Patents Represented by Attorney Harry G. Thibault

Find this attorney in the Justia Lawyer Directory

  • Transducing head mounting on an unsupported length of spring
    Patent number: 4731685
    Abstract: To stabilize the transducing head of a magnetic disc memory apparatus, the head is mounted on a flexible leaf aligned transverse to the disc radius; the upstream leaf end is fixed to the head carriage, and the downstream leaf end is restrained against motion normal to the disc surface. The head is secured at a point on the leaf where the tangent to the leaf is always parallel to the disc surface; the head may be balanced on both sides of the leaf; and the leaf may be formed of two parallel members with torsional vibration damping material therebetween.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: March 15, 1988
    Assignee: Ampex Corporation
    Inventor: Frederic K. Orcutt
  • Single piece tape reel and assembly
    Patent number: 4715558
    Abstract: A single piece tape reel and assembly which combines a hub portion, a bottom flange and a top bearing cover into a one-piece member of substantially improved rotational stability.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: December 29, 1987
    Assignee: Ampex Corporation
    Inventors: Kenneth E. Fair, Charles M. Campbell
  • Door operating mechanism for a cassette usable in a magnetic tape recorder
    Patent number: 4685016
    Abstract: A door operating mechanism for a magnetic tape cassette, such mechanism including a door latch mechanism provided in the cassette capable of rotating a door assembly of the cassette from the fully closed to the fully opened position and designed to prevent the engagement of the door assembly with the tape run contained within the cassette.
    Type: Grant
    Filed: August 20, 1985
    Date of Patent: August 4, 1987
    Assignee: Ampex Corporation
    Inventor: Antoni S. Baranski
  • Single oscillator PAL generator lock system
    Patent number: 4675723
    Abstract: A signal generator for generating a clocked PAL reference video signal from a single signal source wherein a counter-divider extracts subcarrier frequency component from the PAL reference video signal and modulator means in combination with a counter-divider extracts a horizontal frequency component from the PAL reference video signal, the single signal source permitting the signal components extracted therefrom to be fixed in a precise mathematical relationship.
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: June 23, 1987
    Assignee: Ampex Corporation
    Inventor: Rylan D. Luke
  • Adjustable front control panel for a tape transport component arrangement
    Patent number: 4667271
    Abstract: A tape transport front panel is adjustable to position the controls conveniently for operators in various positions.
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: May 19, 1987
    Assignee: Ampex Corporation
    Inventor: George A. Wilson
  • Latch for head positioning actuator for disc files
    Patent number: 4654735
    Abstract: A latch for the pivoting head arm of a data-storage magnetic disc machine, in which a U-shaped latching member is arranged to avoid malfunctioning to block the movement of the arm, and may be operated entirely by means of a toggle spring, or entirely by means of a magnetic arrangement or cooperatively with both.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: March 31, 1987
    Assignee: Ampex Corporation
    Inventors: Valentin Izraelev, Dimitri D. Scherlizin
  • Fast deploying tape transport
    Patent number: 4652946
    Abstract: A machine for extracting tape from a cassette and for threading the tape to a monoplanar disposition for longitudinal shuttling and transducing by fixed transducing heads, and then further threading the tape, if desired, to a helical disposition around a rotating head and scanning drum assembly without interrupting the longitudinal shuttling or transducing action.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: March 24, 1987
    Assignee: Ampex Corporation
    Inventor: Dennis M. Ryan
  • Bang-bang controlled velocity command generator
    Patent number: 4638230
    Abstract: In a disc information storage system which employs a servo data disc, a servo data head and a moveable carriage assembly for transporting a plurality of magnetic heads radially across the surface of the disc in response to a control signal produced in connection with a velocity command signal, an improved method and apparatus for production of a velocity command signal wherein one or a plurality of discrete velocity steps are added to the velocity command signal in a region which would otherwise indicate only a single value for velocity.
    Type: Grant
    Filed: November 8, 1985
    Date of Patent: January 20, 1987
    Assignee: Ampex Corporation
    Inventor: Patrick S. Lee
  • Indexing means for tape cassette
    Patent number: 4635878
    Abstract: A tape cassette has a springloaded indexing mechanism to urge the cassette reels in a tape winding directions so as to tension the free run of tape between the reels whenever the cassette is removed from the tape transport machine.
