Averaging system

Claim 1

APPARATUS FOR COMPUTING THE AVERAGE VALUE OF A PHYSICALLY EXPRESSED VARIABLE FOR A PERIOD OF TIME COMPRISING, MEANS FOR DETERMINING SAID PERIOD OF TIME PROVIDING A FIRST TIMING SIGNAL AT THE BEGINNING OF SAID PERIOD AND A SECOND TIMING SIGNAL AT THE END OF SAID PERIOD; AN OSCILLATOR ADAPTED TO OSCILLATE AT ANY PRESELECTED ONE OF A RANGE OF FREQUENCIES; A PULSE GENERATOR COUPLED OF SAID OSCILLATOR ADAPTED TO PROVIDE AN OUTPUT PULSE OF PREDETERMINED AMPLITUDE AND LENGTH IN RESPONSE TO EACH OF SAID OSCILLATIONS; INTEGRATION MEANS OPERATIVE IN RESPONSE TO SAID FIRST TIMING SIGNAL COUPLED TO SAID PULSE GENERATOR AND ADAPTED TO PROVIDE AS AN OUTPUT A VOLTAGE PROPORTIONAL TO THE SUM OF SAID GENERATOR PULSES; A SLIDEWIRE POTENTIOMETER HAVING A MOVABLE ARM, THE POSITION OF SAID ARM ON SAID SLIDEWIRE BEING REPRESENTATIVE OF THE VALUE OF SAID PHYSICALLY EXPRESSED VARIABLE; MEANS FOR APPLYING SAID GENERATOR PULSES ACROSS SAID SLIDEWIRE; SECOND INTEGRATION MEANS OPERATIVE IN RESPONSE TO SAID FIRST TIMING SIGNAL FOR