Contouring system accelerationdeceleration control

Claim 1

A NUMERICAL CONTROL SYSTEM, COMPRISING, IN COMBINATION; A RECORD CONTAINING NUMERICAL INFORMATION; MEANS FOR ACCEPTING SAID RECORD AND CREATING ELECTRICAL REPRESENTATIONS OF VARIOUS SEGMENTS OF INFORMATION CONTAINED ON SAID RECORD; A SOURCE OF ELECTRICAL PULSES CONTROLLABLE AS TO FREQUENCY; A CONTROLLER OPERATIVE TO RECEIVE PULSES FROM SAID SOURCE AND INFORMATION FROM SAID RECORD AND TO SIMULTANEOUSLY GENERATE FROM SAID RECORD AND TO VARYING FREAUENCIES; AND A CONTROL CIRCUIT CONNECTED TO SAID PULSE GENERTOR HAVING A FIRST, NORMAL STATE WHEREIN IT CAUSES SAID PULSE GENERATOR TO EMIT PULSES OF A CONSTANT FREQUENCY, A SECOND DECELELERATING, STATE WHEREIN IT CAUSES SAID PULSE GENERATOR TO EMIT PULSES OF A ACONTINUOUSLY CREASING FREQUENCY, AND A THIRD, DECELERATING, STATE WHEREIN IT CAUSES SAID PULSE GENERATAOR TO EMIT PULSES OF A CONTINUOUSLY INCREASING FREQUENCY; AND MEANS, RESPONSIVE TO INFORMATION CONTAINED ON SAID RECORD FOR SWITCHING SAID CONTROL CIRCUITRY INTO ITS SECOND OR THIRD STATES FROM ITS NORMAL STATE.