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US 4,689,456 AGranted
Key switch having cooperable cams which translate rotary motion to rectilinear
AssigneeAdams Elevator Equipment Company
InventorAdolf H. Martin
Life of this patent
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Abstract
A two-position key switch of modular construction including an electrical contact module, a lock module, and a halo module, with the lock module being mounted in the halo module to provide a subassembly which is fixed to the electrical contact module. First and second cam members respectively associated with the electrical contact module and the lock module translate rotary motion of a rotary core of the lock module to rectilinear motion of an actuator element of the electrical contact module.
Claims8
A two-position key switch of modular construction, comprising:
- an electrical contact module,
- a lock module,
- and a halo module,
- said electrical contact module including a housing, an actuator, a first cam member, actuator mounting means, and biasing means,
- said actuator having first and second axial ends, and a longitudinally extending recess which extends between said first and second ends, with the first axial end being open and with the second axial end being at least partially closed,
- said first cam member being disposed in the recess of said actuator, adjacent to the second axial end of said actuator,
- said actuator mounting means mounting said actuator in said housing for rectilinear motion along a predetermined longitudinal axis, between first and second axial limits,
- said biasing means being disposed to bias said actuator towards said first axial limit,
- said halo module including a cover, with said cover being mounted on the housing of said electrical contact module,
- said lock module including a rotatable element, a second cam member, and lock mounting means,
- said rotatable element having a first axial end adapted to receive an actuating key,
- and a second axial end, with said rotatable element being rotatable about a longitudinal axis which extends between said first and second axial ends,
- said second cam member being fixed to the second axial end of said rotatable element,
- said lock mounting means mounting said lock module in the cover of said halo module such that the second axial end of the rotatable element of said lock module extends through the open end of the recess in said actuator, to place said second cam member within said recess adjacent to said first cam member, such that said first and second cam members are engageable,
- said engageable first and second cam members being configured to cooperatively translate rotary motion of the rotatable element of said lock module to rectilinear motion of the actuator of said electrical contact module, to overcome the bias of said bias means and move the actuator towards the second axial limit.
12 more elements
Dependencies are inferred from the claim text.