Patents Represented by Attorney L. P. Johns

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  • Faraday current sensor with fiber optic compensated by temperature, degradation, and linearity
    Patent number: 4613811
    Abstract: A magneto-optical current sensor for measuring current flowing through a conductor, characterized by at least two components. One component is parallel to the direction of current flow and is proximate to a source of magnetic field. The other component is perpendicular to that direction and includes a surface in contact with said one component. One of the components having a reflective surface for reflecting a polarized light beam between components whereby a light signal is produced that is compensated for temperature, loop degradation, and linearity.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: September 23, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: Eugene G. Vaerewyck, Cheng-Lin Chen, Juris A. Asars
  • Temperature stabilized Faraday rotator current sensor by thermal mechanical means
    Patent number: 4612500
    Abstract: Apparatus for measuring current in a conductor characterized by a magneto-optical current sensor employing the Faraday effect to measure current in a high voltage transmission line. Polarized light having a predetermined plane of polarization is directed into the sensor which plane of polarization is rotated by magnetic field lines generated by the current in the conductor. A bimetal coil rotates the sensor to achieve temperature stability of the current signal in the temperature range of -40.degree. C. to 140.degree. C.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: September 16, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: Cheng-lin Chen, Juris A. Asars, Eugene G. Vaerewyck
  • Magnetic sensor for armature and stator
    Patent number: 4608620
    Abstract: A magnetic sensing device for controlling power required for maintaining an armature in a closed position on a stator, characterized by a soft-iron shunt extending between and spaced from the armature and stator for conducting a magnetic field therebetween and a magnetic field sensor between the stator and the shunt for monitoring the magnetic field and for controlling power to a coil of the stator.
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: August 26, 1986
    Assignee: Westinghouse Electric Corp.
    Inventor: George Hines
  • Circuit breaker with replaceable rating plug interlock and push to trip button
    Patent number: 4603313
    Abstract: A circuit breaker characterized by a pair of separable contacts, trip means operable automatically in response to overload current conditions to open the contacts which means include a rotatable trip bar biased in an untripped position, and interlock means including a manually operable button for rotating the trip bar to a tripped position when the button is pushed and for rotating a cam into tripped and untripped positions when the button is rotated.
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: July 29, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: Alan B. Shimp, William E. Beatty, Jr.
  • Circuit breaker with adjustable trip unit
    Patent number: 4603312
    Abstract: A circuit breaker characterized by a housing and a circuit breaker structure within the housing and comprising an electromagnetic trip including a magnetic yoke and armature and means associated with the armature for adjusting the electromagnetic force required to pull the armature to the yoke, whereby changing of the force requirement results in significant reduction in operating time of the trip unit.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: July 29, 1986
    Assignee: Westinghouse Electric Corp.
    Inventor: John P. Conner
  • Clamping device for rectangular workpiece
    Patent number: 4601221
    Abstract: A clamping device for rectangular configurations characterized by two opposed jaws each having right-angled jaw portions and each pivotally mounted on separate support means for movement to and from each other so that the jaws form rectangular openings with self-adjusting aspect ratio for holding a rectangular workpiece.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: July 22, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: Ralph W. Kalkbrenner, Hans E. Leumann
  • Magnetically operated circuit breaker
    Patent number: 4598263
    Abstract: A magnetically operated circuit breaker characterized by a circuit breaker structure including first and second separable contacts operable between open and closed positions, a releasable mechanism movable when released to a tripped position to effect automatic opening of the contacts, the first contact being connected to the releasable mechanism, the second contact being movable between open and closed positions of the first contact, and electromagnetic actuating means for moving the second contact between open and closed position in response to a control signal generated remotely from the circuit breaker.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: July 1, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: Carl J. Heyne, Nicholas A. Tomasic, Jiing-Liang Wu
  • Electrical bushing having a convertible central conductor
    Patent number: 4594475
    Abstract: An electrical insulating bushing for conversion between various current ratings and characterized by a tubular column including an insulating portion, a tubular conductor extending through the column and connected to terminals at the top and bottom of the column, and another conductor disposed within the tubular conductor and connected to the terminal at the top of the column. In order to convert the bushing to a different current rating, a replacement conductor is provided which can be substituted for the conductor within the tubular conductor. The replacement conductor and tubular conductor are electrically connected together in spaced alignment near the bottom terminal by a conductive annulus and a coil spring.
    Type: Grant
    Filed: August 3, 1984
    Date of Patent: June 10, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: Dennis C. Bowman, James L. Marlowe
  • Segmented toroidal air-core transformer
    Patent number: 4581598
    Abstract: A toroidal air-core transformer characterized by substrates extending radially outwardly. Each substrate includes windings extending from one end to the other with each winding having a solder pad for connection with corresponding pads on the next adjacent segments.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: April 8, 1986
    Assignee: Westinghouse Electric Corp.
    Inventor: Theodore H. York
  • Metering system for measuring parameters of high AC electric energy flowing in an electric conductor
    Patent number: 4578639
    Abstract: Metering system for measuring parameters of high AC electric energy flowing in an electric conductor and characterized by separate current sensor means for generating separate polarized light outputs representative of voltage end current passing through a conductor, separate electronic means for receiving and transforming the voltage and current outputs into power, voltage, and current signals.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: March 25, 1986
    Assignee: Westinghouse Electric Corp.
    Inventor: Robert C. Miller
  • Drawout switchgear apparatus with retractable shutter mechanism for terminal stabs
    Patent number: 4565908
    Abstract: Drawout switchgear apparatus characterized by a cell having a plurality of spaced fixed terminal stabs therein, an insulating shutter structure extending across the terminal stabs, a switchgear unit removably disposed in the cell and including terminal means for detachably engaging with the terminal stabs during movement into and out of the cell, obstruction means retractably mounted for preventing movement of the shutter when the switchgear unit is removed from the cell, and trigger means on the unit for retracting the obstruction means when the unit moves into the cell for exposing the stabs to the terminal means of the unit.
