Light counting system for convex articles
US4877954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1986 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Sep 22, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06M7/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for counting hangers having a convex surface includes a housing having a central light source carried by the housing for projecting a light beam on the convex surface. A pair of spaced light detectors is positioned on the housing substantially on opposed sides of the central light source, the spaced light detectors detect light reflected from the convex surface. A detecting circuit is connected to the pair of spaced light detectors and detects the sequence of reflected light beams, and then determines whether the detected sequence is a sequence of reflected light beams characteristic of the relative displacement of the housing and the convex surface when the housing or the convex surface is displaced in substantially the direction of the space between the pair of opposed light detectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.