Mechanical digital lock
US4274272A · kind A · utility
11Cited by
5References
23Claims
0Family size
Inventors
Key dates
| Filing date | Sep 22, 1978 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Sep 22, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7311
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Mechanical digital lock operable through a series of mechanical operations actuated by the depression of digital keys comprises an intellectual combination of essential mechanisms including a plurality of keys, digital selectors, identifiers, locking means and automatic resets. The lock cannot be opened unless the predetermined digitals are sequentially depressed. Once the lock is opened, it is automatically reset. A change of combination of digitals can easily be manually effected without any tool. With its novel structure, it is highly reliable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.