US3056940A - Self-aligning coaxial connector - Google Patents

Self-aligning coaxial connector Download PDF

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US3056940A
US3056940A US27954A US2795460A US3056940A US 3056940 A US3056940 A US 3056940A US 27954 A US27954 A US 27954A US 2795460 A US2795460 A US 2795460A US 3056940 A US3056940 A US 3056940A
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sleeve
plug
contact
expansible
coaxial
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US27954A
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Bernard J Winestock
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COLE ELECTRIC CO
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COLE ELECTRIC CO
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40Two-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
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00Two poles

Description

Oct. 2, 1962 a. J. wlNl-:sTocK SELF-ALIGNING COAXIAL CONNECTOR Filed May 9, 1960 M 7 N. l?. m5 m N W M WW 0 Munk/- m d m LQ www@ M n A E A -L m N llllmhNl Mw WN N QQ WN /f 1 A QN J m J W n lr 7 n HW I l N NM NM 3,056,940 SELF-AUGNNG COAXIAL CONNECTOR Bernard J. Winestock, Los Angeles, Calif., assignor to Cole Electric Company, Culver City, Calif., a corporation of California Filed May 9, 1960, Ser. No. 27,954 Claims. (Cl. 339-64) This invention relates to electrical connectors and more specifically involves a coaxial self-aligning connector assembly that may be used under conditions of severe mechanical vibration.
Ordinary coaxial connector terminals must be precisely aligned in order to complete a connection. For this reason the uses for coaxial connectors have been generally limited to situations Where the terminals were manually connected, since an operator could then radially move one terminal (usually the plug) until the parts were properly aligned. It would be practically impossible, however, to employ the ordinary coaxial connectors Where connections are mechanically operated since a slight axial misalignment of parts would prevent the connection from being completed. Inasmuch as an axial misalignment could be produced merely by mechanical vibrations it should be expected that the range of practical use for coaxial connectors has been extremely limited.
One specific application which is contemplated for this invention is in the field of guided missiles where severe mechanical vibrations are prevalent. Experimentation and tests have shown that a coaxial connector as herein described may be satisfactorily employed under even these most extreme conditions of operation.
In brief, this invention in electrical connector assemblies comprises a mating pair of plug and jack terminals for completing a coaxial connection. Both terminals have outer rim surfaces that are embraced by an expansible contactor sleeve to provide an exterior connection. Since the sleeve may be pivoted about the terminals, the connector assembly will correct itself for misalignments of comparatively large magnitude. In addition, an interior terminal connection is completed between a conductive brush member and a conductive receptacle, which are respectively mounted centrally of said plug and jack terminals. The brush member is comprised of a plurality of twisted core wires having radially projecting ends that engage the receptacle when the terminals are mated. The internal connection formed thereby will possess the advantages of providing multiple contacts, high local pressures and low overall forces, while also producing terminal flexibility that will compensate for misalignments between those parts. The individual attributes of the interior and exterior terminal connections cooperate in a unique manner providing a self-aligning coaxial connector that may be constructed to possess superior operational characteristics under extreme conditions of mechanical vibration.
A primary object of this invention, then, is to provide a self-aligning coaxial connector assembly.
Another object is to provide a coaxial connector assembly that will withstand severe vibrational strains without being adversely affected and while maintaining electrical conductivity.
Other objects of this invention will become apparent in View of the following description.
In the drawings forming a part of this application, and in which like reference numerals are used to indicate like parts throughout the same,
FIG. l is a side View of one embodiment of this invention in electrical connectors, showing the plug and jack terminals in a spaced relationship and with interior connections of the plug terminal illustrated by broken lines;
Patented Oct. 2, 1962 'ice FIG. 2 is an enlarged detail view, mostly in section, of the embodiment of FIG. 1 with the plug and jack terminals assembled; and
FIG. 3 is a side view, partly in section, of the embodiment of FIGS. l and 2, illustrating connector relationships which may result from terminal misalignment.
As particularly shown in the drawings, this novel connector assembly is generally comprised of a terminal plug 10 and a terminal jack 11, so designated because of the internal connection formed between terminal contacts 12 and 13. The outer coaxial contacts 14 and 15 are received within an expansible, electrically conductive sleeve 16, thereby forming an electrical coaxial connection.
