Electric motor power positioner and servosystem

Claim 1

A SYSTEM FOR RAPIDLY AND ACCURATELY POSITIONING A CONTROLLED UNIT BY A CONTROL UNIT, INCLUDING IN COMBINATION: A CONTROL UNIT MEANS, A CONTROLLED UNIT MEANS, SIGNAL GENERATING MEANS OPERATIVELY CONNECTED WITH SAID CONTROL AND CONTROLLED UNIT MEANS ARRANGED TO GENERATE AN ERROR SIGNAL VARIABLE IN POLARITY AND MAGNITUDE CORRESPONDING TO THE RELATIVE POSITIONING OF THE TWO UNITS WITH RESPECT TO ONE ANOTHER, D.C. AMPLIFYING MEANS CONNECTED IN CIRCUIT WITH SAID SIGNAL GENERATING MEANS, A PERMANENT MAGNET D.C. REVERSIBLE MOTOR OPERATIVELY CONNECTED TO RECEIVE SIGNALS FROM THE AMPLIFYING MEANS AND FURTHER CONNECTED WITH THE CONTROLLED UNIT MEANS FOR MOVING THE LATTER IN RESPONSE TO THE AMPLIFIED ERROR SIGNALS, SAID AMPLIFYING MEANS BEING SO CONSTRUCTED AND ARRANGED AS TO SEPARATE SAID INCOMING ERROR SIGNAL INTO TWO COMPONENT SIGNALS OF THE SAME LEVEL BUT OPPOSITE POLARITY, A PAIR OF RELAYS EACH CONNECTED TO RECEIVE ONE OF THE COMPONENT ERROR SIGNALS FROM SAID AMPLIFYING MEANS AND FURTHER CONNECTED TO TRANSMIT SAID SIGNALS TO ACTUATE SAID D.C. MOTOR IN ACCORDANCE WITH THE POLARITY OF SAID SIGNALS TO THEREBY DETERMINE THE DIRECTION OF ROTATION OF SAID MOTOR, DEGENERATIVE FEEDBACK MEANS ARRANGED TO CONTINUOUSLY IMPRESS A SIGNAL OF POSITIVE POLARITY AND PREDETERMINED MAGNITUDE UPON SAID AMPLIFYING MEANS WHEN THE MOTOR IS RUNNING, SAID ARRANGEMENT BEING SUCH THAT WHEN THE ERROR SIGNAL LEVEL EXCEEDS THE FEEDBACK IMPRESSED SIGNAL LEVEL ONE OF SAID RELAYS WILL BE CAUSED TO MOMENTARILY DISCONTINUE TRANSMITTING SIGNALS TO SAID MOTOR AND TO IMMEDIATELY THEREAFTER COMMENCE SIGNAL TRANSMISSION TO SAID MOTOR, WHEREBY SAID MOTOR RECEIVES A SERIES OF ACTUATING SIGNALS OF EQUAL AMPLITUDE BUT SUCCESSIVELY LESS DURATION, SAID ARRANGEMENT FURTHER BEING SUCH THAT UPON REMOVAL OF SAID ERROR SIGNAL SAID RELAYS OPERATE TO SHORT SAID MOTOR AND THUS DYNAMICALLY BRAKE SAME, WHEREBY SAID MOTOR RECEIVES AN AVERAGE ACTUATING CURRENT OF DECREASING MAGNITUDE AS SAID CONTROLLED UNIT APPROACHES ITS DESIRED POSITION.

Claim 2

A SYSTEM FOR RAPIDLY AND ACCURATELY POSITIONING A CONTROLLED UNIT BY A CONTROL UNIT, INCLUDING IN COMBINATION: A CONTROL UNIT MEANS, A CONTROLLED UNIT MEANS, SIGNAL GENERATING MEANS OPERATIVELY CONNECTED WITH SAID CONTROL AND CONTROLLED UNIT MEANS ARRANGED TO GENERATE AN ERROR SIGNAL VARIABLE IN POLARITY AND MAGNITUDE CORRESPONDING TO THE RELATIVE POSITIONING OF THE TWO UNITS WITH RESPECT TO ONE ANOTHER, D.C. AMPLIFYING MEANS CONNECTED IN CIRCUIT WITH SAID SIGNAL GENERATING MEANS, A PERMANENT MAGNET D.C. REVERSIBLE MOTOR OPERATIVELY CONNECTED TO RECEIVE SIGNALS FROM THE AMPLIFYING MEANS AND FURTHER CONNECTED WITH THE CONTROLLED UNIT MEANS FOR MOVING THE LATTER IN RESPONSE TO THE AMPLIFIED ERROR SIGNALS, SAID AMPLIFYING MEANS BEING SO CONSTRUCTED AND ARRANGED AS TO SEPARATE SAID INCOMING ERROR SIGNAL INTO TWO COMPONENT SIGNALS OF THE SAME LEVEL BUT OPPOSITE POLARITY, A PAIR OF RELAYS EACH CONNECTED TO RECEIVE ONE OF THE COMPONENT ERROR SIGNALS FROM SAID AMPLIFYING MEANS AND FURTHER CONNECTED TO TRANSMIT SAID SIGNALS TO ACTUATE SAID D.C. MOTOR IN ACCORDANCE WITH THE POLARITY OF SAID SIGNALS TO THEREBY DETERMINE THE DIRECTION OF ROTATION OF SAID MOTOR, DEGENERATIVE FEEDBACK MEANS ARRANGED TO CONTINUOUSLY IMPRESS A SIGNAL OF POSITIVE POLARITY AND PREDETERMINED MAGNITUDE UPON SAID AMPLIFYING MEANS WHEN THE MOTOR IS RUNNING, SAID ARRANGEMENT BEING SUCH THAT WHEN THE ERROR SIGNAL LEVEL EXCEEDS THE FEEDBACK IMPRESSED SIGNAL LEVEL ONE OF SAID RELAYS WILL BE CAUSED TO MOMENTARILY DISCONTINUE TRANSMITTING SIGNALS TO SAID MOTOR AND TO IMMEDIATELY THEREAFTER COMMENCE SIGNAL TRANSMISSION TO SAID MOTOR, WHEREBY SAID MOTOR RECEIVES A SERIES OF ACTUATING SIGNALS OF EQUAL AMPLITUDE BUT SUCCESSIVELY LESS DURATION, SAID ARRANGEMENT FURTHER BEING SUCH THAT UPON REMOVAL OF SAID ERROR SIGNAL SAID RELAYS OPERATE TO SHORT SAID MOTOR AND THUS DYNAMICALLY BRAKE SAME, WHEREBY SAID MOTOR RECEIVES AN AVERAGE ACTUATING CURRENT OF DECREASING MAGNITUDE AS SAID CONTROLLED UNIT APPROACHES ITS DESIRED POSITION.