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. 21, 1977
Filed:
May. 22, 1975
Applicant:
Inventors:
Jacques Pierre Droux, Paris, FR;
Rene Jean Rodier, Bobigny, FR;
Assignee:
Compagnie Honeywell Bull (Societe Anonyme), Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
G05B / ; G11B / ;
U.S. Cl.
CPC ...
318561 ; 318617 ; 318687 ; 360 78 ;
Abstract
An apparatus for positionally controlling the movable head assembly of a magnetic disc memory unit. In a first state, the head assembly is accelerated under substantially free conditions. In a second or deceleration state, the assembly speed is compared with and regulated by a series of theoretical speeds set in accordance with the actual speed attained by the movable head assembly during the first state.