USRE37835E1 - Coil construction - Google Patents

Coil construction Download PDF

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Publication number
USRE37835E1
USRE37835E1 US09/432,184 US43218499A USRE37835E US RE37835 E1 USRE37835 E1 US RE37835E1 US 43218499 A US43218499 A US 43218499A US RE37835 E USRE37835 E US RE37835E
Authority
US
United States
Prior art keywords
coil
separating device
signal separating
windings
winding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/432,184
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English (en)
Inventor
Jerzy Jacek Kropielnicki
Keith Jeremy Twort
Brian Easter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Industries Ltd
Original Assignee
Glass Antennas Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10713622&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=USRE37835(E1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US08/794,852 external-priority patent/US5835066A/en
Application filed by Glass Antennas Technology Ltd filed Critical Glass Antennas Technology Ltd
Priority to US09/432,184 priority Critical patent/USRE37835E1/en
Application granted granted Critical
Publication of USRE37835E1 publication Critical patent/USRE37835E1/en
Assigned to BSH INDUSTRIES LIMITED reassignment BSH INDUSTRIES LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GLASS ANTENNAS TECHNOLOGY LIMITED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H01Q1/1278—Supports; Mounting means for mounting on windscreens in association with heating wires or layers

Definitions

  • This invention relates to a bifilar coil construction.
  • British patents GB 1520030 and GB 1600987 describe signal separating devices which act to isolate the d.c. power supply circuit for the heating element of an electrically heated motor vehicle window from the antenna circuit of a radio receiver or transmitter connected to the heating element, so that the heating element can be used simultaneously for heating purposes and as a radio transmitting or receiving antenna.
  • the described devices use a bifilar coil for signal separation purposes.
  • the two windings of the coil are connected respectively between opposite ends of the heating element and positive and negative terminals of the d.c. power supply circuit, whereby the coil can present a high blocking impedance to radio signals with a low resistance for d.c. currents.
  • Signal separation can therefore be effected in a particularly convenient and efficient manner.
  • bifilar coils are manufactured by machine-winding two side-by-side wires together around a former. This results in two windings which are wound in a common direction, which have a common diameter and axial length, and the turns of which lie axially next to each other.
  • the windings are enclosed within a pot core structure (ferrous ceramic structure) with ends of the windings projecting axially downwardly through openings in the structure for connection purposes.
  • An object of the present invention is to provide a signal separating device having a doublewound coil construction which can be easily and conveniently manufactured, and with which axial bulk can be minimised, even with thicker gauge wires.
  • a signal separating device for use with a motor vehicle window heating element, said device having a pair of first terminals for connection to the heating element, a pair of second terminals for connection with the motor vehicle d.c. power supply for the heating element, an antenna terminal for connection to the antenna circuit of motor vehicle radio transmitting and/or receciving receiving apparatus, and a double wound coil having first and second windings of common direction interposed between the pair of first terminals and the pair of second terminals so as to permit passage of d.c. current from the power supply to the heating element whilst blocking passage of radio signals from the heating element to the d.c.
  • the antenna terminal being connected between the heating element and the double wound coil
  • the windings of the double wound coil being separately formed windings disposed bodily alongside each other and a ferrous core being provided having inner and outer parts respectively within and around the coil structure
  • the separate windings of the double wound coil comprising first and second generally cylindrical windings of different diameters whereby the first winding fits closely within the second winding with the turns of the first winding spaced radially inwardly of the turns of the second winding, said first and second windings having a substantially identical number of turns thereto.
  • the signal separating device may include other components as appropriate for example including capacitors, diodes, chokes, matching circuitry for matching the heating element to the antenna circuit of the radio apparatus, and tuning circuitry to give efficient operation at different frequency bands (am, vhf).
  • the separate windings of the doublewound coil construction of the invention may comprise two cylindrical (or generally cylindrical) windings which are of slightly different diameters so that the first winding can fit closely within the second winding, the turns of the first winding therefore being spaced radially inwardly of the turns of the second winding.
  • a method of manufacturing the signal separating device of the first aspect of the invention wherein a method of manufacturing a signal separating device according to any one of claims 1 to 3 including forming the first winding as a generally cylindrical coil from wire having a transverse dimension of greater than 2 mm, forming the second winding as a separate generally cylindrical coil from the same wire having an internal diameter greater than the external diameter of the coil of the first winding, fitting the first winding within the second winding and placing the double wound coil so formed within a 30 mm pot core having inner and outer parts respectively with and around the coil structure whereby a current carrying capability of between 25 to 35 amps is possible in said windings.
  • the said internal and external diameters are closely similar so that the outer surface of the first winding contacts or is in close proximity to the inner surface of the second winding for maximum space saving.
