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:
Apr. 11, 1989
Filed:
Apr. 11, 1986
William F Witt, Palo Alto, CA (US);
Ampex Corporation, Redwood City, CA (US);
Abstract
A bidirectional transfer mechanism is provided for independent or simultaneous X-axis and Y-axis precision displacement of a mobile component, such as a video cassette pick-up unit for retrieving or returning video cassettes from a cassette library. The transfer mechanism comprises an upright column assembly supported on a machine frame for X-axis displacement and carrying the pick-up unit for Y-axis displacement. A first drive cable is connected to the upper and lower ends of the column assembly and threaded over a first set of pulleys on the machine frame, with a portion of the first cable being wrapped about a motor-driven winding drum for displacing the column assembly in the X-axis direction. A second drive cable has a portion thereof wrapped about another motor-driven winding drum and is threaded about a second set of pulleys on the column assembly and the pick-up unit, whereby drum rotation displaces the pick-up unit along the column assembly in the Y-axis direction.