Sensing edge for a door and method of making the same
US5072079A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Dec 19, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/51
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sensing edge for causing a closing door to open by actuating a device upon force being applied to the sensing edge. The sensing edge includes a first sheet of resiliently compressible material, a first sheet of electrically conductive material, a layer of non-conductive material, a second sheet of electrically conductive material, a second sheet of resiliently compressible material and an elongate inner core arranged in the recited order. The inner core has a predetermined elastic compressibility which is selected in accordance with the desired sensitivity of the sensing edge, such that the sensitivity of the sensing edge directly corresponds to the elastic compressibility of the inner core. The first and second sheets of flexible, electrically conductive material are spaced apart by the layer of non-conductive material and present opposed portions to each other through an opening in the layer of non-conductive material whereby upon the application of force to the sheath, the inner core compresses until its elastic compressibility is less than the elastic compressibility of said first and second layers of resiliently compressible material and said layer of non-conductive material…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.