Rotary drive for a data carrier
US5317241A · kind A · utility
3Cited by
12References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1991 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Mar 19, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data medium is driven by a brushless direct current motor and possesses control signals on a track which can be picked up by a sensing device and supplied to a switch arrangement for activation of the motor winding. The control signals on the track characterize at least those angular positions of the rotor with respect to the stator in which commutation is to be initiated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.