Electronic lock
US3978376A · kind A · utility
20Cited by
1References
3Claims
0Family size
Inventor
Key dates
| Filing date | Sep 5, 1973 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Sep 5, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/0069
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic lock providing open/close commands to operate electrically controlled doors. Contacts operated in a predetermined sequence discharge and charge capacitors transfering charge along a capacitor chain to finally close an electronic switch. Contacts not part of the predetermined sequence briefly disable the lock when operated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.