Escalator combplate stop switch assembly
AssigneeOtis Elevator Company
InventorsJames A. Rivera, Dat Nguyen
Life of this patent
Estimating the term…
Abstract
A power switch assembly is operably connected to the combplate of an escalator for selectively shutting off the escalator in the event of entrapment of some object between the steps and combplate. When an object becomes wedged between the steps and combplate, the latter will be lifted or pushed upwardly away from the steps. The upward movement of the combplate operates a power interruption switch to stop further movement of the steps and handrail. The combplate is supported on the truss by spring assemblies which serve to effectively lower the weight of the combplate so that upward movement of the latter is more readily accomplished. The assembly can be retrofitted onto older existing escalators with heavier combplates than are found in newer equipment.
Claims18
An escalator or moving walkway assembly comprising:
- a) an exit landing;
- b) a plurality of interconnected steps powered by an electric motor and movable along a passenger-conveying path of travel terminating at said exit landing;
- c) a combplate means disposed at said exit landing whereby said steps pass beneath said combplate, said combplate means forming a platform on which passengers alight from said steps, said combplate means being mounted for vertical movement relative to said steps in response to entrapment of foreign matter between said steps and said combplate means;
- and
- d) spring means operably connected to said combplate means for vertically preloading said combplate means so as to lessen the effective weight of the latter.
An escalator or moving walkway assembly comprising:
- a) an exit landing;
- b) a plurality of interconnected steps powered by an electric motor and movable along a passenger-conveying path of travel terminating at said exit landing;
- c) a combplate means disposed at said exit landing whereby said steps pass beneath said combplate means, said combplate forming a platform on which passengers alight from said steps, said combplate means being mounted for vertical movement relative to said steps in response to entrapment of foreign matter between said steps and said combplate means;
- d) switch means operably connected to said electric motor, said switch means being positioned adjacent to said combplate means;
- and
- e) a rocker member mounted adjacent to said combplate means and said switch means, said rocker member being mounted for pivotal movement about a pivot axis, said rocker member having a first arm for contacting said switch means and a second arm for contacting said combplate means, and said rocker member being operable to pivot about said pivot axis to actuate said switch to interrupt power to the electric motor in response to entrapment-induced upward movement of said combplate means.
An escalator or moving walkway assembly comprising:
- a) an exit landing;
- b) a plurality of interconnected steps powered by an electric motor and movable along a passenger-conveying path of travel terminating at said exit landing;
- c) a combplate disposed at said exit landing whereby said steps pass beneath said combplate, said combplate forming a platform on which passengers alight from said steps, said combplate being mounted for vertical movement relative to said steps in response to entrapment of foreign matter between said steps and said combplate;
- d) switch means operably connected to said electric motor, said switch means being positioned adjacent to said combplate;
- and
- e) a rocker member mounted adjacent to said combplate and said switch means, said rocker member being mounted for pivotal movement about a pivot axis, said rocker member having a first arm for contacting said switch means and a second arm for contacting a member attached to said combplate, and said rocker member being operable to pivot about said pivot axis to actuate said switch to interrupt power to the electric motor in response to entrapment-induced upward movement of said combplate.
Dependencies are inferred from the claim text.