Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1977-05-09
1978-10-24
Ciarlante, Anthony V.
Electricity: circuit makers and breakers
Liquid contact
Time delay
H01H 906, H01H 1308, H01H 2110
Patent
active
041223209
ABSTRACT:
A hand-operated, double-action trigger switch is mounted in the handle area of a portable electric tool and comprises a thumb-actuated safety button protruding from the upper portion of the handle and a finger depressable trigger on the lower portion of the handle. The safety button must be pushed by the operator's thumb before the trigger can be depressed. Upon release of the pressure on the trigger, the safety button returns to its original position and effectively places the device in an inoperable or locked position.
REFERENCES:
patent: 3194084 (1965-07-01), Filander
patent: 3358108 (1967-12-01), Hansen
patent: 3370475 (1968-02-01), Hunter et al.
patent: 3646298 (1972-02-01), Weber et al.
patent: 3766352 (1973-10-01), Bigley et al.
patent: 3780246 (1973-12-01), Beckering et al.
patent: 3847233 (1974-11-01), Glover et al.
patent: 3854020 (1974-12-01), Glover et al.
Edgell James Ensign
Sherrill Charles Franklin
Ciarlante Anthony V.
Disston, Inc.
Olive B. B.
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