Automatic clutch and brake controlling means in combination with a pattern sewing machine

Claim 1

A SEWING UNIT COMPRISING A SEWING MACHINE AND FABRIC HOLDING AND SHIFTING MEANS, MEANS FOR SEPARATELY OPERATING SAID SEWING MACHINE AND SAID SHIFTING MEANS, AND CONTROL MEANS FOR AUTOMATICALLY OPERATING SAID SEWING MACHINE AND SAID SHIFTING MEANS IN ACCORDANCE WITH THE POSITION OF SAID FABRIC HOLDING MEANS, AND WHEREIN SAID SEWING MACHINE OPERATING MEANS INCLUDES AN ELECTRIC CLUTCH AND AN ELECTRIC BRAKE, AND SAID CONTROL MEANS INCLUDING AN ELECTRICAL CIRCUIT COMPRISING A GENERATOR DRIVEN BY SAID SEWING MACHINE AND COUPLED TO PRODUCE A SPEED VARIABLE VOLTAGE FOR PROVIDING A CLUTCH AND BRAKE CONTROLLING CURRENT AT THE TERMINATION OF A SEWING OPERATION TO SLOW THE OPERATION OF SAID SEWING MACHINE AT THE TERMINATION OF A DESIRED SEWING OPERATION IMMEDIATELY PRIOR TO THE FINAL STOPPAGE OF THE SEWING MACHINE, SAID ELECTRICAL CIRCUIT INCLUDING MEANS PROVIDING A FIXED VOLTAGE IN OPPOSITION TO THE SPEED VARIABLE VOLTAGE OF THE OUTPUT OF SAID GENERATOR, AND SAID CIRCUIT COMPRISING CONTROLLED SWITCHING DEVICES WHICH ARE RESPONSIVE TO THE CURRENT WHICH RESULTS FROM THE COMBINED SAID VOLTAGES TO ENERGIZE SAID CLUTCH OR BRAKE.