Synthetic rate generator

Claim 1

A SERVOMECHANISM WITH RATE FEEDBACK COMPRISING: TRANSMITTER MEANS FOR PRODUCING AN OUTPUT SIGNAL DEPENDENT UPON THE POSITION OF A MOVABLE ELEMENT THEREOF, RECEIVING MEANS FOR PRODUCING AN OUTPUT SIGNAL DEPENDENT UPON THE POSITION OF A MOVABLE ELEMENT THEREOF, ERROR DETECTING MEANS FOR COMPARING SAID OUTPUT SIGNALS TO PRODUCE AN ERROR SIGNAL REPRESENTING A DIFFERENCE IN THE RELATIVE POSITION OF SAID MOVABLE ELEMENTS, DRIVING MEANS, A POWER SUPPLY, SWITCHING MEANS SELECTIVELY ENERGIZE IN RESPONSE TO SAID ERROR SIGNAL TO APPPLY THE OUTPUT OF SAID POWER SUPPLY TO SELECTIVELY CONDITION SAID DRIVING MEANS FOR ROTATION IN EITHER DIRECTION, A RATE CIRCUIT IN WHICH A RATE SIGNAL IS DEVELOPED CORRESPONDING TO THE BUILD-UP-TO SPEED AND THE COAST-TO-STOP CHARACTERISTIC OF SAID MOVABLE ELEMENTS, SAID RATE CIRCUIT COMPRISING AN ELECTRICAL FILTER WITH TWO TIME CONSTANT, MEANS RESPONSIVE TO THE OPERATION OF SAID SWITCHING MEANS FOR CONNECTING SAID RATE CIRCUIT TO A SOURCE OF POWER AND MEANS TO SUPPLY THE OUTPUT OF SAID RATE CIRCUIT AS A FEEDBACK SIGNAL TO SAID ERROR DETECTING MEANS.