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Ski stress signaling device

  • US 4,516,110 A
  • Filed: 08/09/1982
  • Issued: 05/07/1985
  • Est. Priority Date: 08/09/1982
  • Status: Expired due to Fees
First Claim
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1. A ski stress signaling device comprising a plurality of strain gauges mounted on the top surfaces of a pair of skis and adapted to measure lengthwise strains in the said top surfaces of the said pair of skis;

  • a plurality of electrical conductor wires adapted to connect the said plurality of strain gauges to form a Wheatstone bridge circuit;

    resistance compensation means adapted to compensate for any differences in the magnitudes of zero-stress resistances of the strain gauges of the said plurality of strain gauges;

    electrical conductor means adapted for connecting a direct current power supply to the said Wheatstone bridge circuit;

    first and second bridge output means;

    a first amplifier means adapted to be connected to a direct current power source and adapted to amplify an output voltage of the said Wheatstone bridge circuit;

    a second amplifier means adapted to be connected to a direct current power source and adapted to amplify an output voltage of the said Wheatstone bridge circuit;

    a third amplifier means adapted to invert an output voltage of the said second amplifier means;

    a first light emitting diode driver circuit adapted to be driven by an output voltage of the said first amplifier means and having a plurality of output means and adapted to be connected to a direct current power source wherein each of the said output means of the said plurality of output means is connected by electrical conductor means to an anode of a light emitting diode of a first plurality of light emitting diodes each having a cathode that is connected by electrical conductor means to a direct current power source;

    a second light emitting diode driver circuit adapted to be driven by an output voltage of the said third amplifier means and having a plurality of output means and adapted to be connected to a direct current power and wherein each of the output means of the said plurality of output means is connected by electrical conductor means to an anode of a light emitting diode of a second plurality of light emitting diodes each having a cathode that is connected by electrical conductor means to a direct current power source;

    a plurality of direct current power sources adapted to operate the aforesaid Wheatstone bridge circuit, the said first, second and third amplifier means, the said first and second light emitting diode driver circuits, and the said first and second pluralities of light emitting diodes; and

    a pair of goggles having mounted on a first portion of the perimeter thereof the said first plurality of light emitting diodes and having mounted on a second portion of the perimeter thereof the said second plurality of light emitting diodes.

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