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US 5,207,298 AGranted
Elevator rotary door interlock
AssigneeOtis Elevator Company
InventorsMichael P. Donohoe, Richard E. Kulak, Christian G. Tonna
Life of this patent
Estimating the term…
Abstract
An elevator door interlock has a camming surface which is in contact with a lead of an electrical circuit and has a bridge thereon. The camming surface rotates the bridge into contact with the lead if a hoistway door is locked and out of contact with the lead if the hoistway door is not locked.
Claims6
An elevator door interlock which bridges a lead of an electrical circuit to indicate that the elevator door is locked, said interlock comprising:
- a rotatable camming surface contacting said lead, and
- a bridge disposed upon said surface, said camming surface rotating the bridge into contact with the lead if said door is locked and out of contact with the lead if the door is not locked.
An elevator door interlock which bridges a lead of an electrical circuit to indicate that the elevator door is locked, said interlock comprising:
- a rotatable camming surface contracting said lead,
- a bridge disposed upon said surface, said means for rotating said camming surface to rotate said bridge into contact with said lead if said door is locked and out of contact with said lead if said door is not locked.
Dependencies are inferred from the claim text.