Apparatus for detection of rotational angle and number of rotations of a rotary body
US4053826A · kind A · utility
24Cited by
6References
1Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 30, 1976 |
| Grant date | Oct 11, 1977 |
| Priority date | — |
| Expiry date | Mar 30, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG12B17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The specification discloses a first and a second rotary disk fixed together, each disk having a magnetic pole on its circumference, which disks rotate in the vicinity of a fixed magnetic head; the fixed magnetic head provides an electrical output signal each time a magnetic pole passes near it and, thus, said electrical output signal indicates a rotational angle and/or the number of rotations of said disk. Said magnetic head operates on a new principle developed from parametric excitation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.