Intrusion detection system for operating industrial machines with variable sensitivity
US4818866A · kind A · utility
30Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Nov 10, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16P3/144
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An optical detection system of the sort adapted to enable and/or disable the operation of an associated industrial machine when an appropriate intrusion is detected. The optical intrusion detection system is adapted to have a variable sensitivity, whereby it can be set to respond to the intrusion of an object of a first size during one phase of operation of said machine and to an object of a second size during another phase of the operation of said machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.