Inductive Impedance Patents (Class 315/62)
  • Patent number: 9837825
    Abstract: A transmitter for transmitting wireless power and a wireless power transmitting system having the same in the present invention includes at least one helical or spiral type coil in which one end thereof is in a grounded state and the other end is in the air, wherein the coil wirelessly transmits the power by resonance. The present invention has simpler structure and operates with low frequencies as compared with the existing wireless power transmitting scheme using magnetic resonance, thereby to enhance the efficiency of the power transfer, to reduce the cost for system building, and to easily implement a transmitting section with the multi-channel.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: December 5, 2017
    Assignee: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventors: Chin-Wook Chung, Jin-Young Bang
  • Patent number: 9482072
    Abstract: A method of activating a tool can include displacing a device in the tool, the device transmitting energy to a receiver of the tool, thereby activating the tool, and the transmitting including a control circuitry increasing electrical current flow between an electrical power source and a transmitter in response to a sensor detecting a predetermined stimulus downhole. A system can include a tool including a receiver and an electrical load, and a device which displaces relative to the tool, the device including a transmitter, a sensor and an electrical power source. Another method can include displacing a device in a tubular string including multiple downhole tools, each including a receiver and an electrical load, and the device including a transmitter and a sensor. The transmitter transmits energy to at least one of the receivers in response to sensor detection of a predetermined number of the tools traversed by the device.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: November 1, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael L. Fripp, Zachary W. Walton, Zachary R. Murphree, Donald G. Kyle
  • Patent number: 9236174
    Abstract: A magnetic field distribution control apparatus includes a rod portion, a coil disposed at one side of an upper surface of the rod portion, and a ferrite movably disposed within the coil and configured to produce a magnetic field.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: January 12, 2016
    Assignee: HYUNDAI MOTOR COMPANY
    Inventor: Heejin Lee
  • Publication number: 20140320010
    Abstract: A spark plug for an internal combustion engine, including: a center electrode having a first noble metal pin of a first diameter mounted thereon, and a ground electrode having a second noble metal pin of a second diameter mounted thereon, the noble metal pins of the center electrode and of the ground electrode being mutually opposed at the end faces thereof; and the first diameter of the first noble metal pin of the center electrode being larger than the second diameter of the second noble metal pin of the ground electrode.
    Type: Application
    Filed: August 3, 2012
    Publication date: October 30, 2014
    Inventors: Detlef Hartmann, Dietrich Trachte
  • Patent number: 8698413
    Abstract: An induction RF fluorescent lamp configuration provides reduced EMI, including a lamp envelope with a re-entrant cavity both covered on the partial vacuum side with phosphor and filled with a working gas mixture, a tubular ferromagnetic core on the non-vacuum side said re-entrant cavity wound directly on the said core with two windings having different numbers of turns, a first active winding having one end connected to an RF ballast and the other end connected to local ground, and a second passive winding having one end grounded and the other end free.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: April 15, 2014
    Assignee: Lucidity Lights, Inc.
    Inventors: Valery A. Godyak, Jakob Maya, James N. Lester
  • Patent number: 8198792
    Abstract: The electrodeless discharge lamp comprises: a bulb provided with a substantially-spherical spherical portion and a neck portion extending from the spherical portion; a base connected to the neck portion; a protrusion formed at an apex of the spherical portion; and an induction coil that causes light emission by discharge developed in the bulb. The electrodeless discharge lamp satisfies the formula below: t?6?10959×X+25?t+6??(Formula) where X=(B×S)/(L×A), B=W/(4×?×(D/20)2), S=?×(d/20)2, L=?×(d/10), W (W) denotes the lamp input power, D (mm) denotes the diameter of the spherical portion, d (mm) denotes the diameter of a portion at a joint surface between the neck portion and the base, and A (mm) denotes the distance from a largest-diameter portion of the spherical portion to the joint surface, and t is the temperature (° C.) at the tip of the protrusion during downward stable lighting of the electrodeless discharge lamp.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: June 12, 2012
    Assignee: Panasonic Corporation
    Inventors: Yoshinori Tsuzuki, Kazuhiko Sakai, Kohji Hiramatsu, Atsunori Okada
  • Publication number: 20110148300
    Abstract: A high-voltage pulse generator based on a spiral pulse generator, wherein the spiral pulse generator is implemented as an LTCC component and is wound from at least two ceramic and at least two metal-containing layers, and the high-voltage pulse generator can be introduced into a cylindrical volume V=d2*?*3*d whose length is three times as long as the diameter of the volume, and the volume of the high-voltage pulse generator is greater than one-third of the cylindrical volume. Also disclosed is a high-pressure discharge lamp having a tubular outer piston, wherein the outer piston of the high-pressure discharge lamp has an aforesaid high-voltage pulse generator.