  • the windings can be formed easily and conveniently, even with thicker gauge wire, especially because the ends of the windings are fed into the adjacent end turns as single wires whereby bends or curves between the ends and the turns can be readily accommodated. Since the winding turns are radially spaced the axial bulk can be kept to a minimum, and the fact that the said bends or curves of the ends occur in single, rather than twin wires can also assist in this respect.
  • the overall coil structure is of generally cylindrical form and it is possible (and preferred) to use a conventional core having inner and outer cylindrical parts, respectively within and around the coil structure, joined by integral end plates.
  • the core may be a pot core and may be formed in two sections which are clamped together by an axially extending clamping device such as a nut and bolt. Appropriate slots may be provided for the connection ends.
  • each winding has final top and bottom turns which terminate in respective bent ends with straight terminal end portions which project alongside the coil in the axial direction of the coil.
  • the bottom said terminal end portion projects downwardly freely away from the coil
  • the top said terminal end portion projects downwardly freely from the coil alongside and spaced from the outer surface thereof.
  • the terminal end portions are spaced circumferentially from each other.
  • At least one of the top and bottom bent ends is stepped sideways so that the top terminal end portions of the two windings are spaced apart from each other, as also are the bottom terminal end portions.
  • the core may have top and bottom radially extending slots through which the top bent ends and the bottom bent ends respectively project.
  • the separate windings may comprise two spiral (or helical) windings disposed one on top of the other. This results in a “flat”, or reduced axial bulk, construction and the ends of the windings can be readily separately turned up or down or otherwise bent to form connections without unduly axially displacing the turn structure of the windings.
  • This embodiment is shown in FIGS. 9a, 9 b and 9 c.
  • the coils are of common diameter and are disposed in contact with each other.
  • FIG. 1 is a simplified diagram of one form of a signal separating device including a bifilar coil construction according to one embodiment of the invention
  • FIG. 2 is a sectional view through the bifilar coil construction on the line A—A of FIG. 4;
  • FIGS. 3 and 4 are views from below and above of the construction of FIG. 2;
  • FIG. 5 is a side view of the outer winding of the coil construction.
  • FIGS. 6 and 7 are views from above and below of the two windings of the coil construction.
  • FIG. 8 is a sectional view on the line B—B of FIG. 6 .
  • FIG. 9 comprises FIGS. 9a (topview), 9 b and 9 c (sectional view of FIG. 9b) depicting the spiral (or helical) windings embodiment of the present invention.
  • the signal separating device shown is for use with a conventional heated rear window of a motor car to enable this to be used as a receiving antenna for a car radio.
  • the device comprises a housed circuit 1 which is fixed close to the heated window 2 e.g. beneath the rear parcel shelf or within the roof lining.
  • the housed circuit 1 has five terminals, 3 , 4 , 5 , 6 , 7 , two of which 3 , 4 are connected to the heating element 2 of the window, another two of which 5 , 6 are connected to d.c. positive and earth of the car d.c. power supply via the usual dash board switch, and the other of which 7 is connected by a shielded cable to the car radio antenna input circuit.
  • the housed circuit 1 includes a bifilar coil 8 having two windings 9 , 10 of common direction or hand which are interposed respectively between d.c. positive and earth and the two ends of the heating element 2 .
  • the antenna terminal 7 is linked to the heating element 2 between the heating element 2 and the bifilar coil construction 8 .
  • Other components for matching, tuning, assistance in isolation, balancing of the signals at the ends of the heating element etc. may be incorporated but are not all shown here.
  • the bifilar coil construction comprises two separate windings 9 , 10 each of say 5 turns of a thick gauge copper wire capable of carrying said 30 amps without overheating and without significant voltage loss due to resistance.
  • Each winding coil 9 , 10 has a bottom turn which terminates in a downwardly bent end 11 , 12 projecting freely away from the coil parallel to its axis.
  • Each coil also has a top turn which terminates in a downwardly bent end 13 , 14 projecting freely from the coil alongside and spaced from the outersurface of the coil parallel to its axis.
  • the inner coil 9 has an outer diameter which is very slightly smaller than the inner diameter of the outer coil 10 .
  • the end 11 of the inner coil is bent directly downwardly whereas the ends 13 , 12 , 14 of the inner and outer coil are stepped to one side before being bent downwardly.
  • the inner coil 9 is fitted within the outer coil 10 so that they are closely in contact with each other.
  • the bottom projecting ends 11 , 12 are alongside each other but are spaced apart due to the above mentioned stepping.
  • a similar arrangement applies to the top projecting ends 13 , 14 .
  • the coils so far described can be readily formed with a conventional winding machine since it is a single wire which is being wound.
  • the ends 11 , 12 , 13 , 14 can be readily bent and fed in to (or fed out of) the associated end turn in a particularly simple and accurate manner, and without requiring undue axial distortion or displacement of the end turn, even with the thick gauge wire.
  • the resulting coil construction 8 has reduced axial bulk due to the radial spacing of the turns of the two windings 9 , 10 and due to the above mentioned reduced displacement of the end turns.
  • the coil construction 8 is accurately shaped and configured and so it can be easily assembled with a conventional pot core, as shown in the drawing.
  • the pot core is formed in two halves 15 , 16 each consisting of an inner hollow cylinder, 17 , an outer hollow cylinder 18 and an end plate 19 . These cylinders 17 , 18 and the end plate 19 are formed integrally in one piece from a ferrous ceramic structure.
  • the core halves 15 , 16 are assembled top and bottom around the coil construction with the radial slots 20 offset to receive the projecting ends 11 , 12 , 13 , 14 .
  • the halves 15 , 16 are clamped in position tightly in contact with each other with a bolt 22 passed through the holes 21 and the inner cylinders 17 and engaging a nut 23 .

