Patents by Inventor Robert L. Hazel

Robert L. Hazel 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: 10684014
    Abstract: A heat shield panel for a gas turbine engine includes a substrate layer having a first substrate surface and a second substrate surface opposite the first substrate surface. The first substrate surface and the second substrate surface define a substrate layer thickness therebetween. One or more thermally protective coating layers are applied to the first substrate surface of the substrate layer. The one or more coating layers have a constant coating layer thickness and the substrate layer thickness tapers along an axial length of the heat shield panel.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: June 16, 2020
    Assignee: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: San Quach, Brian T. Hazel, Kaitlin M. Tomeo, Robert Selinsky, Jr., Aaron S. Butler, John S. Tu, William F. Werkheiser, Jessica L. Serra
  • Patent number: 8408465
    Abstract: A device for reading optical data cards. This device includes a shuttle mounted on shuttle tracks within the device housing. The shuttle is configured to move back and forth on the shuttle tracks driven by the shuttle motor. A card loader allows optical data cards to be positioned onto the shuttle. A CD optical read head mounted on optical read head tracks and driven by a optical head motor reads modified to read a single track of optical card data reads the optical card. A controller receives data from the read head and controls the movement of the shuttle and the optical head.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: April 2, 2013
    Assignee: Lasercard Corporation
    Inventor: Robert L. Hazel
  • Publication number: 20110315769
    Abstract: A device for reading optical data cards. This device includes a shuttle mounted on shuttle tracks within the device housing. The shuttle is configured to move back and forth on the shuttle tracks driven by the shuttle motor. A card loader allows optical data cards to be positioned onto the shuttle. A CD optical read head mounted on optical read head tracks and driven by a optical head motor reads modified to read a single track of optical card data reads the optical card. A controller receives data from the read head and controls the movement of the shuttle and the optical head.
    Type: Application
    Filed: September 2, 2011
    Publication date: December 29, 2011
    Applicant: LASERCARD CORPORATION
    Inventor: Robert L. Hazel
  • Patent number: 8033467
    Abstract: A device for reading optical data cards. This device includes a shuttle mounted on shuttle tracks within the device housing. The shuttle is configured to move back and forth on the shuttle tracks driven by the shuttle motor. A card loader allows optical data cards to be positioned onto the shuttle. A CD optical read head mounted on optical read head tracks and driven by a optical head motor reads modified to read a single track of optical card data reads the optical card. A controller receives data from the read head and controls the movement of the shuttle and the optical head.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: October 11, 2011
    Assignee: Lasercard Corporation
    Inventor: Robert L. Hazel
  • Publication number: 20090032594
    Abstract: A device for reading optical data cards. This device includes a shuttle mounted on shuttle tracks within the device housing. The shuttle is configured to move back and forth on the shuttle tracks driven by the shuttle motor. A card loader allows optical data cards to be positioned onto the shuttle. A CD optical read head mounted on optical read head tracks and driven by a optical head motor reads modified to read a single track of optical card data reads the optical card. A controller receives data from the read head and controls the movement of the shuttle and the optical head.
