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公开(公告)号：CH647198A5
公开(公告)日：1985-01-15
申请号：CH351779
申请日：1979-04-12
Applicant: IBM
Inventor： CLANCY DOUGLAS EUGENE , JOHNSON CARL FOSTER , MCCRAY WILLIAM ROY , NEAL DANNY MARVIN
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13.发明专利
公开(公告)号：CH644063A5
公开(公告)日：1984-07-13
申请号：CH289979
申请日：1979-03-29
Applicant: IBM
Inventor： BOWLES DAVID JOHN , CLANCY DOUGLAS EUGENE , JOHNSON CARL FOSTER , NEAL DANNY MARVIN
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公开(公告)号：IT8023016D0
公开(公告)日：1980-06-26
申请号：IT2301680
申请日：1980-06-26
Applicant: IBM
Inventor： FRANKENY RICHARD FRANCIS , CLANCY DOUGLAS EUGENE , OLSON GEORGE PETER
Abstract: A damping control system for a three phase stepper motor. A reluctance velocity transducer is used for each of the three phases. The output of each of the transducers is proportional to the rotational velocity of the motor. Each of the transducers is rotationally phase shifted 3.75 with respect to one another and phased to the motor rotor rotationally such that the zero voltage crossings of the transducers correspond to the zero torque crossings of the motor. During damping or detenting of the motor the selected phase has current applied to it which is equal to a predetermined fixed value plus the feedback from its associated transducer. The windings on each side of the detent position have current applied to them which is proportional to the voltage from their respective feedback transducers. The voltage in each of the windings is amplified by a selected gain constant. The current in each of the windings is such that maximum torque is applied to drive the motor to the detent position with appropriate current reversals in the windings to damp out any kinetic energy in the rotor during detenting.
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公开(公告)号：AU4597479A
公开(公告)日：1979-11-29
申请号：AU4597479
申请日：1979-04-12
Applicant: IBM
Inventor： BOWLES DAVID JOHN , CLANCY DOUGLAS EUGENE , JOHNSON CARL FOSTER , NEAL DANNY MARVIN
Abstract: On electronic typewriters which have the ability to record into a small working memory those characters, functions and escapements which are keyed at the keyboard, it is many times advantageous to be able to place the carrier and the print point over a character which has been previously typed without using repeated backspaces. Disclosed herein is a feature for an electronic typewriter which permits the operator to easily align the print point with a character on the page by positioning a reference mark on the card holder or print carrier in relation to a previously printed character and then through keyboard control cause the carriage to shift its position such that the print point is then exactly aligned with the character printed. The positioning of the carrier such that the reference mark is in relation to the desired print point is accomplished by a backspace operation and the repositioning or causing of the carrier to assume a position immediately over the subject character is accomplished by keyboard control through the electronics of the typewriter to cause the carrier to shift a predetermined distance.
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Patent Agency Ranking
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公开(公告)号：NO155520B
公开(公告)日：1986-12-29
申请号：NO802130
申请日：1980-07-15
Applicant: IBM
Inventor： CLANCY DOUGLAS EUGENE , FRANKENY RICHARD FRANCIS , OLSON GEORGE PETER
Abstract: A damping control system for a three phase stepper motor. A reluctance velocity transducer is used for each of the three phases. The output of each of the transducers is proportional to the rotational velocity of the motor. Each of the transducers is rotationally phase shifted 3.75 with respect to one another and phased to the motor rotor rotationally such that the zero voltage crossings of the transducers correspond to the zero torque crossings of the motor. During damping or detenting of the motor the selected phase has current applied to it which is equal to a predetermined fixed value plus the feedback from its associated transducer. The windings on each side of the detent position have current applied to them which is proportional to the voltage from their respective feedback transducers. The voltage in each of the windings is amplified by a selected gain constant. The current in each of the windings is such that maximum torque is applied to drive the motor to the detent position with appropriate current reversals in the windings to damp out any kinetic energy in the rotor during detenting.
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公开(公告)号：IT1148876B
公开(公告)日：1986-12-03
申请号：IT2301680
申请日：1980-06-26
Applicant: IBM
Inventor： CLANCY DOUGLAS EUGENE , FRANKENY RICHARD FRANCIS , OLSON GEORGE PETER
Abstract: A damping control system for a three phase stepper motor. A reluctance velocity transducer is used for each of the three phases. The output of each of the transducers is proportional to the rotational velocity of the motor. Each of the transducers is rotationally phase shifted 3.75 with respect to one another and phased to the motor rotor rotationally such that the zero voltage crossings of the transducers correspond to the zero torque crossings of the motor. During damping or detenting of the motor the selected phase has current applied to it which is equal to a predetermined fixed value plus the feedback from its associated transducer. The windings on each side of the detent position have current applied to them which is proportional to the voltage from their respective feedback transducers. The voltage in each of the windings is amplified by a selected gain constant. The current in each of the windings is such that maximum torque is applied to drive the motor to the detent position with appropriate current reversals in the windings to damp out any kinetic energy in the rotor during detenting.
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公开(公告)号：AU521804B2
公开(公告)日：1982-04-29
申请号：AU4597479
申请日：1979-04-12
Applicant: IBM
Inventor： BOWLES DAVID JOHN , CLANCY DOUGLAS EUGENE , JOHNSON CARL FOSTER , NEAL DANNY MARVIN
Abstract: On electronic typewriters which have the ability to record into a small working memory those characters, functions and escapements which are keyed at the keyboard, it is many times advantageous to be able to place the carrier and the print point over a character which has been previously typed without using repeated backspaces. Disclosed herein is a feature for an electronic typewriter which permits the operator to easily align the print point with a character on the page by positioning a reference mark on the card holder or print carrier in relation to a previously printed character and then through keyboard control cause the carriage to shift its position such that the print point is then exactly aligned with the character printed. The positioning of the carrier such that the reference mark is in relation to the desired print point is accomplished by a backspace operation and the repositioning or causing of the carrier to assume a position immediately over the subject character is accomplished by keyboard control through the electronics of the typewriter to cause the carrier to shift a predetermined distance.
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公开(公告)号：DE2920563A1
公开(公告)日：1979-11-29
申请号：DE2920563
申请日：1979-05-21
Applicant: IBM
Inventor： BOWLES DAVID JOHN , CLANCY DOUGLAS EUGENE , JOHNSON CARL FOSTER , NEAL DANNY MARVIN
Abstract: On electronic typewriters which have the ability to record into a small working memory those characters, functions and escapements which are keyed at the keyboard, it is many times advantageous to be able to place the carrier and the print point over a character which has been previously typed without using repeated backspaces. Disclosed herein is a feature for an electronic typewriter which permits the operator to easily align the print point with a character on the page by positioning a reference mark on the card holder or print carrier in relation to a previously printed character and then through keyboard control cause the carriage to shift its position such that the print point is then exactly aligned with the character printed. The positioning of the carrier such that the reference mark is in relation to the desired print point is accomplished by a backspace operation and the repositioning or causing of the carrier to assume a position immediately over the subject character is accomplished by keyboard control through the electronics of the typewriter to cause the carrier to shift a predetermined distance.
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