Test cassette for measuring capstan azimuth angles
US4743990A · kind A · utility
0Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Dec 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/049
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Azimuth angle of the capstan of a magnetic-tape-cassette apparatus is measured using a cassette having a reference sensor which engages the cassette, and at least one measurement sensor which engages the cassette at a location spaced axially from the reference sensor. The measurement sensor includes an electrical measuring element such as a strain gauge which provides an indication of the position of the element with respect to the reference sensor. The azimuth angle can readily be computed using the known axial spacing between the sensors and the electrical value transmitted from the measurement sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.