Landscapes

  • General Induction Heating (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Details Of Aerials (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
US09/432,184 1992-04-08 1999-11-02 Coil construction Expired - Lifetime USRE37835E1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/432,184 USRE37835E1 (en) 1992-04-08 1999-11-02 Coil construction

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB927620 1992-04-08
GB929207620A GB9207620D0 (en) 1992-04-08 1992-04-08 Coil construction
US08/794,852 US5835066A (en) 1992-04-08 1997-02-05 Coil construction
US09/432,184 USRE37835E1 (en) 1992-04-08 1999-11-02 Coil construction

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US08/794,852 Reissue US5835066A (en) 1992-04-08 1997-02-05 Coil construction

Publications (1)

Publication Number Publication Date
USRE37835E1 true USRE37835E1 (en) 2002-09-10

Family

ID=10713622

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/432,184 Expired - Lifetime USRE37835E1 (en) 1992-04-08 1999-11-02 Coil construction

Country Status (10)

Country Link
US (1) USRE37835E1 (de)
EP (2) EP0805505B1 (de)
JP (1) JP3580813B2 (de)
KR (1) KR100235574B1 (de)
BR (1) BR9306211A (de)
CA (1) CA2133747C (de)
DE (2) DE69333119T2 (de)
GB (2) GB9207620D0 (de)
SG (1) SG44559A1 (de)
WO (1) WO1993021668A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050088357A1 (en) * 2003-10-24 2005-04-28 Medtronic Minimed, Inc. System and method for multiple antennas having a single core
US10374283B2 (en) 2014-06-24 2019-08-06 AGC Inc. Coil for antenna and antenna system
FR3096863A1 (fr) * 2019-05-27 2020-12-04 Psa Automobiles Sa Dispositif de dégivrage de vitre de véhicule automobile, volet de coffre et véhicule automobile équipé dudit dispositif de dégivrage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9207620D0 (en) 1992-04-08 1992-05-27 Glass Antennas Tech Ltd Coil construction
DE19825552A1 (de) * 1998-01-14 1999-07-15 Lindenmeier Heinz Heizfeldantenne auf der Fensterscheibe eines Kraftfahrzeugs als Breitbandantenne für den Längstwellen- bis Dezimeterwellenbereich
ES2289937B1 (es) 2006-07-17 2008-11-01 Tecnoamyn, S.L. Procedimiento para la recogida y transformacion de la sangre en una proteina hidrolizada a partir de sangre de animales de abasto obteniendose proteina hidrilizada de la sangre (phs).

Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU244422A1 (ru) С. Г. Белокопытов Антенна кабелеискателя
US2624004A (en) 1952-05-16 1952-12-30 Wladimir J Polydoroff Ferromagnetic antenna
US2836805A (en) 1956-12-04 1958-05-27 Essex Electronics Electrical winding construction
GB1098527A (en) 1964-04-03 1968-01-10 Siemens Ag Improvements in or relating to transformers for use at working temperatures at which metals become superconductive
GB1123236A (en) 1964-12-30 1968-08-14 Plessey Uk Ltd Improvements relating to pot core assemblies
US3812443A (en) 1973-05-24 1974-05-21 Coilcraft Inc Stapled coil construction
US4063247A (en) 1976-10-07 1977-12-13 Nippon Sheet Glass Co., Ltd. Heater glass sheet with broad band receiver antennae
US4086594A (en) 1975-11-21 1978-04-25 B.S.H. Electronics (Manchester) Limited Electrical signal separating device for combined windshield antenna and heater grid
GB1600987A (en) 1977-08-17 1981-10-21 Bsh Electronics Manchester Ltd Electrical device to enable the heating element of an electrically heated motor vehicle window to be used as a radio transmitting aerial
US4305785A (en) 1980-02-26 1981-12-15 The United States Of America As Represented By The United States Department Of Energy Sensor for detecting changes in magnetic fields
US4439771A (en) 1981-05-15 1984-03-27 Asahi Glass Company, Ltd. Glass antenna system for an automobile
DE3307262A1 (de) 1983-03-02 1984-09-06 Vogt Gmbh & Co Kg, 8391 Erlau Ringkern-entstoerdrossel mit gerichtetem streufeld
US4654669A (en) 1983-12-20 1987-03-31 Bsh Electronics, Ltd. Electrical signal separating device for window antenna having isolating and matching circuitry
EP0269924A2 (de) 1986-11-21 1988-06-08 Harada Industry Co., Ltd. Kompensationsverstärker für eine Autoantenne
US4761826A (en) 1985-03-30 1988-08-02 Bsh Electronics, Ltd. Signal separating device
US4903034A (en) 1983-12-20 1990-02-20 Bsh Electronics, Ltd. Electrical signal separating device having isolating and matching circuitry
US4903035A (en) 1983-12-20 1990-02-20 Bsh Electronics, Ltd. Electrical signal separating device having isolating and matching circuitry
US4928108A (en) 1983-12-20 1990-05-22 Bsh Electronics, Ltd. Electrical signal separating device having isolating and matching circuitry for split passband matching
DE3908350A1 (de) 1989-03-15 1990-09-20 Asea Brown Boveri Elektrische spule
WO1991001575A1 (en) 1989-07-19 1991-02-07 Bsh Industries Limited Signal separating device
GB2266193A (en) 1992-04-08 1993-10-20 Glass Antennas Tech Ltd Bifilar winding arrangement
US5293174A (en) 1987-05-21 1994-03-08 Kropielnicki Jerzy J Vehicle antenna
GB2295729A (en) 1992-04-08 1996-06-05 Glass Antennas Tech Ltd Signal separating device
US5835066A (en) 1992-04-08 1998-11-10 Glass Antennas Technology Limited Coil construction