    Type: Application
    Filed: July 16, 2009
    Publication date: June 23, 2011
    Inventors: Andreas Kloss, Steffen Walter
  • Patent number: 7872421
    Abstract: The present invention relates to a device for fluorescent tube armatures, the device being intended to replace a previously occurring fluorescent tube. The device has a light emitting diode unit (4) comprising at least one electrical drive unit (4.1), which is connected to at least one phase wire, as well as is connected to at least one neutral wire via at least one wire (4.2) comprising at least one light-emitting diode (4.3).
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: January 18, 2011
    Assignee: Patica AB
    Inventor: Tage Dungskog
  • Patent number: 7857498
    Abstract: An electronic-ballast lamp system comprises a modular lamp ballast in a plug-in housing. A light fixture has matching sockets for the ballast and is pre-wired for the intended lamp tubes. In one instance, an electronic ballast accepts 100-300 VAC and 50-60 Hz power inputs, and provides the correct rapid-start, instant-on, or standard lamp outputs as sensed from the lamps themselves, or as read from a data card embedded in the light fixture. The data card is read optically or electronically, depending on application, or the lamp types may be dialed-in on the ballast itself.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: December 28, 2010
    Inventor: Toby Smith
  • Patent number: 7772753
    Abstract: In an electrodeless lamp, at least one core assembly is coupled to a tubular lamp envelope. The core assembly includes a lamp envelope protector disposed over an outer surface of the lamp envelope, and a core member surrounding the lamp envelope at a core mounting location such that lamp envelope protector is disposed between the core member and the lamp envelope. The core assembly further includes a coil bobbin coupled to the core member, and a coil wounded around the coil bobbin.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: August 10, 2010
    Assignee: U.S. Energy Technologies, Inc.
    Inventor: Byung Il Ham
  • Patent number: 6917163
    Abstract: A lamp assembly configured to inductively receive power from a primary coil. The inductively powered lamp assembly includes a lamp circuit including a secondary and a lamp connected in series. In a first aspect, the lamp circuit includes a capacitor connected in series with the lamp and the secondary to tune the circuit to resonance. The capacitor is preferably selected to have a reactance that is substantially equal to or slightly less than the reactance of the secondary and the impedance of the lamp. In a second aspect, the inductively powered lamp assembly includes a sealed transparent sleeve that entirely encloses the lamp circuit so that the transparent sleeve is fully closed and unpenetrated. The transparent sleeve is preferably the lamp sleeve itself, with the secondary, capacitor and any desired starter mechanism disposed within its interior.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: July 12, 2005
    Assignee: Access Business Group International LLC
    Inventor: David W. Baarman
  • Patent number: 6831417
    Abstract: A lamp assembly configured to inductively receive power from a primary coil. The lamp assembly includes a lamp circuit including a secondary and a lamp connected in series. In a first aspect, the lamp circuit includes a capacitor connected in series with the lamp and the secondary to tune the circuit to resonance. The capacitor is preferably selected to have a reactance that is substantially equal to or slightly less than the reactance of the secondary and the impedance of the lamp. In a second aspect, the lamp assembly includes a sealed transparent sleeve that entirely encloses the lamp circuit so that the transparent sleeve is fully closed and unpenetrated. The transparent sleeve is preferably the lamp sleeve itself, with the secondary, capacitor and any desired starter mechanism disposed within its interior.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: December 14, 2004
    Assignee: Access Business Group International LLC
    Inventor: David W. Baarman
  • Publication number: 20040232845
    Abstract: An inductive coil assembly having multiple coils arranged at distinct orientations to provide efficient inductive coupling of power or communications or both to a device when the device is arranged at different orientations with respect to the inductive primary coil. In one embodiment, the inductive coil assembly includes three coils, each oriented along one of the x, y and z axes of a standard Cartesian three-dimensional coordinate system. The three separate coils provide effective transfer of power and communication when the device is at essentially any orientation with respect to the primary coil. In an alternative embodiment, the multi-axis inductive coil assembly of the present invention can function as a primary to inductively transmit power or communication or both over a plurality of magnetic fields at distinct orientations.
