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US 4,619,355 AGranted
Escalator handrail entry safety switch actuator
AssigneeOtis Elevator Company
InventorsWilly Adrian, Ralf Holzhauer
Life of this patent
Estimating the term…
Abstract
Two generally U-shaped pieces are adapted to fit together end-to-end so that when they are nested in an appropriately-sized passage in an escalator entry box, they cooperate to form a generally cylindrical actuator that at one end has brushes protruding through the opening of the entry box and that is slideable in the entry box over the handrail to actuate a safety shutoff switch located therein in the unlikely event of a foreign object being pulled by the handrail into the entry box.
Claims2
An actuator for the handrail entry safety switch in the entry box of an escalator comprising:
- two generally U-shaped pieces disposed end-to-end with the bases of the legs of one piece juxtaposed with the bases of the legs of the other piece so as to form a generally cylindrical actuator, the inside of which is sized so as to permit the handrail to pass therethrough and the outside of which is sized and shaped so as to nest within, and be guided longitudinally by the entry box.
Dependencies are inferred from the claim text.