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1. 发明专利

DE3865104D1 未知
公开(公告)号：DE3865104D1
公开(公告)日：1991-10-31
申请号：DE3865104
申请日：1988-05-20
申请人： BULL SA
发明人： MAURY CHRISTIAN
IPC分类号： G11B11/10 , G11B5/596 , G11B11/105 , G11B20/12 , G11B21/10

2. 发明专利

DE3769117D1 未知
公开(公告)号：DE3769117D1
公开(公告)日：1991-05-08
申请号：DE3769117
申请日：1987-12-14
申请人： BULL SA
发明人： MAURY CHRISTIAN , PHAM DAN , RICHARD JEAN-MARIE
IPC分类号： G11B11/10 , G11B5/60 , G11B11/105 , G11B13/04
摘要： Magnetic write and optical read head for a carrier of magnetic data comprising at least one optical device (SOI1, SOI2) for focusing a light beam onto the carrier, and a magnetic write transducer (TMI1, TMI2) arranged on the same runner (PI1, PI2) of the head as the optical device. … The head is characterised in that the optical device and the transducer are arranged in the immediate vicinity of one another, at a distance d less than the ratio between, on the one hand, the difference between the track width Lp and the diameter D of the light beam produced by the device (SOI1, SOI2) and, on the other hand, twice the sine of the maximum angle of azimuth phi M. … Applicable to magneto-optic disk memories. … …

3. 发明专利

DE3568656D1 METHOD FOR DISPLACING A MOBILE SYSTEM MOVED BY AN ELECTRIC MOTOR ALONG A GIVEN TRAJECTORY, AND APPARATUS FOR CARRYING OUT SAID METHOD 未知
公开(公告)号：DE3568656D1
公开(公告)日：1989-04-13
申请号：DE3568656
申请日：1985-11-27
申请人： BULL SA
发明人： CARTEAU DANIEL , COUETTE JEAN-JACQUES , MAURY CHRISTIAN , PHAM DAN
IPC分类号： H02P29/00 , G05D3/12 , G11B5/54 , G11B5/55 , G11B21/02 , G05B19/415
摘要： A DC motor drives a magnetic disk memory transducer head between a position proximate the disk periphery to an area on the disk where data are located during which time the head is lowered from an idle to a hovering position. During this time the motor is supplied with a current impulse having a predetermined polarity, amplitude and duration. The polarity of the current impulse is opposite to that of current applied to the motor while the head is being driven between a position beyond the disk periphery to the position proximate the disk periphery. The duration and amplitude of the current impulse are such that the motor angular velocity has a zero value at the completion of the current pulse. Thereafter, a ramping voltage having an average linear waveform is applied to the motor to prevent overshoot of the motor speed and prevent oscillation of the head relative to a face of the disk. The linear ramp current decreases to a zero value, at which time the motor has a constant, non-zero angular velocity.

4. 发明专利

FR2615995A1 未知
公开(公告)号：FR2615995A1
公开(公告)日：1988-12-02
申请号：FR8707514
申请日：1987-05-27
申请人： BULL SA
发明人： MAURY CHRISTIAN
IPC分类号： G11B11/10 , G11B5/596 , G11B11/105 , G11B20/12 , G11B21/10 , G11B5/09 , G11B7/08

5. 发明专利

FR2573904A1 未知
公开(公告)号：FR2573904A1
公开(公告)日：1986-05-30
申请号：FR8418157
申请日：1984-11-29
申请人： BULL SA
发明人： CARTEAU DANIEL , COUETTE JEAN-JACQUES , MAURY CHRISTIAN , PHAM DAN
IPC分类号： H02P29/00 , G05D3/12 , G08B1/08 , G11B5/54 , G11B5/55
摘要： A magnetic disk memory is moved between a first position beyond the disk periphery to a second position proximate the disk periphery while the head is at an idle height above the disk face. The head is moved between the disk periphery and a third position at the edge of an area on the disk where data are located while the head is lowered and raised between the idle height and a hovering height above a face of the disk. An assembly carrying the head includes a radially extending arm, turned by a rotary DC motor. A continuous step excitation waveform is supplied to the motor as the head is driven between the first and second positions until the head arrives at one of the two positions. Each of the steps has a constant amplitude that differs from the immediately preceding step by a predetermined incremental value. All of the steps, except the last step, has the same predetermined duration. The last step has a time duration no greater than that of the previous steps and determined by when the head arrives at the one position. To drive the head between the second and third positions a damping impulse having a predetermined constant amplitude and duration is applied to the motor to cause the motor to stop. The motor is stopped without overshoot and driven to a predetermined speed by then applying a decreasing ramp excitation waveform to it.

6. 发明专利

DE3574066D1 METHOD FOR DISPLACING A MOBILE SYSTEM MOVED BY AN ELECTRIC MOTOR ALONG A GIVEN TRAJECTORY 未知
公开(公告)号：DE3574066D1
公开(公告)日：1989-12-07
申请号：DE3574066
申请日：1985-11-27
申请人： BULL SA
发明人： CARTEAU DANIEL , COUETTE JEAN-JACQUES , MAURY CHRISTIAN , PHAM DAN
IPC分类号： H02P29/00 , G05D3/12 , G08B1/08 , G11B5/54 , G11B5/55 , G05B19/415
摘要： A magnetic disk memory is moved between a first position beyond the disk periphery to a second position proximate the disk periphery while the head is at an idle height above the disk face. The head is moved between the disk periphery and a third position at the edge of an area on the disk where data are located while the head is lowered and raised between the idle height and a hovering height above a face of the disk. An assembly carrying the head includes a radially extending arm, turned by a rotary DC motor. A continuous step excitation waveform is supplied to the motor as the head is driven between the first and second positions until the head arrives at one of the two positions. Each of the steps has a constant amplitude that differs from the immediately preceding step by a predetermined incremental value. All of the steps, except the last step, has the same predetermined duration. The last step has a time duration no greater than that of the previous steps and determined by when the head arrives at the one position. To drive the head between the second and third positions a damping impulse having a predetermined constant amplitude and duration is applied to the motor to cause the motor to stop. The motor is stopped without overshoot and driven to a predetermined speed by then applying a decreasing ramp excitation waveform to it.

