US 5,729,905 A · Foot measuring apparatus and circuitry to eliminate multiplexes and demultiplexers

Abstract

The invention pertains to an apparatus for measuring a foot's length and width to correspond to a shoe size and a method to eliminate multiplexers and demultiplexers in circuits. The apparatus is a low profile self-contained apparatus comprising a transducing medium, a microcontroller, a reference impedance element, a signal amplifier, an analog to digital conversion circuit, and a display to generate and display foot sizing data. A microcontroller unit is connected directly to the hybrid multiplexing circuit which! contains algorithms which solve a set of linear equations to indirectly determine the electronic image of a foot. The shoe size is then calculated using a sizing algorithm and then displayed on a display which is connected to the output of the microcontroller unit.

Claims24

Dependent claims

An apparatus for measuring and analyzing a foot, said apparatus comprising:

a transducing medium to convert a foot pattern to electrical signals;
a microcontroller coupled to said transducing medium for applying electrical signals to said transducing medium and for processing said electrical signals to generate foot sizing data;
a reference impedance element coupled with said microcontroller for use by said microcontroller as a reference for assessing the electrical status of the transducing medium;
and
a display for displaying foot sizing data generated by the microcontroller.

2 more elements

Dependencies are inferred from the claim text.

Foot measuring apparatus and circuitry to eliminate multiplexes and demultiplexers

Life of this patent

Foot measuring apparatus and circuitry to eliminate multiplexes and demultiplexers

Life of this patent

Abstract

Claims24