Jonathan D Shapiro

US Patent:

7288928, Oct 30, 2007

Filed:

Jun 27, 2005

Appl. No.:

11/168899

Inventors:

Jonathan S. Shapiro - Greenwich CT, US

Assignee:

Greenwich Instruments Co., Inc. - Greenwich CT

International Classification:

G01R 15/20

US Classification:

324117H

Abstract:

A device for measuring anode tube current or filament current in an X-ray tube, comprising a coil of wire wrapped around an insulating tube to generate a solenoidal magnetic field, one or more pieces of magnetic material and insulating material located within the tube (which magnetic elements may have their electrical potential stabilized by a resistive voltage divider), and a Hall Effect current sensor (HECS) located at the far end of the tube and insulated from the magnetic material. The output of the Hall Effects sensor is connected to an amplifier circuit, and a secondary coil of wire is used to capture the high frequency component of the magnetic signal. The secondary coil is connected to a current amplifier circuit which is followed by a high pass filter to only provide components above the cross over frequency of the hall sensor. The two signals are combined with an amplifier to provide a broad band signal that may be viewed by a current amplifier.

US Patent:

40977935, Jun 27, 1978

Filed:

Oct 22, 1976

Appl. No.:

5/734948

Inventors:

Jonathan S. Shapiro - Greenwich CT
Vincent Berluti - West Haven CT
Anthony Pellegrino - Brewster NY
Howard G. Wagner - Stamford CT

Assignee:

The Machlett Laboratories, Inc. - Stamford CT

International Classification:

G01R 31024

US Classification:

324 20R

Abstract:

An X-ray tube test system comprising signal processing circuitry including means for converting an analog signal representative of anode current into a train of pulses having an instantaneous frequency proportional to corresponding instantaneous amplitude values of the analog signal, means for counting the pulses in the train during an exposure time interval to obtain an integrated milliampere-second (MAS) value, means for summing a train of pulses having a uniform frequency during an interval of time equivalent to the exposure time interval to obtain an integral value for the exposure time, means for optionally dividing the MAS value by the exposure time value to obtain an average anode current (MA) value during the exposure time interval, and means for displaying numerical equivalents of the values thus obtained.

US Patent:

41374606, Jan 30, 1979

Filed:

Jun 17, 1976

Appl. No.:

5/696977

Inventors:

Thomas W. Fitzsimmons - Bethel CT
Vincent Berluti - West Haven CT
Howard G. Wagner - Stamford CT
Jonathan S. Shapiro - Greenwich CT

Assignee:

The Machlett Laboratories, Inc. - Stamford CT

International Classification:

G21F 504
G21K 104

US Classification:

250511

Abstract:

A radiographic system comprising an X-ray source disposed to direct an X-ray beam through an adjustable shutter aperture in an aligned collimator and onto an image receptor in a holder located at a preselected distance from the source; and automatic means for preventing an X-ray exposure until prescribed operating conditions have been satisfied, the automatic means including a readily interchangeable read-only-memory module for storing the prescribed conditions therein and ascertaining whether or not the prescribed conditions have been met.

US Patent:

42257875, Sep 30, 1980

Filed:

Nov 2, 1977

Appl. No.:

5/847877

Inventors:

Jonathan S. Shapiro - Greenwich CT
William P. Holland - West Redding CT

Assignee:

The Machlett Laboratories, Inc. - Stamford CT

International Classification:

H05G 110

US Classification:

250406

Abstract:

A control system for rotating anode x-ray tubes comprising an x-ray tube including an anode rotated by a motor having mounted therein photoelectric means for sensing rotational movement of the anode, and circuit means electrically connected to the tube, the photoelectric means, and the motor for regulating operation of the tube and rotational speed of the motor in accordance with parameters selected for operation of the tube.

US Patent:

45787670, Mar 25, 1986

Filed:

Oct 2, 1981

Appl. No.:

6/307811

Inventors:

Jonathan S. Shapiro - Cos Cob CT

Assignee:

Raytheon Company - Lexington MA

International Classification:

G06F 1520
H05G 126

US Classification:

364550

Abstract:

An X-ray system tester for measuring a set of electrical signals comprising anode voltage, cathode voltage, anode current, filament current and line voltage produced by an X-ray system during the operation of such system. A selector is provided, which couples one of the electrical signals of the sets thereof produced or one of a plurality of processing control signals entered by an operator from a control panel, to a digitizing section, selectively in accordance with control signals provided to the selector by a computing section. The digitizing section converts the selected signal whether produced by the X-ray system or entered from the control panel, into a train of pulses having a frequency proportional to the value of the selected signal. The pulses in the pulse train are counted by a counter. The number of counts being used by the computing section to determine the frequency, and hence, the value of the selected signal.

US Patent:

39639312, Jun 15, 1976

Filed:

Apr 10, 1975

Appl. No.:

5/566890

Inventors:

Jonathan Salem Shapiro - Greenwich CT

Assignee:

The Machlett Laboratories, Incorporated - Stamford CT

International Classification:

G01R 3100
G02B 2700
H05G 130

US Classification:

250416R

Abstract:

X-Ray tube monitoring apparatus comprising a shockproof housing having insulatingly disposed therein for electrical connection between the anode of an X-ray tube and a high voltage source a current sensing means which is operatively connected to opto-electronic means for transmitting a linearized light output signal corresponding to an anode current passing through the sensing means safely out of the shockproof housing to a relatively low voltage amplifying and display means.

US Patent:

43161294, Feb 16, 1982

Filed:

Apr 17, 1980

Appl. No.:

6/141086

Inventors:

Jonathan S. Shapiro - Greenwich CT
William P. Holland - West Redding CT

Assignee:

The Machlett Laboratories, Incorporated - Stamford CT

International Classification:

H02P 516

US Classification:

318313

Abstract:

A control system for rotating anode x-ray tubes comprising an x-ray tube including an anode rotated by a motor having mounted therein photoelectric means for sensing rotational movement of the anode, and circuit means electrically connected to the tube, the photoelectric means, and the motor for regulating operation of the tube and rotational speed of the motor in accordance with parameters selected for operation of the tube.

US Patent:

40187160, Apr 19, 1977

Filed:

Jun 16, 1975

Appl. No.:

5/587447

Inventors:

Thomas W. Fitzsimmons - Bethel CT
Vincent Berluti - West Haven CT
Howard G. Wagner - Stamford CT
Jonathan S. Shapiro - Greenwich CT

Assignee:

The Machlett Laboratories, Incorporated - Stamford CT

International Classification:

G21F 504
G21K 104

US Classification:

250511

Abstract:

A radiographic system comprising an X-ray source disposed to direct an X-ray beam through an adjustable shutter aperture in an aligned collimator and onto an image receptor in a holder located at a preselected distance from the source; and automatic means for preventing an X-ray exposure until prescribed operating conditions have been satisfied, the automatic means including read-only-memory means for storing the prescribed conditions therein and ascertaining whether or not the prescribed conditions have been met.