Patents by Inventor Lawrence D. Tipton

Lawrence D. Tipton 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: 6577562
    Abstract: A method to return an automated data storage and retrieval system from a reset state to the ready state. An automated data storage and retrieval system which includes a computer useable medium having computer readable program code disposed therein to implement Applicants' method to return the automated data storage and retrieval system to the ready state from a reset state. A method to allocate storage elements disposed within an automated data storage and retrieval system while that automated data storage and retrieval system is in a reset state. An automated data storage and retrieval system which includes computer readable program code disposed therein to implement Applicants' method to allocate storage elements disposed within an automated data storage and retrieval system while that automated data storage and retrieval system is in a reset state. A method to adjust the system recovery period of an automated data storage and retrieval system after that system is placed in a reset state.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: June 10, 2003
    Assignee: International Business Machines Corporation
    Inventors: Frank David Gallo, Lawrence D. Tipton
  • Publication number: 20020141295
    Abstract: A method to return an automated data storage and retrieval system from a reset state to the ready state. An automated data storage and retrieval system which includes a computer useable medium having computer readable program code disposed therein to implement Applicants' method to return the automated data storage and retrieval system to the ready state from a reset state.
    Type: Application
    Filed: April 2, 2001
    Publication date: October 3, 2002
    Applicant: International Business Machines Corporation
    Inventors: Frank David Gallo, Lawrence D. Tipton
  • Patent number: 5526329
    Abstract: The present invention provides a method and an apparatus to accurately and consistently distinguish blank sectors from written sectors on optical media despite drive and media variations. A readback envelope threshold is established each time optical media is mounted into an optical drive. In one embodiment, the gain of readback amplifiers are set to a first level, the optical head seeks to and reads a sector or set of sectors on the optical disk known to have information recorded thereon and a first readback envelope generated. The gain of the readback preamplifier is then set to a second level, the optical head seeks to and reads another sector or set of sectors known to have information recorded thereon and a second readback envelope generated. The readback threshold is calculated from the amplitudes of the first and second envelopes.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: June 11, 1996
    Assignee: International Business Machines Corporation
    Inventors: John E. Bish, David E. Call, Glen A. Jaquette, Judson A. McDowell, Arturo A. Mojica, Lawrence D. Tipton
  • Patent number: 5430702
    Abstract: The present invention provides a method and an apparatus to accurately and consistently distinguish blank sectors from written sectors on optical media despite drive and media variations. A readback envelope threshold is established each time optical media is mounted into an optical drive. In one embodiment, the gain of readback amplifiers are set to a first level, the optical head seeks to and reads a sector or set of sectors on the optical disk known to have information recorded thereon and a first readback envelope generated. The gain off the readback preamplifier is then set to a second level, the optical head seeks to and reads another sector or set of sectors known to have information recorded thereon and a second readback envelope generated. The readback threshold is calculated from the amplitudes of the first and second envelopes.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: July 4, 1995
    Assignee: International Business Machines Corporation
    Inventors: John E. Bish, David E. Call, Glen A. Jaquette, Judson A. McDowell, Arturo A. Mojica, Lawrence D. Tipton
  • Patent number: 5268893
    Abstract: Calibration of the write signal power level applied to a transducer for marking a moving media to optimize a later recovered read-back signal is provided. An optimized read-back signal is one where the peak-to-peak amplitude of the read-back signal is maximized. The method provides marking test patterns on the recording media at a plurality of discrete, selected write signal power levels of the marking source, developing a read-back signal from the test pattern marks, correlating portions of the read-back signal with the write signal power levels and solving a relationship of the formW.sub.c =W.sub.o -KB.sub.2 /2B.sub.3where W.sub.c is the calibrated write signal power level W.sub.o is an offset write signal power level. K is a minimum differential between write signal power levels B.sub.2 and B.sub.3 are parameters derived from a least squares fit of a second order polynomial equation to data provided by correlating read-back signals with write signal power levels.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: December 7, 1993
    Assignee: International Business Machines Corporation
    Inventors: David E. Call, Lawrence D. Tipton
  • Patent number: 5247498
    Abstract: The invention calculates the number of track crossing signals to be counted until a target position is reached without an actual seek operation, thus making it possible to complete a seek operation in a short time and without the need of the additional seek operation disclosed in the related art. A memory means is provided for storing the relation between the number of tracks (Delta t) from a current position to a target position and an indicator of the movement of said optical head toward said target position. A control means is provided for calculating the number of track crossing signals to be counted during a seek operation based on said stored relation when the target position is given, and for generating a control signal causing said optical head to seek based on the number of the calculated track crossing signals.
    Type: Grant
    Filed: June 13, 1991
    Date of Patent: September 21, 1993
    Assignee: International Business Machines Corporation
    Inventors: Makoto Takekoshi, Lawrence D. Tipton
  • Patent number: 5134602
    Abstract: This disclosure deals with an optical disk recorder/player (drive) of the type that receives a removable disk for signal exchanging operations. Once a disk is inserted into the drive, the rotation of the disk begins a period of accelerating rotational speed called spin up. During spin up, the focus and tracking systems of the drive are calibrated. Once the disks reach a desired operating rotational speed, a menu is provided for determining when to calibrate a laser in the drive for recording operations. Such writing or recording calibration of the laser occurs at different times in accordance with the types of signal processing functions to be performed with respect to the particular disk. Description includes a media library in which a plurality of optical disk drives are controlled in a manner for minimizing access times to any optical disk within the media library.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: July 28, 1992
    Assignee: International Business Machines Corporation
    Inventors: Francisco A. Baca, Alan A. Fennema, Reed A. Hancock, Glen A. Jaquette, Lawrence D. Tipton, Daniel J. Winarski