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Ekhard T Preikschat

from Redmond, WA
Age ~82
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Also known as:
Ekhard F Preikschat, Ekkehard Preikschat, Preikschat Dr Ekkehard, Ekkehard Romera
Phone and address:
22907 126Th St, Redmond, WA 98053
(425) 522-4464
Related to:
Ricardo Martinez, 56Amanda K Blaising, 41Ricardo Medina, 47
Connected to:
Amber R Preimesberger, 32Carol M Preimesberger, 75Christopher C Preimesberger, 44Joseph M Preimesberger, 64Neal J Preimesberger, 73Frank Prein, 62Travis G Preiner, 46Alice F Preis, 84Christopher Preis, 58Clare M Preis, 65

Ekhard Preikschat Phones & Addresses

  • 22907 126Th St, Redmond, WA 98053 (425) 522-4464
  • 24571 NE Vine Maple Way, Redmond, WA 98053 (425) 522-4464
  • 9048 41St St, Bellevue, WA 98004 (425) 454-2760 (425) 454-6379
  • Yarrow Point, WA
  • Kiona, WA

Work

Company: Seattle score Position: Consultant

Resumes

Resumes

Ekhard Preikschat Photo 1

Consultant

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Location:
Redmond, WA
Work:
Seattle Score
Consultant

Business Records

Name / Title
Company / Classification
Phones & Addresses
Ekhard Preikschat
President,Chairman
APPA SYSTEMS, INCORPORATED

Publications

Us Patents

Apparatus And Method For Particle Analysis

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US Patent:
48712515, Oct 3, 1989
Filed:
Nov 12, 1987
Appl. No.:
7/119797
Inventors:
Fritz K. Preikschat - Bellevue WA
Ekhard Preikschat - Bellevue WA
International Classification:
G01N 1502
US Classification:
356336
Abstract:
Apparatus for analyzing particles contained in a fluent edium (12). The apparatus includes a body (20) having a window (30), an optical source preferably comprising a laser diode (100) having a small light emitting area (140), and an optical system (102) for focusing the light from the laser diode at a focal spot (84) such that the size of the focal spot is approximately equal to the size of the light emitting area of the laser diode. A photodetector (106) is mounted in the body and detects light backscattered from the focal spot by particles in the fluent medium, and produces an electrical signal that comprises a series of pulses associated with the particles. The electrical signal is input to a detector that counts the pulses and indicates the number of particles in the fluent medium. The detector includes discrimination means for preventing the counting of a pulse that has a rise or fall time above a predetermined threshold, thereby discriminating against particles that are not at the focal spot. Means are provided for measuring the integrated amplitude of the electrical signal, and for varying the distance between the focal spot and the window to maximize such integrated amplitude.

Apparatus And Method For Particle Analysis

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US Patent:
50121189, Apr 30, 1991
Filed:
Dec 13, 1989
Appl. No.:
7/450603
Inventors:
Fritz K. Preikschat - Bellevue WA
Ekhard Preikschat - Bellevue WA
International Classification:
G01N 1506
US Classification:
250574
Abstract:
Apparatus and method of analyzing particles contained in a fluent medium. An optical system receives light from a laser, and focuses the light at a focal spot in the fluent medium. Optical pulses resulting from the backscattering of light by particles in the focal spot are detected and used to produce an electrical transit time signal comprising a series of electrical pulses. The length of each electrical pulse corresponds to the time required for a particle to pass through the focal spot. The apparatus also includes a laser Doppler system that receives light from the focal spot region, and produces an electrical velocity signal corresponding to the velocity of particles within such region. A processor receives the transit time and velocity signals, and combines the signals to produce data representing the sizes of particles passing through the focal spot.

Leverage Insertion Assembly

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US Patent:
56273304, May 6, 1997
Filed:
Mar 29, 1996
Appl. No.:
8/624982
Inventors:
Ekhard Preikschat - Bellevue WA
Robert J. Hilker - Bothell WA
Assignee:
Appa Systems, Inc. - Bellevue WA
International Classification:
G01N 1114
US Classification:
738665
Abstract:
A leverage insertion assembly for inserting and removing an element from a main pipeline in which a fluid is flowing. The leverage device includes a hollow positioning pipe connected to the main pipeline with a gate valve attached to the positioning pipe. Formed on the outer surface of the section of positioning pipe on the opposite side of the gate valve from the main pipeline is a spiral cut-out. Handles attached at one end to the element located inside the positioning pipe extend through the spiral cut-out. During operation, the element is moved longitudinally inside the positioning pipe when the element is rotated by turning the handles. As the handles are turned, the cut-out limits the longitudinal movement of the element inside the positioning pipe. When the element has been moved a sufficient distance inside the positioning pipe to clear gate valve, the gate valve may be closed thereby closing the positioning pipe. The element can then be removed from the positioning pipe.

