US2446706A - Plug and socket joint suitable for electrical conductors carrying high-frequency currents - Google Patents

Plug and socket joint suitable for electrical conductors carrying high-frequency currents Download PDF

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Publication number
US2446706A
US2446706A US544198A US54419844A US2446706A US 2446706 A US2446706 A US 2446706A US 544198 A US544198 A US 544198A US 54419844 A US54419844 A US 54419844A US 2446706 A US2446706 A US 2446706A
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United States
Prior art keywords
conductor
plug
conductors
contact
contact element
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Expired - Lifetime
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US544198A
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English (en)
Inventor
Latimer Kenneth Eric
Smith Stanley Carlos
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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Publication date
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Publication of US2446706A publication Critical patent/US2446706A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/56—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency specially adapted to a specific shape of cables, e.g. corrugated cables, twisted pair cables, cables with two screens or hollow cables
    • H01R24/566—Hollow cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2105/00—Three poles

Definitions

  • the present invention relates to plug and socket joints suitable for electrical conductors carrying high frequency currents and is particularly applicable to hollow conductors arranged to have current flow in the skins represented by both their inner and outer surfaces.
  • triple coaxial transmission lines which under certain circumstances may also be referred to as resonators, i. e. when they are fairly short and standing waves are set up within them.
  • resonators i. e. when they are fairly short and standing waves are set up within them.
  • the advantages of such lines become increasingly apparent at high frequencies in which case two entirely independent circuits may be set up. namely between the centre conductor and the intermediate conductor, and between the intermediate conductor and the outer conductor. these two circuits having negligible coupling between each other, owing to the fact that ithe'currents are confined to the skin of the conductors.
  • Such circuits are also favourable in cases where a direct connection between a transmission line or resonator and valve is desired, for the'circuits to the cathode, grid and plate may often be arranged conveniently in the form of a triple coaxial structure.
  • the surface of the conductors must be clean and if possible highly polished, in order to reduce the losses, for when considerable skin. effect is present a layer of tarnish may form an appreciable proportion of the current-carrying skin.
  • Silver is the ideal material for the skins of the conductors but it needs periodic cleaning to avoid tarnish due to silver sulphide, etc.
  • the chief object of the invention is to facilitate the making of easily demountable assemblies of equipment such as triple coaxial transmission lines or resonators without introducing appreciable losses at the-junction between two demountable parts of the same conductor.
  • a plug and sock t type of joint of known type is suitable when only low frequencies are involved or when high frequency currents are to be conducted on one side only of the conductor, e. g. on the inner side of the outer conductor, or the outer side of the inner conductor.
  • an improved type of plug and socket joint in which two separate groups of resilient contact members are arranged to complete independent contact paths over the inner and outer surfaces'of a hollow conductor.
  • the invention is applicable with particular advantage for connecting consecutive sections of a metal shell whose inner and outer surfaces act as boundary surfaces forming guides for electromagnetic waves propagated in the spaces respectively inside and outside the shell; in this case 'one group of contact members carry currents flowing on the outside of the shell and the other group carry currents flowing on the inside of the shell, neither system of currents having to traverse the crevice formed by the metal contact members.
  • the contact members are utilised at a joint in the intermediate conductors of a triple coaxial sytsem
  • Fig. 1 being a longitudinal section through the complete assembly and Fig. 2 showing only the left hand member of the intermediate conductor of Fig. 1.
  • the triple coaxial system shown consists of a central rod l, a coaxial cylindrical intermediate conductor 2 and an outer cylindrical conductor 3.
  • Such a system may be used as a transmission line or as a resonator, and in both uses the intermediate conductor carries or guides currents at both inner and outer surfaces.
  • the intermediate conductor 2 is shown as connected to a further cylindrical conductor 1 which may be a simple continuation of the conductor 2 or may constitute the means for connection to another component of a transmission or resonant system, c. g. one of the terminals of a valve.
  • the spring fingers 4 which are sep-- arated by gaps I-2 are integral with the conductor 2 and their outer faces lie in a cylindrical surface contiguous with the outer surface of the conductor 2. In the radial direction the fingers are of 3 smaller dimension than the conductor 2 so that a shoulder 6 is formed. At their free ends, the fingers 4 are provided with inwardly directed projections 5 forming a divided internal collar.
  • the spring fingers 8 which are separated by gaps l3 are integral with the conductor I and their inner faces lie on the continuation of the internal cylindrical surface of the conductor I.
  • the fingers 8 are provided with outwardly directed projections 9 forming a divided external collar adapted to engage the inner surface of the conductor 2. Between the main part of the conductor l and the fingers 8 is an annular portion forming a shoulder i which is engaged by the projections on the fingers 4. A further shoulder II on the conductor 1 serves as an end stop for the fingers 4. p
  • the outer surface of the fingers 4 carries the outer currents and the inner surface of the fingers 8 carries the inside currents, and neither system of currents has to traverse the crevice formed by the contact members.
  • the projections 5 and 8 at the ends of the fingers 4 and 8 ensure a wiping action during the making and breaking of the joint without introducing undue wear and without affecting the polish on the current-carrying surfaces.
  • connections for the inner and outer conductors i and 3 of the triple co-axial conductor may be of conventional type and are not shown.
  • the contact faces between shoulder 8 and projections 9 on the one hand and between shoulder Ill and projections 5 on the other hand may be furnished with co-operating protuberances and depressions so that the two parts will click together.
  • the two sets of spring fingers may both be provided on the same component, one set (corresponding to fingers 4) co-operating with the outer surface of the other component and the other set (corresponding to the fingers I) co-operating with the inner surface of the other component,
