Web tension transducer arrangement
US4326424A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1980 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | Feb 25, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/107
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A web tension transducer device which is easily in-installed, has a high natural frequency, excellent linearity, and extremely low hysteresis. A twin beam type transducer having strain gages at the flex points of the beams is coupled to the shaft supporting the moving web through a self-aligning anti-friction bearing, the strain gages being so located and electrically connected that effects of friction in the bearing due to bending of the shaft are automatically cancelled out in the circuitry in which the strain gages are connected. The self-aligning bearing coupling is arranged to permit relative axial displacement between the shaft and the twin beam transducer for accommodating comparatively large amounts of shaft expansion. The bearing also may have a bearing surface liner comprised of a low coefficient of friction thermoplastic resin material such as teflon fiber or teflon fiber-filled acetal resin fabric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.