Starting circuit and method for escalators and moving walks
US5186300A · kind A · utility
8Cited by
0References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1992 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Jul 6, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B29/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved keyswitch circuit for an escalator or moving walkway senses the normal (center or lateral) position of the keyswitch and, if the keyswitch does not return to its normal position after a selected event such as a selected normal starting interval, then the safety circuit is opened and the escalator or moving walk is stopped; the escalator or moving walkway can be restarted only after first returning the keyswitch to its normal position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.