Method and means for moving recording heads in disc-type recorders
US4005493A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Feb 25, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19902
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data recorder/reproducer device, particularly for utilizing flexible magnetic disc media, is adapted to carry a recording head along at least one side of the disc. Translational drive means including a lead screw or worm driven by a stepper motor has a follower mounted thereon to which the recording heads are connected, for movement across the face of the disc generally radially thereof. Position-retaining means are provided for the follower, biased between it and the lead screw with sufficiently high spring force to prevent overtravel of the follower and to maintain accurate positioning of the follower and the heads moved thereon, and having a spring rate which prevents decoupling of the position-retaining means during rapid starts and stops of the lead screw. As a result, during each time interval between segments of rotation of the worm, the stepper motor may be de-energized, thereby eliminating a primary source of unnecessary and undesired heat, and at the same time reducing power consumption, leading to improved reliability and generally superior performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.