The terminal plug 10 includes an outer conductive sleeve 20 that terminates in a rounded contact rim 21, forming the outer coaxial contact 14. Sleeve 20 has a hub portion 22 with a collar 23 and a threaded section spaced therefrom. This construction enables the sleeve to be clamped to a base plate 24, with a nut member 25, as shown.
Plug 10 also comprises a conductive brush contact 26 mounted from within sleeve 20 and insulated therefrom by a spacer sleeve 27 and a washer member 28. Brush Contact 26, which forms the inner coaxial Contact 12, comprises an adapter 29 and twisted, resilient core Wires 30 having radially projecting wire members 30a. Each wire 30a forms a point contact with the receptacle of terminal jack 11.
The terminal plug may be connected to a coaxial conductor 31 in the conventional manner shown. The outer conductor member 32 is clamped between a ferrule 33 and a fastening sleeve 34, which in turn is threaded to sleeve 20. The inner conductor member 35 projects axially through an insulation core 36 and may be soldered to the brush adapter 29.
Jack terminal 11 comprises an outer conductive sleeve 40 that has a rounded contact rim 41, forming the outer coaxial contact 15, and includes a hub portion 42 with a collar 43 and a threaded portion spaced therefrom. Sleeve 40 may then be clamped to a base plate 44 by means of a nut member 45.
A conductive receptacle 46 is mounted from within sleeve 40 and is insulated therefrom by a non-conductive spacer sleeve 47 and washer member 48. Receptacle 46 is adapted for receiving the brush contact of terminal plug 10, and is also adapted for being soldered to the central conductor member 49 of a `second coaxial conductor 50. The connection of conductor 50 to the jack terminal is in all other respects similar to that used for joining conductor 31 to the terminal plug. The outer conductor 51 is clamped between a ferrule 52 and a fastening sleeve 53 that is also threaded to sleeve 40, an insulating core 54 separating conductor members 49 and 51.
The expansible electrically conductive sleeve 16 embraces contact rims 21 and 41 with a resilient biasing force provided by a pair of garter springs 60. Sleeve 16 is longitudinally segmented and circumferentially grooved for receiving these garter springs. It will be further observed from FIGS. 2 and 3 that when terminals 10 and 11 are mated, garter spring 60 will apply a biasing force intermediate the respective points of contact between sleeve 16 and the contact rims 21 and 41. This facet of the construction is an important factor in deriving the optimum benefits under conditions of severe mechanical vibrations.
A housing plate 61 is employed for mounting the expansible sleeve 16 to the plug terminal 10. A cavity or slot 62 is formed in plate 61 with a lipped opening 63 on the side remote from plug 10. The peripheral surface that defines the opening 63 confines the sleeve 16 within cavity 62, although allowing limited longitudinal movement of the sleeve and the insertion of sleeve 40 therethrough. The lipped opening is preferably recessed by counterboring to guide the jack sleeve 40 into the opening, thereby facilitating the `connectors operation. Also, the cavity is formed suiciently larger than the diameter of sleeve 16 to allow said sleeve to be freely pivoted about the contact rim 21 with limited universal movement. Housing plate 61 may be attached to the base plate 24 by conventional means such as the threaded screw connections generally indicated by reference 6d.
With an electrical connector of the kind described and illustrated, it will -be apparent, particularly in view of FIG. 3, that a connection can be formed even though the terminal contacts of connectors .10 and 11 may be out of alignment. Since the expansible sleeve 16 can swivel upon the contact rim Z1, the sleeve can assume a position satisfactory for receiving contact rim 4l. Also, inasmuch as the brush contact 26 is flexible, being comprised of resilient wire members, this contact may adapt itself to an axial misalignment of receptacle 46.
In View of the above description, and although only a preferred embodiment of the invention has been illus- Itrated and described, it is to be realized that certain changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the `scope of the attached claims, and each of such changes is contemplated.
Having thus described my invention, what I claim and desire to secure by Letters Patent is:
1. A vibration resistant, self-aligning, coaxial connector assembly, comprising: a terminal jack formed with an outer conductive sleeve terminating in a rounded contact rim, said jack having a conductive receptacle mounted within said sleeve and insulated therefrom; a terminal plug formed with an outer conductive sleeve terminating in a rounded contact rim, said plug having a coaxial contact mounted from within said sleeve and insulated therefrom, said coaxial contact being supported at the end of a resilient stem extending outwardly beyond said plug contact rim and adapted for being received by said receptacle; an expansible electrically conductive sleeve adapted for embracing said rounded contact rims; and means for holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the coaxial con- -tact of said plug.
