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US 4,863,006 AGranted
Automatic shutoff apparatus for an escalator
AssigneeInventio AG
InventorsNabil Kotkata, Mark D. Blondiau, Gerhart Rulke
Life of this patent
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AssigneeInventio AG
InventorsNabil Kotkata, Mark D. Blondiau, Gerhart Rulke
Estimating the term…
A pair of light barriers are mounted on a pair of spaced apart balustrade sockets located on opposite sides of an endless step conveyor-type escalator. The light barriers are positioned at the transition of upper and lower transisition arches to an inclined run of the conveyor. The light barriers each include a transmitter and receiver for emitting and receiving a light beam transversely to the direction of travel of the conveyor. The light beam is interrupted by side shields on the conveyor steps. An opening is formed adjacent a leading edge of each side shield and one or more openings are formed adjacent a trailing edge of each side shield. The trailing edge openings are formed as oblong holes each with a longitudinal axis extending with respect to the tread of the step at the same angle as the inclination of the inclined run of the escalator with respect to the horizontal. The oblong holes are formed at different angles corresponding to typical angles and inclination such that the side shields can be used with different standard escalator installations.
An automatic shutoff apparatus for an escalator for the initiation of the stopping of an endless step conveyor having a plurality of steps with treads supported by two lateral flat link chains and guided between two balustrade sockets, the escalator having a lead which can be stepped upon including two horizontal runs, an inclined run and two transition arches between the inclined run and the horizontal runs, comprising:
An improvement in an escalator having a plurality of steps supported by a pair of spaced apart link chains between a pair of balustrade sockets to form a lead and a return of an endless step conveyor, the lead including upper and lower horizontal runs connected to opposite ends of an inclined run by transition arches, the improvement comprising:
A method of generating a signal for use in automatically shutting off an escalator having an endless step conveyor positioned between a pair of balustrade sockets, comprising the steps of:
Dependencies are inferred from the claim text.