  • a metal plug and socket connector for connecting intermediate tubular conductors of two three-conductor high frequency liries in which the intermediate and the outer conductors surround the inner conductor, whereby the electric current of the field between the outer conductor and the intermediate conductor and the current of the field between the intermediate conductor and the inner conductor may each respectively travel along a substantially continuous surface path without having to traverse a crevice formed by the metal elements of the plug-and-socket connector, said connector comprising a tubular contact element adapted to be connected to one of said conductors and a second contact element adapted to be connected to the other conductor. the second element extending into said first contact element and having an end portion in contact with the inner surface of the first element. said first contact element having its end portion in contact with the outer surface of said second contact element and the adjacent surfaces of said 4 elements between said contact end portions being spaced apart to provide two separate series electrical current paths along the inner and the outer surfaces of said connector elements.
  • a metal plug and socket connector for connecting intermediate tubular conductors of two three-conductor high frequency lines in which the intermediate and the outer conductors surround the inner conductor, whereby the electric current of the field between the outer conductor and the intermediate conductor and the current of the field between the intermediate conductor and the inner conductor may each respectively travel along a substantially continuous surface path without having to traverse a crevice formed by-the metal elements of the plug-and-socket connector, said connector comprising a tubular contact element adapted to be connected to one of said conductors and a second contact element adapted to be connected to the other conductor, the second element extendinginto said first contact element and having an end portion in contact with the inner surface of the first element, said first contact element having, an inwardly projecting end portion in contact with the outer surface of said second contact element and the adjacent surfaces of said elements between said contact end portions being spaced apart to provide two separate series electrical current paths along the inner and the outer surfaces of said connector elements.
  • a metal plug and socket connector for connecting intermediate tubular conductors of two three-conductor high frequency lines in which the intermediate and the outer conductors surround the inner conductor, whereby the electric current of the field between the outer conductor and the intermediate conductor and the current of the field between the intermediate conductor and the inner conductor may each respectively travel along a substantially continuous surface path without having to traverse a crevice formed by the metal elements of the *plug-and-socket connector, said connector comprising a tubular contact element adapted to be connected to one of said conductors and a, second contact element adapted'to be connected to the other conductor and extending into said first contact element and having an end portion in contact with the inner surface of the first element, said first contact element consisting of a group of cylindrically disposed finger segments spaced apart and having radially inwardly projecting end portions in contact with the outer surface of said second contact element and the adjacent inner peripheral surfaces of said elements between said contact portions being spaced apart to provide two separate electrical current paths along the inner and outer surfaces of said connector
  • a metal plug and socket connector for connecting intermediate tubular conductors of two three-conductor high frequency lines in which the intermediate and the outer conductors surround the inner conductor, whereby the electric current of the field between the outer conductor and the intermediate conductor and the current of the field between the intermediate conductor and the inner conductor may each respectively travel along a substantially continuous surface path without having to traverse a crevice formed by the metal elements of the plugand-socket connectonsaid connector comprising a tubular contact element adapted to be'connected to one of said conductors and a second con; tact element adapted to be connected to the other 2,44enoe conductor and extending into said first contact element and having an outwardly projecting end portion in contact with the inner surface of the first element, said first contact element having an inwardly projecting end portion in contact with the outer surface of said second contact element, said inwardly projecting end portions and said outwardly projecting end portions overlapping and being separated by an annular space between adjacently positioned surfaces of said elements to provide two separate electrical
  • a metal plug and socket connector for connecting intermediate tubular conductors of two three-conductor high frequency lines in which the intermediate and the outer conductors surround the inner conductor, whereby the electric current of the field between the outer conductor and the intermediate conductor and the current of the field between the intermediate conductor and the inner conductor may each respectively travel along a substantially continuous surface path without having to traverse a crevice formed by the metal elements of the plug-and-socket connector, said connector comprising a tubular contact element adapted to be connected to one of said conductors and a second contact element adapted to be connected to the other conductor and consisting of a group of finger segments cylindrically disposed and spaced apart the second element extending into said first contact element and having outwardly projecting end portions in contact with the inner surface of the first element, said first contact element also consisting of a group of finger segments cylindrically disposed and spaced apart and having inwardly projecting end portions, said inwardly projecting end portions of the first connector element and said outwardly projecting end portion-s
  • a metal plug and socket connector for connecting intermediate tubular conductors of two three-conductor high frequency lines in which spaced relation at the free ends thereof, said the intermediate and outer conductor surround the inner conductor, whereby the electric current of the field between the outer conductor and the intermediate conductor and the current of the field between the intermediate conductor and the inner conductor may each respectively traverse along a substantially continuous surface path without having to traverse a crevice formed by the metal elements of the plug and socket connector, said connector comprising a tubular contact element adapted to be connected to one of said conductors and a second contact element adapted to be connected to the other conductor, said second contact element comprising a group of finger segments having at one end thereof outwardly projecting portions to make contact with the inside surface of the first contact element, said second contact element also having a base portion to which said finger elements are secured in cylindrical base portion having a smaller diameter than the outer surface of the second member and forming therewith an outwardly directed shoulder, said first contact element comprising a group of finger segments having at one end thereof

