WILLIAM FRANKLIN SMITH
Audiology at Northshore Dr, Knoxville, TN

4194103, Mar 18, 1980

Sep 13, 1978

5/941917

William N. Smith - Knoxville TN

Robertshaw Controls Company - Richmond VA

H01H 518, H01H 1336

200 67E

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, the actuator unit comprising an actuator plunger and an actuator spring. The actuator spring is movable relative to the housing and has one of the opposed ends thereof operatively interconnected to the blade to move the blade as the spring is moved. The plunger has a lost motion arrangement for acting against an intermediate portion of the actuator spring to cause movement thereof as the actuator plunger is moved whereby the actuator spring can move relative to the actuator plunger through the lost motion arrangement thereof. One of the opposed ends of the actuator spring comprises a pair of spaced apart legs being interconnected together by a narrow band of the actuator spring, the narrow band comprising the intermediate portion of the actuator spring on which the lost motion arrangement of the actuator plunger acts against.

4169971, Oct 2, 1979

Feb 22, 1978

5/880202

William N. Smith - Knoxville TN
Frank Payne - Knoxville TN

Robertshaw Controls Company - Richmond VA

H01H 1326, H01H 1352

200 67B

An electrical switch construction having a housing carrying a pair of spaced contact stops and a snap switch blade having a contact portion for being snapped between the stops when the blade is moved over center by an actuator spring member that is movable relative to the housing by an actuator plunger. The actuator spring member has opposed ends respectively and operatively interconnected to the housing and to the blade and being under tension between the ends thereof so as to have a resultant spring force normally tending to move the actuator spring member toward the plunger and thereby the switch blade toward one of the contact stops. The actuator spring member comprises a one-piece substantially L-shaped leaf spring member separate from the blade and having two legs respectively defining the opposed ends thereof, one of the legs being pivotally mounted to the housing to operatively interconnect that one leg to the housing.

4168412, Sep 18, 1979

Apr 19, 1978

5/897737

William N. Smith - Knoxville TN

Robertshaw Controls Company - Richmond VA

H01H 518

200 67D

An electrical switch construction having a fixed contact and a movable switch blade carrying a contact for cooperating with the fixed contact under the control of an actuator spring that sustains a contact force on the closed contacts until the actuator spring is snapped overcenter by a movable actuator member operatively associated with the actuator spring, the construction having a stop normally spaced from the actuator spring and adapted for only being engaged by the actuator spring and thereby limiting movement of the actuator spring caused by normal actuation movement of the actuator member when the actuator spring is snapped in one direction by the actuator member to close the contacts. The stop comprises a biasing means. A fixed non-current carrying stop is also provided to be engaged by the blade when the blade is moved by the actuator spring in the contact closing direction and another biasing means carries the fixed contact for being biased in the contact closing direction under the force of the actuator spring placing the blade against the stop and the contact thereof into contact with the fixed contact.