Microfilm retrieval system
US4353642A · kind A · utility
Inventor
Key dates
| Filing date | Apr 23, 1980 |
| Grant date | Oct 12, 1982 |
| Priority date | — |
| Expiry date | Apr 23, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K17/0016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A microfilm cartridge storage, retrieval, and projection system is disclosed. The system includes a vertically-oriented cylindrical cartridge storage drum which has a plurality of overlying tiers, each tier including successive side-by-side compartments which are oriented along radials of the cylinder and are adapted to hold a microfilm cartridge. Cartridge receiving and projection head means are mounted proximate the compartments of the drum, and are adapted for receiving a cartridge from a compartment in operative opposition thereto and for optically projecting a selected film frame of the cartridge. Cartridge displacement means mounted proximate the compartments of the drum, are adapted for displacing a cartridge in operative opposition thereto, which is then engaged by the receiving and projection head means. Orienting means are provided to enable relative vertical displacement between the drum, and each of the cartridge receiving and projection head means and the cartridge displacement means. The orienting means also provide angular displacement of the drum about its axis relative to each of the foregoing means to thereby bring each such means in operative opposition to a comp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.