Patent · US Expired

Apparatus for positionally controlling a movable head assembly

US4031443A · kind A · utility

34Cited by

5References

7Claims

0Family size

Assignee

Honeywell Bull Inc. · FR

Inventors

Jacques Droux · Montfermeil, FR
Rene Jean Rodier · Bobigny, FR

Key dates

Filing date	May 22, 1975
Grant date	Jun 21, 1977
Priority date	—
Expiry date	May 22, 1995

Classification

Technology area (CPC G)Physics
CPC primaryG05B19/232
WIPO fieldControl
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.