Electrical trigger switch with safety features

Details Electrical trigger switch with safety features Electrical trigger switch with safety features

1991-06-28

1992-11-10

Cusick, Ernest G.

Electricity: circuit makers and breakers

Switch activation inhibitor

Actuator blocking device

200334, 200 1B, 200338, 200522, 200 4322, 2002931, 2003322, H01H 320, H01H 920

Patent

active

051616793

ABSTRACT:
An electrical trigger switch for controlling current through a pair of main leads. The switch includes a guard, which physically protects the trigger button from being depressed accidentally, and also an electrical safety feature. Particularly in harsh environments, the mechanical protection afforded by the guard alone may be insufficient. The trigger button may be depressed unintentionally, causing accidental injury. Accordingly, the guard of the present invention includes an electrical safety switch. The safety switch moves from a safety state to an enable state only when the guard is pivoted upward to an armed position. Unless the guard is so pivoted and the safety switch is placed in an enable state, the safety switch will stay in a safety state, disabling the trigger button, even if the trigger button is depressed.

REFERENCES:
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patent: 2348393 (1944-05-01), Krieger
patent: 2422755 (1947-06-01), Strother
patent: 2712272 (1955-07-01), Trevaskis et al.
patent: 2747057 (1956-05-01), Obszarny
patent: 2791664 (1957-05-01), Rohacs
patent: 3142227 (1964-07-01), Stringer
patent: 3198922 (1965-08-01), Rohacs
patent: 3204807 (1965-09-01), Ramsing
patent: 4276459 (1981-06-01), Willett
patent: 4399340 (1983-08-01), Crandall et al.

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