Electronic weighting apparatus with calibration weight arrangement
US5148881A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1991 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Jul 8, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G23/012
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Electronic weighing apparatus includes a main scale housing (1) within which is arranged a calibration weight housing (33, 133) containing a calibration weight (75, 175) operable between weight-applying and weight-removed conditions relative to horizontal projections (79, 179) that extend from load receiver (15) through wall openings (81, 181) into the calibration weight housing. The calibration weight is operable by a carrier member (57, 157) that is vertically movable by means of a pair of horizontally spaced wedge-shaped lifting members (39, 139) that are displaced toward and away from each other, respectively, by a spindle (41) having threaded portions (43a, 43b) of opposite pitch, which spindle is driven by a reversible motor (53).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.