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:
May. 30, 1978
Filed:
Dec. 20, 1976
Gary Lee Dix, Rochester, MN (US);
Charles Christian Hanson, Pine Island, MN (US);
Robin Charles Jahnke, Pine Island, MN (US);
Francis Kong King, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A mechanism for moving an access arm carrying a magnetic transducer into the most appropriate position between pairs of consecutive flexible disks in a rotatable disk stack to assure that the proper disk is thereby accessed. The mechanism includes mechanism for preliminarily accessing each of the disks with a plurality of steps between consecutive disks in the stack and filling a position register with a unique identification number from each disk and with numbers of the steps corresponding to each of the disk numbers and mechanism for averaging the step numbers corresponding to each of the disks and placing the average step number in an access table to correspond with each of the disk numbers so that the access arm may be stepped to the step number listed for each of the disks in the access table for a reading or writing action using the transducer.