Load cell
US5359902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Jul 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the load cell disclosed herein, relative displacement between bridging members or end caps mounted at different points along the axis of an elastic hollow cylinder is sensed by means of a variable reluctance transducer employing a pair of magnetically permeable core elements. One of the core elements is mounted on one of the bridging members and the other core element is C-shaped and mounted on the other bridging member with the ends of the C-shape in close proximity to the first core member thereby providing magnetic gaps whose widths are aligned with the cylinder axis. Windings around the ends of the C-shaped core provide electrical connection for an inductance which is variable as a function of the widths of the gaps and thus also of the axial displacement between the bridging members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.