Escalator handrail obstruction device with sensors

US4976345A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Willy Adrian · Bad Eilsen, DE
• Detlev B. Moldenhaur · Stadthagen, DE

Key dates

• Filing date: Sep 29, 1989
• Grant date: Dec 11, 1990
• Expiry date: Sep 29, 2009

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B29/04
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An elastomeric collar is positioned at the mouth of the escalator handrail reentry housing. The collar will deform when subjected to forces running parallel to the direction of travel of the handrail. Sufficient deformation of the collar will activate a switch which turns the escalator off. if an object enters the reentry housing and becomes lodged therein against the handrail, the forces generated thereby normal to the direction of travel of the handrail will activate a pressure sensor which in turn will turn the escalator off.