    Type: Application
    Filed: October 20, 2003
    Publication date: November 25, 2004
    Inventors: David W. Baarman, Terry L. Lautzenheiser
  • Patent number: 6731071
    Abstract: A lamp assembly configured to inductively receive power from a primary coil. The lamp assembly includes a lamp circuit including a secondary and a lamp connected in series. In a first aspect, the lamp circuit includes a capacitor connected in series with the lamp and the secondary to tune the circuit to resonance. The capacitor is preferably selected to have a reactance that is substantially equal to or slightly less than the reactance of the secondary and the impedance of the lamp. In a second aspect, the lamp assembly includes a sealed transparent sleeve that entirely encloses the lamp circuit so that the transparent sleeve is fully closed and unpenetrated. The transparent sleeve is preferably the lamp sleeve itself, with the secondary, capacitor and any desired starter mechanism disposed within its interior.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: May 4, 2004
    Assignee: Access Business Group International LLC
    Inventor: David W. Baarman
  • Patent number: 6710545
    Abstract: In a discharge lamp apparatus, a casing of an electronic controller unit for a discharge lamp is comprised of a resin casing and a metal casing and accommodates therein circuit components for generating a voltage supplied to the discharge lamp. The resin casing couples with and contacts with the connector part of the discharge lamp. A power MOS transistor is attached to the metal casing through a plate member made of an insulating material. With this arrangement, heat generated by the discharge lamp is less likely to transfer from the resin casing to the metal casing, and heat generated by the power MOS transistor is efficiently radiated from the metal casing to the outside.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: March 23, 2004
    Assignee: Denso Corporation
    Inventors: Hironao Yamaguchi, Koichi Toyama
  • Patent number: 6522085
    Abstract: An electrodeless fluorescent lamp comprises a closed-loop (“tokamak”) envelope, two ferrite cores, and an induction coil that is disposed on the envelope walls inside the closed-loop formed by the envelope. The envelope comprises two straight tubes of the same diameter. All coils' turns have essential the same length and are parallel to each other and to the closed-loop axis. Each ferrite core encircles a segment of each the coil's turn and one connecting tube. The lamp can be operated at driving frequencies of 100-600 kHz and lamp powers of 50-250 W. The ferrite core power losses were 6-8 W when the lamp was operated at a frequency of 200-300 kHz and lamp power of 140-150 W. The lamp light output was 12,500 lumen and luminous efficacy was 87 LPW.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: February 18, 2003
    Assignee: Matsushita Research and Development Laboratories Inc
    Inventors: Oleg A. Popov, Jagannathan Ravi, Robert Chandler, Edward Shapiro
  • Patent number: 6501216
    Abstract: A display includes a substrate and an emitter formed on the substrate. A first dielectric layer is formed on the substrate to have a thickness slightly less than a height of the emitter above the planar surface and includes an opening formed about the emitter. The display also includes a conductive extraction grid formed on the first dielectric layer. The extraction grid includes an opening surrounding the emitter. The display further includes a second dielectric layer formed on the extraction grid and a focusing electrode formed on the second dielectric layer. The focusing electrode is electrically coupled to the emitter through an impedance element. The focusing electrode includes an opening formed above the apex. The focusing electrode provides enhanced focusing performance together with reduced circuit complexity, resulting in a superior display.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: December 31, 2002
    Assignee: Micron Technology, Inc.
    Inventor: Zhongyi Xia
  • Patent number: 6429593
    Abstract: A lighting device comprises a discharge lamp (7) which is connected to a ballast and starting device (1) either directly or via an electric cable (4). Alternatively said discharge lamp (7) can be mechanically and electrically coupled to an external starting device (5) and electrically connected to the ballast and starting device (1) via a connecting cable (4).