7. 发明专利

FR2573904B1 未知
公开(公告)号：FR2573904B1
公开(公告)日：1987-01-02
申请号：FR8418157
申请日：1984-11-29
申请人： BULL SA
发明人： CARTEAU DANIEL , COUETTE JEAN-JACQUES , MAURY CHRISTIAN , PHAM DAN
IPC分类号： H02P29/00 , G05D3/12 , G08B1/08 , G11B5/54 , G11B5/55
摘要： A magnetic disk memory is moved between a first position beyond the disk periphery to a second position proximate the disk periphery while the head is at an idle height above the disk face. The head is moved between the disk periphery and a third position at the edge of an area on the disk where data are located while the head is lowered and raised between the idle height and a hovering height above a face of the disk. An assembly carrying the head includes a radially extending arm, turned by a rotary DC motor. A continuous step excitation waveform is supplied to the motor as the head is driven between the first and second positions until the head arrives at one of the two positions. Each of the steps has a constant amplitude that differs from the immediately preceding step by a predetermined incremental value. All of the steps, except the last step, has the same predetermined duration. The last step has a time duration no greater than that of the previous steps and determined by when the head arrives at the one position. To drive the head between the second and third positions a damping impulse having a predetermined constant amplitude and duration is applied to the motor to cause the motor to stop. The motor is stopped without overshoot and driven to a predetermined speed by then applying a decreasing ramp excitation waveform to it.

8. 发明专利

FR2573903B1 未知
公开(公告)号：FR2573903B1
公开(公告)日：1987-01-02
申请号：FR8418156
申请日：1984-11-29
申请人： BULL SA
发明人： CARTEAU DANIEL , COUETTE JEAN-JACQUES , MAURY CHRISTIAN , PHAM DAN
IPC分类号： H02P29/00 , G05D3/12 , G11B5/54 , G11B5/55 , G11B21/02
摘要： A DC motor drives a magnetic disk memory transducer head between a position proximate the disk periphery to an area on the disk where data are located during which time the head is lowered from an idle to a hovering position. During this time the motor is supplied with a current impulse having a predetermined polarity, amplitude and duration. The polarity of the current impulse is opposite to that of current applied to the motor while the head is being driven between a position beyond the disk periphery to the position proximate the disk periphery. The duration and amplitude of the current impulse are such that the motor angular velocity has a zero value at the completion of the current pulse. Thereafter, a ramping voltage having an average linear waveform is applied to the motor to prevent overshoot of the motor speed and prevent oscillation of the head relative to a face of the disk. The linear ramp current decreases to a zero value, at which time the motor has a constant, non-zero angular velocity.

9. 发明专利

FR2573903A1 未知
公开(公告)号：FR2573903A1
公开(公告)日：1986-05-30
申请号：FR8418156
申请日：1984-11-29
申请人： BULL SA
发明人： CARTEAU DANIEL , COUETTE JEAN-JACQUES , MAURY CHRISTIAN , PHAM DAN
IPC分类号： H02P29/00 , G05D3/12 , G11B5/54 , G11B5/55 , G11B21/02
摘要： A DC motor drives a magnetic disk memory transducer head between a position proximate the disk periphery to an area on the disk where data are located during which time the head is lowered from an idle to a hovering position. During this time the motor is supplied with a current impulse having a predetermined polarity, amplitude and duration. The polarity of the current impulse is opposite to that of current applied to the motor while the head is being driven between a position beyond the disk periphery to the position proximate the disk periphery. The duration and amplitude of the current impulse are such that the motor angular velocity has a zero value at the completion of the current pulse. Thereafter, a ramping voltage having an average linear waveform is applied to the motor to prevent overshoot of the motor speed and prevent oscillation of the head relative to a face of the disk. The linear ramp current decreases to a zero value, at which time the motor has a constant, non-zero angular velocity.

10. 发明专利

FR2609201B1 未知
公开(公告)号：FR2609201B1
公开(公告)日：1989-10-27
申请号：FR8618321
申请日：1986-12-30
申请人： BULL SA
发明人： MAURY CHRISTIAN , PHAM DAN , RICHARD JEAN MARIE
IPC分类号： G11B11/10 , G11B5/60 , G11B11/105 , G11B13/04
摘要： Magnetic write and optical read head for a carrier of magnetic data comprising at least one optical device (SOI1, SOI2) for focusing a light beam onto the carrier, and a magnetic write transducer (TMI1, TMI2) arranged on the same runner (PI1, PI2) of the head as the optical device. … The head is characterised in that the optical device and the transducer are arranged in the immediate vicinity of one another, at a distance d less than the ratio between, on the one hand, the difference between the track width Lp and the diameter D of the light beam produced by the device (SOI1, SOI2) and, on the other hand, twice the sine of the maximum angle of azimuth phi M. … Applicable to magneto-optic disk memories. … …

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