2. A vibration resistant, self-aligning, coaxial connector assembly, comprising: a terminal jack formed rwith an outer conductive sleeve terminating in a rounded contact rim, said jack having a conductive receptacle mounted within said sleeve and insulated therefrom; a terminal plug formed with an outer conductive sleeve terminating in a rounded contact rim, said plug having a conductive brush resiliently mounted from within said sleeve and insulated therefrom, said brush comprising twisted core wires having radially outward projecting wires and adapted for being received by said receptacle; an expansible electrically conductive sleeve adapted for embracing said rounded contact rims; and means for holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the brush of said plug; whereby said brush wires will flex to assist mating of said terminals.
3. A vibration resistant, self-aligning, coaxial connector assembly, comprising: a terminal jack formed with an outer conductive sleeve terminating in a rounded contact rim, said jack having a conductive receptacle mounted within said sleeve and insulated therefrom; a terminal plug formed with an outer conductive sleeve terminating in la rounded contact rim, said plug having a conductive coaxial contact mounted from within said sleeve and insulated therefrom, said coaxial contact being supported rat the end of a resilient stem extending outwardly beyond said plug contact rim and adapted for being received by said receptacle; an expansible elecltrically conductive sleeve adapted for embracing said rounded contact rims, said expansible sleeve being longitudinally slidable on said contact rims and biased into contraction; and stop means fixed relative to said terminal plug and engageable with said expansible sleeve for limiting the free longitudinal movement thereof, said stop means holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the coaxial contact of said plug.
4. A vibration resistant, self-aligning, coaxial connector assembly, comprising: a terminal jack formed with an outer conductive sleeve terminating in a rounded contact rim, said jack having a conductive receptacle mounted within said sleeve and insulated therefrom; a terminal plug formed with an outer conductive sleeve terminating in a rounded contact rim, said plug having a conductive coaxial contact mounted from within said sleeve and insulated therefrom, said coaxial contact being supported at the end of a resilient stern extending outwardly beyond said plug contact rim and adapted for being received by said receptacle; an expansible electrically conductive sleeve adapted for embracing lsaid rounded contact rims, said expansible sleeve comprising at least two longitudinal lsegments and being longitudinally slidable on said contact rims, spring means for biasing said segments into contraction upon said contact rims; and stop means xed relative to said terminal plug and engageable with said expansible sleeve for limiting the free longitudinal movement thereof, said stop means holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the coaxial contact of said plug.
5. A vibration resistant, self-aligning, coaxial connector assembly, compirsing: a terminal jack formed with an outer conductive sleeve terminating in a rounded contact rim, said jack having a conductive receptacle mounted within Isaid sleeve and insulated therefrom; a terminal plug formed with an outer conductive sleeve terminating in a rounded contact rim, said plug having a conductive brush resiliently mounted from within said sleeve and insulated therefrom, said brush comprising twisted core wires having radially outward projecting wires and adapted for being received by said receptacle; and an expansible electrically conductive sleeve adapted for embracing said rounded contact rims; whereby said brush wires will flex to assist mating of said terminals; an expansible electrically conductive sleeve adapted for embracing said rounded contact rims, said expansible sleeve comprising at least two longitudinal segments and being longitudinally slidable on said contact rims, spring means for biasing said segments into contraction upon said contact rims; and stop means fixed relative to said terminal plug and engageable with Vsaid expansible sleeve for limiting the free longitudinal movement thereof, said stop means holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the brush of said plug.
6. A vibration resistant, self-aligning, coaxial connector assembly, comprising: a terminal jack formed with an outer conductive sleeve terminating in a rounded contact rim, said jack having a conductive receptacle mounted within said sleeve and insulated therefrom; a terminal plug formed with an outer conductive sleeve terminating in a rounded contact rim, said plug having a conductive coaxial contact mounted from within said sleeve and insulated therefrom, said coaxial contact being supported at the end of a laterally resilient stem extending outwardly beyond said plug contact rim and adapted for being received by said receptacle; an expansible electrically conductive `sleeve adapted for embracing said rounded contact rims, said expansible sleeve comprising at least two longitudinal segments and being longitudinally slidable on said contact rims, spring means for biasing said segments into contraction upon said contact rims;
said spring means comprising at least one coil garter spring disposed axially of said expansible sleeve at a position intermediate the respective points of contact between said sleeve and said contact rims, and means for holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the coaxial contact of said plug.
