Electromagnetic compensation weighing apparatus including preloading and load-responsive current components
US4099587A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Oct 14, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G21/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Weighing apparatus of the electromagnetic compensation type is disclosed, wherein the compensation coil means is continuously supplied with a first component of compensation current which at least partially compensates for the no-load preloading effect of the movable pan carrier system, said coil means being periodically supplied with a second component of compensation current which is a direct function of the magnitude of the load being weighed. Indicating means are provided which are responsive to the magnitude of the second current component to present a visual indication of the magnitude of the load being weighed. In one embodiment, separate sources of compensation current and counter pulses are provided, while in a second embodiment the compensation current is obtained from a pulse generator supplied with a high frequency voltage from the source which provides the counting pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.