EP0014128B1 - Dispositif assurant un contact électrique et thermique entre plusieurs surfaces métalliques, et son utilisation - Google Patents

Dispositif assurant un contact électrique et thermique entre plusieurs surfaces métalliques, et son utilisation Download PDF

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Publication number
EP0014128B1
EP0014128B1 EP80400058A EP80400058A EP0014128B1 EP 0014128 B1 EP0014128 B1 EP 0014128B1 EP 80400058 A EP80400058 A EP 80400058A EP 80400058 A EP80400058 A EP 80400058A EP 0014128 B1 EP0014128 B1 EP 0014128B1
Authority
EP
European Patent Office
Prior art keywords
frame
wire
series
contact
electrical
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
Application number
EP80400058A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0014128A1 (fr
Inventor
Roger Hoet
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.)
Thales SA
Original Assignee
Thomson CSF SA
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
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0014128A1 publication Critical patent/EP0014128A1/fr
Application granted granted Critical
Publication of EP0014128B1 publication Critical patent/EP0014128B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/24—Terminating devices
    • H01P1/28—Short-circuiting plungers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/027—Collectors
    • H01J23/033—Collector cooling devices

Definitions

  • the present invention relates to a device ensuring electrical and thermal contact between several metal surfaces.
  • the contact by spring has, compared to the contact by flexible blades, the advantage of being punctual and not requiring welding, moreover, its ventilation is easy because it consists of wire and not of metal plates.
  • the contact by spring has a great disadvantage which is its brittleness. Indeed, it deteriorates easily, especially during its installation, and in particular the turns do not remain uniformly apart. Contact by spring therefore does not allow, like contact by flexible blades, to make contact between two surfaces subjected to both rotational and translational movements.
  • the present invention relates to a device ensuring electrical and thermal contact between several metal surfaces comprising a metal wire wound substantially in a helix, around a strip-shaped armature, this device being characterized in that the armature comprises two series of means limiting the movement of the wire along the axis of the armature. These two series of means are produced on two opposite edges of the frame. The various metal surfaces are in contact with the metal wire.
  • the device according to the invention like the spring contact known in the prior art, has the advantage of being punctual, of not requiring welding and of being easy to ventilate.
  • the device according to the invention also has, compared to the spring contact, the essential advantage of not being easily deformable because the means which limit the movement of the wire along the axis of the armature maintain a substantially uniform spacing between turns.
  • the device according to the invention can therefore be easily used to make contact between several metal surfaces subjected to both rotational and translational movements.
  • Figures 7 to 14 examples of application of a device ensuring electrical and thermal contact between several metal surfaces according to the invention.
  • Figure 1 shows a perspective view, illustrating a manufacturing process, of a device ensuring electrical and thermal contact between several metal surfaces according to the invention, a metal wire 1 is wound, substantially helically, both around d 'an armature 2, which comprises means limiting the movement of the wire along the axis of the armature 00', which coincides with the axis of the propeller along which the wire is wound, and around two rods 3 arranged parallel to the axis of the reinforcement 00 '.
  • the armature is constituted by a flexible strip and the means limiting the movement of the wire along the axis of the armature are constituted by two series of notches 4 and 5, produced lengthwise, on two opposite edges of the flexible strip constituting the reinforcement.
  • the metal wire 1 is introduced into the notches.
  • the notches of the two series 4 and 5 can face each other, as shown in Figure 1, or not.
  • Figures 2a, b, c, d, e, f show front views of devices ensuring electrical and thermal contact between several metal surfaces according to the invention.
  • the rods 3 are, as in Figure 1, arranged parallel to the axis of the frame 00 ', but their number, their size and their respective position vary.
  • FIG. 2a two rods 3, of different sizes, are arranged symmetrically on either side of the frame, the device obtained is therefore asymmetrical.
  • FIG. 2d four identical rods are arranged on either side of the frame.
  • the rods occupy two by two symmetrical positions relative to the frame and the device is hexagonal.
  • FIG. 2e only one rod is used.
  • FIG. 2f as in FIG. 2d, four identical rods are used and are distributed on either side of the frame.
  • the rods have two by two a symmetrical position relative to the frame and each group of two rods is located at one end of the frame.
  • the device obtained is therefore substantially rectangular. It can also be subjected to a heat or mechanical treatment which gives it a substantially coil shape, as shown in FIG. 2f.
  • the method according to the invention applies regardless of the number of rods 3, it also applies when the wire is wound only around the frame 2, that is to say when no rod is used.
  • the figures represent a front view of an embodiment of a device ensuring electrical and thermal contact between several metal surfaces according to the invention.
  • the reinforcement 2 is constituted by a flexible strip, but the reinforcement shown in FIG. 3 comprises, in the direction of the length, on two opposite edges, two series of slots 8 and 9, perpendicular to the axis of the reinforcement 00 '.
  • the slots of the two series 8 and 9 alternate on the frame.
  • the device shown in Figure 3 can be used flat disc-shaped, the slots of one of the series, the series 8 in Figure 3, overlap, while the slots of the other series, the series 9 in Figure 3, deviate, while the device shown in Figure 1 can only be used wrapped around a cylinder or in the form of a rectangular strip.