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: August 6, 2002
    Assignee: Arnold & Richter Cine Technik GmbH & Co. Betriebs, KG DE
    Inventors: Klaus-Dieter Stegmaier, Wilfried Brauckmann
  • Patent number: 6057649
    Abstract: An illumination unit including an electrodeless low-pressure discharge lamp (20) and a supply device (50). The lamp has a discharge vessel (30) which encloses in a gastight manner a discharge space (31) which is provided with an ionizable filling. The lamp (20) further has a coil (40) provided with a winding (42) around a sintered core (41) of polycrystalline ferrite material, which winding (42) is connected to the supply device (50). The coil (40) is capable of inducing a high-frequency magnetic field which maintains a discharge in the discharge space (31). The losses in the core (41), when measured at room temperature in a magnetic field with a frequency of 3 MHz and a magnetic flux density of 10 mT, amount to at most 150 mW/cm.sup.3. This has the advantage that the lamp (20) ignites comparatively quickly and loads the supply device (50) comparatively weakly during ignition. The supply device (50) as a result can have a comparatively long useful life.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: May 2, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Pieter J. Van Der Zaag, Klaas Vegter, Petrus H. Antonis, Pieter J. Van Der Valk
  • Patent number: 5905343
    Abstract: An incandescent bulb having a looped filament within an evacuated bulb containing a gas mixture including a halogen employs magnetic means external to the bulb to provide inductive heating of the filament so that there are no connections passing through the bulb envelope. Alternative embodiments include a toroidal bulb wherein a second arm of a magnetic circuit passes normally through the center of the bulb toroid, alternating voltage excitation being supplied to a first arm of the magnetic circuit; and an elliptical bulb that is disposed between oppositely facing ends of a two-part second magnetic arm that is similarly excited. In a further embodiment, an additional arm of the magnetic circuit serves to form a non-uniform field in the vicinity of the filament, thereby to provide a lift force against the force of gravity so as to minimize filament sagging.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: May 18, 1999
    Inventor: Angus J. McCamant
  • Patent number: 5896009
    Abstract: A non-saturating inductor is connected in series with the filament of an incandescent lamp and the increase in resistance of the filament with respect to the increase in temperature is utilized to dynamically modulate the power factor of the circuit during a warm-up interval immediately following lamp turn-on.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: April 20, 1999
    Inventor: Jeffrey A. Rosenwald
  • Patent number: 5828174
    Abstract: A discharge lamp assembly has a discharge lamp, and an ignition device for the discharge lamp, the ignition device including at least one inductive component and at least one capacitive component, at least a part of one of the components being surrounded by at least a part of the other of the components, the ignition device further having a housing in which the components are arranged and which is connectable with the discharge lamp.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: October 27, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Hartmut Seiler, Bernhard Woerner, Ralf Kramp, Martin Frey, Ingo Gorille, Thomas Fabry
  • Patent number: 5359263
    Abstract: The present invention offers improvement of performance and efficiency of a compact fluorescent lamp by means of a series tuned LRC ballasting circuit. The resonant voltage rise in the circuit is utilized to increase the cyclic crest voltage necessary for lamp ionization. After ionization occurs, lamp current and power are clamped and regulated by the lower Q factor of the tuned circuit. The LRC circuit provides a square wave of voltage across the lamp with considerable reduction in noise and RF ringing. Since it is a tuned circuit, it operates at approximately unity power factor, at lower temperature, and with a net equivalent impedance that provides for maximum illumination, lamp life and efficiency.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: October 25, 1994
    Assignee: RemTech Company
    Inventor: Gary D. Roberts
  • Patent number: 5343123
    Abstract: A half-bridge inverter is powered from an ordinary electric utility power line by way of a full wave rectifier-filter means. The high frequency voltage output of the inverter is loaded with a series-combination of a tank inductor and a tank capacitor, with a fluorescent lamp being connected in parallel with the tank capacitor. The ON-time of each of the inverter's two transistors is shorter than half the period of the high frequency voltage; thereby preventing the two transistors from conducting simultaneously; thereby, in turn, protecting the inverter from self-destruction in case of lamp failure.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: August 30, 1994
    Inventor: Ole K. Nilssen
  • Patent number: 5262700
    Abstract: A special fluorescent lamp is provided with its own built-in cathode heating means and is operable to be properly ballasted by way of a light-weight two-wire power cord coming from a special power plug that comprises a built-in high-frequency ballasting means. This special power plug is suitable for being plugged into, held by, and powered by any ordinary household electric power receptacle. The combination of the special fluorescent lamp and the special power plug constitutes a product similar to the so-called bright-stick marketed by General Electric.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: November 16, 1993
    Inventor: Ole K. Nilssen
  • Patent number: 5118990
    Abstract: A discharge lamp system, particularly for vehicular headlamp applications, broadly comprises a discharge lamp assembly and a lighting circuit assembly. The discharge lamp assembly comprises a discharge lamp unit, and a lamp carrier subassembly mechanically supporting the discharge lamp unit and electrically connected thereto. The lighting circuit assembly comprises an electric lighting circuit mounted within a housing or housings for causing the discharge lamp unit to glow by an electric discharge. The discharge lamp assembly and the lighting circuit assembly are directly interconnected both mechanically and electrically, in order to dispense with cables or cords that have been conventionally used for their electrical interconnection.
