Patents by Inventor Jon C. Taenzer

Jon C. Taenzer 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: 4625158
    Abstract: An amplifier circuit for controlling a direct drive motor has an input circuit for converting the digital control word to a pulse width modulated signal which is coupled to a control input of the amplifier through an isolation device. This isolation device and the other gain devices as well as many of the test circuitry devices and the feedback circuitry are referenced to a common, internally generated, stable reference level voltage. An input position control signal is coupled to an operational amplifier whose other inputs is a signal representing the current through the coil at any time. The output of the operational amplifier is a signals which will seek to equalize the two inputs signals. The output of the operational amplifier is coupled to the two controlling transistors which provide the drive current to the motor coil. Diodes are appropriately coupled to the switching transistor to incorporate regeneration effects for the minimization of power consumption.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: November 25, 1986
    Assignee: Adept Technology, Inc.
    Inventor: Jon C. Taenzer
  • Patent number: 4486076
    Abstract: A pair of image fields which are views of an object from two slightly different angles at near enough the same time to constitute a stereo image field pair is produced by providing a pair of similar coaxial counterrotating refracting prisms between the object viewed and the image field and alternately transmitting an image field through the prisms on opposite sides of the plane through or parallel to the central axis of the two prisms.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: December 4, 1984
    Assignee: SRI International
    Inventor: Jon C. Taenzer
  • Patent number: 4476874
    Abstract: Method and apparatus for obtaining quantitative velocity profile measurements and for displaying the same are disclosed. From such velocity measurements, instantaneous volume flow within a vessel across which the measurements are obtained is calculated. In one operating mode, a real-time display of quantitative velocity profiles is provided together with a scrolling display of a plurality of total instantaneous volume flow measurements. In another operating mode, velocity profiles obtained at corresponding points in successive cardiac cycles are averaged to obtain a plurality of average velocity profiles which are selectively displayed under operator control. In this mode of operation, a fixed display of total instantaneous volume flow measurements obtained over a period of time which includes at least one cardiac cycle is provided.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: October 16, 1984
    Assignee: SRI International
    Inventors: Jon C. Taenzer, Donald J. Burch, Philip S. Green
  • Patent number: 4457175
    Abstract: The insonification apparatus is designed for the examination of an object, preferably for medical examinations. The apparatus contains an ultrasonic wave-generating transducer for emitting ultrasonic waves toward an examination plane, and an imaging device having principal planes for passing ultrasound waves received from the examination plane toward an imaging plane. The acoustic image formed in the imaging plane is received by a receiving transducer and transferred into electrical signals. The apparatus also contains an ultrasound condensing device such as a lens, a mirror, or a combination of such elements. This condensing device forms an ultrasonic image of the wave-generating transducer in the aperture of the imaging device. Thus, an increased uniformity of the intensity distribution in the image plane and an increased image contrast for high-spatial frequency information are obtained.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: July 3, 1984
    Assignee: Siemens AG
    Inventors: S. David Ramsey, Jr., Jon C. Taenzer
  • Patent number: 4452084
    Abstract: An ultrasonic transmitting and/or receiving transducer is disclosed which includes a piezoelectric body with electrodes at opposite faces thereof. At least one of the electrodes is in the form of an elongated strip conductor such that the transducer also functions as a lossy delay line. The beam pattern of the transducer is dependent upon the delay of the delay line. A high permeability member such as a ferrite body is located adjacent the elongated strip conductor to increase the distributed inductance of the delay line and, consequently, the delay thereof. The permeability of the ferrite body is controlled by use of a drive coil adjacent thereto. By time varying the drive current to the coil, the acoustic beam pattern is time varied. By using a spiral shaped elongated strip conductor on a cylindrical shaped piezoelectric body, a focusing transducer is provided.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: June 5, 1984
    Assignee: SRI International
    Inventor: Jon C. Taenzer
  • Patent number: 4434799
    Abstract: The apparatus incorporates an ultrasonic wave-generating transducer for providing ultrasonic waves, a first and a second ultrasound window, a first guiding device for guiding the ultrasonic waves to the first window, an ultrasonic receiving transducer for transforming an acoustic image field received from the second window into electrical signals, and a second guiding device for guiding ultrasound transmitted through the second window to the receiving transducer. The ultrasound windows define an examination gap for insonifying a patient's organ positioned therein. The apparatus further incorporates a curved mirror for focusing the acoustic image field received from the gap onto the receiving transducer. The mirror is attached to a rocking device. Thus, the curved mirror is also used for scanning or sweeping the acoustic image field across the receiving transducer. Thus, an image of the object plane under examination is obtained.
