Number wheel counters
US5026973A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1989 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Jul 18, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06M1/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A number wheel counter has a worm wheel connected with the least significant number wheel. A worm gear engaged with the worm wheel is mounted for both rotational and translational movement about a spindle. Cam means are provided such that as the worm gear is rotated, it is also displaced bodily by the cam means so that the worm wheel remains unmoved. At the end of a defined travel of the cam means, the worm gear is returned rapidly to a rest position driving the worm wheel in the manner of a rack and pinion. In this way the number wheels are driven intermittently with the time interval during which the number wheels are between discreet number positions being minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.