Therapeutic pulse generation and control circuit

Claim 1

ELECTROTHERAPEUTIC APPARATUS, COMPRISING A POWER RADIATING HEAD INCLUDING A SINGLE TURN PRIMARY COIL, A MULTIPLE TURN SECONDARY COIL AND A CONDENSER CONNECTED WITH THE SECONDARY COIL TO PROVIDE A TANK CIRCUIT, AND INPUT CIRCUIT MEANS FOR THE HEAD INCLUDING AN OSCILLATOR GENERATING AN OSCILLATING ELECTRICAL SIGNAL WHICH IS A SUBMULTIPLE OF APPROXIMATELY THE FREQUENCY 27.12 MEGACYCLES, FIRST MEANS TO AMPLIFY AND INCREASE SAID SIGNAL FREQUENCY TO AN OPERATION FREQUENCY OF ABOUT 27.12 MEGACYCLES, VIBRATOR MEANS COUPLED TO SAID FIRST MEANS TO INTERRUPT THE TRANSMISSION OF SAID OPERATING FREQUENCY SIGNAL AT PREDETERMINED INTERVALS THEREBY TO CREATE A SEQUENCE OF HIGH FREQUENCY PULSES TRANSMITTED BY SAID FIRST MEANS, PRIMARY CONTROL MEANS INCLUDING A FIRST STEP SWITCH COUPLED TO SAID VIBRATOR MEANS TO CONTROL THE OPERATION THEREOF SO AS TO PROVIDE STEPWISE SELECTION OF THE RECURRENCE INTERVAL OF SUCCESSIVE PULSES, A POWER AMPLIFIER COUPLED TO RECEIVE AND AMPLIFY THE PULSES TRANSMITTED BY SAID FIRST MEANS FOR TRANSMISSION TO SAID PRIMARY COIL OF THE HEAD, AND SECONDARY CONTROL MEANS INCLUDING A SECOND STEP SWITCH COUPLED TO SAID POWER AMPLIFIER TO CONTROL THE OPERATION THEREOF SO AS TO PROVIDE STEPWISE SELECTION OF THE TRANSMITTED PULSE AMPLITUDE.