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Device for measuring ovulation

  • US 4,148,304 A
  • Filed: 11/29/1976
  • Issued: 04/10/1979
  • Est. Priority Date: 11/29/1976
  • Status: Expired due to Term
First Claim
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1. A device for deriving improved data for determining the time of ovulation of a female subject, said device comprising in combination means for measuring a predetermined voltage potential and adaptable for placement between two spaced apart locations on the body of the subject, means for measuring a pedetermined temperature of the subject and adaptable for placement at a predetermined location on the body of the subject, means for indicating said voltage potential and said temperature thereby permitting determination of the time of ovulation of the subject, said predetermined location for measuring the predetermined temperature of the subject is the tympanic membrane in an ear of the subject, said spaced apart locations on the body for measurement of said predetermined voltage potential are the forehead and fingertip of said subject, said means for measuring said predetermined voltage potential includes electrodes placed in contact with the body of the subject at said predetermined locations, said means for measuring said predetermined temperature includes a thermistor placed in contact with the body of the patient, and said indicating means includes electronic means comprising a pair of high input resistance amplifiers having inputs connected to said electrodes, a tuned filter network receiving an input from an output of said resistance amplifiers, meter means for receiving an input from the output of said filter network to visually display an output which indicates the voltage potential on said electrodes, a temperature sensitive bridge having four legs with resistors in three legs thereof and said thermistor as the forth leg thereof, and a voltage potential across two legs thereof with an output from said temperature supplied from across two alternate legs thereof, an amplifier to receive the output from said temperature sensitive bridge and supply an input to said meter means for visually displaying an output which indicates the temperature of said thermister.

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