    Type: Grant
    Filed: December 6, 1990
    Date of Patent: June 2, 1992
    Assignee: Koito Manufacturing Co., Ltd.
    Inventor: Hiroyuki Makita
  • Patent number: 5066892
    Abstract: A glow discharge lamp includes a sealed lamp envelope containing a noble gas and mercury, a cathode and an anode disposed in the lamp envelope and an incandescent filament for emitting visible light for illumination immediately upon application of power and for emitting little or no visible light after a glow discharge is formed between the cathode and the anode. The filament, the cathode and the anode are electrically connected in series. The lamp envelope typically includes a phosphor coating for emission of visible light upon absorption of ultraviolet radiation from the glow discharge. An optional switch can be used for disconnecting the filament during steady state operation of the glow discharge lamp.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: November 19, 1991
    Assignee: GTE Products Corporation
    Inventors: Andre C. Bouchard, Radomir Lagushenko, Jakob Maya
  • Patent number: 5048068
    Abstract: A diode pulser is described which comprises a diode and an inductor connected in series, the impedance of the diode being controllable to suddenly increase the impedance to produce a high voltage pulse across the diode. The diode can include a pair of spaced electrodes (12, 14 in FIG. 2) forming a gap between them across which electrons move when a voltage is applied. To increase the impedance, a magnetic field (38) is suddenly applied parallel to the electrode surfaces, to bend the electron paths so as to require a much higher voltage to move the electrons across the gap, the inductor (26) creating such voltage to maintain the current flow for a brief time. The diode pulser is useful as a rapid-acting switch, and as a source of high energy electrons that are useful to generate X-rays, microwaves, and for other purposes.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: September 10, 1991
    Inventor: Peter J. Turchi
  • Patent number: 4931696
    Abstract: In a fluorescent lamp, a circuit board assembly is provided within the base of the lamp. The circuit board assembly includes a circuit board having a plurality of conductive runs thereon, a lamp starter circuit and device electrically coupling the pins of the lamp base to the circuit board. The conductive runs have a concave cut-out portion located immediately adjacent the location where an electrical coupling lead is coupled (e.g. by soldering) to the runs. The concave cut-out portion prevents the circuit runs from lifting off from the circuit board when the electrical coupling lead is bent after being coupled to the circuit runs.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: June 5, 1990
    Assignee: GTE Products Corporation
    Inventor: Boyd G. Brower
  • Patent number: 4912738
    Abstract: A diode pulser is described which comprises a diode and an inductor connected in series, the impedance of the diode being controllable to suddenly increase the impedance to produce a high voltage pulse across the diode. The diode includes concentric electrodes forming a gap between them across which electrons move. To increase the impedance, a magnetic field is suddenly applied parallel to the electrode surfaces, to bend the electron paths so as to require a much higher voltage to move the electrons across the gap, the inductor creating such voltage to maintain the current flow for a brief time. The diode pulser is useful as a rapid-acting switch, and as a source of high energy electrons that are useful to generate X-rays, microwaves, and for other purposes.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: March 27, 1990
    Assignee: R & D Associates
    Inventor: Peter J. Turchi
  • Patent number: 4891558
    Abstract: An adapter for gas discharge lamps has a housing comprising a socket for connection to the mains and a holder for the gas discharge lamp or low voltage lamp, wherein the series reactor, choke, transformer and/or transmitter with coil and magnetic circuit are arranged to surround the holder for the gas discharge lamp in the housing. To provide an adapter in compact form with small dimensions and low weight which can be simply made, the coil is wound as a circular toroidal coil or a polygon toroidal coil around the longitudinal axis of the adapter, while the magnetic circuit is made to surround the circular toroidal coil or the polygon toroidal coil on all sides and form locked on the exteriors of said coil.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: January 2, 1990
    Assignee: May & Christe GmbH Transformatorenwerke
    Inventor: Robert Tschuk
  • Patent number: 4751430
    Abstract: In a spark plug connector for a high-voltage distributor-less high-voltage capacitor ignition system, comprising an ignition transformer and a storage capacitor connected on the secondary side to the ignition transformer, the spark plug connector is made rod-shaped with diameter dimensions corresponding to those of a spark plug and contains the storage capacitor and ignition transformer arranged one behind the other, the ignition transformer being disposed at the end of the spark plug connector remote from the spark plug connection.
