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US 5,203,430 AGranted
Elevator flat linear motor secondary
AssigneeOtis Elevator Company
InventorsTimothy J. Grinaski, Robin M. Miller
Life of this patent
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Abstract
A secondary of an elevator linear motor includes a highly conductive layer, the layer having a plurality of periodically spaced grooves disposed horizontally therein, the grooves providing space for thermal expansion of the layer and guiding current induced on said layer thereby increasing the efficiency of the motor.
Claims2
An elevator linear motor secondary, said secondary comprising:
- a support plate,
- a conductive, non-magnetic layer disposed upon said support plate, said layer having a plurality of spaced-apart slots, said slots not extending to edges of said layer to allow current induced upon said layer to extend around ends of said slots, said slots allowing said layer to expand and contract in plane.
An elevator linear motor, said motor comprising:
- a primary element, and
- a secondary element, said secondary element comprising:
- a support plate, and
- a conductive, non-magnetic layer disposed upon said support plate, said layer having a plurality of spaced-apart slots, said slots not extending to edges of said layer to allow current induced upon said layer by said primary element to extend around ends of said slots, said slots allowing said layer to expand and contract in plane.
1 more element
Dependencies are inferred from the claim text.