Dual electronic lock for human passage door
US5136870A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Feb 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7299
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic door lock is provided with a single control knob used for entering a predetermined combination through manipulation of the knob in a first arc of rotation, the code being entered by pushing the dial inwardly to bring a push pad into contact with individual ones of an arcuate array of electrical switches provided on a printed circuit board within the lock dead housing, the release of the door locking bolt being accomplished after entry of the predetermined code by further manipulation of the control knob through remaining portions of knob rotation which are unavailable until after entry of the predetermined code. A digitally operated code input pad assembly is also provided to enter such code and a second code to open a second lock mechanism associated with the door spring bolt giving two levels of security for the human passage door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.