EP0635165A1 - Spulenstruktur - Google Patents
SpulenstrukturInfo
- Publication number
- EP0635165A1 EP0635165A1 EP93905538A EP93905538A EP0635165A1 EP 0635165 A1 EP0635165 A1 EP 0635165A1 EP 93905538 A EP93905538 A EP 93905538A EP 93905538 A EP93905538 A EP 93905538A EP 0635165 A1 EP0635165 A1 EP 0635165A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- winding
- windings
- heating element
- construction according
- 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.)
- Granted
Links
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.
- a pot core structure ferrous ceramic structure
- An axially compact construction is desirable to permit easy mounting at a required position close to the motor vehicle window so as to minimise tuning problems due to lead inductance and capacitance.
- the projecting connection ends of the windings follow a curved or bent path where they feed into the adjacent end turns and, in the case of axially side-by-side thicker gauge wires this adds considerably to the axial bulk and also can be difficult to achieve or control with conventional winding equipment.
- An object of the present invention is to provide a bifilar coil construction which can be easily and conveniently manufactured, and with which axial bulk can be minimised, even with thicker gauge wires.
- a bifilar coil construction comprising first and second windings of common direction characterised in that the windings are separately formed windings disposed bodily alongside each other.
- the bifilar coil construction is particularly suited to use in a signal separating device for use with a motor vehicle window heating element.
- 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 receiving apparatus, and a bifilar coil construction 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. power supply, the antenna terminal being connected between the heating element and the bifilar coil, characterised in that the windings of the bifilar coil construction are separately formed windings disposed bodily alongside each other.
- 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 bifilar 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 bifilar coil construction- of the first aspect of the invention wherein the first winding is formed as a cylindrical (or generally cylindrical) coil, the second winding is formed as a separate cylindrical (or generally cylindrical) coil having an internal diameter greater than the external diameter of the coil of the first winding, and the first winding is fitted within the second winding.
- 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, and the top said terminal end portion projects downwardly freely from the coil alongside and spaced from the outersurface 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.
- a method of manufacturing the bifilar coil construction of the first aspect of the invention wherein the two windings are formed as spiral or helical coils, and said coils are disposed axially one on top of the other.
- the coils are of common diameter and are disposed in contact with each other.
- the resulting coil structure of the fourth aspect of the invention can be provided with a core structure generally of like form to that described above in connection with the third aspect of the present invention, it being understood that the coils have central apertures therein to receive the central part of the core.
- 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; and Fig. 8 is a sectional view on the line B-B of
- 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 piec_e_-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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97111214A EP0805505B1 (de) | 1992-04-08 | 1993-03-08 | Signaltrennungsvorrichtung mit Spulenkonstruktion |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929207620A GB9207620D0 (en) | 1992-04-08 | 1992-04-08 | Coil construction |
GB9207620 | 1992-04-08 | ||
PCT/GB1993/000481 WO1993021668A1 (en) | 1992-04-08 | 1993-03-08 | Coil construction |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97111214A Division EP0805505B1 (de) | 1992-04-08 | 1993-03-08 | Signaltrennungsvorrichtung mit Spulenkonstruktion |
EP97111214.9 Division-Into | 1997-07-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0635165A1 true EP0635165A1 (de) | 1995-01-25 |
EP0635165B1 EP0635165B1 (de) | 1998-07-15 |
Family
ID=10713622
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93905538A Expired - Lifetime EP0635165B1 (de) | 1992-04-08 | 1993-03-08 | Spulenstruktur |
EP97111214A Expired - Lifetime EP0805505B1 (de) | 1992-04-08 | 1993-03-08 | Signaltrennungsvorrichtung mit Spulenkonstruktion |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97111214A Expired - Lifetime EP0805505B1 (de) | 1992-04-08 | 1993-03-08 | Signaltrennungsvorrichtung mit Spulenkonstruktion |