    Type: Grant
    Filed: December 16, 1986
    Date of Patent: June 14, 1988
    Assignee: BERU Ruprecht GmbH & Co. KG
    Inventors: Helmut Muller, Werner Niessner, Dieter Teutsch
  • Patent number: 4695767
    Abstract: To reliably attach a connection lead (12) to a screw-in sleeve (9) fitted er a connection portion (3) of a base body (1) which retains parallel legs of a compact fluorescent lamp (5), the current supply lead is bent over in a groove (13) formed at an end face of the connection portion (3) and carried along parallel thereto at the inside of the screw-in sleeve, to provide for reliable electrical and mechanical connection, and retained in position by a punch retention of the screw-in sleeve on the connection portion (3) of the base body.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: September 22, 1987
    Assignee: Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
    Inventor: Horst Wittmann
  • Patent number: 4656395
    Abstract: To facilitate assembly of tiny cores used in accessory circuitry for a flescent lamp, bases of two transistors (20, 20') are connected to inductive windings on a core (2) which is retained by a primary winding (3) on the printed circuit (PC) board (1). The windings connected to the bases are formed by U-shaped wires surrounding the core which--preferably--is a toroidal core. The windings may include a resistor (8, 8') located within the toroidal core to heat quickly and, also, heat the core, the resistor extending at right angles to the PC board and forming one leg of the U-shaped conductor legs forming the impedance winding around the core.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: April 7, 1987
    Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Hans-Jurgen Fahnrich, Erhard Rasch
  • Patent number: 4503358
    Abstract: A fluorescent lamp device according to the present invention includes a ballast, a screw base electrically connected to the ballast, a fluorescent tube curved in an arc at three portions thereof, a bowl-shaped member for housing the ballast with the screw base fixed projecting outside therefrom, a globe, and a partition plate attached to an open end of the member so as to thermally isolate or insulate the ballast from the fluorescent tube and to which the fluorescent tube is fixed. The bowl-shaped member is provided with a plurality of ventilating slits for discharging heat radiated from the ballast, and also with air-ducts for communicating the space inside the globe with the outside air. The globe is also provided with holes at the top portion thereof.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: March 5, 1985
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Taketo Kamei, Kimio Osada
  • Patent number: 4456900
    Abstract: A high frequency coil including an inductance device formed by fitting a pair of electrode caps at both ends of a ferrite magnetic core wound by a winding on a peripheral surface of the core; a heat resistant electric insulating coated layer formed on the peripheral surface of the inductance device and a heat resistant electric insulating resilient tube fitted onto the peripheral surface of the coated inductance device.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: June 26, 1984
    Assignees: TDK Electronics Co., Ltd., NGK Spark Plug Co., Ltd.
