Patents Examined by Thomas J. Kozma
  • Patent number: 6075431
    Abstract: A transformer has a bobbin made of a resin material having flanges (2a to 2f) formed thereon, at least three chambers defined between the adjacent flanges. A primary auxiliary winding (P2), which supplies an electric power to an drive-control and overvoltage protection circuit and a primary excitation winding (P1-1) are wound on the chambers (3a and 3c) with at least one chamber (3b) disposed therebetween. A secondary winding (S2) which consumes the electric power always is wound on the chamber (3b) between the chambers (3c and 3a) on which the primary excitation winding (P1-1) and the primary auxiliary winding (P2) are wound.
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: June 13, 2000
    Assignee: TDK Corporation
    Inventor: Tooru Honma
  • Patent number: 6069548
    Abstract: The invention relates to a planar transformer arrangement for an electric circuit located on a circuit board. The arrangement comprises (a) a first circuit board (PCB1) on which said electric circuit has been implemented, (b) a supplementary circuit board piece (PCB2), (c) a primary winding which comprises at least one substantially planar conductive pattern formed on a circuit board, (d) a secondary winding which comprises at least one substantially planar conductive pattern formed on a circuit board, and (e) a transformer core (F1, F2) which surrounds the primary and secondary windings at least partially. To create an inexpensive but efficient transformer structure suitable for use in an automatic manufacturing process, both the primary and the secondary windings have been formed on the supplementary circuit board piece (PCB2).
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: May 30, 2000
    Assignee: Nokia Telecommunications Oy
    Inventors: Gosta Baarman, Seppo Pelkonen
  • Patent number: 6046663
    Abstract: A transformer comprising: a coil bobbin which includes a pair of core winding portions and a pair of coupling portions for coupling the core winding portions so as to space the core winding portions a predetermined distance from each other and is formed, on its whole outer periphery, with a groove; a winding which is obtained by winding a conductor around the groove of the coil bobbin a predetermined number of times; and a pair of wound cores each of which is obtained by winding an electromagnetic steel plate around each of the core winding portions of the coil bobbin a predetermined number of times; wherein an outer peripheral surface of each of opposite side walls of the groove at the core winding portions is curved so as to have an arcuate cross-sectional shape.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: April 4, 2000
    Assignees: Kawatetsu Electric Engineering Co., Ltd., Nishimoto Gosei Hanbai Co., Ltd.
    Inventors: Tokutaro Kubomura, Shiro Kokura
  • Patent number: 6031441
    Abstract: A ballast stabilizer includes a stack of annular silicon steel plates defining a center through hole, a perforated bottom-open casing mounted within the center through hole of the stack of annular silicon steel plates, a winding holder mounted within the casing, the winding holder having a center open chamber, a peripheral wire groove, and a winding mounted in the peripheral wire groove around the winding holder, a stack of I-shaped silicon steel plates received in the open chamber of the winding holder, and a varnish coating covered over the stack of annular silicon steel plates and filled up the gaps in the casing, the winding holder and the stack of I-shaped silicon steel plates.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: February 29, 2000
    Inventor: Kan-Lin Yen
  • Patent number: 6025770
    Abstract: An ignition coil having a transformer surrounding a cylindrical magnetic core. The transformer has a primary coil, to which a DC potential is applied in bursts and which generates a primary magnetic field, and a secondary coil, which retrieves induced electromotive force. An outer cylinder, surrounding the transformer, is also provided. At at least one end of the ignition coil at least one toroidal magnet is located. The inside and outside perimeters of the toroidal magnets have polarities which are opposite to each other. When a plurality of magnets is provided, they are nested inside one another between the magnetic core and the outer cylinder. The direction of the reverse biasing magnetic field generated by the magnet(s) is opposite to that of primary magnetic field generated by the primary coil. The foregoing construction provides a compact ignition coil which is efficient in operation and is capable of making effective use of the induced electromotive force generated.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: February 15, 2000
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Noriya Okamoto, Shinichi Amano
  • Patent number: 6020806
    Abstract: A degaussing coil designed to be mounted on the glass panels of cathode-ray tubes used to display color images wherein, the link between the ends of the winding of the degaussing coil and the conductors provides connection to the electrical supply circuit is encased in an insulating thermoplastic material. The degaussing coils is utilized for color television receivers.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: February 1, 2000
    Assignee: Thomson Television Components France
    Inventors: Jean-Claude Sey, Daniel Vittoz, Christophe Lanaud
  • Patent number: 6018285
    Abstract: A wire-wound component to be mounted on a printed circuit board. The wire-wound component is formed by winding a wire on the body of the wire-wound component and by winding both end portions of the wire on terminals. The terminals and the body of the wire-wound component are formed as one unit by molding same from a heat-resistant resin material. The molded terminals, on which both end portions of the wire are wound, are inserted into the printed circuit board, and then connected to a circuit pattern on the printed circuit board by soldering.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: January 25, 2000
    Assignee: Funai Electric Co., Ltd.
