Electronic bathroom scale apparatus using planar coil sensors
US4503922A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1983 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | May 26, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G19/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic bathroom scale employs a low profile planar coil position sensor which responds to the positioning of a pivotable lever system. The levers are coupled to a platform which moves in the vertical direction as a weight is placed upon the top or supporting platform of the scale. The sensor provides variable amplitude or frequency proportional to the weight on the scale. The output signal is processed so that a direct reading of the weight is displayed by means of a digital display. The circuitry described serves to compensate for the nonlinearity of the transducer while further providing other compensation to eliminate environmental effects such as temperature and other factors from affecting the direct display of weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.