Timing and control circuit for welding apparatus

Claim 1

A CONTROL CIRCUIT COMPRISING: (A) A SOURCE OF SUBSTANTIALLY FIXED UNI-DIRECTIONAL VOLTAGE, (B) A FIRST SWITCHING MEANS WHICH IS NORMALLY CLOSED, (C) A CAPACITOR NORMALLY COUPLED TO SAID SOURCE VIA SAID FIRST SWITCHING MEANS, (D) INDUCTIVE MEANS HAVING A FIRST TERMINAL THEREOF COUPLED TO SAID CAPACITOR, (E) SECOND SWITCH MEANS IN SERIES WITH SAID CAPACITOR AND SAID INDUCTIVE MEANS AND BEING CONSTRUCTED NORMALLY TO BE OPEN, (F) RESISTANCE MEANS HAVING A FIRST TERMINAL COUPLED TO SAID CAPACITOR, (G) THIRD SWITCHING MEANS WHICH IS NORMALLY OPEN AND IS COUPLED TO A SECOND TERMINAL OF SAID RESISTANCE MEANS AND TO SAID FIRST TERMINAL OF SAID INDUCTIVE MEANS, (H) FOURTH SWITCHING MEANS WHICH IS NORMALLY OPEN, SAID FIRST, SECOND, THIRD AND FOURTH SWITCHING MEANS BEING RESPONSIVE TO THE PASSAGE OF CURRENT THROUGH SAID FIRST INDUCTIVE MEANS, (I) A SECOND INDUCTIVE MEANS IN SERIES WITH SAID FOURTH SWITCHING MEANS, SAID SERIES CIRCUIT BEING IN PARALLEL WITH SAID SOURCE, (J) A FIFTH SWITCHING MEANS IS NORMALLY OPEN AND ADAPTED TO BE CLOSED IN RESPONSE TO THE PASSAGE OF CURRENT THROUGH SAID SECOND INDUCTIVE MEANS AND (K) A UTILIZATION CIRCUIT IN SERIES WITH SAID FIFTH SWITCHING MEANS, THE SERIES COMBINATION BEING PARALLEL WITH SAID VOLTAGE SOURCE.