Electronic beat producing device

Claim 1

AN ELECTRONIC METRONOME COMPRISING A TRANSISTOR HAVING EMITTER, BASE AND COLLECTOR TERMINALS, MEANS PROVIDING A SOURCE OF DIRECT CURRENT VOLTAGE, A TRANSFORMER HAVING A PRIMARY COIL CONNECTED BETWEEN SAID COLLECTOR TERMINAL AND ONE SIDE OF SAID VOLTAGE SOURCE AND ALSO HAVING A SECONDARY COIL CONNECTED BETWEEN SAID BASE TERMINAL AND THE OTHER SIDE OF SAID VOLTAGE SOURCE, SAID PRIMARY AND SECONDARY COILS BEING SO ARRANGED AS TO PROVIDE AT LEAST PART OF A REGENERATIVE FEEDBACK PATH BETWEEN SAID COLLECTOR AND BASE TERMINALS WHICH CAUSES OSCILLATION IN THE CURRENT FLOWING THROUGH SAID COLLECTOR TERMINAL, A RESISTANCE AND A CAPLACITANCE CONNECTED IN PARALLEL BETWEEN SAID EMITTER TERMINAL AND SAID OTHER SIDE OF SAID VOLTAGE SOURCE FOR ALTERNATELY QUENCHING AND PERMITTING SAID OSCILLATIONS OF SAID COLLECTOR CURRENT SO AS TO PRODUCE SUCCESSIVE BURTS OF SUCH OSCILLATIONS, SAID TRANSFORMER INCLUDING AN IRON CORE HAVING AN ARMATURE MOVABLE IN RESPONSE TO FLUX CHANGES PRODUCED BY ENERGIZATION OF SAID TRANSFORMER BY SAID BURSTS OF OSCILLATIONS, AND A SOUNDING DEVICE CONNECTED TO SAID ARMATURE FOR CONVERTING THE MOVEMENT OF SAID ARMATURE INTO AUDIBLE SOUNDS.