    Inventors: Yohtaro Toyoshima, Yasuhiro Sasaki, Minoru Uchida
  • Patent number: 4455508
    Abstract: Low-pressure mercury vapor discharge lamp having an electrical stabilization ballast 10 which occupies a central position in the lamp. The discharge vessel surrounds the ballast.In order to dissipate the heat generated by the ballast during operation to the environment of the lamp, a thin-walled heat sink of a heat-conductive material which bears on the ballast is provided between the ballast and the discharge vessel, this body having a collar which extends as far as the exterior of the lamp.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: June 19, 1984
    Assignee: U.S. Philips Corporation
    Inventor: Gustaaf A. Wesselink
  • Patent number: 4449071
    Abstract: A fluorescent lamp device including an outer tube containing a fluorescent lamp therein, a connection tube connected to one end of the outer tube, a cap containing a glow starter and a condenser connected to the other end of the outer tube, and a base member connected to the connection tube. The base member contains a ballast member including a thermistor and a thermal adjustment member having a plurality of radiation fins, which are connected electrically and thermally through a conductive plate.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: May 15, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventor: Nobuo Yokoyama
  • Patent number: 4443740
    Abstract: A dimmer switch for a fluorescent lamp having a gaseous discharge light bulb, the switch being adapted to be connected in a ballast circuit including the light bulb and comprising a tapped inductor having a plurality of coil segments connected in series with one another and a plurality of taps or terminals, one at each end of the inductor and one between each adjacent pair of coil segments, with a first one of the end terminals of the inductor being adapted to be connected in the ballast circuit. The switch further comprises a movable switch member for selectively connecting any one of the terminals other than the stated first end terminal in the ballast circuit, whereby, for a given ballast circuit input voltage, the impedance of the inductor as connected in the ballast circuit and thus the ballast circuit current may be varied to produce the desired level of light output of the bulb by adjusting said movable switch member.
    Type: Grant
    Filed: April 9, 1982
    Date of Patent: April 17, 1984
    Inventor: Charles D. Goralnik
  • Patent number: 4417176
    Abstract: A compact fluorescent lamp having a chassis member, a screw base screwed to the chassis member, a base member secured to the chassis member, a winding envelope having bent part and both ends oriented to the same direction, a ballast surrounded by the winding envelope and a globe member attached to the base member. The ballast is disposed between the bent part and the ends of the winding envelope so as to provide the winding envelope with a desirable coolest wall temperature.
    Type: Grant
    Filed: July 22, 1981
    Date of Patent: November 22, 1983
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Taketo Kamei, Motokazu Hayashi, Kimio Osada, Mitsutoshi Kimura
  • Patent number: 4410834
    Abstract: A circular fluorescent lamp unit comprises a circular tubular fluorescent mp; a housing secured inside the space formed by the circular fluorescent lamp, the housing containing the ballast and starting device; and a base for connection to a supply voltage, the base being connected to the housing concentrically with the circular fluorescent lamp. The improvement resides in that the housing is an elongate hollow body which extends diametrically across the space defined by the circular fluorescent lamp; the housing having one end for enclosing the ends of the circular fluorescent lamp and another end for taking support against the wall of the circular fluorescent lamp which is diametrically opposite to the ends of the circular fluorescent lamp. In a preferred embodiment, the housing comprises two interconnected form locking housing cup-shaped members.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: October 18, 1983
    Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Dieter Witte, Alfons Jendrewski, Gerhard Nadler
  • Patent number: 4386296
    Abstract: A screw-in fluorescent light unit having two light levels, for use in a 3-way socket. A reactor ballasts the lamp for high light output, and a positive temperature coefficient resistor (thermistor) is added to ballast the lamp for low light output and to facilitate lamp starting at the low light output. The light-level sequence is off-high-low-high-off.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: May 31, 1983
    Assignee: General Electric Company
    Inventor: Charles E. Beck
  • Patent number: 4383200
    Abstract: Low-pressure mercury vapor discharge lamp comprising a, preferably folded, discharge tube located within a lamp envelope and having electrodes and an electric stabilization ballast, which is partly surrounded by a thin-walled lamp base, which is connected to the envelope.In the region of the connection between the lamp base and the lamp envelope there is a metal plate for cooling the ballast, this heat sink being at the same time a mounting plate for further components in the lamp such as a starter switch.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: May 10, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Adrianus J. H. J. Van Zon, Johannes R. Gelens
  • Patent number: 4375607
    Abstract: The convoluted fluorescent lamp component of a compact lamp unit is mechanically and electrically coupled to a base module by a plate-like mounting member which is secured to the module in suspended fashion and has socket means which permit the lamp component and associated energizing-circuit components to be plugged into and removed from the module. The mounting member is structured and oriented to also provide a peripheral air passageway which, in conjunction with vent openings in the module and in a protective cover which is secured to the module, allows air to flow freely through the operating unit and convection-cool the fluorescent lamp. The lamp unit can accordingly be operated at high power loadings without overheating and can also be easily relamped and provided with new circuit components (such as a ballast and/or a starter) to prolong its useful life.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: March 1, 1983
    Assignee: Westinghouse Electric Corp.
