Double-pole trigger speed control switch

Details Double-pole trigger speed control switch Double-pole trigger speed control switch

1978-11-20

1980-12-23

Smith, Jr., David

Electricity: motive power systems

Portable-mounted motor and/or portable-mounted electrical...

200157, 310 50, 318345D, 318345H, H02P 516, H02P 728

Patent

active

042412978

ABSTRACT:
A trigger speed control switch for use on portable tools having double-pole contacts with wiping action, larger contact opening gaps, screw-clamp terminals for connection of the power line conductors, a printed circuit board for mounting the speed control circuit, an adjustable trigger lock mechanism with detenting to hold it in adjusted position, and terminals for connecting a load device such as a motor as well as an external filter capacitor. A small version having all of these features is small enough for direct substitution for an on-off trigger switch as well as for universal portable tool application. A larger version having all of these features is adapted for substitution for present wired-components types of trigger speed control switches. In either case, modification of a given tool is not required to receive the double-pole trigger speed control switch.

REFERENCES:
patent: 3439248 (1969-04-01), Winchester et al.
patent: 3648142 (1972-03-01), Corey et al.
patent: 3721879 (1973-03-01), Corey et al.
patent: 4100383 (1978-07-01), Piber

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