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Ruth Shefer

from Cambridge, MA
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Connected to:
Amit Shefer, 56Amy J Sheff, 48Carol A Sheff, 76Christine M Sheff, 59Emily T Sheff, 33Joan J Sheff, 90Knykole S Sheff, 58Milo K Sheff, 46Richard M Sheff, 81Ronnie D Sheff, 68

Ruth Shefer Phones & Addresses

  • Cambridge, MA

Work

Company: Newton scientific, inc. Position: President

Education

Degree: Ph.D. School / High School: Massachusetts Institute of Technology Specialities: Physics

Industries

Electrical/Electronic Manufacturing

Resumes

Resumes

Ruth Shefer Photo 1

President

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Location:
5 Monument Sq, Charlestown, MA 02129
Industry:
Electrical/Electronic Manufacturing
Work:
Newton Scientific, Inc.
President
Education:
Massachusetts Institute of Technology
Ph.D., Physics

Business Records

Name / Title
Company / Classification
Phones & Addresses
Ruth Shefer
President
Newton Scientific, Inc.
Electrical/Electronic Manufacturing · Commercial Nonphysical Research · Glass Prod Mfg Made of Purchased Glass
255 Bent St, Cambridge, MA 02141
245 Bent St, Cambridge, MA 02141
(617) 354-9469, (617) 679-9800

Publications

Us Patents

Method And Apparatus For Ion Beam Generation

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US Patent:
6414327, Jul 2, 2002
Filed:
Sep 14, 1999
Appl. No.:
09/395580
Inventors:
Robert E. Klinkowstein - Winchester MA
Ruth Shefer - Newton MA
Barbara J. Hughey - Lexington MA
Assignee:
Newton Scientific, Inc. - Cambridge MA
International Classification:
H01J 3730
US Classification:
25049221, 250423 R
Abstract:
A method and apparatus for ion beam generation in which acceleration of an ion beam in a first accelerating tube to a high voltage terminal, followed by transport of the beam through the terminal without significant charge changing, and deceleration of the beam substantially to ground potential in a second accelerating tube. Since the terminal is maintained at high voltage, the beam optical characteristics between the ion source and the terminal are identical to those of normal tandem operation. The optical elements of the injector and accelerator beamline can therefore be adjusted to produce an focused beam envelope in the high voltage terminal, allowing the beam to propagate efficiently through an empty stripper canal. Since the beam, does not undergo a charge change in the terminal, it is decelerated in the second tandem accelerating tube. Since the beam propagates through the accelerator at energies higher than the injection energy, expansion of the beam due to space charge and emittance is reduced.

Sample Introduction Interface For Analytical Processing Of A Sample Placed On A Substrate

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US Patent:
6707035, Mar 16, 2004
Filed:
Aug 23, 2001
Appl. No.:
09/935909
Inventors:
Barbara J. Hughey - Lexington MA
Paul L. Skipper - Belmont MA
John S. Wishnok - Brookline MA
Ruth E. Shefer - Newton MA
John T. Mehl - South Boston MA
Steven R. Tannenbaum - Framingham MA
Assignee:
Newton Scientific, Inc. - Cambridge MA
Massachusetts Institute of Technology - Cambridge MA
International Classification:
H01J 4926
US Classification:
250288, 250423 R, 250282, 250281, 250423 P, 73 231
Abstract:
An interface system for introducing a non-gaseous sample as a predetermined gaseous form into an analytical instrument which comprises a substrate that receives the non-gaseous sample and a directed energy source that heats at least a portion of said substrate containing the non-gaseous sample to convert the sample to the predetermined gaseous form.

Sample Introduction Interface For Analytical Processing

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US Patent:
6867415, Mar 15, 2005
Filed:
Aug 23, 2001
Appl. No.:
09/938277
Inventors:
Barbara J. Hughey - Lexington MA, US
Paul L. Skipper - Belmont MA, US
John S. Wishnok - Boston MA, US
Ruth E. Shefer - Newton MA, US
Naomi A. Fried - Oakland CA, US
John T. Mehl - Westfield NJ, US
Steven R. Tannenbaum - Framingham MA, US
Assignee:
Newton Scientific, Inc. - Cambridge MA
Massachusetts Institute of Technology - Cambridge MA
International Classification:
H01J049/26
US Classification:
250288, 250288 A, 250282, 250423 R, 73 231
Abstract:
An interface for introducing a non-gaseous sample as a predetermined gaseous form into an accelerator mass spectrometer which comprises a nebulizer that receives the non-gaseous sample to provide a fine spray of the sample, a converter that receives at least a portion of said fine spray and converts the desired elements to the predetermined gaseous form and a flow line that transports the predetermined gaseous form to the accelerator mass spectrometer.