Patent Citations (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU244422A1 (ru) С. Г. Белокопытов Антенна кабелеискателя
US2624004A (en) 1952-05-16 1952-12-30 Wladimir J Polydoroff Ferromagnetic antenna
US2836805A (en) 1956-12-04 1958-05-27 Essex Electronics Electrical winding construction
GB1098527A (en) 1964-04-03 1968-01-10 Siemens Ag Improvements in or relating to transformers for use at working temperatures at which metals become superconductive
GB1123236A (en) 1964-12-30 1968-08-14 Plessey Uk Ltd Improvements relating to pot core assemblies
US3812443A (en) 1973-05-24 1974-05-21 Coilcraft Inc Stapled coil construction
US4086594A (en) 1975-11-21 1978-04-25 B.S.H. Electronics (Manchester) Limited Electrical signal separating device for combined windshield antenna and heater grid
GB1520030A (en) 1975-11-21 1978-08-02 Bsh Electronics Manchester Ltd Electrical device to enable the heating element of an electrically heated motor vehicle window to be used as a radio aerial
US4063247A (en) 1976-10-07 1977-12-13 Nippon Sheet Glass Co., Ltd. Heater glass sheet with broad band receiver antennae
US4583097A (en) 1977-08-17 1986-04-15 Bsh Electronics (Manchester) Limited Electrical signal separating device
US4422077A (en) 1977-08-17 1983-12-20 B.S.H. Electronics (Manchester) Limited Electrical signal separating device for combined windshield antenna and heater grid
GB1600987A (en) 1977-08-17 1981-10-21 Bsh Electronics Manchester Ltd Electrical device to enable the heating element of an electrically heated motor vehicle window to be used as a radio transmitting aerial
US4305785A (en) 1980-02-26 1981-12-15 The United States Of America As Represented By The United States Department Of Energy Sensor for detecting changes in magnetic fields
US4439771A (en) 1981-05-15 1984-03-27 Asahi Glass Company, Ltd. Glass antenna system for an automobile
DE3307262A1 (de) 1983-03-02 1984-09-06 Vogt Gmbh & Co Kg, 8391 Erlau Ringkern-entstoerdrossel mit gerichtetem streufeld
US4928108A (en) 1983-12-20 1990-05-22 Bsh Electronics, Ltd. Electrical signal separating device having isolating and matching circuitry for split passband matching
US4903034A (en) 1983-12-20 1990-02-20 Bsh Electronics, Ltd. Electrical signal separating device having isolating and matching circuitry
US4903035A (en) 1983-12-20 1990-02-20 Bsh Electronics, Ltd. Electrical signal separating device having isolating and matching circuitry
US4654669A (en) 1983-12-20 1987-03-31 Bsh Electronics, Ltd. Electrical signal separating device for window antenna having isolating and matching circuitry
US4761826A (en) 1985-03-30 1988-08-02 Bsh Electronics, Ltd. Signal separating device
EP0269924A2 (de) 1986-11-21 1988-06-08 Harada Industry Co., Ltd. Kompensationsverstärker für eine Autoantenne
US5293174A (en) 1987-05-21 1994-03-08 Kropielnicki Jerzy J Vehicle antenna
DE3908350A1 (de) 1989-03-15 1990-09-20 Asea Brown Boveri Elektrische spule
WO1991001575A1 (en) 1989-07-19 1991-02-07 Bsh Industries Limited Signal separating device
GB2250137A (en) 1989-07-19 1992-05-27 Bsh Ind Ltd Signal separating device
US5293173A (en) 1989-07-19 1994-03-08 Glass Antennas Technology Limited Signal separating device
GB2266193A (en) 1992-04-08 1993-10-20 Glass Antennas Tech Ltd Bifilar winding arrangement
EP0635165A1 (de) 1992-04-08 1995-01-25 Bsh Industries Limited Spulenstruktur
GB2295729A (en) 1992-04-08 1996-06-05 Glass Antennas Tech Ltd Signal separating device
US5835066A (en) 1992-04-08 1998-11-10 Glass Antennas Technology Limited Coil construction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050088357A1 (en) * 2003-10-24 2005-04-28 Medtronic Minimed, Inc. System and method for multiple antennas having a single core
US7123206B2 (en) * 2003-10-24 2006-10-17 Medtronic Minimed, Inc. System and method for multiple antennas having a single core
US10374283B2 (en) 2014-06-24 2019-08-06 AGC Inc. Coil for antenna and antenna system
FR3096863A1 (fr) * 2019-05-27 2020-12-04 Psa Automobiles Sa Dispositif de dégivrage de vitre de véhicule automobile, volet de coffre et véhicule automobile équipé dudit dispositif de dégivrage

Also Published As

Publication number Publication date
DE69333119D1 (de) 2003-08-28
GB9207620D0 (en) 1992-05-27
JPH07505747A (ja) 1995-06-22
BR9306211A (pt) 1998-06-23
JP3580813B2 (ja) 2004-10-27
GB2266193B (en) 1996-09-25
DE69319724D1 (de) 1998-08-20
EP0805505A3 (de) 1997-11-19
KR100235574B1 (ko) 1999-12-15
KR950701145A (ko) 1995-02-20
EP0805505B1 (de) 2003-07-23
CA2133747A1 (en) 1993-10-28
EP0635165B1 (de) 1998-07-15
DE69333119T2 (de) 2004-05-06
EP0805505A2 (de) 1997-11-05
SG44559A1 (en) 1997-12-19
WO1993021668A1 (en) 1993-10-28
DE69319724T2 (de) 1999-03-18
GB9304928D0 (en) 1993-04-28
GB2266193A (en) 1993-10-20
EP0635165A1 (de) 1995-01-25
CA2133747C (en) 2002-12-24

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