Apparatus for securing a dangerous zone
US7563039B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 2006 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Nov 29, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16P3/144
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Apparatus with an optical system for monitoring a protected field has at least two opposing optical units arranged so that the protected field is between them. Each optical unit includes a picture-taking unit and a processing and switching unit that is operatively connected with the picture-taking unit for generating a danger signal. A marking is applied to each optical unit, and each picture-taking unit is arranged so that the marking on an opposite side of the protected field can be viewed by the first-named picture-taking unit. A processing and switching unit includes a comparison unit for comparing a picture with a reference picture. Each optical unit further has at least one lighting unit for illuminating the oppositely positioned marking on the oppositely positioned optical unit. The picture-taking unit, the markings and the lighting units are arranged in mutual alignment and on a common housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.