    Inventors: Edward W. Morton, Thomas E. Dooley, Daniel W. O'Mullan
  • Patent number: 4353007
    Abstract: The invention relates to a lamp unit provided with a mercury vapor discharge tube and a stabilization ballast which forms one mechanical whole therewith. This lamp unit is provided with a lamp base of a type which is customary for incandescent lamps.In accordance with the invention the discharge tube is a low-pressure discharge tube having a relatively high arc voltage. This results in a lamp unit whose ballast portion is small.
    Type: Grant
    Filed: February 26, 1980
    Date of Patent: October 5, 1982
    Assignee: U.S. Philips Corporation
    Inventors: Jozef C. Moerkens, Leonard Woldring
  • Patent number: 4349768
    Abstract: A method for starting and operating a preheat type fluorescent lamp includes a source of alternating current, a fluorescent lamp having a low impedance starting mode wherein current passes through one or more starting filaments and a high impedance operating mode wherein current passes through the length of the lamp, a starting switch directing current through the starting filaments in the lamp starting mode, and an inductor ballast having a magnetically permeable core operating in a saturated condition when the lamp is in the low impedance starting mode and in a non-saturated condition when the lamp is in the high impedance operating mode.
    Type: Grant
    Filed: June 26, 1980
    Date of Patent: September 14, 1982
    Assignee: Creators, Inc.
    Inventor: Jack V. Miller
  • Patent number: 4341979
    Abstract: An arc discharge device such as a fluorescent lamp comprising an outer envelope having an inner phosphor coating. A rotating field magnetic arc spreading device is disposed in close proximity to the envelope at each end of the lamp envelope. The envelope has a circular cross section.
    Type: Grant
    Filed: February 14, 1980
    Date of Patent: July 27, 1982
    Inventors: Leo Gross, S. Merrill Skeist
  • Patent number: 4316121
    Abstract: An integrally connected fluorescent lamp and ballast unit having an elongated ballast of wire wound around and along an elongated magnetizable core and extending alongside an elongated lamp bulb. The elongated lamp and ballast can be straight, or can be curved. The ballast provides a combined resistive and inductive ballasting impedance for the lamp.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: February 16, 1982
    Assignee: General Electric Company
    Inventors: Edward E. Hammer, Eugene Lemmers
  • Patent number: 4311942
    Abstract: A compact fluorescent lamp with a screw-in plug to fit conventional screw sockets which operates at 20-30 watts and provides the lumen output of a 75-100 watt lamp. The lamp is essentially a hollow cylinder with a glass envelope for the two outer walls. The space between the two outer walls is partitioned to constrain the arc discharge to follow a designated path around the inner surface of the lamp. Efficiency is promoted by novel ballast design. The screw-in fluorescent lamp contains a coil in the center of the lamp which creates a diverging magnetic field which causes the arc discharge to spread and may also serve the dual purpose of limiting arc current. Arc spreading coils of several designs are disclosed to provide oriented diverging magnetic fields, rotating diverging magnetic fields and magnetic fields shaped to the lamp envelope with which they are employed.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: January 19, 1982
    Assignee: Spellman High Voltage Electronics Corp.
    Inventors: S. Merrill Skeist, Leo Gross
  • Patent number: 4311943
    Abstract: An arc discharge device such as a fluorescent lamp comprising an outer envelope having an inner phosphor coating. An arc spreading assembly is disposed in said envelope. There is provided a recombination structure in the form of fine glass or quartz fibers disposed in the envelope.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: January 19, 1982
    Assignee: Spellman High Voltage Electronics Corp.
    Inventors: Leo Gross, S. Merrill Skeist