  • the means limiting the movement of the wire along the axis of the armature consist of two series of orifices, 6 and 7, drilled on the plate constituting the armature 2, lengthwise.
  • the metal wire 1 is introduced into these orifices.
  • FIG. 4 represents a perspective view of an embodiment of a device ensuring electrical and thermal contact according to the invention.
  • the frame 2 is constituted by a sheet cut out in the form of a ring.
  • Two rods 3 are arranged on either side of the frame, these rods are also in the form of a ring, they are made of plastic or any other material which can be dissolved after winding.
  • the means limiting the movement of the wire along the axis of the frame 00 ' are constituted by corrugations 12, produced on two opposite edges of the plate constituting the frame and along the axis of the frame 00 '.
  • the metal wire is introduced into the concavities 13 of the corrugations.
  • two metal wires 10 and 11 are wound in a helix, so identical, and alternate on the frame.
  • the number of metal wires can be any.
  • FIG. 5 represents a perspective view of another embodiment of a device ensuring electrical and thermal contact between several metallic surfaces according to the invention.
  • the frame 2 is constituted by a wound wire, substantially helical, with contiguous turns.
  • the propellers of the frame and means limiting the movement of the wire can be flattened to limit the overall width of the device.
  • the metal wire 1 ensuring the electrical contact between several metal surfaces is inserted into the space between two consecutive and non-contiguous turns of the propeller 14 constituting the means limiting the movement of the wire.
  • FIG. 6 represents another embodiment of a device ensuring electrical and thermal contact between several metal surfaces according to the invention.
  • a metal wire 23 is wound substantially in a helix both around the frame 2, which is constituted in this example by a flexible strip, and around at least a first rod arranged parallel to the axis of the frame 00 ', this wand is not shown in the figure.
  • Another metallic wire 24 is then wound, substantially in a helix, both around the frame 2 and at least one second rod arranged parallel to the axis of the frame and on the other side of the frame. compared to the first wand.
  • the device obtained has more solidity and makes it possible to prevent the deformations received by the metal wire lying on one side. of the armature are transmitted to the metal wire on the other side of the armature.
  • the device ensuring electrical and thermal contact according to the invention is used in numerous applications, in particular in the field of microwave frequencies.
  • This device is thus used in microwave electronic tubes of coaxial geometry, such as power triodes and tetrodes used by radio and television transmitters, radars and industrial high frequency generators, to ensure electrical contact. and thermal between the surfaces of two coaxial cylinders constituting two connections of a tube.
  • the device can then be housed in a groove hollowed out on the surface of one of the two cylinders. It can also be fixed to the surface of one of the two cylinders, or as shown in FIG.
  • FIG. 7 which is an exploded perspective view
  • lugs 27 provided on the surface 28 which penetrate into orifices 29, oblong, drilled on the frame 2, orthogonally to the axis 00 ′ of the frame, or by lugs 30 cut out on the frame 2, as shown in FIG. 8, which is a perspective view of the frame, these tabs 30 then enter holes provided on the surface of one of the two cylinders.
  • This device can also be used, as shown in FIG. 9, to make electrical contact between two walls 15 and 16 of a microwave coaxial cavity.
  • the device 20 then serves as a piston. It is driven in translation, as shown by a double arrow in Figure 9, by a control rod.
  • FIG. 11 is a perspective view, two devices 20, according to the invention, and mounted in two grooves 31 located on either side of a piston 32.
  • the devices 20 are connected to the piston by their frame 2. It is possible to use to accommodate the devices 20 grooves 31 of rectangular shape, or of triangular shape, as shown in Figure 11.
  • the triangular grooves have the advantage when the devices 20 are substantially diamond-shaped, as shown in Figure 11, to allow very good ventilation of the contacts thanks to the space between each device 20 and the piston 32.
  • the devices 20 are in contact with two sides of the grooves and therefore follow the slightest displacements of the piston 32, which is not the case for the rectangular grooves res with which it is difficult to make a fine adjustment of the position of the piston, because the devices 20 do not ensure good contact with the piston, especially since it is necessary to provide a clearance between the armature and the piston to leave the armature free to change dimensions.
  • the piston is of course movable in translation as shown by a double arrow in FIG. 11.
  • the device according to the invention can be used to make electrical and thermal contact between several metallic surfaces, four metallic surfaces, for example, for the substantially hexagonal device, shown seen from the front in FIG. 12.
  • the four surfaces A, B, C, D are supported on the sides a, b, c, d, of the hexagon, these surfaces A, B, C, D, can be animated or not rotational elements.
  • the device according to the invention can be housed, as shown in FIG. 13, in a helical groove 21 provided on the surface of one of the two parts between which the device 20 provides electrical and thermal contact.
  • This groove 21 makes it possible to increase the surface of the contact produced by the device 20 between the two parts 18 and 19.
  • the part 19 comprises cooling fins 22.
  • the device 20 shown in FIG. 13 ensures contact between parts 18 and 19 which can be subjected to both rotational and translational movements.
  • a current of 200 amperes is established between parts 25 and 26, which are made of brass.
  • the recorded voltage drop is only 28 millivolts, whereas it would be at least 50 millivolts if the contact between the metal surfaces of parts 25 and 26 was established by devices according to the prior art.
  • the temperature of the rooms 25 and 26 does not exceed 40 degrees Celsius, because the device according to the invention allows good ventilation to be easily achieved.

