Patents by Inventor Peter Mahr

Peter Mahr 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: 6208096
    Abstract: In a tape transport for recording and/or reproducing signals by means of a recording medium using separate winding motors for driving the winding plates, the drive of the winding motors servo units is constructed as open-loop control devices and/or closed-loop control devices. Such servo units can advantageously be used for open-loop control and/or closed-loop control of the drive of the winding motor even during a braking operation.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: March 27, 2001
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Peter Mahr, Klaus Oldermann
  • Patent number: 6167005
    Abstract: The invention relates to a tracking device in which a position of a coil driven actuator is determined using a sensor coil. A reference signal 12 having a determined voltage and frequency is fed to a driven coil. A position of the coil driven actuator is proportional to a distance between the driving coil and the sensor coil. The sensor coil produces an alternating voltage induced by an alternating magnetic field emitted by the driving coil. The alternating voltage is used to determine the position of the actuator.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: December 26, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Juergen Kaaden, Peter Mahr, Gerhard Reiner
  • Patent number: 6122134
    Abstract: An information storage medium has at least a longitudinal bundle comprising three servo tracks (3, 4, 5). The bundle is arranged in consecutive tracking units (T(N)) of a determined longitudinal length. Surfaces of said servo tracks present either a first or a second characteristic (6, 7) and vary in size and distribution inside the tracking units. The bundles may contain longitudinally stored identification information. Methods for obtaining tracking signals indicating a transversal offset between a reading head and the bundle and for retrieving identification information are disclosed. Also methods for obtaining tracking units in which transversal tracking code is combined with distinct information are described.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: September 19, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Jurgen Kaaden, Klaus Oldermann, Peter Mahr, Gerhard Reiner, Bruno Weihs
  • Patent number: 6043958
    Abstract: The invention relates to a device for positioning a first element relatively to a second element. The device according to the invention uses lifting means comprising a cam element and actuator means to actuate the cam element. The cam element has a plurality of contiguously arranged sectors with machined edges belonging to first and second interleaved groups. The machined edges are shaped such that a response of the lifting means to the actuator means has different values for sectors of said first and second group thereby providing alternately a coarse positioning and a fine positioning. The device may for example be used to position a multitrack magnetic tape and a magnetic writing/reading head relatively to each other.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: March 28, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Juergen Kaaden, Peter Mahr, Klaus Oldermann
  • Patent number: 5917671
    Abstract: The invention relates to a method for recording longitudinal track bundles on an information medium. The method involves recording tracking information in special tracks in said track bundles. The special tracks are contiguous between each other. When recording a new track bundle a recording and/or reading head may be positioned using tracking information contained in special tracks of a previously recorded track bundle. Several examples of patterns used for coding tracking information in the special tracks we described.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: June 29, 1999
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Juergen Kaaden, Andreas Kluger, Martin Kuner, Peter Mahr, Klaus Oldermann, Hartmut Peters, Gerhard Reiner, Werner Scholz, Friedrich Timmermann, Bernd Wessolly
  • Patent number: 5912543
    Abstract: Electronic circuit having a digital controller operation of a synchronous motor.Precision motors for driving, for example, a video head drum in video recorders are normally designed as externally commutated synchronous motors. These motors are driven with square-wave voltages by a digital controller (CON), whose circuitry can easily be implemented.The object of the present invention is to specify an electronic circuit of the type mentioned initially for controlling a synchronous motor, which enables good synchronism and the motor to be operated with little electrical noise.This object is achieved in that the synchronous motor is driven by sinusoidal signals, a separate control signal from the controller (CON) influencing the amplitudes of the drive signals (U1, V1, W1). A regulating signal for regulating the synchronous motor is produced by a sensor (GE) which is arranged on the synchronous motor, which regulating signal produces a fixed phase relationship between rotor revolution and drive signals.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: June 15, 1999
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Peter Mahr, Gerhard Reiner
  • Patent number: 5911034
    Abstract: In order to produce synchronous control signals of a video recorder, in particular of a digital video recorder, a position pulse of the scanner motor, which coincides with the beginning of the video frame, is used as time zero point. Time markers in which changes in the control signals take place are calculated starting from this time zero point. These time markers and the bit patterns occurring at these time markers are stored as data words in a data field and, for corresponding time markers, the corresponding data word is output in parallel, that is to say synchronously. A realization is possible by means of a microcontroller and a controllable output memory, the microcontroller containing the functions of capture register, timer, calculation unit and comparator.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: June 8, 1999
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Peter Mahr, Gerhard Reiner
  • Patent number: 5644675
    Abstract: A time coding system of high resolution for a digital audio and video recording system is disclosed. Various methods of structuring: time code for recording are disclosed which enable time code reading at high tape transport speeds to facilitate automatic search/forward and reverse. A time and control code generator for video recording and replay use comprises a pulse generator generating a pulse having a television frame frequency repetition rate. A source of a time code signal is related to the television frame frequency, and comprises data bits representing hours minutes seconds and frames. A pulse position modulation means is coupled to the pulse and in response to the data its representing hours minutes seconds, modulates a trailing edge of the pulse to a first position responsive to the data bits having a logical 1 value and modulates the trailing edge to a second position responsive to the data bits having a logical 0 value.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: July 1, 1997
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Jurgen Kaaden, Gerhard Reiner, Peter Mahr
  • Patent number: 5161479
    Abstract: Liquid crystal polymer films are laminated to a textile substrate in a specific fashion to produce a fabric especially useful for sail panels.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: November 10, 1992
    Assignee: North Sails Group, Inc.
    Inventor: Peter Mahr
  • Patent number: 5099465
    Abstract: Compact disk changer with a playback section and a magazine with compartments for holding compact disks. The playback section and the magazine are moved relative to each other up and down for removing compact disks from the magazine. The compact disks are scanned optically in the magazine compartment to attain a predetermined relative position between the playback section and the magazine for the purpose of removing a selected disk. The compact disks in the compartments are detected by light conductors which extend into the magazine compartments. The disks have peripheral rims that do not reflect light.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: March 24, 1992
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Erich Geiger, Peter Mahr
  • Patent number: 5034829
    Abstract: A rotating head wheel for a recorder wherein the head wheel is additionally displaceable in the direction of its axis of rotation. The displacement is produced by mounting the head wheel on a threaded spindle which rotates in the same direction as the head wheel and whose rate of rotation is variable. A first sensor generates a pulse each revolution of the head wheel. A second sensor generates a pulse each revolution of the threaded spindle. The pulses of the first and second sensors and a pulse produced by a position sensor are used for controlling the magnitude of the displacement.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: July 23, 1991
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventor: Peter Mahr
  • Patent number: 4590121
    Abstract: Sail cloth is made up from a plurality of yarns in one direction woven together with a plurality of film tapes in the other direction to provide a cloth having improved properties.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: May 20, 1986
    Inventor: Peter Mahr
  • Patent number: 4554205
    Abstract: An improved sailcloth is composed of a laminate of two fabrics, are being tightly woven, light weight, highly resinated cloth, and the other being a loosely woven or knit fabric.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: November 19, 1985
    Inventor: Peter Mahr