Temperature monitoring and display system

A monitoring system for monitoring the temperature levels of the body of a patient for extended periods, said system comprising:

• transducer means for sensing the temperature of the body of the patient under observation and for producing an output voltage in accordance therewith,
• a voltage controlled oscillator for producing an output whose frequency varies in accordance with the output voltage of said transducer means,
• an n-bit binary coded counter connected to said voltage controlled oscillator for producing an n-bit binary coded output representative of the temperature sensed,
• gating means,
• a shift register controlled by said gating means for storing the n-bit binary coded output of said counter over N cycles, said N cycles being repeated and said counter producing an N + 1 output following the Nth output thereof,
• an adder-divider circuit connected to the outputs of said register for summing N outputs stored thereby and for dividing the resultant sum by N to produce a digital signal representative of the arithmetic average of said N outputs,
• comparator means for comparing the output of said adder-divider circuit with the N + 1 output of said counter and for producing a first "normal" output when the difference between said outputs is less than a positive threshold level and for producing a second "abnormal" output when said difference exceeds said threshold level, and
• display means connected to the output of said comparator means.