Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1975-06-11
1977-02-01
Scott, James R.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 77, H01H 906
Patent
active
040063330
ABSTRACT:
A multipurpose electric trigger switch adapted to be mounted in the handle of a portable electric tool for controlling the A.C. power circuit and, to afford a higher rating, the switch is provided with double-pole butt contacts. The contacts of the switch have a controllable amount of wipe, very low bounce, are non-teasible, have steady contact pressure at the point of tripping open, and have a considerable amount of trigger lever movement between trip "on" and trip "off" positions. The amount of wipe is controlled by the amount of flexure of flexible contract terminals. The low bounce and non-teasibility are controlled by the angular rocking of a spring-biased self-centering rockable plunger and the snapping action of an actuator having camming surfaces in engagement with the plunger and rocking surface in engagement with the flexible contact terminals. Steady contact pressure at the point of tripping open is achieved due to an inclined camming surface of the actuator rising to an apex point. The amount of trigger lever movement between trip "on" and trip "off" positions is controlled by the angular degree of rocking of the plunger and the lateral distance across inclined camming surfaces of the actuator.
REFERENCES:
patent: 3081385 (1963-03-01), Scott
patent: 3249725 (1966-05-01), Hutt et al.
patent: 3322914 (1967-05-01), Puccini
patent: 3869590 (1975-03-01), Hultz
Autio William A.
Cutler-Hammer, Inc.
Ginsburg Morris
Rather Hugh R.
Scott James R.
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