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公开(公告)号：US3900891A
公开(公告)日：1975-08-19
申请号：US42814373
申请日：1973-12-26
Applicant: IBM
Inventor： GRIFFITHS DONALD E , KALTHOFF CLEMENT H , LAENEN EDWARD G
Abstract: A rotating head mandrel is contoured so that in cross-section the mandrel appears similar to the shape of an eyeball. Two mandrels are axially aligned for supporting a tape helically wrapped about the mandrels. Between the two mandrels is a rotor carrying a magnetic head. The magnetic tape helically wraps the two mandrels in the region of the rotor. The path of the rotating head relative to the tape is a transverse track at an acute angle to the longitudinal direction of the tape. The peak of the eyeball contour or cam shape contour of the mandrel is located at the entry and exit points of the tape as it helically wraps the mandrels. The peak gives the tape additional height relative to the rotating head and prevents the head from nicking the edge of the tape as it crosses the edges of the helically wrapped tape. The surfaces of the mandrels have holes through which air may be forced to provide a hydrostatic air bearing between the tape and the mandrels. The pattern of the holes on the mandrels is selected to support the tape in a uniform manner during helical wrap of the tape about the mandrels.
Abstract translation: 旋转头心轴成形，使得在横截面中心轴看起来类似于眼球的形状。 两个心轴轴向对准，用于支撑围绕心轴螺旋缠绕的磁带。 在两个心轴之间是带有磁头的转子。 磁带将两个心轴螺旋地包裹在转子的区域。 旋转头相对于带的路径是与带的纵向成锐角的横向轨迹。 心轴的眼球轮廓或凸轮形状轮廓的峰值位于磁带的入口和出口点处，因为其螺旋地包裹心轴。 峰值相对于旋转头带增加了磁带的高度，并防止磁头在穿过螺旋缠绕的磁带的边缘时刻划带的边缘。 心轴的表面具有孔，通过该孔，可以迫使空气在带和心轴之间提供静压空气轴承。 选择心轴上的孔的图案以在带绕螺心的螺旋卷绕期间以均匀的方式支撑带。
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公开(公告)号：CA1068400A
公开(公告)日：1979-12-18
申请号：CA249501
申请日：1976-04-02
Applicant: IBM
Inventor： GRIFFITHS DONALD E , KOESTNER JOSEPH H , NORTON DAVID G
Abstract: STACKED FLEXIBLE DISK STRUCTURES Semi-rigid washers are coaxially disposed to form an air-permeable spindle for coaxially supporting flexible record disks. A plurality of such washers and disks is coaxially stacked to construct a flexible disk file. Washers preferably have an annular shoulder with a depth slightly different than the thickness of the record disks for firmly supporting and aligning same in the coaxial stack. Alternatively, disks may be adhesively secured to a radial outward portion of each washer. Additionally, each washer has a plurality of radially extending air passageways for facilitating radial air movement which controls the stack of flexible record disks. A radial inward portion of each washer abuts each adjacent washer for forming a firm axial stack of disks. A rigid stabilizing plate at each axial end completes the assembly. The present invention is an improvement over that shown by Penfold et al in commonly assigned, copending Canadian application Serial Number 211,526 filed October 16, 1974, and entitled "Multiple Flexible Disk File".
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公开(公告)号：FR2283505A1
公开(公告)日：1976-03-26
申请号：FR7521479
申请日：1975-07-03
Applicant: IBM
Inventor： GRIFFITHS DONALD E , DODD PAUL D
Abstract: A flexible disk file signal storage apparatus has a multiplicity of relatively thin, flexible disks of varying radii and arranged axially to facilitate radial disk selection. The radii pattern tends to minimize radii differences, thereby enhancing storage capacity. The flexible disks are arranged in axial groups of more than three disks with at least one disk in each group having a minimum radius with a pair of outer disks with a maximum radius plus at least one intermediate diameter disk. By interleaving alternate ones of said minimum radius disks between intermediate and maximum radius disks, radial selection access ports are maximized along an axial direction for a given radial difference between the maximum and minimum disk radii.
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公开(公告)号：CA1096039A
公开(公告)日：1981-02-17
申请号：CA265986
申请日：1976-11-19
Applicant: IBM
Inventor： GRIFFITHS DONALD E , NORTON DAVID G
Abstract: FLUIDIC TRANSDUCER ACCESS OPENING IN A STACK OF FLEXIBLE RECORD DISKS Selectively altering air flow generates an access opening for a record surface on one of a large plurality of flexible record storage disks coaxially supported on a common spindle for rotation. Air flow through the interstices between the disks usually is sufficient to stabilize rotation of the disks. To generate a transducer access opening the air flow on one axial side of a record disk to be accessed, which includes a record surface, is altered in a manner that disks axially adjacent and facing the record surface tend to axially move together at their periphery, resulting in a peripheral transducer access opening adjacent a stabilized record disk. In a preferred form of the invention, the axial extent of the altered air flow is limited to a predetermined portion of the stack of disks for minimizing the volume of air flow change. For dual sided recording, the air flow is altered at either side of the record disk to be accessed.