    Inventor: Osamu Maeda
  • Patent number: 6005463
    Abstract: A device for electrically interconnecting the wire leads of various electronic elements within a microminiature package. A non-conducting base member having a plurality of electronic element barriers and wire lead through-holes is provided. The through-holes are generally located within the interior regions of the base element to minimize potentially detrimental field interactions or capacitive coupling between the leads and the external package terminals. During package assembly, the electronic elements are placed within recesses created within the base member by the aforementioned barriers. These recesses and barriers align the elements and help maintain electrical separation and uniformity during manufacturing. The wire leads from two or more elements are interconnected by twisting them together and inserting them into one of the through-holes.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: December 21, 1999
    Assignee: Pulse Engineering
    Inventors: James D. Lint, Aurelio J. Gutierrez, Victor H. Renteria
  • Patent number: 6002319
    Abstract: An inductance device comprises: an EE type ferrite core with an air gap at a center leg portion; a bobbin having at least three chambers wound by coils, said ferrite core being placed on said bobbin; and a shield coil formed by a first part and a second part of the coil, in which the first part is wound a chamber surrounding a peripheral portion of the air gap and the second part is wound the chamber in a reverse direction of the first part, the ends of the shield coil being short-circuited. In the inductance device with gap, the first and second parts of the coil are wound in the chamber surrounding the peripheral portion of the air gap in opposite direction each other, and the ends of the coil are shorted circuited. Thus, it is formed the shield coil for a leak magnetic flux from the air gap containing a component perpendicular to the main magnetic flux.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: December 14, 1999
    Assignee: TDK Corporation
    Inventor: Tooru Honma
  • Patent number: 5990775
    Abstract: An elastic molded insulating member such as rubber and elastomers is mounted at the end of an electrostatic shield ring attached to the end of a winding, or an electrostatic shield ring is made of an elastic material. The electrostatic shield is in tight contact with the winding, reliably improving the dielectric strength.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: November 23, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akifumi Inui, Tsuneharu Teranishi
  • Patent number: 5986532
    Abstract: The invention is directed to an ignition coil for an internal combustion engine which includes a columnar member having a plurality of magnetic plates, e.g., silicon steel plates stacked one on the other with stacked portions formed on the magnetic plates. The magnetic columnar member includes a first portion having a plurality of magnetic plates stacked one on the other in accordance with increase of a width of each plate, a second portion connected to the first portion and having a plurality of magnetic plates with the same width stacked stacked one on the other, and a third portion connected to the second portion and having a plurality of magnetic plates stacked one on the other in accordance with decrease of a width of each plate, thereby to form the columnar member with a middle portion thereof having a substantially circular cross section.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: November 16, 1999
    Assignees: Aisan Kogyo Kabushiki Kaisha, Miyama-Seiko Manufacturing Co., Ltd.
    Inventors: Hikaru Kikuta, Katsuo Yoshihara
  • Patent number: 5986533
    Abstract: A monolithic thick film inductor is made by printing alternating conductive layers and dielectric layers above one another, using the same dielectric printing screen and the same conductor printing screen for printing each of the dielectric layers and the conductive layers respectively. Each of the coil printing screen and the dielectric screen are indexed to n different positions in order to print each of the n layers. The resulting inductor includes a plurality of helical coil segments stacked above one another and electrically connected to one another to create the desired number of coil turns.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: November 16, 1999
    Assignee: Dale Electronics, Inc.
    Inventors: Herman R. Person, Kyle Clark, Scott D. Zwick, Jeffrey T. Adelman, Thomas L. Veik
  • Patent number: 5977853
    Abstract: There is provided a choke coil having a sufficient noise eliminating effect against common mode and normal mode noises. The choke coil has two bobbins, a pair of windings wound around the respective bobbins, first and second magnetic cores which are each inserted in cylindrical body portions of the bobbins at one side thereof, and a support member for supporting the cores. The first magnetic core is in the form of the character B and made of a material having lower permeability. The second magnetic core is in the form of the character D and made of a material having higher permeability. A predetermined gap is maintained between the cores by a spacer provided on the top surface of the support member.
