Apparatus for determining the shoe size corresponding to a foot

Details Apparatus for determining the shoe size corresponding to a foot Apparatus for determining the shoe size corresponding to a foot

1980-03-27

1981-10-13

Little, Willis

Geometrical instruments

Apparel

Footwear

33 3B, A43D 102

Patent

active

042940141

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.

REFERENCES:
patent: 3066417 (1962-12-01), Samuels
patent: 3328882 (1967-07-01), Blivice
patent: 4190959 (1980-03-01), Darvin

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