    Type: Grant
    Filed: December 12, 1984
    Date of Patent: January 21, 1986
    Assignee: Westinghouse Electric Corp.
    Inventor: Fred Bould
  • Secondary circuit breaker for distribution transformer with indicator light switch mechanism
    Patent number: 4554524
    Abstract: A secondary circuit breaker for a distribution transformer characterized by electrical inductive apparatus within an oil-filled housing, and circuit interrupter for controlling current flow through said apparatus and comprising a releasable latch arm, trip means operable upon overload conditions to release the latch arm, a latch lever between the trip means and the latch arm, and a signal light circuit for activating a signal light when current through the circuit breaker exceeds a low signal overload value. That is less than the trip value.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: November 19, 1985
    Assignee: Westinghouse Electric Corp.
    Inventor: Raymond J. Radus
  • Fuse with electro-negative gas interrupting means
    Patent number: 4544908
    Abstract: There is provided by this invention a current limiting fuse having a fuse element wound about support means consisting of a non-stoichiometric oxide core that produces an electro-negative gas when heated by the melting fuse element. The generation of the electro-negative gas results in more rapid and efficient arc extinction.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: October 1, 1985
    Assignee: Westinghouse Electric Corp.
    Inventors: Donald D. Blewitt, Tapan K. Gupta
  • Liquid level indicator for a tilted container
    Patent number: 4543730
    Abstract: A liquid level indicator for use in a tubular container having a central obstruction with clearance space between the obstruction and the container, the indicator characterized by an elongated float arm having opposite ends located on opposite sides of the obstruction with a liquid float on each end so as to move up and down with corresponding movement of a liquid level within the tank, the float arm being connected to a gear box for actuating an indicator on the outside of the container.
    Type: Grant
    Filed: February 9, 1984
    Date of Patent: October 1, 1985
    Assignee: Westinghouse Electric Corp.
    Inventor: Julian C. Scott
  • Pushbutton interlock
    Patent number: 4539860
    Abstract: A unique interlock mechanism for two pushbuttons or other linearly operated devices, requiring no mechanical linkages or complex assemblies. The interlock mechanism essentially comprises an interlock member having first and second restraining portions disposed within a housing so that when one of the pushbuttons is operated, the interlock member rotates positioning itself under the second pushbutton, interfering with and making it impossible to be operated.
    Type: Grant
    Filed: August 26, 1983
    Date of Patent: September 10, 1985
    Assignee: Westinghouse Electric Corp.
    Inventors: Robert J. Johnston, Stephen G. Layciak, Dominic Colista
  • Monolithic fuse for rotating equipment
    Patent number: 4533893
    Abstract: There is provided a current limiting fuse having a uniform and supported element with arc voltage controlling and shaping capabilities that can withstand high mechanical and electrical stress.
    Type: Grant
    Filed: January 13, 1984
    Date of Patent: August 6, 1985
    Assignee: Westinghouse Electric Corp.
    Inventors: Donald D. Blewitt, Tapan K. Gupta
  • High voltage fuse with controlled arc voltage
    Patent number: 4528536
    Abstract: There is provided a current limiting fuse having an electrically parallel connected non-linear resistor element for limiting and shaping the arc voltage developed during current interruption.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: July 9, 1985
    Assignee: Westinghouse Electric Corp.
    Inventors: Donald D. Blewitt, Theodore Vojnovich
  • Operating mechanism for a control device
    Patent number: 4520687
    Abstract: An operating mechanism for actuating a control device within a tank housing characterized by a boss extending through an aperture in the tank wall and having a bore, an operating shaft rotatably mounted within the bore and having an external handle and an internal crank portion, link means for connecting the crank portion to the control device, the bore being tapered with one end being larger than the other end, a shaft bearing within the larger end of the bore for supporting the shaft, a seal disposed within the bearing, and retainer means disposed within the bore for retaining the bearing and seal in place.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: June 4, 1985
    Assignee: Westinghouse Electric Corp.
    Inventor: Gregory J. Golub
  • Boric acid expulsion fuse
    Patent number: 4520337
    Abstract: A high voltage circuit interrupter characterized by a tubular insulating casing that encloses a tube of boric acid forming an elongated bore. The bore includes bore portions of smaller and larger diameter. An elongated conductor is disposed in the bore and forms a clearance space therewith. Fusible means extend between the enlarged conductor and a fuse terminal. Upon fusion of the fusible means the larger end portion of the conductor is retracted into the smaller bore portion while maintaining a clearance space therewith, so that a minimal clearance space between the smaller bore portion and the enlarged end portion of the conductor provides adequately high water vapor pressure to extinguish an electric arc generated by fusion of the fusible means.
    Type: Grant
    Filed: July 23, 1984
    Date of Patent: May 28, 1985
    Assignee: Westinghouse Electric Corp.
    Inventor: Frank L. Cameron
  • Meter encoding register with tapered aperture in baffle insert
    Patent number: 4511798
    Abstract: A multiple shaft meter including register characterized by an electrical signal generating system including illuminating source and a plurality of encoding photocells. A light baffle plate is disposed between the illumination source in the photocells and is provided with apertures aligned with respective photocells, and the apertures being tapered to minimize stray light effects.
    Type: Grant
    Filed: February 23, 1983
    Date of Patent: April 16, 1985
    Assignee: Westinghouse Electric Corp.
    Inventor: Emmett D. Killingsworth