    Type: Application
    Filed: July 30, 2007
    Publication date: February 5, 2009
    Applicant: LASERCARD CORPORATION
    Inventor: Robert L. Hazel
  • Patent number: 5268801
    Abstract: A system and method for writing reference information on a recording media contained with a sealed housing utilizes a reflective planar mirror on the rotary actuator controlling the writing mechanism. A narrow beam directed through a window on the side wall of the housing onto the mirror is reflected off at angle dependent on the actuator position to a beam sensitive detector. A translator system driven by a positioner disposed at a distance from the rotary actuator axis which is substantially greater than the distance between the actuator axis and the writing head, is used to vary the relationship between the directed and reflected beams. This system incorporates the rotary actuator in a closed loop servo that positions the actuator precisely at different locations relative to the recording medium, so that the reference information may be written.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: December 7, 1993
    Assignee: Servo Track Writer Corporation
    Inventors: Robert L. Hazel, Gajus Michelson, William W. Valliant
  • Patent number: 4972397
    Abstract: A data logger which incorporates a laser diode and focusing optics for logging data pits in optical recording media. The focusing optics may be attached to a spring assembly and caused to oscillate by electromagnetic or mechanical means. As the optical elements oscillate, the focused beam dithers above and below the surface of the recording media. When the laser beam focal region is in the plane of the recording surface a pit or deformation is formed in the surface. Relative motion is provided between the recording surface and the laser beam spot for further writing on the recording surface.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: November 20, 1990
    Assignee: Drexler Technology Corporation
    Inventors: Larry S. Zurbrick, Robert L. Hazel
  • Patent number: 4888759
    Abstract: An optical memory system is disclosed employing laser beams for reading and writing data in an optical disk. The system incorporates a specially designed spatial combining and separating device which functions to combine a writing laser beam with a plurality of reading laser beams in a manner so as to permit the combined beams to be precisely focused on the disk. The spatial combining and separating device also functions to separate the reading laser beams from the writing laser beam after they are reflected from the disk in a manner so as to prevent the higher intensity writing beam from interfering with the proper detection of the lower intensity reading beams.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: December 19, 1989
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Gilbert Y. H. Chan
  • Patent number: 4622659
    Abstract: Focus detecting apparatus is disclosed which is useful, for example, in an optical storage system for detecting the quality of focusing of a laser beam on the surface of an optical medium. For focus detection purposes, the reflected beam is collected and separated into two beams which are applied to first and second photosensitive elements, respectively. Focus detection is achieved based on determining the difference between the diameters of the beams incident on the photosensitive elements which are located so that the diameters of the beams applied thereto are indicative of the quality of focusing of the beam on the surface.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: November 11, 1986
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Gilbert Y. Chan
  • Patent number: 4621353
    Abstract: An optical storage system is disclosed having improved spatial combining and separating apparatus along with improved focus detection and control apparatus. The spatial combining and separating apparatus functions to precisely combine a writing laser beam with a reading beam prior to focusing on an optical medium, and also functions to separate the reading and writing beams after reflection from the medium in a manner so as to prevent interference therebetween. The improved focus detecting and control apparatus employs a portion of the reflected reading beam to derive two beams which are applied to first and second photosensitive elements, respectively. Focus detection is achieved based on determining the difference between the diameters of the beams incident on the photosensitive elements which are located so that the diameters of the beams applied thereto are indicative of the quality of focusing of the beam on the surface.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: November 4, 1986
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Gilbert Y. Chan
  • Patent number: 4562568
    Abstract: Optical apparatus is disclosed for spatially combining and/or separating a plurality of reading and writing laser beams as required, for example, in an optical memory system. The apparatus includes a spatial combining and separating device comprising a thin transparent element which is provided with reflective and anti-reflective coatings and an appropriately located opening in a manner so as to permit the original and reflected writing beams to pass through the device without change in direction while the original and reflected reading beams are reflected from the device in predetermined directions.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: December 31, 1985
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Gilbert Y. Chan
  • Patent number: 4559622
    Abstract: An optical storage system is disclosed having improved focus detecting and controlling apparatus which is responsive to a reading laser beam reflected from an optical medium so as to provide a focus error signal having a high gain in the immediate vicinity of the in-focus position along with a wide capture range. Focus detection is achieved based on determining the difference between the diameters of the beams applied to a pair of photosensitive elements located so that the diameters of the beams applied thereto are indicative of the quality of focusing of the reading beam on the optical medium.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: December 17, 1985
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Gilbert Y. Chan
  • Patent number: 4544964