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Patent Agency Ranking
公开(公告)号：FR2332591A1
公开(公告)日：1977-06-17
申请号：FR7629976
申请日：1976-09-30
Applicant: IBM
Inventor： GRIFFITHS DONALD E , NORTON DAVID G
Abstract: Selectively altering air flow generates an access opening for a record surface on one of a large plurality of flexible record storage disks coaxially supported on a common spindle for rotation. Air flow through the interstices between the disks usually is sufficient to stabilize rotation of the disks. To generate a transducer access opening the air flow on one axial side of a record disk to be accessed, which includes a record surface, is altered in a manner that disks axially adjacent and facing the record surface tend to axially move together at their periphery, resulting in a peripheral transducer access opening adjacent a stabilized record disk. In a preferred form of the invention, the axial extent of the altered air flow is limited to a predetermined portion of the stack of disks for minimizing the volume of air flow change. For dual sided recording, the air flow is altered at either side of the record disk to be accessed.
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公开(公告)号：FR2308163A1
公开(公告)日：1976-11-12
申请号：FR7605922
申请日：1976-02-25
Applicant: IBM
Inventor： GRIFFITHS DONALD E , PUGLIESE CARL F
Abstract: A stack of flexible record disks is peripherally accessed following a peripheral identification procedure. A magnetic sensing means disposed in close proximity to the outer circumference of the stack senses a magnetic record track on the respective disk for identifying axial position such that the record surface of a predetermined disk can be accessed. For example, one of a plurality of frequencies particularly identify a disk within a group of disks. A given storage apparatus may have a plurality of such groups.
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公开(公告)号：CA1038492A
公开(公告)日：1978-09-12
申请号：CA225807
申请日：1975-04-23
Applicant: IBM
Inventor： GRIFFITHS DONALD E , KOESTNER JOSEPH H , NORTON DAVID G
IPC: G11B17/32 , G11B5/02 , G11B5/55 , G11B17/02 , G11B17/22 , G11B17/30 , G11B21/02 , G11B25/04 , G11B5/82 , G11B5/54
Abstract: STACKED FLEXIBLE RECORD DISK STORAGE APPARATUS HAVING ENHANCED DISK SEPARATION USING A PRIMARY BENDING MODE IN A STACK OF DISKS A signal storage apparatus employs a stack of circular record disks accessible by axially separating segments of selected disks in the stack. One disk in a stack of coaxial rotatable circular compliant record disks is accessed with a minimum energy imparted to such disks by a chord roll disk separator. In a preferred form, the chord roll disk separator induces a primary bending mode to some of the disks being axially separated. In another aspect of the disclosure, a signal transducer is mounted integrally with the disk separator. With such mounting, primary, secondary, or higher order bending modes may be successfully employed. Full chordal and partial chordal axial disk separations are described. Arcuate and radially directed separation techniques may be employed. A unique axial stacking arrangement for compliant record disks is also described.
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公开(公告)号：CA1038491A
公开(公告)日：1978-09-12
申请号：CA225806
申请日：1975-04-23
Applicant: IBM
Inventor： GRIFFITHS DONALD E , KOESTNER JOSEPH H , NORTON DAVID G
IPC: G11B17/32 , G11B5/02 , G11B5/55 , G11B17/02 , G11B17/22 , G11B17/30 , G11B21/02 , G11B25/04 , G11B5/82 , G11B5/54
Abstract: STACKED FLEXIBLE RECORD DISK STORAGE APPARATUS HAVING ENHANCED DISK SEPARATION WITH TRANSDUCER MOUNTED IN DISK SEPARATOR A signal storage apparatus employs a stack of circular record disks accessible by axially separating segments of selected disks in the stack. One disk in a stack of coaxial rotatable circular compliant record disks is accessed with a minimum energy imparted to such disks by a chord roll disk separator. In a preferred form, the chord roll disk separator induces a primary bending mode to some of the disks being axially separated. In another aspect of the disclosure, a signal transducer is mounted integrally with the disk separator. With such mounting, primary, secondary, or higher order bending modes may be successfully employed. Full chordal and partial chordal axial disk separations are described. Arcuate and radially directed separation techniques may be employed. A unique axial stacking arrangement for compliant record disks is also described.
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公开(公告)号：FR2275845A1
公开(公告)日：1976-01-16
申请号：FR7515090
申请日：1975-05-06
Applicant: IBM
Inventor： GRIFFITHS DONALD E , KOESTNER JOSEPH H , NORTON DAVID G
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