Patents by Inventor Rudolf Ochmann

Rudolf Ochmann 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).

  • X-ray generator incorporating dose rate control
    Patent number: 4797905
    Abstract: The invention relates to an X-ray generator including a controller for the dose rate. In order to enable universal use of this controller for different types of examination, use is made of a sampling controller in the form of a microprocessor system. There are provided memories in which the sampling frequency and the adjustment functions are stored for the various types of examination as well as the programs on the basis of which the sampling controller calculates the adjustment values for the various types of examination.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: January 10, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Rudolf Ochmann, Robert H. Zimmermann
  • Method of and apparatus for controlling the electric power applied to a rotary-anode X-ray tube
    Patent number: 4363971
    Abstract: The temperature of the anode disc of a rotary-anode X-ray tube is continuously determined by means of the method apparatus in accordance with the invention. When the temperature exceeds a first limit value, the power of the X-ray tube is reduced to a fraction (for example, 80%) of the otherwise permissible power. When a second limit value of the anode disc temperature is exceeded, exposures are completely inhibited. In the case of exposures which are performed in rapid succession with a comparatively low power, it may occur that the anode disc temperature does not reach the second limit value, but that the mean value of the applied electric power is so high that the bearing of the rotary anode, and possibly also the joint between the anode shaft and the rotor, is overloaded. Overloading is prevented by generating a bearing-temperature signal indicative of the rotary anode bearing temperature and comparing it with a third limit value.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: December 14, 1982
    Assignee: U.S. Philips Corporation
    Inventor: Rudolf Ochmann
  • Control device, particularly for controlling the emission current of an X-ray tube
    Patent number: 4180761
    Abstract: A control device for controlling the emission current of an x-ray tube comprising a control circuit which receives a digital reference value signal and an amplifier whose gain is controlled by a portion of said digital reference value signal so as to provide a comparatively high accuracy for the emission current adjustment with a minimum number of binary positions.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: December 25, 1979
    Assignee: U.S. Philips Corporation
    Inventor: Rudolf Ochmann
  • Circuit for adjusting tube anode current in an X-ray generator
    Patent number: 4177406
    Abstract: Filament current values associated with different X-ray tube anode currents and voltages are stored in various locations of a memory. For an X-ray exposure, the measured value of filament current or anode current is compared with the values stored and the values stored are connected, if necessary. Variations of the emission characteristics of the X-ray tubes as caused, for example, by aging are thus automatically corrected.
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: December 4, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Bernd Hermeyer, Rudolf Ochmann