Film reader
US4402583A · kind A · utility
Inventors
Key dates
| Filing date | Aug 3, 1981 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Aug 3, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/116
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The film reader has a substantially cubic housing one wall of which is formed with a projection screen, an intake slot for a film to be projected, a focus control knob and two slots for position control levers movable along mutually normal axes near the screen. The transmission means between a film holder and respective control levers include a longitudinal carriage movable on two guiding tracks along one axis and supporting a transverse carriage for a transverse movement along the other axis. Each lever is pivotable about a fixed pivot point in mutually normal planes and is provided with an equalizing lever cooperating with a pin and slot guide. One control lever has an equalizing elbow lever hinged to a transmission lever extending transversely to the control lever and coupled to one side of the longitudinal carriage. The other control lever is coupled to the transverse carriage which supports the film by means of a closed loop Bowden wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.