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  • Coupling Device And Connection With Printed Circuit (AREA)
US544198A 1943-02-25 1944-07-10 Plug and socket joint suitable for electrical conductors carrying high-frequency currents Expired - Lifetime US2446706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3115/43A GB565149A (en) 1943-02-25 1943-02-25 Improvements in plug and socket joints suitable for electrical conductors carrying high frequency currents

Publications (1)

Publication Number Publication Date
US2446706A true US2446706A (en) 1948-08-10

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ID=9752196

Family Applications (1)

Application Number Title Priority Date Filing Date
US544198A Expired - Lifetime US2446706A (en) 1943-02-25 1944-07-10 Plug and socket joint suitable for electrical conductors carrying high-frequency currents

Country Status (3)

Country Link
US (1) US2446706A (xx)
FR (1) FR957425A (xx)
GB (1) GB565149A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615949A (en) * 1947-04-30 1952-10-28 Rca Corp Coaxial socket contact
US2838740A (en) * 1954-07-12 1958-06-10 Larky Norbert David Heat exchanging connector
US3022482A (en) * 1956-06-12 1962-02-20 Bird Electronic Corp Coaxial line transition section and method of making same
US20160344125A1 (en) * 2014-01-28 2016-11-24 Wolfgang B. Thörner Method for Producing a Contact Element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US868460A (en) * 1905-08-10 1907-10-15 Gustave L Hoest Coupling for electric cables.
US2152504A (en) * 1935-07-08 1939-03-28 Western Electric Co Coaxial cable terminal
US2238319A (en) * 1940-07-12 1941-04-15 Picker X Ray Corp Cable contact
US2351520A (en) * 1940-09-12 1944-06-13 Rca Corp Transmission line

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US868460A (en) * 1905-08-10 1907-10-15 Gustave L Hoest Coupling for electric cables.
US2152504A (en) * 1935-07-08 1939-03-28 Western Electric Co Coaxial cable terminal
US2238319A (en) * 1940-07-12 1941-04-15 Picker X Ray Corp Cable contact
US2351520A (en) * 1940-09-12 1944-06-13 Rca Corp Transmission line

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615949A (en) * 1947-04-30 1952-10-28 Rca Corp Coaxial socket contact
US2838740A (en) * 1954-07-12 1958-06-10 Larky Norbert David Heat exchanging connector
US3022482A (en) * 1956-06-12 1962-02-20 Bird Electronic Corp Coaxial line transition section and method of making same
US20160344125A1 (en) * 2014-01-28 2016-11-24 Wolfgang B. Thörner Method for Producing a Contact Element
US10965048B2 (en) * 2014-01-28 2021-03-30 Wolfgang B. Thorner Method for producing a contact element

Also Published As

Publication number Publication date
FR957425A (xx) 1950-02-20
GB565149A (en) 1944-10-30

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