7. A vibration resistant, self-aligning, coaxial connector assembly, comprising: a terminal jack formed with an outer conductive sleeve terminating in a rounded contact rim, said jack having a conductive receptacle mounted within said sleeve and insulated therefrom; a terminal plug formed with an outer conductive sleeve terminating in a rounded contact rim, said plug having a conductive coaxial contact mounted from within said sleeve and insulated therefrom, said coaxial contact being supported at the end of a laterally resilient stem extending outwardly beyond said plug contact rim and adapted for being received by said receptacle; an expansible electrically conductive sleeve adapted for embracing said rounded contact rims, said expansible sleeve comprising at least two longitudinal segments and being longitudinally slidable on said contact rims, spring means for biasing said segments into contraction upon said contact rims, said spring means comprising a pair of coil garter springs disposed axially of said expansible sleeve at positions intermediate the respective points of contact between said sleeve and said contact rims; and stop means xed relative to said terminal plug for limiting the free longitudinal movement of said expansible sleeve such that said spring means will apply a biasing force intermediate said contact rims for all longitudinal positions of said sleeve relative to said terminal jack and plug, said stop means holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the coaxial contact of said plug.
8. A vibration resistant, self-aligning, coaxial connector assembly, comprising: a terminal jack formed with an outer conductive sleeve terminating in a rounded contact rim, lsaid jack having a conductive receptacle mounted within said sleeve and insulated therefrom by a spacer sleeve and a Washer member, said outer conductive sleeve having a hub portion provided with a collar and a threaded section spaced therefrom, a nut member adapted to be threaded upon said hub for fastening said jack to a base plate, said plate being clamped between said collar and said nut member; a terminal plug formed with an outer conductive sleeve terminating in 'a rounded contact rim, Isaid plug having -a conductive coaxial contact mounted from within said sleeve and insulated therefrom by a spacer sleeve and a washer member, said coaxial contact being supported at the end of a laterally resilient stem extending outwardly beyond said plug contact rim and `adapted for being received by said receptacle, said outer conductive sleeve having `a hub portion provided with a collar and a threaded section spaced therefrom, a second nut member adapted to be threaded upon said hub for fastening said plug to a `second base plate, said second plate being clamped between said collar and said nut member; an expansible electrically conductive sleeve adapted lfor embracing said rounded contact rims, said expansible sleeve being longitudinally slidable on said contact rims and biased into contraction; and stop means xed relative to said terminal plug for limiting the free longitudinal movement of said expansible sleeve, said stop means holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the coaxial contact of said plug.
9. A vibration resistant, self-aligning, coaxial connector assembly, comprising: a terminal jack formed with an outer conductive sleeve terminating in a rounded Contact rim, said jack having a conductive receptacle mounted within said sleeve and insulated therefrom by a spacer sleeve and a washer member, said outer conductive sleeve having a hub portion provided with a collar and a threaded section spaced therefrom, a nut me aber adapted to be threaded upon said hub for fastening said jack to a base plate, said plate being clamped between said collar and said nut member; a terminal plug formed with an outer conductive sleeve terminating in a rounded contact rim, said plug having a conductive brush resiliently mounted from within said sleeve and insulated therefrom by a spacer sleeve and a washer member, said outer conductive sleeve having a hub portion provided with a collar and a threaded section spaced therefrom, a second nut member adapted to be threaded upon said hub for fastening said plug to a second base plate, said second plate being clamped between said collar and said nut member; an expansible electrically conductive sleeve adapted for embracing said rounded contact rims, said expansible sleeve being longitudinally slidable on said contact rims and biased into contraction; and a housing plate having a cavity therein for receiving and retaining said expansible sleeve, said housing plate being secured to said second base plate for holding one end of said expansible sleeve into embracement with said plug contact rim, the opposite end projecting angularly beyond the brush of said plug.