    Type: Grant
    Filed: May 20, 1985
    Date of Patent: January 13, 1987
    Assignee: Ampex Corporation
    Inventor: Neal A. Didriksen
  • Magnetic tachometer assembly
    Patent number: 4611168
    Abstract: A tachometer assembly comprises two toothed rings (68, 70) in approximate axial register. The rings have similar peripheries of which the teeth (69, 71) are closely spaced in the axial direction of the rings. Magnetic flux in a path extending axially of the teeth varies as the rings rotate and is sensed by a coil (74) disposed coaxially of the rings.
    Type: Grant
    Filed: September 15, 1983
    Date of Patent: September 9, 1986
    Assignees: Ampex Corporation, Kudelski S.A.
    Inventors: Stefan Kudelski, Ernest Rosselet
  • Particle free linear motor
    Patent number: 4603270
    Abstract: An arrangement for a linear motor which uses a shorted turn as a shield for the magnet of the motor to thus provide a substantial reduction in the introduction of particulate matter into the Head Disk Assembly environment associated with the linear motor, without substantially increasing the reluctance of the magnetic circuit of the motor.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: July 29, 1986
    Assignee: Ampex Corporation
    Inventor: Peter C. Van Davelaar
  • Control system for an electric motor
    Patent number: 4591768
    Abstract: A control system for a motor which drives a tape capstan includes a capacitor (91) which holds a sample of a ramp signal which is sampled and restarted in response to tachometer pulses. The output of an amplifier (90, 100) which amplifies the difference between the stored voltage and a reference is integrated by a passive integrator (106, 92) coupled to the capacitor (91). The arrangement provides prediction of change of a discontinuous speed signal and is useful for slow running motors of low inertia.
    Type: Grant
    Filed: September 15, 1983
    Date of Patent: May 27, 1986
    Assignees: Ampex Corporation, Kudelski S.A.
    Inventor: Stefan Kudelski
  • Directional control for tape reel
    Patent number: 4587578
    Abstract: A tape transport of the U-coiling type having a takeup reel that rewinds in a clockwise direction is provided with a switch reversing this direction to anti-clockwise for rewinding a Z-coiled reel, and the switch is provided with a coordinating portion that clears the tape path only for the coiling direction that corresponds with the switch setting.
    Type: Grant
    Filed: April 8, 1983
    Date of Patent: May 6, 1986
    Assignee: Ampex Corporation
    Inventor: Stephen R. desJardins
  • Electroless plating method and apparatus
    Patent number: 4581260
    Abstract: An electroless plating bath tank with air sparging and bath heating attachments is provided with a workpiece rack on which multiple horizontal spindles bearing workpieces are rotated about their own axes while also being rotated eccentrically about a horizontal axis, so as to expose the workpiece more uniformly to the action of the bath.
    Type: Grant
    Filed: September 25, 1984
    Date of Patent: April 8, 1986
    Assignee: Ampex Corporation
    Inventor: Shamil A. Mawla
  • Reproducible gray scale test chart for television cameras
    Patent number: 4575124
    Abstract: A gray scale test chart for television cameras, in the form of either a transmittance chart or reflectance chart, includes one or more regions having selected gray values for calibrating or adjusting the output signal of the television camera, each gray value region being formed by an array of uniformly black dots arranged on a uniformly white background in a spatial frequency selected with respect to the resolution capability of the camera to produce an integrated output signal while being within the resolution capability of a photographic or other chart reproduction technique, the size of the dots in each region determining its gray value in combination with the spatial frequency or center-to-center spacing of the dots.
    Type: Grant
    Filed: March 20, 1984
    Date of Patent: March 11, 1986
    Assignee: Ampex Corporation
    Inventor: Eric F. Morrison
  • Warming cap for a shoe or boot
    Patent number: D284615
    Type: Grant
    Filed: June 8, 1982
    Date of Patent: July 15, 1986
    Inventors: Harold E. Rock, Stephen E. Palen
  • Clip board
    Patent number: D284776
    Type: Grant
    Filed: April 6, 1983
    Date of Patent: July 22, 1986
    Assignee: Ampex Corporation
    Inventor: Raymond J. McKinnon, Jr.
  • Data processing set
    Patent number: D285924
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: September 30, 1986
    Assignee: Ampex Corporation
    Inventors: George A. Wilson, Raymond J. McKinnon, Jr.
  • Weatherproof carrying case for a video recorder or the like
    Patent number: D293623
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: January 12, 1988
    Assignee: Ampex Corporation
    Inventor: Darrell S. Staley
  • Control panel for a videotape recorder
    Patent number: D294493
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: March 1, 1988
    Assignee: Ampex Corporation
    Inventor: Darrell S. Staley