Keyhole-less electronic lock
US4031434A · kind A · utility
62Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Dec 29, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7062
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An inductively coupled electronic lock system wherein a key unit receives binary multiple bit data and generates a binary frequency modulated carrier which is input to a transmitter inductor. A lock unit of the system has an inductive pick-up which compares the received sequence of binary signals with a predetermined sequence of binary signals so that upon a proper correspondence a motor opens the lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.