Patents by Inventor Mitsugu Yoshihiro

Mitsugu Yoshihiro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10048093
    Abstract: A magnetism detecting element detects a leakage magnetism from a scale, on which a magnetic signal with a constant period is recorded, and a relative position between the scale and the magnetism detecting element is detected. The magnetism detecting elements are arranged, along a detection direction of the magnetic signal relative to the scale, in a pattern with a pitch of ½n (n is a prime number of 3 or more) of a wavelength ?? of a signal output by the element. Furthermore, as the pattern for cancelling m odd-order harmonics, the m-th power of 2 magnetism detecting elements are arranged within a range in which a pitch distance L of the magnetism detecting element farthest in the detection direction is expressed by L=(??/2)×(?+?+ 1/7+ . . . 1/(2m+1)).
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: August 14, 2018
    Assignee: DMG MORI SEIKI CO., LTD.
    Inventors: Masaaki Kusumi, Yusuke Takei, Shigeru Ishimoto, Mitsugu Yoshihiro
  • Patent number: 10024691
    Abstract: A magnetism detecting element detects a leakage magnetism from a scale, on which a magnetic signal with a constant period is recorded, and a relative position between the scale and the magnetism detecting element is detected. The magnetism detecting elements are arranged, along a detection direction of the magnetic signal relative to the scale, in a pattern with a pitch of ½n (n is a prime number of 3 or more) of a wavelength ?? of a signal output by the element. Furthermore, as the pattern for cancelling m odd-order harmonics, the m-th power of 2 magnetism detecting elements are arranged within a range in which a pitch distance L of the magnetism detecting element farthest in the detection direction is expressed by L=(??/2)×(?+?+ 1/7+ . . . 1/(2m+1)).
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: July 17, 2018
    Assignee: DMG MORI SEIKI CO., LTD.
    Inventors: Masaaki Kusumi, Yusuke Takei, Shigeru Ishimoto, Mitsugu Yoshihiro
  • Publication number: 20170307409
    Abstract: A magnetism detecting element detects a leakage magnetism from a scale, on which a magnetic signal with a constant period is recorded, and a relative position between the scale and the magnetism detecting element is detected. The magnetism detecting elements are arranged, along a detection direction of the magnetic signal relative to the scale, in a pattern with a pitch of 1/2n (n is a prime number of 3 or more) of a wavelength ?? of a signal output by the element. Furthermore, as the pattern for cancelling m odd-order harmonics, the m-th power of 2 magnetism detecting elements are arranged within a range in which a pitch distance L of the magnetism detecting element farthest in the detection direction is expressed by L=(??/2)×(1/3+1/5+1/7+ . . . 1/(2m+1)).
    Type: Application
    Filed: May 19, 2017
    Publication date: October 26, 2017
    Applicant: DMG MORI SEIKI CO., LTD.
    Inventors: Masaaki KUSUMI, Yusuke TAKEI, Shigeru ISHIMOTO, Mitsugu YOSHIHIRO
  • Publication number: 20170284830
    Abstract: A magnetism detecting element detects a leakage magnetism from a scale, on which a magnetic signal with a constant period is recorded, and a relative position between the scale and the magnetism detecting element is detected. The magnetism detecting elements are arranged, along a detection direction of the magnetic signal relative to the scale, in a pattern with a pitch of ½n (n is a prime number of 3 or more) of a wavelength ?? of a signal output by the element. Furthermore, as the pattern for cancelling m odd-order harmonics, the m-th power of 2 magnetism detecting elements are arranged within a range in which a pitch distance L of the magnetism detecting element farthest in the detection direction is expressed by L=(??/2)×(?+?+ 1/7+ . . . 1/(2m+1)).
    Type: Application
    Filed: May 19, 2017
    Publication date: October 5, 2017
    Applicant: DMG MORI SEIKI CO., LTD.
