Reaction switch for an actuator drive system

Details Reaction switch for an actuator drive system Reaction switch for an actuator drive system

1979-11-07

1981-09-08

Little, Willis

Electricity: circuit makers and breakers

Limit switch

200153T, 200153HS, H01H 316

Patent

active

042886660

ABSTRACT:
A dual snap-action electric switch is used in an electric motor antenna drive to stop antenna movement when predetermined force levels to longitudinal movement are encountered. The switch has two actuator arms operated by actuator tabs maintained in spaced relation by a primary spring. A secondary spring urges one actuator tab against the primary spring. The actuator tabs are movable longitudinally in response to longitudinal movement of an electric motor driven worm shaft to open one switch at a predetermined force level and the other switch at a higher predetermined force level, to stop the motor, such as when respective full extension or retraction of the antenna is reached.

REFERENCES:
patent: 2407537 (1946-09-01), Chapman
patent: 3221118 (1965-11-01), Hoover
patent: 3369087 (1968-02-01), Eller
patent: 3616884 (1971-11-01), Balz
patent: 3703673 (1972-11-01), Balz
patent: 3930133 (1975-12-01), Sulzer
patent: 4153825 (1979-05-01), Flora

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