Electric current-sensing time limit motor acceleration system

Claim 1

A COMBINED TIME LIMIT AND CURRENT RESPONSIVE ACCELLERATION CONTROL SYSTEM FOR A DIRECT CURRENT MOTOR, SAID SYSTEM COMPRISING A DIRECT CURRENT MOTOR HAVING AN ARMATURE WINDING, A RESISTIVE SHUNT, MEANS FOR CONNECTING THE ARMATURE WINDING AND THE SHUNT IN SERIES WITH EACH OTHER ACROSS A SOURCE OF UNIDIRECTIONAL VOLTAGE, A SATURABLE TRANSFORMER HAVING A PRIMARY WINDING, A SECONDARDY WINDING AND A SATURABLE CORE, VOLTAGE-RESPONSIVE SWITCHING MEANS CONNECTED TO THE SECONDARY WINDING AND RESPONSIVE TO THE VOLTAGE AT SAID SECONDARY WINDING TO CHANGE FROM A FIRST OPERATIVE CONDITION TO A SECOND OPERATIVE CONDITION THEREBY TO CONTROL THE VOLTAGE APPLIED TO SAID ARMATURE WINDING FROM SAID SOURCE, SAID PRIMARY WINDING BEING CONNECTED IN PARALLEL WITH SAID SHUNT THEREBY TO BE SUPPLIED WITH A VOLTAGE SIGNAL WHICH IS DIRECTLY RELATED TO THE ARMATURE CURRENT OF THE MOTOR AND WHICH APPEARS ACROSS SAID SHUNT, SAID VOLTAGE SIGNAL DECREASING, WHEN THE MOTOR ACCELERATES WITHIN A TIME LESS THAN A PREDETERMINED TIME REQUIRDED TO SATURATED THE CORE, FROM A FIRST VALUE SUFFICIENT FOR CAUSING THE SWITCHING MEANS TO ASSUME SAID FIRST CONDITION TO A SECOND VALUE CAUSING THE SWITCHING MEANS TO ASUMME SAID SECOND CONDITION, THE FLUX RESETTING MEANS FOR ESTABLISHING A FLUX VALUE IN SAID CORE, PRIOR TO APPLICATION OF SAID VOLTAGE SIGNAL, SUCH THAT SAID VOLTAGE SIGNAL CAUSES SATURATION OF SAID CORE RESULTING IN SAID SWITCHING MEANS ASSUMING SAID SECOND CONDITION IF THE MOTOR DOES NOT ACCELERATE SUFFICIENTLY TO CAUSE THE VOLTAGE SIGNAL TO DECREASE TO SAID SECOND VALUE IN LESS THAN SAID PREDETERMINED TIME.