Electricity: circuit makers and breakers – Special application – Liquid or moisture responsive
Patent
1976-07-22
1978-08-22
Bentley, Stephen C.
Electricity: circuit makers and breakers
Special application
Liquid or moisture responsive
200 67DA, 200153V, 200249, 200286, H01H 518
Patent
active
041091213
ABSTRACT:
A double throw electrical switch construction having a housing carrying a movable actuator unit for moving a snap switch blade of the housing over center to snap a contact portion of the blade between a pair of spaced contact stops carried by the housing with a contact force being sustained at the "trip point" of the switch construction by an actuator spring of the actuator unit being moved over center before the blade is moved over center by the snap movement of the actuator spring. The actuator unit includes an actuator plunger having lost motion means directly acting against the actuator spring whereby the actuator spring can move relative to the actuator plunger through the lost motion means thereof when the actuator plunger moves the actuator spring over center in either direction thereof.
REFERENCES:
patent: 2821588 (1958-01-01), Fisher
patent: 3233055 (1966-02-01), Russell
Bauer Werner R.
Smith William N.
Bentley Stephen C.
Palo Ralph
Robertshaw Controls Company
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