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:
Nov. 11, 1986
Filed:
May. 18, 1984
Yasuichi Hashimoto, Tokyo, JP;
Tomihisa Ogawa, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A controlling apparatus for achieving velocity control in the course of a seeking operation of the magnetic head includes an intended address register for storing intended track addresses. A microprocessor calculates the intended moving distance of the head on the basis of an intended track address applied from the intended address register and track pulses applied from a track detector circuit every time the head crosses a track on the magnetic disk. On the other hand, previously stored in a memory are plural kinds of velocity tables consisting of plural kinds of intended velocity data which correspond to the intended moving distance of the head. The microprocessor reads and sets from the memory appropriate intended velocity data which corresponds to the intended and calculated moving distance of the head. The head is moved by a carriage and performs its seeking operation at an appropriate velocity on the basis of the intended velocity data set by the microprocessor.