The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 1984
Filed:
Nov. 01, 1982
Ronald J Frias, Milwaukee, WI (US);
David Jagielski, Kewaskum, WI (US);
Micron Corporation, Iron Ridge, WI (US);
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 rotation. A solid state control includes a switch unit having an interlock to insure proper setting of the output clutches before switchover of the drive systems.