    Inventors: Masaaki KUSUMI, Yusuke TAKEI, Shigeru ISHIMOTO, Mitsugu YOSHIHIRO
  • Patent number: 9733317
    Abstract: A magnetism detecting element detects a leakage magnetism from a scale, on which a magnetic signal with a constant period is recorded, and a relative position between the scale and the magnetism detecting element is detected. The magnetism detecting elements are arranged, along a detection direction of the magnetic signal relative to the scale, in a pattern with a pitch of 1/2n (n is a prime number of 3 or more) of a wavelength ?? of a signal output by the element. Furthermore, as the pattern for cancelling m odd-order harmonics, the m-th power of 2 magnetism detecting elements are arranged within a range in which a pitch distance L of the magnetism detecting element farthest in the detection direction is expressed by L=(??/2)×(1/3+1/5+1/7+ . . . 1/(2m+1)).
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: August 15, 2017
    Assignee: DMG MORI SEIKI CO., LTD.
    Inventors: Masaaki Kusumi, Yusuke Takei, Shigeru Ishimoto, Mitsugu Yoshihiro
  • Publication number: 20150253162
    Abstract: A magnetism detecting element detects a leakage magnetism from a scale, on which a magnetic signal with a constant period is recorded, and a relative position between the scale and the magnetism detecting element is detected. The magnetism detecting elements are arranged, along a detection direction of the magnetic signal relative to the scale, in a pattern with a pitch of 1/2n (n is a prime number of 3 or more) of a wavelength ?? of a signal output by the element. Furthermore, as the pattern for cancelling m odd-order harmonics, the m-th power of 2 magnetism detecting elements are arranged within a range in which a pitch distance L of the magnetism detecting element farthest in the detection direction is expressed by L=(??/2)×(1/3+1/5+1/7+ . . . 1/(2m+1)).
    Type: Application
    Filed: March 6, 2015
    Publication date: September 10, 2015
    Inventors: Masaaki KUSUMI, Yusuke TAKEI, Shigeru ISHIMOTO, Mitsugu YOSHIHIRO
  • Patent number: 7092192
    Abstract: The object of the present invention is to reduce the load and specification requirements on the network and the video server. The buffer usage rate is counted and supplied to the tape driving controller 7. In the reproduction mode, the tape driving controller 7 decreases the running speed of a video tape when the buffer usage rate is larger than the proper value. And when the buffer usage rate is smaller than the proper value, the tape driving controller 7 increases the running speed of the video tape. Moreover, in the recording mode, the tape driving controller 7 stops the tape motion temporarily if the transmission speed of the network is slow and the buffer usage rate declines lower than the proper value. And if the buffer usage rate increases over the proper value, the tape driving controller 7 resumes the tape driving to record signals. Thus, the reproduction speed or the recording speed by the tape driving device 3 can be coincided with the transmission speed of the network.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: August 15, 2006
    Assignee: Sony Corporation
    Inventor: Mitsugu Yoshihiro
  • Publication number: 20020010833
    Abstract: A hard disc device for recording and/or reproducing picture signals in which continuous information signals such as picture signals can be recorded or reproduced by a structure simplified on a whole. The recording and/or reproducing of information signals is re-tried within a range of a preset limit time. The capacities of buffer memories 11a, 1e are set so as to store the information signals corresponding to this limit time.
