Elevator car top intrusion device
US5025895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1990 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Jan 9, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0031
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
There is provided a detection system for detecting attempted entry onto the shaft-side roof of an elevator cab which includes a power supply for supplying power to the system, a proximity detector in electrical connection with the power supply which is disposed proximate the roof of the cab for detecting an object entering a zone of detection including the top of the cab, the detector in a preferred embodiment including an optical source for generating a detection beam and a corresponding optical receiver for receiving the detection beam when it is diffused by an object entering the detection zone and for providing a detection signal when the object enters the detection zone, and detection indicator responsive to the detection signal for indicating an attempted entry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.