Landscapes

  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacture Of Switches (AREA)
EP80400058A 1979-01-30 1980-01-15 Dispositif assurant un contact électrique et thermique entre plusieurs surfaces métalliques, et son utilisation Expired EP0014128B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7902282 1979-01-30
FR7902282A FR2448221A1 (fr) 1979-01-30 1979-01-30 Procede de fabrication d'un dispositif assurant un contact electrique et thermique entre plusieurs surfaces metalliques, dispositif obtenu par ce procede et application de ce dispositif

Publications (2)

Publication Number Publication Date
EP0014128A1 EP0014128A1 (fr) 1980-08-06
EP0014128B1 true EP0014128B1 (fr) 1984-03-21

Family

ID=9221339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400058A Expired EP0014128B1 (fr) 1979-01-30 1980-01-15 Dispositif assurant un contact électrique et thermique entre plusieurs surfaces métalliques, et son utilisation

Country Status (4)

Country Link
US (1) US4488086A (US06168655-20010102-C00055.png)
EP (1) EP0014128B1 (US06168655-20010102-C00055.png)
DE (1) DE3067076D1 (US06168655-20010102-C00055.png)
FR (1) FR2448221A1 (US06168655-20010102-C00055.png)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2379047A (en) * 1942-05-01 1945-06-26 Bell Telephone Labor Inc Bridging conductor
US2829352A (en) * 1953-12-24 1958-04-01 Varian Associates Tunable waveguide short
US2932806A (en) * 1958-12-02 1960-04-12 Bomac Lab Inc Broadband microwave window
US3255426A (en) * 1964-03-09 1966-06-07 Jesse L Butler Stripline having two ground planes mechanically spaced by removable longitudinal electrical connectors disposed parallel to signal conductor
US3614518A (en) * 1970-03-16 1971-10-19 Varian Associates Microwave tuner having sliding contactors
JPS5544404Y2 (US06168655-20010102-C00055.png) * 1974-05-09 1980-10-18

Also Published As

Publication number Publication date
US4488086A (en) 1984-12-11
DE3067076D1 (en) 1984-04-26
FR2448221B1 (US06168655-20010102-C00055.png) 1982-04-30
EP0014128A1 (fr) 1980-08-06
FR2448221A1 (fr) 1980-08-29

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