Key-controlled electromagnetic operating mechanism for a lock and the like
US4280118A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1979 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Dec 14, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7904
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An operating mechanism for a lock and the like is operated by means of a key on which permanent magnets may be secured in available magnet positions of a fixed pattern of such positions, selected positions being occupied by magnets. A reading device includes a reader body and a guide for guiding the key into a predetermined position in which respective sensors are contiguously adjacent each available magnet position and respond to the presence of a magnet in the adjacent position by generating an electrical signal. The several signals are compared with a reference signal, and an operating signal is generated by a comparator connected to the sensors and to the source of the reference signal when the sensor signals agree with the reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.