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公开(公告)号：JPS5910913B2
公开(公告)日：1984-03-12
申请号：JP8158079
申请日：1979-06-29
Applicant: Ibm
Inventor： MATLA ARNO , MATTHAEI HORST D
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公开(公告)号：JPS5515892A
公开(公告)日：1980-02-04
申请号：JP8158079
申请日：1979-06-29
Applicant: IBM
Inventor： MATLA ARNO , MATTHAEI HORST D
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公开(公告)号：CA1066410A
公开(公告)日：1979-11-13
申请号：CA268486
申请日：1976-12-22
Applicant: IBM
Inventor： LOUIS HELMUT , MATLA ARNO , SCHALLER KARL H , ZIMMERMANN VOLKER
Abstract: POSITIONING DEVICE FOR THE ACCESS ARM OF THE MAGNETIC HEAD OF A MAGNETIC DISK STORAGE The surface of a magnetic disk (23) is divided into servo sectors (S1) and data sectors (S2). A selectively positionable magnetic head (24) effects, in predetermined time intervals controlled by clock signals of a clock sensor (26), the transfer of servo and data signals. The servo signals sensed in the servo sectors are used for the track following control of the magnetic head. The servo markings (Ma) recorded in the servo sectors (S1) are arranged, with twice the width (2d) of the data tracks in radial distances of one respective track width (d), one beside the other in a row along a disk radius. In each servo sector at least three rows (A, B, C) of servo markings (Ma) are provided. The servo markings are arranged in track direction one behind the other in such a manner that between each of the rows (A, B, C) a distance (g) is formed, and that each servo marking of one row overlaps a servo marking of the following row by one track width (d).
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公开(公告)号：IT7923561D0
公开(公告)日：1979-06-14
申请号：IT2356179
申请日：1979-06-14
Applicant: IBM
Inventor： MATLA ARNO , MATTHAEI HORST D
Abstract: A daisy wheel spring disc utilized in conjunction with a daisy wheel print element to control impression. Both the spring disc and the print element have radially extending petals. The print element petals carry a character adjacent their outer extremity. A spring disc petal is associated with each print element petal for which impression is to be controlled. The spring disc petals vary in length relative to the print element petals. The lengths of the spring disc petals depend upon whether the character on the associated print wheel petal has a large or small print surface area. During printing, the spring disc is positioned on the printing side of the print element. When a print element petal is driven out of the plane of the remaining print element petals during printing of a character, the associated spring disc petal will be contacted and will absorb a portion of the energy imparted to the print element petal.
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公开(公告)号：IT1166884B
公开(公告)日：1987-05-06
申请号：IT2356179
申请日：1979-06-14
Applicant: IBM
Inventor： MATLA ARNO , MATTHAEI HORST D
Abstract: A daisy wheel spring disc utilized in conjunction with a daisy wheel print element to control impression. Both the spring disc and the print element have radially extending petals. The print element petals carry a character adjacent their outer extremity. A spring disc petal is associated with each print element petal for which impression is to be controlled. The spring disc petals vary in length relative to the print element petals. The lengths of the spring disc petals depend upon whether the character on the associated print wheel petal has a large or small print surface area. During printing, the spring disc is positioned on the printing side of the print element. When a print element petal is driven out of the plane of the remaining print element petals during printing of a character, the associated spring disc petal will be contacted and will absorb a portion of the energy imparted to the print element petal.
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Patent Agency Ranking
公开(公告)号：DE2961544D1
公开(公告)日：1982-02-04
申请号：DE2961544
申请日：1979-06-28
Applicant: IBM
Inventor： MATLA ARNO , MATTHAEI HORST
Abstract: A daisy wheel spring disc utilized in conjunction with a daisy wheel print element to control impression. Both the spring disc and the print element have radially extending petals. The print element petals carry a character adjacent their outer extremity. A spring disc petal is associated with each print element petal for which impression is to be controlled. The spring disc petals vary in length relative to the print element petals. The lengths of the spring disc petals depend upon whether the character on the associated print wheel petal has a large or small print surface area. During printing, the spring disc is positioned on the printing side of the print element. When a print element petal is driven out of the plane of the remaining print element petals during printing of a character, the associated spring disc petal will be contacted and will absorb a portion of the energy imparted to the print element petal.
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公开(公告)号：CA1110359A
公开(公告)日：1981-10-06
申请号：CA314763
申请日：1978-10-30
Applicant: IBM
Inventor： MATLA ARNO , ZIMMERMAN VOLKER
Abstract: Digital position error signals from a position detector and a track increment generator are summed and applied to a compensator which is responsive to these signals during the sampling of servo sectors on the tracks of a magnetic disk of a magnetic disk store to regulate the position of a magnetic head for track selection and track following. Track selection is effected with an acceleration phase, a constant velocity phase, and a deceleration phase, and overshooting of the magnetic head at the ends of the acceleration and deceleration phases is avoided by digital modification signals read out, from read-only memories in the track increment generator, to the compensator. The digital position error signal from the track increment generator can be combined with the output of a track crossing detector.
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公开(公告)号：DE3160989D1
公开(公告)日：1983-11-03
申请号：DE3160989
申请日：1981-02-16
Applicant: IBM
Inventor： MATLA ARNO , ZIMMERMANN VOLKER
Abstract: For the servo track control of magnetic heads over magnetic tracks, in addition to the main servo position signals arranged in offset fashion to the middle of the track, auxiliary servo position signals are provided symmetrically on each side of the middle of the track. These auxiliary servo position signals are offset along the track length relative to each other and are smaller than half the track width. In the determination of the position error signal, they serve to indicate the tilting of the magnetic head relative to the recording track in that they are unequal. If the magnetic head deviates greatly from the middle of the track, these auxiliary servo position signals can be added to the main servo position signals to obtain a stronger position error signal. For determining and compensating uniform disturbance variables, the momentary values of a control signal are measured and a mean value is formed thereof which, at predetermined intervals, is added to a preceding mean value, stored, and entered as an additional control signal to the control path.
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公开(公告)号：CA1118699A
公开(公告)日：1982-02-23
申请号：CA327404
申请日：1979-05-10
Applicant: IBM
Inventor： MATLA ARNO , MATTHAEI HORST D
Abstract: In a typewheel printer, a radial spring disk is provided which has the same pitch as the type wheel and which is subdivided into fingers. One spring disk finger is associated with each type wheel finger. The spring disk fingers are of different length, depending upon whether the character on the associated type wheel finger has a great or small character line length. GE9-78-018
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公开(公告)号：DE2832338A1
公开(公告)日：1980-01-31
申请号：DE2832338
申请日：1978-07-22
Applicant: IBM DEUTSCHLAND
Inventor： MATLA ARNO , MATTHAEI HORST D
Abstract: A daisy wheel spring disc utilized in conjunction with a daisy wheel print element to control impression. Both the spring disc and the print element have radially extending petals. The print element petals carry a character adjacent their outer extremity. A spring disc petal is associated with each print element petal for which impression is to be controlled. The spring disc petals vary in length relative to the print element petals. The lengths of the spring disc petals depend upon whether the character on the associated print wheel petal has a large or small print surface area. During printing, the spring disc is positioned on the printing side of the print element. When a print element petal is driven out of the plane of the remaining print element petals during printing of a character, the associated spring disc petal will be contacted and will absorb a portion of the energy imparted to the print element petal.
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