    Type: Grant
    Filed: March 2, 1982
    Date of Patent: March 6, 1984
    Assignee: Siemens AG
    Inventor: Jon C. Taenzer
  • Patent number: 4433690
    Abstract: The apparatus incorporates an ultrasonic wave-generating transducer for providing ultrasonic waves, a first and a second ultrasound window, a first guiding device for guiding the ultrasonic waves to the first window, an ultrasonic receiving transducer for transforming an acoustic image field received from the second window into electrical signals, and a second guiding device for guiding ultrasound transmitted through the second window to the receiving transducer. The ultrasound windows define an examination gap for insonifying a patient's organ positioned therein. The apparatus further incorporates a lens for focusing the acoustic image field received from the gap onto the receiving transducer. A mirror device, preferably a plane mirror, is associated with the second guiding device. This mirror deflects ultrasound energy that passes through the gap in a direction which is different from the main insonification direction in the gap.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: February 28, 1984
    Assignee: Siemens AG
    Inventors: Philip S. Green, Jon C. Taenzer
  • Patent number: 4409839
    Abstract: The ultrasonic apparatus contains an imaging lens for focusing ultrasound waves, a diverging device for receiving converging ultrasound waves from the lens and for transmitting ultrasound waves such that beams coming from a single object point are focused along a focal line, and an ultrasound detector positioned at the focal line indicating the ultrasound waves. The detector contains a large number of elongated detector elements. In particular, the diverging device comprises an acoustic mirror containing a reflecting surface which has a diverging effect on impinging beams of ultrasound waves. Preferably, the mirror may have a reflecting surface which is formed by a large number of parallel parabolic lines.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: October 18, 1983
    Assignee: Siemens AG
    Inventor: Jon C. Taenzer
  • Patent number: 4238962
    Abstract: A real time scanned transducer ultrasonic imaging system is disclosed having an improved mechanical scanning system for reciprocating its transducer. The transducer is immersed in a fluid containing chamber. The drive system includes monitoring equipment which produces signals indicating transducer position. Imaging electronics processes (1) electrical signals produced by the transducer in response to ultrasonic echoes, and (2) the transducer position signals from the monitor. Display apparatus produces substantially real time ultrasonically derived images. The drive system includes a transducer carriage which reciprocates on guide rod structure. A drive arm is coupled to the carriage by a compliant coupling element. A drive shaft attached to the drive arm extends through a wall of the chamber, such that the drive shaft oscillates the drive arm.
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: December 16, 1980
    Assignee: Picker Corporation
    Inventor: Jon C. Taenzer
  • Patent number: 4237901
    Abstract: A diagnostic ultrasound real time B-scanner system has an improved probe assembly for fluid coupling a movable axis transducer to a patient's body. Pressure is maintained both low and constant by means of a passive pressure compensation apparatus. The probe includes apparatus containing the transducer and a fluid medium and including a compliant subject contacting bag. Pressure exerted by the bag on a subject is a function of (1) the pressure exerted on the fluid medium and (2) the orientation of the probe, due to the shifting weight of the fluid. The passive pressure compensator apparatus includes a gravity actuated apparatus for varying the pressure on the fluid medium as a function of the spatial orientation of the probe. This pressure variation compensates for the weight of the fluid medium and stabilizes the coupling pressure on the surface of the patient's body.
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: December 9, 1980
    Assignee: Picker Corporation
    Inventor: Jon C. Taenzer
  • Patent number: 4141347
    Abstract: Pulsed real-time B-scan ultrasonic method and apparatus are disclosed together with pulsed Doppler Ulrasonic method and apparatus. The B-scan apparatus includes a pulse operated transmitter and receiver operating at a first frequency, and the Doppler apparatus includes a pulse operated transmitter and receiver operating at a second frequency sufficiently far removed from the B-scan frequency to avoid interference therebetween. A synchronous pulse operation of the B-scan and Doppler systems is provided. The sysem includes a visual display means to which the receiver outputs are connected through a multiplexer operated to pass the B-scan receiver output to the visual display means whenever such B-scan output is present. The Doppler apparatus includes means for temporarily storing the Doppler receiver output, which stored Doppler signals subsequently are read out through the multiplexer to the visual display means between select lines of B-scan display.
    Type: Grant
    Filed: September 21, 1976
    Date of Patent: February 27, 1979
    Assignee: SRI International
    Inventors: Philip S. Green, Louis F. Schaefer, Jon C. Taenzer, John F. Holzemer, S. David Ramsey, Jr., Joe R. Suarez
  • Patent number: 4065976
    Abstract: Mechanical scanning apparatus is shown which includes a parallelogram linkage comprising a pair of parallel arms and parallel first and second connecting links adjacent opposite ends of the arms pivotally connected thereto. Transducer means, such as an ultrasonic transducer or transducer array, included in the ultrasonic imaging system, or the like, are attached to said first connecting link for movement therewith. First supporting means, adjacent the arm ends opposite the transducer means, support the parallelogram linkage thereat for movement along an arcuate path which closely approximates a portion of an ellipse adjacent a focus thereof. Constraining means, intermediate the first supporting means and transducer means, limit an intermediate portion of the parallelogram linkage to generally straight line movement along a path which extends substantially along a portion of the major axis of the ellipse.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: January 3, 1978
    Assignee: Stanford Research Institute
    Inventors: Jon C. Taenzer, Steven H. Johnson
  • Patent number: 4061415
    Abstract: There are disclosed radiation deflection method and means for controlling the direction of travel of radiation which is subject to refraction, such as light and sound radiation. The deflection method and means, which are particularly adapted for effecting a scanning motion of the radiation in one direction, include first and second generally counterrotating refracting wedges through which the radiation passes. The second wedge is mounted for rotation about a fixed axis and the first wedge is mounted for rotation about an axis which nutates about the fixed axis of rotation of the second wedge. Means are provided for rotating the first and second wedges in opposite rotary directions at equal angular displacements while simultaneously nutating said first wedge.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: December 6, 1977
    Assignee: Sanford Research Institute
    Inventor: Jon C. Taenzer
  • Patent number: RE29765
    Abstract: A writing instrument is provided which generates electrical signals indicative of the force applied and the direction of motion taken by the writing instrument as one is writing with it. The writing instrument uses strain gauges for providing these signals.
    Type: Grant
    Filed: October 21, 1977
    Date of Patent: September 19, 1978
    Assignee: SRI International
    Inventors: Hewitt D. Crane, Jon C. Taenzer, Gerry B. Andeen