Apparatus for determining the shoe size corresponding to a foot
US4294014A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1980 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Mar 27, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to an apparatus for determining shoe size by examination of a foot, which device is portable, consumes relatively little energy and is entirely free of mechanical components. The apparatus is of the type in which radiant energy emitters and radiant energy sensors are provided in opposed, spaced relationship and measurement is achieved by interposing the foot therebetween. Discrete emitters and sensors are provided along the length and width of the foot in dedicated emitter/sensor pairs which are spaced from other such pairs by a distance not exceeding the dimensional difference between consecutive shoe sizes. In various embodiments, correlation is maintained between emitter/sensor pairs through spatial arrangement, time division, multiplexing and combinations thereof, as well as through diverse modulation. At the same time, correlation between adjacent pairs is kept low to avoid cross-interference effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.