Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1977-08-05
1978-06-27
Hart, Ro E.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 44, 200164R, 200321, 200328, 310 50, H01H 906
Patent
active
040977056
ABSTRACT:
A quick lock-release mechanism for a trigger of a trigger switch mounted in the handle of a drill housing for activating a motor of a drill, which mechanism will selectively lock and release the trigger. The trigger is slidably connected in the handle with a tapered member affixed in the handle. A locking member is slidably connected to the tapered member and is in superposition to the trigger. A spring is disposed between the trigger and the locking member normally to urge each in opposite directions. The locking member is moveable outwardly of the handle to be forced by the tapered member into a wedge lock position against the trigger whereby the trigger switch is locked "on" and releasable upon slight trigger depression.
REFERENCES:
patent: 2481499 (1949-09-01), Collura
patent: 2525839 (1950-10-01), Sparklin
patent: 3328613 (1967-06-01), Gawron
patent: 3549844 (1970-12-01), Chambers
patent: 3588411 (1971-06-01), Milkey
patent: 3594523 (1971-07-01), Frenzel
patent: 3626118 (1971-12-01), Rotefuhr
patent: 3648142 (1972-03-01), Corey
patent: 3660742 (1972-05-01), Gawron
patent: 3703646 (1972-11-01), Jacyno
patent: 3869591 (1975-03-01), Piber
Bell E. L.
Hart Ro E.
Smith R. E.
The Singer Company
Weinstein H.
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