Radar System For Multiple Object Tracking And Discrimination

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US Patent:
47680342, Aug 30, 1988
Filed:
Mar 26, 1984
Appl. No.:
6/593555
Inventors:
Fritz K. Preikschat - Bellevue WA
Ekhard Preikschat - Bellevue WA
International Classification:
G01S 1300
G01S 502
US Classification:
342 80
Abstract:
A radar system for tracking a plurality of individual objects that form a cluster. The system comprises means for producing in real time reference information indicative of the position of a reference point associated with the mean position of the objects, and means for producing in real time displacement information indicative of the relative position of each object with respect to the reference point. The system may handle a transmitter, and the means for producing the displacement information may include a interferometer system comprising a central receiver, a pair of first satellite receivers positioned on opposite sides of the central receiver along a first axis that passes through the central receiver, and a pair of second satellite receivers positioned on opposite sides of the central receiver along a second axis that passes through the central receiver and that is inclined with respect to the first axis. The displacement information produced by the interferometer system indicates the position of each object with respect to a virtual coordinate system having one axis coincident with a line from the central receiver to the reference point. Means are described for determining the relative phases and relative arrival times of radar pulses reflected from the objects at each of the recivers.

Rotating Consistency Transmitter Impeller And Method

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US Patent:
56842473, Nov 4, 1997
Filed:
Jun 19, 1996
Appl. No.:
8/666903
Inventors:
Ekhard Preikschat - Bellevue WA
Assignee:
APPA System, Inc. - Bellevue WA
International Classification:
G01N 1114
US Classification:
73 5432
Abstract:
An improved impeller for a rotating consistency transmitter and a method of measuring the consistency of pulp slurry flowing in a main pipeline. The impeller includes an intercepting surface designed to minimize the creation of turbulence in pulp slurry and the frictional forces on the front edge thereof when rotated in the pulp slurry. Using the impeller, a method of measuring the consistency of the pulp slurry is provided which measures the work done by forces acting on the impeller.

Optical Radar System

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US Patent:
48180998, Apr 4, 1989
Filed:
Oct 25, 1985
Appl. No.:
6/791580
Inventors:
Fritz K. Preikschat - Bellevue WA
Ekhard Preikschat - Bellevue WA
International Classification:
G01C 308
US Classification:
356 5
Abstract:
An optical radar system comprising a transmitter (20), a receiver (22), a signal processor (200) and means (202, 206) for conveying a return signal from the receiver to the signal processor. The transmitter comprises a laser diode (50), an avalanche transistor (52), a capacitor (56) and a trigger generator (58). The laser diode, avalanche transistor and capacitor are arranged so as to minimize the combined effects of self-inductance and stray capacitance, thereby enhancing the speed and power of the optical pulses. The receiver comprises a reverse biased photodiode capacitively coupled to a dual gate GaAsFET. The transmitter and reciever are connected to the signal processor via coaxial cable (206) and cable amplifiers (202). The cable amplifiers are selected to compensate for the high frequency attenuation of the coaxial cable, such that the combined cable/cable amplifier transmission system has an essentially flat frequency response up to 1000 MHz.

Rotating Consistency Transmitter And Method

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US Patent:
56000588, Feb 4, 1997
Filed:
Sep 8, 1995
Appl. No.:
8/525945
Inventors:
Ekhard Preikschat - Bellevue WA
Robert J. Hilker - Bothell WA
Assignee:
APPA Systems, Inc. - Bellevue WA
International Classification:
G01N 1114
US Classification:
73 5432
Abstract:
A rotating consistency transmitter and method of measuring the viscosity, consistency, concentration or the rheological properties of a flowing multi-purpose material in a pipeline by measuring the torque acting on a rotating shaft, which at one end is driven by a motor and at the other end is attached to an impeller directly positioned inside the pipeline. The rotating shaft is made up of three concentric shafts, an outer drive shaft, a middle sensor shaft and an inner reference shaft aligned and attached together so that a single motor may be used to rotate it. The sensor shaft is connected at one end to the drive shaft and connected at the opposite end to the inner reference shaft. When material is present in the main pipeline and in contact with the impeller, rotation of the impeller is impeded, thereby producing a torque across the sensor shaft. This torque causes a twisting action on the sensor shaft which may be determined by measuring the angular displacement between the outer drive shaft and the inner reference shaft.

System For Acquiring An Image Of A Multi-Phase Fluid By Measuring Backscattered Light

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US Patent:
56190433, Apr 8, 1997
Filed:
Sep 21, 1994
Appl. No.:
8/310630
Inventors:
Ekhard Preikschat - Bellevue WA
Jon V. Hokanson - Redmond WA
Barry W. Reed - Auburn WA
Assignee:
Laser Sensor Technology, Inc. - Redmond WA
International Classification:
G01N 2149
US Classification:
250574
Abstract:
The present invention describes an optical technique for analyzing undiluted, multi-phase fluid flows as typically encountered inside reactor vessels or flow lines in the chemical industries. In particular the technique uses a pulsed, coherent light source and measures the back-scattered light collected over a wide scattering angle. A light beam is relayed via a set of lenses down a long probe tube, through a window at a probe tip to illuminate the material that is passing past the window. The light beam is pulsed to "freeze" the motion of the particles streaming past the window. The backscattered light is collected by the same set of optics and is focused on the front surface of a CCD chip. The lens closest to the front window has a short focal length with a large numerical aperture to collect the back-scattered light over a wide range of backward angles, thereby increasing the detection sensitivity to larger particles, which lie behind and are partially obscured by the myriad of smaller particles closest to the window. The probe tube is inserted through an insertion assembly so that the front viewing window is in direct contact with the material flow, and can be positioned so that the flow will provide a continuous and representative stream of material past the window.
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Ekhard T Preikschat from Redmond, WA, age ~82 Get Report