    Type: Application
    Filed: November 30, 1998
    Publication date: January 24, 2002
    Inventor: MITSUGU YOSHIHIRO
  • Patent number: 6011898
    Abstract: The present invention has as its object to reduce the time and and effort in the work of finding a portion necessary for editing work from a video signal recorded on a video tape. A VTR apparatus (12) reproduces a video signal and sampling data showing the start and end of the shot from a video tape (120). A VP circuit (22) reduces the size of the video signal. A detection circuit (24) detects the boundaries of scenes or important portions based on the reproduced sampling data. The sampling memory (30) samples and records the video signal reduced by the VP circuit (22) at a timing of detection of the boundaries of the scene or important portions by the detection apparatus (24). A display device (34) displays the video signal stored in the sampling memory (30) in a predetermined array along with a time code etc.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: January 4, 2000
    Assignee: Sony Corporation
    Inventors: Kenichi Iwasaki, Mitsugu Yoshihiro, Hirofumi Murakami, Noboru Yanagita
  • Patent number: 5461519
    Abstract: A digital tape recording and reproducing apparatus includes a rotary drum, a magnetic tape helically wrapped around the rotary drum, a mechanism for advancing the magnetic tape relative to the rotary drum, and a recording/reproducing magnetic head mounted on the drum which scans the magnetic tape for recording or reproducing digital signals. The digital signals are recorded in, or reproduced from, successive inclined tracks formed on the tape as the tape is advanced. During recording of the signals, a timing signal is generated at a predetermined interval of time after detection of a reference signal that represents a phase of rotation of the drum, and then the timing signal is recorded in at least one of the inclined tracks, interspersed with the digital signals recorded in the track. During reproduction of signals from the tape, the drum phase reference signal is detected and the timing signal is reproduced and detected, and the time interval between detection of the two signals is measured.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: October 24, 1995
    Assignee: Sony Corporation
    Inventors: Mitsugu Yoshihiro, Yasuo Iwasaki
  • Patent number: 5430583
    Abstract: A magnetic recording and reproducing apparatus, e.g., a video tape recorder for recording and reproducing digital video signals etc., is intended to reliably perform a tracking control even when recording tracks are formed with high density. A first pilot signal having a large azimuth loss and a second pilot signal without azimuth loss are recorded in a recording track, and a rough tracking control operation and a fine tracking control operation are executed on the basis of the second pilot signal and the first pilot signal respectively.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: July 4, 1995
    Assignee: Sony Corporation
    Inventors: Mitsugu Yoshihiro, Kazuyuki Sugizaki, Mikio Kita, Osamu Shimizu
  • Patent number: 5161209
    Abstract: A drum servo circuit (310) is controlled by one (301) of a pair of microprocessors, and a reel servo circuit (220) and a capstan servo circuit (240) are controlled by the other microprocessor (201). Accordingly, the burden on each microprocessor is relatively light, and interrupt processing is performed with predetermined timing to improve servo performance. Further, tape movement can be controlled smoothly and quickly.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: November 3, 1992
    Assignee: Sony Corporation
    Inventors: Yasuo Nagai, Mitsugu Yoshihiro
  • Patent number: 4868923
    Abstract: In a tape loading apparatus having a loading ring with guides for withdrawing a magnetic tape from a tape cassette and wrapping it around a rotary drum, the rotating speed of the loading ring is controlled in accordance with the loading position, that is, the rotation angle of the loading ring, to protect the magnetic tape from being damaged during a loading operation, and a torque for resisting unwinding of the tape from a reel in the cassette during the loading operation is varied in accordance with the amount of tape wound thereon.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: September 19, 1989
    Assignee: Sony Corporation
    Inventor: Mitsugu Yoshihiro
  • Patent number: 4791498
    Abstract: A time base corrector for correcting time base fluctuations in a video signal is effective to remove both low frequency time base fluctuations and repetitive high frequency time base fluctuations repeating at the field period of the video signal. The time base corrector includes a memory having a plurality of addresses for storing residual phase error data corresponding to iundividual horizontal lines of each field period. A control circuit supplies corresponding residual phase error data from the memory to be used in compensating a present phase error signal whereby the high frequency time base fluctuations may be removed, and further mixes the present phase error signal with corresponding residual phase error data to generate new residual phase error data for storage in the memory in place of the original residual phase error data.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: December 13, 1988
