Lock system
US4838052A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1987 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Jul 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electromechanical key safe includes a housing with a region defined therein. The region can be closed by means of a pivoted door attached to the housing. The door carries an electronic control system as well as a manually operable keypad. In response to entry of a sequence of characters through the keypad, the control system compares the entered sequence to a predetermined sequence of valid combinations. If a match is detected, the matched combination is checked to determine whether or not it is enabled. In the event that a matched combination is enabled, the lock system can be unlocked or actuated. In the event that a predetermined and matched combination is not enabled, the lock system cannot be unlocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.