Information storage retrieval system
US3930992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Feb 19, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S209/939
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The specific information storage and retrieval system described herein stores 49,000 microfiches in a central file, any one of which may be viewed in a matter of seconds. More specifically, the central file uses an arrangement of 20 shelves mounted on a closed loop track, each holding 2,450 microfiches, each microfiche in turn having 50 or 60 separate images. When a particular microfiche is selected, the proper shelf is rotated into a predetermined position. Concurrently a viewing station including a transducer such as a film camera or a television camera is brought adjacent to the selected microfiche which is partially extracted from its storage location so as to be viewed by the transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.