Patents Examined by S. Steward
  • Patent number: 4540967
    Abstract: This invention relates to a molded transformer whose windings are cast-insulated with a cast resin, and consists in disposing an electrically conductive layer within the resin insulation of the winding and grounding the conductive layer, thereby to enhance a withstand voltage with the dimensions of the air gap between the windings reduced and with a winding supporting spacer omitted.
    Type: Grant
    Filed: June 28, 1982
    Date of Patent: September 10, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takashi Chitose
  • Patent number: 4488136
    Abstract: A combination transformer with common yoke core characterized by the combination of a main transformer and series transformers, which transformers have separate and complete core and coil assemblies with a common core leg or yoke to reduce the core size, weight and loss.
    Type: Grant
    Filed: August 23, 1983
    Date of Patent: December 11, 1984
    Assignee: Westinghouse Electric Corp.
    Inventors: Irvin L. Hansen, Randall W. Haack
  • Patent number: 4486731
    Abstract: A coil assembly with reduced anisotropy has a pancake type loop winding of one or more turns with which is interrelated one or more strips or bodies of magnetically permeable material. The permeable material provides as compared with air a lower reluctance flux path that passes through the pancake coil from one side to the other thereof. The permeable strips are shown and described generally in the shape of an open or interrupted "cross".
    Type: Grant
    Filed: June 10, 1982
    Date of Patent: December 4, 1984
    Assignee: Sensormatic Electronics Corporation
    Inventor: Vernon C. Westcott
  • Patent number: 4482879
    Abstract: A transformer having a laminated core and a coil enclosing a leg portion of the core, has a thin plastic frame means interleaved between an adjacent pair of core laminations in liquid-tight relation therewith to form, with the pair of core laminations, a completely enclosed internal passageway in the core for the circulation therethrough of a liquid cooling medium for cooling the core during transformer operation. The frame means has inlet and outlet connections projecting outwardly of the core for connection to a supply of a liquid cooling medium, and they communicate with the opposite ends of the internal cooling liquid passageway in the core through slot-shaped openings extending edgewise through the frame side walls.
    Type: Grant
    Filed: February 24, 1983
    Date of Patent: November 13, 1984
    Assignee: Park-Ohio Industries, Inc.
    Inventor: Stanley E. Jackowicz
  • Patent number: 4482880
    Abstract: An iron core including two outer legs and a central leg connected at each end to a different one of the outer legs through a yoke. Each of the outer legs includes a stack of trapezoid laminations connected to a stack of trapezoid laminations of the yoke alternating its trapezium laminations through angle butt joints arranged stepwise with equal incremental intervals, the yoke laminations being longer than one another by equal increments equal to that intervals. The central leg includes a stack of parallelogramic laminations alternating those inverted widthwise from the same and connected in lapped relationships to the yoke laminations.
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: November 13, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihiro Ohta, Hidenori Kawakami, Keiji Tsuruta
  • Patent number: 4471334
    Abstract: An on-load tap-changing transformer in which its high-voltage winding is axially divided into parallel-connected halves, and an end conductor constituting part of the high-voltage winding is connected to the other terminal of each of the halves. A coarse tap coil connected by the end conductor to the other terminal of each of the halves of the high-voltage winding is disposed adjacent to the associated half, and a fine tap coil connected to the coarse tap coil through a coarse tap selector used for the change-over of the tap position to the taps of the coarse tap coil is disposed at a radial position spaced apart from the coarse tap coil. The end conductor is wound together with the conductors of the fine tap coil.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: September 11, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Masaru Watanabe, Minoru Hoshi, Shigeo Kikuchi
  • Patent number: 4467305
    Abstract: A gas/vapor electromagnetic induction machine comprises an annular coil container including two coaxial electrically insulating cylinders connected at lower ends to an annular bottom plate and coaxially disposed around an iron core within an enclosed tank charged with a non-condensable electrically insulating gas and a condensable cooling gas. A dripping pan receives a condensate of the cooling gas located on the lower portion of the tank through the operation of a pump and drops the condensate into the annular coil container and onto the iron core assembly located within the annular coil container. Thus a coil is always partially or entirely immersed in the condensate collected in the annular coil container.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: August 21, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Nobuyoshi Ando
  • Patent number: 4464645
    Abstract: An angular displacement transducer of the variable reluctance type is disclosed. It utilizes two relatively rotatable rotors with two sets of magnetic circuits and a coil associated with each magnetic circuit. Each set of magnetic circuits has a set of magnetic cores, one-half the cores on one rotor and one-half on the other rotor. A pair of cores in the first set, one on each rotor, coact with each other to provide a first variable reluctance magnetic circuit which is magnetically linked with the first coil and which has a reluctance that varies with relative rotation of the rotors. A pair of cores in the second set, one on each rotor, coact with each other to provide a second variable reluctance magnetic circuit which is magnetically linked with the second coil and which has a reluctance that varies with relative rotation of the rotors.
    Type: Grant
    Filed: August 6, 1982
    Date of Patent: August 7, 1984
    Inventor: Peter Norton
  • Patent number: 4462015
    Abstract: A joystick mechanism generates output signals corresponding to the X and Y components of a manual command. A transducer mounted in a housing includes a ferromagnetic vane member connected to the bottom of a handle extending into the housing. The transducer also includes a stator member having nine legs mounted in a 3 by 3 rectangular array. The primary winding is wound around the central leg. Two pairs of opposed secondary windings are wound around each set of three outside legs, wherein the X-axis is disposed between one pair of secondary windings and the Y-axis is disposed between the other pair of secondary windings. Primary windings may be wound around the central three legs to form a symmetrical cruciform. The handle can be fixed to a deformable top plate or be supported at a rigid top plate by a ball and socket.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: July 24, 1984
    Inventor: Yishay Netzer
  • Patent number: 4449111
    Abstract: A transformer has an insulator interposed between respective primary and secondary coils wound on a coil bobbin which has an axial winding part and opposing radially extending flanges. The insulator is made from a continuous sheet of material which is corrugated to provide an insulating base having a width larger than the width of the winding part of the coil bobbin and from a continuous, plastic insulating sheet member having substantially the same width as the winding part. The corrugated insulated base material and insulating sheet member are wound between the primary coil and the secondary coil and the corrugated insulating base is bent at both side edges to be L-shaped to intimately fit to the inner surface of the flanges of the coil bobbin so as to provide an insulator which positively prevents coil wire at each end portion of the coil from dropping out of alignment with respective coil turns.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: May 15, 1984
    Assignee: Tamura Seisakusho Co., Ltd.
    Inventor: Tomoo Nakajima
  • Patent number: 4438421
    Abstract: A vibration resistant mounting bracket (10) that secures a power transformer (20,30) within the housing of an aircraft ignition system. The bracket (10) has a single source (11) that extends through the winding (30) and partially around the core (20) of the transformer and is characterized by a pair of downwardly facing surface portions (44, 45) and a pair of upwardly facing surface portions (52,53) which are located in parallel planes with each pair of surfaces being axially offset from each other.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: March 20, 1984
    Assignee: The Bendix Corporation
    Inventor: Earl A. Leach, Jr.
  • Patent number: 4429294
    Abstract: A coil form for a transformer having air-cooled electric windings. Plug-in frames which can be adjusted in width and/or height are provided at the ends of the device. Profiled bars and additional supporting members, both of which can be of any desired length, are mounted between the frames at each corner thereof and are laterally spaced so as to space the coil windings wrapped therearound.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: January 31, 1984
    Assignee: Firma W. Meffert KG.
    Inventors: Harald Meffert, Rolf Pieper