Repertory dialing system

Claim 1

IN A REPERTORY DIALING SYSTEM, IN COMBINATION, A HOUSING, MAGNETIC STORAGE MEANS WITHIN SAID HOUSING, A PICK-UP AND RECORDING HEAD DISPOSED ADJACENT SAID MAGNETIC STORAGE MEANS FOR SCANNING THE LATTER, OSCILLATOR MEANS HAVING AT LEAST TWO OUTPUT FREQUENCIES OPERATIVELY CONNECTABLE TO SAID HEAD, MANUALLY OPERABLE PULSE-FORMING MEANS FOR ENERGIZING SAID OSCILLATOR MEANS, THEREBY RECORDING A TRAIN OF PULSES ON SAID STORAGE MEANS, AMPLIFIER MEANS OPERATIVELY CONNECTABLE WITH SAID HEAD FOR RECEIVING PULSES PICKED UP THEREBY, RELAY MEANS ENERGIZED BY SAID AMPLIFIER MEANS FOR INTERRUPTING A TELEPHONE CIRCUIT, THEREBY DIALING A TELEPHONE NUMBER CORRESPONDING TO SAID TRAIN OF PULSES, AND SWITCH MEANS IN CIRCUIT WITH SAID OSCILLATOR MEANS AND SAID HEAD FOR SELECTIVELY APPLYING PULSES OF ONE OF SAID FREQUENCIES THERETO, SAID AMPLIFIER MEANS BEING PROVIDED WITH A FILTER CIRCUIT CONNECTED TO SAID HEAD, SAID FILTER CIRCUIT INCLUDING AN INDUCTIVE BRANCH AND A CAPACITIVE BRANCH COMPRISING A PLURALITY OF CAPACITORS, SAID SWITCH MEANS HAVING CONTACTS FOR SELECTIVELY CONNECTING ANY OF SAID CAPACITORS IN CIRCUIT WITH SAID INDUCTIVE BRANCH, THEREBY TUNING SAID FILTER CIRCUIT TO SAID ONE OF SAID FREQUENCIES.