    Assignee: Sony Corporation
    Inventor: Mitsugu Yoshihiro
  • Patent number: 4758912
    Abstract: In a magnetic tape cassette recording and/or reproducing device having a tape loading apparatus for withdrawing tape from an operatively positioned cassette and wrapping the withdrawn tape about a guide drum having a rotary head for recording or reproducing signals on the tape; supply and take-up reel motors apply torques to resist unwinding of the tape from supply and take-up reels in the operatively positioned cassette, a servo-control maintains the supply reel in a stopped condition during a loading operation, the ratio of currents supplied to the supply and take-up reel motors, respectively, for achieving the stopped condition of the supply reel and for applying a constant torque to the take-up reel is determined and the radius of the tape wound on one of the reels is calculated from such ratio, whereupon, a value of the torque that has to be applied to that one reel for maintaining a predetermined tension in the tape during the loading operation is calculated in accordance with the calculated radius of t
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: July 19, 1988
    Assignee: Sony Corporation
    Inventors: Mitsugu Yoshihiro, Takashi Sasao
  • Patent number: 4725895
    Abstract: In a helical-scan video tape recorder, when the color framing of a reproduced video signal when a magnetic tape is stopped and of a reference video signal when an activation command signal is sent to control means for controlling a capstan motor do not coincide, the activation state of a magnetic tape of the video tape recorder (VTR) is so controlled that the color framings of both video signals are quickly matched with each other.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: February 16, 1988
    Assignee: Sony Corporation
    Inventors: Masahiro Miyamoto, Kazuhisa Nishimura, Mitsugu Yoshihiro
  • Patent number: 4698703
    Abstract: A capstan servo system for a video tape recording and/or reproducing apparatus permits recording of a new video signal precisely commenced at a selected edit point. For this, the capstan servo system is provided a tape speed error dependent feedback control feature and a phase error dependent feedback control feature. Tape speed error dependent feedback control is carried out when the recording and/or reproducing apparatus operates in recording or assemble edit mode. Phase error dependent feedback control is carried out when the recording and/or reproducing apparatus operates in reproducing or playback mode.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: October 6, 1987
    Assignee: Sony Corporation
    Inventors: Kazuhisa Nishimura, Mitsugu Yoshihiro, Masaaki Sakai, Seiichi Hataoka
  • Patent number: 4663555
    Abstract: An apparatus for controlling a deflectable head mounted on a bimorph leaf having a detector connected to the latter for detecting a deflection of the bimorph leaf, a drive signal generating circuit for generating a drive signal to deflect the bimorph leaf in response thereto, a combining circuit for combining output signals of the detector and the drive signal generating circuit, a damping signal generating circuit for generating a damping signal to attenuate a distortion of the bimorph leaf that is produced by the deflection of the bimorph leaf, a signal producing circuit for generating a signal corresponding to a variation of the detector that remains after application of the damping signal to the bimorph leaf, and a circuit connected between the signal producing circuit and the combining circuit for compensating and thereby reducing the signal corresponding to the remaining variation of the detector.
    Type: Grant
    Filed: March 4, 1986
    Date of Patent: May 5, 1987
    Assignee: Sony Corporation
    Inventor: Mitsugu Yoshihiro
  • Patent number: 4438377
    Abstract: A stop control circuit for a DC motor causes the motor to stop precisely by purely electrical action. A DC motor is provided with a bidirectional driving circuit, a servo circuit for controlling the driving circuit, and a rotation detector associated with the motor shaft to provide a phase signal that depends, in magnitude and polarity, on the particular rotational angle of the shaft, regardless whether the motor is turning. A stop control circuit then includes an amplifier whose output varies according to the phase signal, and a switch that normally provides the servo signal to the driving circuit, but, upon command, switches over to provide thereto the output of the amplifier as a brake signal. Alternatively the rotation detector can include two sensor elements separated by .pi./2, and the stop control circuit can include an inverting amplifier, a non-inverting amplifier coupled to one of the sensor elements, and a switch circuit with inputs coupled respectively to these amplifiers.
    Type: Grant
    Filed: June 4, 1981
    Date of Patent: March 20, 1984
    Assignee: Sony Corporation
    Inventors: Masaaki Sakai, Mitsugu Yoshihiro