Drive roller torque reference cartridge
US5337608A · kind A · utility
5Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1992 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Dec 18, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L25/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A drive roller torque reference cartridge for calibrating a drive force tester. The reference cartridge uses a magnetic hysteresis brake assembly to controllably resist the rotation of the cartridge drive roller. The magnetic hysteresis brake assembly includes a cylindrical permanent magnet within the drive roller and a coaxial remanently magnetizable sleeve surrounding the drive roller. The drag created by the reference cartridge is substantially independent of the temperature and rotational speed of the drive roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.