Weigh scale
US4492281A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1982 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Mar 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G17/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The specification discloses an improved weigh scale of the dual beam type having large and small flow buckets adapted to receive a flow of fluid therein, and an encoder connected to a ball screw having a poise weigh driven by a drive motor for keeping the scale continually balanced while a fluid is being introduced into one of said flow buckets, and having a power supply circuit, a pulse encoder circuit, and a poise control circuit for operation thereof, the improvement including an improved poise control circuit having low gain with high integration for use during the run mode, but being switchable to a circuit having high gain and derivative action during the calibration mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.