Country Status (10)
Country | Link |
---|---|
US (1) | USRE37835E1 (de) |
EP (2) | EP0635165B1 (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 (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE37835E1 (en) | 1992-04-08 | 2002-09-10 | Glass Antennas Technology Limited | Coil construction |
WO2008009757A1 (es) | 2006-07-17 | 2008-01-24 | Tecnoamyn S.L. | Procedimiento para la recogida y transformación de la sangre en una proteína hidrolizada a partir de sangre de animales de abasto obteniéndose proteína hidrolizada de la sangre (phs) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19825552A1 (de) * | 1998-01-14 | 1999-07-15 | Lindenmeier Heinz | Heizfeldantenne auf der Fensterscheibe eines Kraftfahrzeugs als Breitbandantenne für den Längstwellen- bis Dezimeterwellenbereich |
US7123206B2 (en) * | 2003-10-24 | 2006-10-17 | Medtronic Minimed, Inc. | System and method for multiple antennas having a single core |
EP3147998B1 (de) * | 2014-06-24 | 2020-04-15 | AGC Inc. | Antennenspule und antennensystem |
FR3096863B1 (fr) * | 2019-05-27 | 2021-04-23 | Psa Automobiles Sa | Dispositif de dégivrage de vitre de véhicule automobile, volet de coffre et véhicule automobile équipé dudit dispositif de dégivrage |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE1439358A1 (de) * | 1964-04-03 | 1968-11-28 | Siemens Ag | UEbertrager fuer tiefe Temperaturen |
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 |
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 |
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 |
JPS57188102A (en) | 1981-05-15 | 1982-11-19 | Asahi Glass Co Ltd | Glass antenna for 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 |
US4903035A (en) | 1983-12-20 | 1990-02-20 | Bsh Electronics, Ltd. | Electrical signal separating device having isolating and matching circuitry |
US4903034A (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 |
GB8508402D0 (en) | 1985-03-30 | 1985-05-09 | Bsh Electronics Ltd | Signal separating device |
JPS63131704A (ja) * | 1986-11-21 | 1988-06-03 | Harada Kogyo Kk | ガラスアンテナの補償増幅装置 |
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 |
GB8916524D0 (en) | 1989-07-19 | 1989-09-06 | Bsh Electronics Ltd | Signal separating device |
US5835066A (en) | 1992-04-08 | 1998-11-10 | Glass Antennas Technology Limited | Coil construction |
GB2295729B (en) | 1992-04-08 | 1996-09-25 | Glass Antennas Tech Ltd | Coil construction |
GB9207620D0 (en) | 1992-04-08 | 1992-05-27 | Glass Antennas Tech Ltd | Coil construction |
-
1992
- 1992-04-08 GB GB929207620A patent/GB9207620D0/en active Pending
-
1993
- 1993-03-05 SG SG1996002234A patent/SG44559A1/en unknown
- 1993-03-05 GB GB9304928A patent/GB2266193B/en not_active Expired - Fee Related
- 1993-03-08 JP JP51807393A patent/JP3580813B2/ja not_active Expired - Fee Related
- 1993-03-08 DE DE69333119T patent/DE69333119T2/de not_active Expired - Fee Related
- 1993-03-08 WO PCT/GB1993/000481 patent/WO1993021668A1/en active IP Right Grant
- 1993-03-08 DE DE69319724T patent/DE69319724T2/de not_active Expired - Fee Related
- 1993-03-08 KR KR1019940703572A patent/KR100235574B1/ko not_active IP Right Cessation
- 1993-03-08 CA CA002133747A patent/CA2133747C/en not_active Expired - Fee Related
- 1993-03-08 EP EP93905538A patent/EP0635165B1/de not_active Expired - Lifetime
- 1993-03-08 EP EP97111214A patent/EP0805505B1/de not_active Expired - Lifetime
- 1993-03-08 BR BR9306211A patent/BR9306211A/pt not_active IP Right Cessation
-
1999
- 1999-11-02 US US09/432,184 patent/USRE37835E1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9321668A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE37835E1 (en) | 1992-04-08 | 2002-09-10 | Glass Antennas Technology Limited | Coil construction |
WO2008009757A1 (es) | 2006-07-17 | 2008-01-24 | Tecnoamyn S.L. | Procedimiento para la recogida y transformación de la sangre en una proteína hidrolizada a partir de sangre de animales de abasto obteniéndose proteína hidrolizada de la sangre (phs) |
Also Published As
Publication number | Publication date |
---|---|
DE69333119T2 (de) | 2004-05-06 |
KR100235574B1 (ko) | 1999-12-15 |
CA2133747C (en) | 2002-12-24 |
DE69333119D1 (de) | 2003-08-28 |
KR950701145A (ko) | 1995-02-20 |
EP0805505A3 (de) | 1997-11-19 |
GB9207620D0 (en) | 1992-05-27 |
EP0805505A2 (de) | 1997-11-05 |
USRE37835E1 (en) | 2002-09-10 |
JP3580813B2 (ja) | 2004-10-27 |
DE69319724D1 (de) | 1998-08-20 |
SG44559A1 (en) | 1997-12-19 |
BR9306211A (pt) | 1998-06-23 |
JPH07505747A (ja) | 1995-06-22 |
EP0805505B1 (de) | 2003-07-23 |
WO1993021668A1 (en) | 1993-10-28 |
GB2266193B (en) | 1996-09-25 |
DE69319724T2 (de) | 1999-03-18 |
GB9304928D0 (en) | 1993-04-28 |
CA2133747A1 (en) | 1993-10-28 |
EP0635165B1 (de) | 1998-07-15 |
GB2266193A (en) | 1993-10-20 |
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