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: November 2, 1999
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takaaki Ooi, Kouichi Yamaguchi, Tatsuyuki Yamada, Iwao Fukutani
  • Patent number: 5977854
    Abstract: An electromagnetic noise absorber has a pair of ferrite cores arranged with open ends of the ferrite cores facing each other. Each of the ferrite cores includes an axial portion, an outer cylindrical portion and a bottom portion and is constructed by coupling an end of the axial portion and an end of the outer cylindrical portion to the bottom portion. A slot is formed in the outer cylindrical portion and the bottom portion of each ferrite core such that the slot extends from the open end of the outer cylindrical portion to the bottom portion. The electromagnetic noise absorber can be easily attached to a signal line by placing the signal line in the slots and turning one of the ferrite cores. Since the signal line are wound around the axial portion of the ferrite cores, the signal line has a high impedance.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: November 2, 1999
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hideyuki Mihara, Satoshi Murata, Yukio Sakamoto
  • Patent number: 5977857
    Abstract: The object of the present invention is to provide a chip inductor structured for miniaturization, excellent mass-producibility and high reliability.A chip inductor of a sealed type having a square-shaped winding comprises a bobbin for winding, which has a square-shaped flange on its both ends, and a metal terminal sticking out from the outer side surface of each respective flange and each respective metal terminal being bent inside each respective flange upward so as to stick out to the upper side surface of the flange, also have the foregoing metal terminal further bent along the upper side surface of the flange, and further make insert-molding of the foregoing bent terminal possible to form the bobbin for winding.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: November 2, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shunji Hashimoto, Mikio Taoka, Hideo Nakano
  • Patent number: 5963120
    Abstract: A coil support for accommodating at least one coil wire of an electromagnet, more particularly for use in electromagnetic valves, includes a hollow-cylinder-shaped support part having ends which are provided with stops defining the coil in its axial position. The support part has a step in its diameter which is limited on both sides by the coil wire with different winding layers and on which the coil wire is guided.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: October 5, 1999
    Assignee: ITT Manufacturing Enterprises Inc.
    Inventor: Dalibor Zaviska
  • Patent number: 5952907
    Abstract: A blind hole pot core transformer comprised of a base member having a toroidal channel with a central post and a cover member also having a toroidal channel with a central post. A bobbin winding is positioned within a cavity defined by the toroidal channels of the base and cover members with a core comprised of the central posts of the base and cover member positioned within an opening in the bobbin winding. A compressible alignment member is positioned within an opening formed on outer mating surfaces of the central posts of both the base and cover members to retain the base and cover members in a desired orientation with respect to each other. The compressible alignment member has a cross-sectional area that is greater than the openings in the base and cover members so that any gap between the alignment member and the inner walls of at least one of the openings is eliminated thereby facilitating alignment between the central posts comprising the core of the device.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: September 14, 1999
    Assignee: Pulse Engineering, Inc.
    Inventors: Michael D. McWilliams, Russell L. Machado
  • Patent number: 5952908
    Abstract: A coil bobbin comprises:a cylindrical body having a through hole in the center thereof; a separating flange formed on an outer surface of the cylindrical body between opposite ends thereof; a coil winding portion provided on one side of the separating flange in a longitudinal direction of the cylindrical body; a lead wire retaining portion provided on the other side of the separating flange in the longitudinal direction of the cylindrical body; a protector provided at the end of the lead wire retaining portion for protecting a lead wire to be placed in the lead wire retaining portion.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: September 14, 1999
    Assignee: Mita Industrial Co., Ltd.
    Inventor: Tsutomu Kubo
  • Patent number: 5952909
    Abstract: A process of producing a multi-layered printed-coil substrate as a planar magnetic component for use as a transformer or a choke in a switched mode power supply circuit, etc. in which several types of printed-coil substrates having individually different coil patterns are prepared, some of them are selected depending upon the desired characteristics of planar magnetic component, and the selected substrates are layered to obtain a multi-layered printed-coil substrate. A printed-coil component, wherein pin terminals erected on insulating bases are inserted through through-holes formed in the printed-coil substrate having patterned coils in a single or several layers and pin terminals are soldered to the through-holes.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: September 14, 1999
    Assignee: Sumitomo Special Metals Co., Ltd.
    Inventors: Tohru Umeno, Naoki Arai
  • Patent number: 5942964
    Abstract: A noise absorbing apparatus includes a pair of ferrite members and a pair of covers. The ferrite members are located to oppose each other in tight contact with each other to clamp a cable therebetween. The covers cover the ferrite members. The covers form opening portions through which the cable is inserted. The covers are integrally formed with cable clamping pieces partly projecting in a radially inward direction of the opening portions. Each of the cable clamping pieces has a direction of thickness which is aligned with the radial direction of the cable. The cable is clamped with an elastic deformation force of the cable clamping pieces in the direction of thickness.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: August 24, 1999
    Assignee: Takeuchi Industrial Co., Ltd.
    Inventor: Yasuichi Takeuchi