Opto-electronic lock device
US4090175A · kind A · utility
22Cited by
7References
10Claims
0Family size
Inventor
Key dates
| Filing date | Feb 4, 1977 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Feb 4, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7593
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An opto-electronic, key-operated lock device means which provides a connection for one or more opto-electric circuits (control circuits employing light and logic for control of electrical circuits) as an incident to the insertion and operation therein of the proper key. The proper key is encoded for completion of predetermined light paths to photosensors coupled to decoder logic circuits for establishment and disestablishment of the opto-electrical circuits coincident with the use of the proper key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.