Register position sensing and controlling apparatus
US4488152A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1982 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Feb 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D4/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A visually and electronically readable motor driven register has a plurality of dependently rotatable, coaxial, incrementally positionable, number wheels which each carry a movable electrode fixed in a predetermined position relative to the numbers on each wheel. Adjacent each movable electrode is inserted a fixed plate which carries a plurality of stationary electrodes, each corresponding to a number on the wheel and disposed circumferentially around a stationary main electrode which is capacitively coupled to the movable electrode. When a number on a wheel is visually readable, the movable electrode will be positioned so as to be capacitively coupled only to the stationary electrode corresponding to the readable number. A microprocessor provides pulses sequentially to the stationary electrodes of each wheel, and checks for a coincident processed output from the main electrode of the first wheel. If there is a processed output indicating capacitive coupling between stationary and movable electrodes, the microprocessor retains the electrode number indicative of the readable number of the first wheel and checks for a coincident processed output from the main electrode of the second …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.