Safety lock-on motor control

Details Safety lock-on motor control Safety lock-on motor control

1980-01-16

1981-10-20

Shepperd, John W.

Electricity: circuit makers and breakers

Electric switch details

Latches

200157, H01H 920

Patent

active

042962900

ABSTRACT:
A trigger control switch with speed control having a lock-on button on the side thereof is provided with a tab or protrusion extending radially outwardly of the lock pin, a slot is provided extending longitudinally of the lock barrel and a compression spring surrounding the lock pin within the lock barrel has one end portion thereof torsionally engaged with the lock barrel and the other end portion thereof engaged with the lock pin to bias the tab or protrusion out of alignment with the slot to prevent inadvertent depression of the lock pin while enabling an operator to rotate the tab or protrusion into alignment with the slot and thereafter depress the lock pin to provide lock-on effectuation.

REFERENCES:
patent: 2484147 (1949-10-01), Bartel
patent: 2810050 (1957-10-01), Johnson
patent: 3345489 (1967-10-01), Kemnitz
patent: 3378662 (1968-04-01), Sorenson
patent: 3781579 (1973-12-01), Rosenthal, Jr. et al.

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