    Abstract: A principle embodiment teaches a strobing method and associated apparatus for magnetic recording/detecting systems especially adapted for use in high performance, high capacity, low cost disk drives wherein there is provided strobing means adapted to produce a chain of timing pulses and to distribute them relatively uniformly across a data cell of variable length and so provide a sampling means for such cells.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: October 1, 1985
    Assignee: Burroughs Corporation
    Inventors: Kenneth R. Burns, Robert L. Hazel
  • Patent number: 4494226
    Abstract: A three beam laser optical system comprising a writing beam and two reading beams all incident on the same track of a rotating disk optical recording medium. One of the reading beams is incident on the track ahead of the writing beam so as to serve as a read-before-write beam, while the other reading beam is incident on the track behind the recording beam so as to serve as a read-after-write beam. The read-before-write beam is used during the recording of data to provide an advance indication as to whether there is previously recorded data ahead of the writing beam, in which case the recording operation is interrupted to prevent an overwrite error. The read-after-write beam is used during recording to check the accuracy of the recording operation.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: January 15, 1985
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Edward V. LaBudde
  • Patent number: 4443870
    Abstract: A laser optical system including a reading beam for reading optical data recorded in one or more tracks of a rotating disk optical recording medium. The disk includes a plurality of preformatted headers spaced along the track wherein each header includes first and second track following optical holes which are elongated in the direction of the track and disposed on opposite sides of the track center line in a staggered relationship along the track. Traversal of these track following holes by the reading beam produces a reflected beam which varies in a manner dependent upon the accuracy of positioning of the beam relative to the track center line. Up-down integration circuitry responsive to this reflected beam is used to produce a track following signal which is applied to a radial position control motor for maintaining the beam precisely on the track center line.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: April 17, 1984
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Edward V. LaBudde
  • Patent number: 4428075
    Abstract: A method for preformatting each track of an optical disk with spaced header patterns using a plurality of overlapping, individually modulated writing laser beams arranged in a line perpendicular to the track. All of the writing laser beams are derived from a single multi-line laser so as to provide high positioning stability, and adjacent beams are chosen to have different wavelengths in order to prevent the deleterious effects of coherent interference between the overlapping beams. A specific header pattern is provided on a single pass by turning on different ones of the writing beams during specific time periods as each header recording area is traversed. A laser read-after-write beam is additionally provided to permit immediate verification of the recorded header pattern.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: January 24, 1984
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, John E. Kammerud
  • Patent number: 4428069
    Abstract: An apparatus for preformatting each track of an optical disk with spaced header patterns using a plurality of overlapping, individually modulated writing laser beams arranged in a line perpendicular to the track. All of the writing laser beams are derived from a single multi-line laser so as to provide high positioning stability, and adjacent beams are chosen to have different wavelengths in order to prevent the deleterious effects of coherent interference between the overlapping beams. A specific header pattern is provided on a single pass by turning on different ones of the writing beams during specific time periods as each header recording area is traversed. A laser read-after-write beam is additionally provided to permit immediate verification of the recorded header pattern.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: January 24, 1984
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, John E. Kammerud
  • Patent number: 4417330
    Abstract: A laser optical system including a reading beam for reading optical data recorded in one or more tracks of a rotating disk optical recording medium. The disk includes a plurality of preformatted headers spaced along the track wherein each header includes a plurality of spaced focusing optical holes having dimensions chosen based on the diameter of the focused laser beam spot. Traversal of these optical holes by the reading beam produces a reflected beam which varies in a manner dependent upon the quality of focusing of the beam. Peak detection circuitry responsive to this reflected beam is used to produce a high gain focusing signal which is combined with a low gain, high capture range focusing signal provided by a geometric focus detector to derive a precise, offset-free focusing control signal which is applied to a focusing motor to main precise focusing of the beam on the disk.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: November 22, 1983
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Edward V. LaBudde
  • Patent number: 4402061
    Abstract: A preformatted optical recording disk for use in an optical data storage system in which a laser beam of predetermined frequency is focused on the disk. The disk comprises a substrate having reflective, dielectric and absorbing layers deposited in a manner so as to establish an anti-reflection condition for an incident laser beam. The disk is preformatted by recording optical holes in the absorbing layer so as to form one or more tracks wherein each track includes a plurality of headers positioned at predetermined locations along the track. Each header comprises a plurality of optical holes constructed and arranged so as to constitute predetermined embedded timing, track following and focusing data on the disk for use by an optical data storage system.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: August 30, 1983
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Edward V. LaBudde