Trigger switch

Details Trigger switch Trigger switch

1984-10-09

1986-02-25

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318 17, 318345R, 318345H, 318345D, 200157, H02P 700

Patent

active

045729972

ABSTRACT:
A variable resistor and a printed circuit board having a velocity control circuit are separated from each other in a switch case. The resistance of the variable resistor changes upon operation of a trigger. An element constituting the variable resistor is electrically connected to a predetermined pattern of the printed circuit board through a coil spring. The heat-generating portion of a thyristor is separated from the printed circuit board. A storage component is formed in a part of the trigger shaft which is located inside the switch case. A threaded portion of an adjusting screw which extends in the shaft of the trigger, threadably engages an engaging member which can slide in the storage compartment of the trigger shaft. A movable member is brought into slidable contact with the variable resistor by the engaging member, so as to change the resistance of the variable resistor when the trigger and/or the adjusting screw is operated.

REFERENCES:
patent: 3329842 (1967-07-01), Brown
patent: 3447057 (1969-05-01), Brown et al.
patent: 3484632 (1969-12-01), Opalenik et al.
patent: 3536973 (1970-10-01), Matthews et al.
patent: 3543120 (1970-11-01), Robertson
patent: 3660742 (1972-05-01), Gawron
patent: 3755640 (1973-08-01), Kaman et al.
patent: 3886340 (1975-05-01), Bittel
patent: 4095072 (1978-06-01), Piber
patent: 4097704 (1978-06-01), Piber
patent: 4100383 (1978-07-01), Piber
patent: 4137490 (1979-01-01), Brozoski et al.
patent: 4241297 (1980-12-01), Piber et al.

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