Reel-to-reel drive system
US4456201A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Nov 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/43
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film reader includes individual drive systems for driving a storage reel to rewind a film strip and a take-up reel to unwind the film strip by pulling the film strip from the opposite reel. Each drive system is the same and includes a fast drive motor and a slow drive motor. A speed reduction pulley train has a first stage and a second stage connected in series with a first stage output pulley in drive coupling to an input pulley of the second stage by a one-way clutch. A slow speed motor is connected to the first stage. A one-way clutch connects a high speed motor in drive coupling to the opposite side of the input pulley. The output shaft is connected to the pulley train by a spring output clutch having a pulsed release control to disconnect the output shaft from the pulley train and permit free rotation thereof. The output clutch has a first drive coil wound on the shaft when driven and a second larger coil with the outer end turn slidably engaging a hub, which is reversely rotated to release the drive coil. Each one-way clutch is a simple wire coil wrapped about a shaft and having an end coupled to the driving member such that it winds the coil onto the shaft to transmit the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.