Escalator missing step detection
US5316121A · kind A · utility
10Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Nov 25, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B29/005
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An induction proximity sensor 26 is wider than a normal gap between moving escalator steps 10, 12 so that the inductive proximity sensor 26 is always in front of one step or another and provides a constant signal, when steps 10, 12 are passing the inductive proximity sensor 26, and stops the steps 18, 12, 14, 16 when the inductive proximity sensor 26 detects no steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.