X-Ray Detector For Feedback Stabilization Of An X-Ray Tube

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US Patent:
7177392, Feb 13, 2007
Filed:
Sep 10, 2003
Appl. No.:
10/659065
Inventors:
Ruth E. Shefer - Newton MA, US
Robert E. Klinkowstein - Winchester MA, US
Earl S. Marmar - Newton MA, US
Assignee:
Newton Scientific, Inc. - Cambridge MA
International Classification:
H05G 1/44
US Classification:
378108, 378207
Abstract:
An x-ray tube emits X-rays in response to a current control signal. An X-ray detector detects the emitted X-rays and provides a detected X-ray signal indicative thereof to a control system, which provides the current control signal. The X-ray detector provides feedback stabilization of the X-ray output from a source of X-rays, such as, for example an X-ray tube. The detector produces an electrical signal proportional to the X-ray output of the X-ray tube, and that signal is used to control the electron beam current in the tube in order to stabilize the X-ray output of the tube at a predetermined value.

Integrated X-Ray Source Module

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US Patent:
7448801, Nov 11, 2008
Filed:
Feb 20, 2003
Appl. No.:
10/370783
Inventors:
Peter E. Oettinger - Acton MA, US
Francis M. Feda - Sudbury MA, US
Ruth E. Shefer - Newton MA, US
Robert E. Klinkowstein - Winchester MA, US
Assignee:
INPHO, Inc. - Sudbury MA
Newton Scientific Inc. - Cambridge MA
International Classification:
H01J 35/16
H05G 1/10
US Classification:
378203, 378102
Abstract:
Described is a self-contained, small, lightweight, power-efficient and radiation-shielded module that includes a miniature vacuum X-ray tube emitting X-rays of a controlled intensity and defined spectrum. Feedback control circuits are used to monitor and maintain the beam current and voltage. The X-ray tube, high-voltage power supply, and the resonant converter are encapsulated in a solid high-voltage insulating material. The module can be configured into complex geometries and can be powered by commercially available small, compact, low-voltage batteries.

Integrated X-Ray Source Module

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US Patent:
7448802, Nov 11, 2008
Filed:
Jan 22, 2004
Appl. No.:
10/763051
Inventors:
Peter E. Oettinger - Acton MA, US
Frank M. Feda - Sudbury MA, US
Ruth E. Shefer - Newton MA, US
Robert E. Klinkowstein - Winchester MA, US
Assignee:
Newton Scientific, Inc. - Cambridge MA
INPHO, Inc. - Sudbury MA
International Classification:
H01J 35/16
H05G 1/10
US Classification:
378203, 378102
Abstract:
Described is a self-contained, small, lightweight, power-efficient and radiation-shielded module that includes a miniature vacuum X-ray tube emitting X-rays of a controlled intensity and defined spectrum. Feedback control circuits are used to monitor and maintain the beam current and voltage. The X-ray tube, high-voltage power supply, and the resonant converter are encapsulated in a solid high-voltage insulating material. The module can be configured into complex geometries and can be powered by commercially available small, compact, low-voltage batteries.

Compact High Voltage X-Ray Source System And Method For X-Ray Inspection Applications

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US Patent:
7949099, May 24, 2011
Filed:
Jul 3, 2008
Appl. No.:
12/167722
Inventors:
Robert E. Klinkowstein - Winchester MA, US
Ruth E. Shefer - Newton MA, US
Assignee:
Newton Scientific Inc. - Cambridge MA
International Classification:
H01J 35/18
H01J 35/00
US Classification:
378121, 378140
Abstract:
An x-ray system is disclosed that includes a bipolar x-ray tube. The bipolar x-ray tube includes two insulators that are separated by an intermediate electrode in an embodiment, wherein each insulator forms a portion of an outer wall of a vacuum envelope of the bipolar x-ray tube surrounding at least a portion of a path of an electron beam within the vacuum envelope. In further embodiments, the bipolar x-ray tube includes a first electrode at a positive high voltage potential with respect to a reference potential, a second electrode at a negative high voltage potential with respect to the reference potential, and an x-ray transmissive window that is at the positive high voltage potential.

Method And Apparatus For Non-Invasive Measurements Of Selected Body Elements

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US Patent:
52730441, Dec 28, 1993
Filed:
Apr 12, 1991
Appl. No.:
7/684393
Inventors:
Allen M. Flusberg - Newton MA
Ruth Shefer - Newton MA
Robert Klinkowstein - Winchester MA
Mordechai Rokni - Mevaseret Zion, IL
Assignee:
Science Research Laboratory, Inc. - Somerville MA
International Classification:
A61B 500
G01N 2306
US Classification:
128659
Abstract:
A method and apparatus are provided for performing non-invasive measurements, and in particular in vivo non-invasive measurements of the total body content of a particular element, or of the content of such elemetn in a particular body area, by use of resonant gamma ray detection. More particularly, gamma rays are generated at the resonant gamma absorption energy level for the element on which measurements are to be made and are passed through the portion of the patient's body for which measurements are to be made. Detected gamma rays passing through the patient's body may be utilized as an indication of the content of such element. The effect of non resonant gamma absorption may be subtracted by also passing gamma rays of non-resonant absorption energy through the same body part and utilizing detected gamma rays at this energy passing through the body to determine the non-resonant absorptions.
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Ruth Shefer from Cambridge, MA Get Report