10. A vibration resistant, self-aligning, coaxial conhector assembly, comprising: a terminal jack formed With an outer conductive sleeve terminating in a rounded contact rim, said jack having a conductive receptacle mounted within said sleeve and insulated therefrom by a spacer sleeve and a washer member, said outer conductive sleeve having a hub portion provided with a collar and a threaded section spaced therefrom, a nut member adapted to be threaded upon said hub for fastening said jack to a base plate, said plate being clamped between said collar and said nut member; a terminal plug formed with an outer conductive sleeve terminating in a rounded contact rim, said plug having a conductive brush mounted from within said sleeve and insulated therefrom by a spacer sleeve and a washer member, said brush comprising twisted core wires having radially projecting wires and adapted for being received by said receptacle; and an expansible electrically conductive sleeve adapted for embracing said rounded contact rims; whereby said brush Wires will ex to assist mating of said terminals, said outer conductive sleeve having a hub portion provided with a collar and a threaded section spaced therefrom, a second nut member adapted to be threaded upon said hub for fastening said plug to a second base plate, said second plate being clamped between said collar and said nut member; an expansible electrically conductive sleeve adapted for embracing said rounded contact rims, said expansible sleeve being longitudinally slidable on said contact rims and biased into contraction; and a housing plate having a cavity therein for receiving and retaining said expansible sleeve.
References Cited in the file of this patent UNITED STATES PATENTS 1,556,494 Cooper Oct. 6, 1925 1,984,540 Nelson Dec. 18, 1934 2,086,424 Koehler July 6, 1937 2,243,567 Linde May 27, 1941 2,548,457 Wilson Apr. l0, 1951 2,757,351 Klosterman July 31, 1956
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229241A (en) * 1963-12-16 1966-01-11 Itt Electrical connectors for coaxial cable
US3319217A (en) * 1966-02-25 1967-05-09 New Twist Connector Corp Spirally wound pin connector
US3509518A (en) * 1968-03-11 1970-04-28 Mc Graw Edison Co High voltage cable connectors
US3894782A (en) * 1972-06-02 1975-07-15 Arfina Anstalt Finanz Electrical connector mounted on a support plate
US4681385A (en) * 1986-04-11 1987-07-21 Dart Industries Inc. Electrical connector system
US4815986A (en) * 1987-08-14 1989-03-28 Lucas Weinschel, Inc. Self-aligning blind mate connector
US5879177A (en) * 1996-01-24 1999-03-09 Nec Corporation Adapter for connection of coaxial connectors and connection structure for coaxial connectors

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1556494A (en) * 1924-08-22 1925-10-06 Godfrey S Cooper Rifle cleaner
US1984540A (en) * 1933-02-02 1934-12-18 Nelson Axel Connecter
US2086424A (en) * 1934-05-05 1937-07-06 Charles H Koehler Electrical contact device
US2243567A (en) * 1936-12-12 1941-05-27 Gen Electric Electric disconnecting device
US2548457A (en) * 1947-01-10 1951-04-10 Gen Radio Co Coaxial connector for high-frequency transmission lines
US2757351A (en) * 1953-02-04 1956-07-31 American Phenolic Corp Coaxial butt contact connector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1556494A (en) * 1924-08-22 1925-10-06 Godfrey S Cooper Rifle cleaner
US1984540A (en) * 1933-02-02 1934-12-18 Nelson Axel Connecter
US2086424A (en) * 1934-05-05 1937-07-06 Charles H Koehler Electrical contact device
US2243567A (en) * 1936-12-12 1941-05-27 Gen Electric Electric disconnecting device
US2548457A (en) * 1947-01-10 1951-04-10 Gen Radio Co Coaxial connector for high-frequency transmission lines
US2757351A (en) * 1953-02-04 1956-07-31 American Phenolic Corp Coaxial butt contact connector

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229241A (en) * 1963-12-16 1966-01-11 Itt Electrical connectors for coaxial cable
US3319217A (en) * 1966-02-25 1967-05-09 New Twist Connector Corp Spirally wound pin connector
US3509518A (en) * 1968-03-11 1970-04-28 Mc Graw Edison Co High voltage cable connectors
US3894782A (en) * 1972-06-02 1975-07-15 Arfina Anstalt Finanz Electrical connector mounted on a support plate
US4681385A (en) * 1986-04-11 1987-07-21 Dart Industries Inc. Electrical connector system
US4815986A (en) * 1987-08-14 1989-03-28 Lucas Weinschel, Inc. Self-aligning blind mate connector
US5879177A (en) * 1996-01-24 1999-03-09 Nec Corporation Adapter for connection of coaxial connectors and connection structure for coaxial connectors

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