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公开(公告)号：US3466392A
公开(公告)日：1969-09-09
申请号：US3466392D
申请日：1966-03-03
Applicant: IBM
Inventor： CALFEE RICHARD W , HOPNER EMIL , MEYER ORMAN F , WEST LYNN P
CPC classification number: H04L27/10 , H03C1/545 , H04B14/006
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公开(公告)号：DE3873969T2
公开(公告)日：1993-03-11
申请号：DE3873969
申请日：1988-04-26
Applicant: IBM
Inventor： BREZOCZKY BLASIUS , HOPNER EMIL
Abstract: A high speed magnetisable disk contact recording and reading system comprising a recording disk (10) including a substrate with a coating (15) thereon of a magnetisable material having a relatively low thermal conductivity, a magnetic recording and reading transducer (17) in physical contact with the recording disk (10), and means (21) to produce relative motion between the magnetisable recording disk and said transducer. According the invention the system is characterised in that the transducer comprises a substrate of a single crystal material having a relatively high thermal conductivity, a relatively low friction coefficient and a high surface energy, whereby an attractive force is exerted between the recording medium said transducer so that the transducer is maintained in contact with the recording medium during said relative motion and high density recorded data can be reliably written on and sensed from the recording medium.
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公开(公告)号：DE1811418A1
公开(公告)日：1969-08-14
申请号：DE1811418
申请日：1968-11-28
Applicant: IBM
Inventor： WARREN CALFEE RICHARD , HOPNER EMIL
Abstract: A color video recording and playback system employs a continuous sinusoidal subharmonic of the color subcarrier signal, which is used to amplitude modulate a frequency modulated video signal during the record mode, and is retrieved during playback for synchronization and phase correction of the color signal.
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公开(公告)号：CA733660A
公开(公告)日：1966-05-03
申请号：CA733660D
Applicant: IBM
Inventor： HOPNER EMIL , FUNK HOWARD L , CRITCHLOW DALE L
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Patent Agency Ranking
公开(公告)号：DE3873969D1
公开(公告)日：1992-10-01
申请号：DE3873969
申请日：1988-04-26
Applicant: IBM
Inventor： BREZOCZKY BLASIUS , HOPNER EMIL
Abstract: A high speed magnetisable disk contact recording and reading system comprising a recording disk (10) including a substrate with a coating (15) thereon of a magnetisable material having a relatively low thermal conductivity, a magnetic recording and reading transducer (17) in physical contact with the recording disk (10), and means (21) to produce relative motion between the magnetisable recording disk and said transducer. According the invention the system is characterised in that the transducer comprises a substrate of a single crystal material having a relatively high thermal conductivity, a relatively low friction coefficient and a high surface energy, whereby an attractive force is exerted between the recording medium said transducer so that the transducer is maintained in contact with the recording medium during said relative motion and high density recorded data can be reliably written on and sensed from the recording medium.
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公开(公告)号：CA1294704C
公开(公告)日：1992-01-21
申请号：CA560859
申请日：1988-03-08
Applicant: IBM
Inventor： BREZOCZKY BLASIUS , HOPNER EMIL
Abstract: HIGH SPEED MAGNETIC DISK CONTACT RECORDING SYSTEM A high speed magnetic disk recording system is described in which the recording medium comprises a substrate having a magnetic coating thereon, and a magnetic recording transducer is operated in physical contact with the recording medium. The magnetic transducer comprises a single crystal material on at least the surface which contacts the recording medium. The single crystal material has a high thermal conductivity, a low friction coefficient and a high surface energy so that, when relative motion is provided between the magnetic recording transducer and the recording medium, an attractive force is generated which maintains the magnetic recording transducer in contact with the recording medium so that high density recorded data can be reliably written and sensed without excessive wear to either the magnetic transducer or the recording medium. SA986025
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公开(公告)号：DE3377969D1
公开(公告)日：1988-10-13
申请号：DE3377969
申请日：1983-06-21
Applicant: IBM
Inventor： FEATHERSTON JOHN RICHARD , HOPNER EMIL , PATTEN MICHAEL ALLEN , WATKINS ROBERT VERNON
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公开(公告)号：DE3669088D1
公开(公告)日：1990-03-29
申请号：DE3669088
申请日：1986-11-04
Applicant: IBM
Abstract: A pulse signal conditioner filters and equalizes signal pulses representing digital data whether or not obtained from a magnetic recording device. Modified low pass filters filter (23, 25) the pulse signals and also derive and feed forward the second time derivative of the filtered pulse signals. The filtered pulse and the second time (234, 254) derivative thereof are combined to (230, 250) slim the pulse. Further slimming is provided by delay line equalizers (27, 29) having three paths. A first path (271) for attenuating the pulse signals, a second path (272) for delaying the pulse signals for a first delay, and a third path (273-274) for delaying the pulse signals for a second delay and attenuation. Pulse signals from the three paths are combined (270) to further slim the pulse.
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公开(公告)号：CA765900A
公开(公告)日：1967-08-22
申请号：CA765900D
Applicant: IBM
Inventor： RUMBLE DALE H , HOPNER EMIL
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