upon the hand being brought within a predetermined distance from the associated switch, and each switch apparatus employs yieldable force resistance means, such as an elastic diaphragm, to provide slight resistance to the movement of the operator's hand toward said predetermined distance, but does not require such force as to produce medical problems, such as carpal tunnel syndrome.

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patent: 4757213 (1988-07-01), Tiggs et al.

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