US3097033A

US3097033A - Universal electric connector

Info

Publication number: US3097033A
Application number: US791891A
Authority: US
Inventors: Gordon P Felts
Original assignee: Microdot Inc
Current assignee: Microdot Inc
Priority date: 1959-02-09
Filing date: 1959-02-09
Publication date: 1963-07-09
Anticipated expiration: 1980-07-09

Description

July 9, 1963 G. P. FELTs 3,097,033

UNIVERSAL ELECTRIC CONNECTOR Filed Feb. 9, 1959 :f1.5 i 4 L- F/ '-5-' INVENTOR, 6am/an Fel/s,

46m/umu United States Patent O 3,097,033 UNIVERSAL ELECTRIC CONNECTOR Gordon P. Felts, Palm Springs, Calif., assigner to Microdot Inc., South Pasadena, Calif., a corporation of California Filed Feb. 9, 1959, Ser. No. 791,891 13 Claims. (Cl. 339-75) The present invention relates generally to electrical connectors for conductors, primarily for coaxial cables, and is more particularly concerned with connectors of the miniature type having universal application in that it may be utilized as a quick pushpull connector, a sealed weatherproof connector, or a connector in which the parts are interlocked in connected relation.

To such end, the present invention has for one object a more economical construction than in conventional arrangements, wherein the only soldering required is prior to assembly. After soldering the contact members to the conductors of the cable, the parts may be assembled i-n-to cooperative .relationship without further soldering.

A further object resides in the provision of a connector for coaxial cable which requires no special lcools for assembly.

Still another object is to provide a ferrule construction which may be selectively adapted for use with coaxial cables having a single inner conductor or a plurality of inner conductors, thus making it unnecessary to produce sleeves which are respectively constructed and molded in place to accommodate a predetermined number of conductors.

Still another important object is to provide a unique arrangement in which the contacts of the connector may be moisture sealed.

Further objects of the invention will be brought out in the following part of the specification, wherein detailed description is for the purpose of fully disclosing the invention without placing limitations thereon.

Referring to the accompanying drawings, which are for illustrative purposes only:

FIG. l is a view in longitudinal section of an electrical connector -embodying the features of the present invention, the connector parts being in connected relation and locked against separation;

FIG. 2 is an enlarged fragmentary detailed view showing the details of the connected end of the connector sheath, prior to assembly;

FIGS. 3, 4 and 5 are transverse views schematically illustrating the manner in which the connector may be adapted for a coaxial cable having a single inner conductor or a plurality `of inner conductors; and

FIG. 6 is a fragmentary view showing a modiiied construction.

Referring now more specifically to the drawings, for illustrative purposes, the electrical connector of the present invention is disclosed as of the two-part type, wherein mating connectors, usually of a male and female type, are adapted for endwise axial movement into connected telescoped relation and separated non-telescoped relation.

More speciiically, referring to FIG. l, the connector is shown as comprising a part as generally indicated at A, and a part as generally indicated at B, which will now be described in detail.

lCe

F-or purposes of detailed consideration, lthe part A has been illustrated as comprising the female, or receptacle part, While the part B has been illustrated as comprising the male, or plug part of the connector. The part A is associated with a coaxial cable 10 having an outer conductor sheath 11, and a plurality of inner conductors, in this case inner conductors I12 and y13, which are respectively contained within insulating sleeves v14. Prior to assembly of the connector, the sheath 11 is removed from an end portion of the coaxial cable so as to leave projecting insulating sleeves containing the inner conductors. Endmost portions of the insulating sleeves are then removed to provide and expose the ends of the inner conductors. T-hese bare ends are respectively soldered to contact members 15, in each case. This is the only soldering required, since further assembly of the connector may be accomplished without the need of special tools, or further soldering.

An anchor ring 16 is now engaged around the exposed portion of the outer conducting sheath. 'Ihis anchor ring is of split construction and has a plurality of axially extending ngers 17 which may be flexed under pressure into engagement with the conducting sheath.

Provision is made f-or connecting the conducting sheath 1.1 and the anchor ring 16 with a tubular ferrule of suitable rnetal, such as brass, and which may be silver plated, this ferrule being generally indicated by the numeral 18. The -ferrule is constructed with a tubular body portion 19 intermediate its ends, one end of this body portion being extended to provide axially extending circumferentially spaced arms 20, as shown in FIG. 2. Each of these arms at its outermost end terminates in a head portion 21 having an inwardly spaced radial shoulder 22.

Referring again to FIG. 1, the body portion 19` is provided with an integrally formed transversely extending wall 23 which is initially of solid construction, but which may be readily adapted for coaxial cables having one, two, three or four inner conductors by the simple expedient of drilling or otherwise forming the required number of passages 24 therethrough, as schematically illustrated in FIGS. 3, 4 and 5. In the embodyment illustrated in FIG. l, the connector is arranged to be utilized with a coaxial cable having two inner conductors, and for this reason, the wall 23 is illustrated as being provided with two through passages 24.

Each cont-act member l5 is now insulated by being inserted endwise into a tubular sleeve 25 of insulating material, this sleeve having an enlarged end portion 26 which is adapted to extend over the end insulation 14 of the inner conductor. The contact member 15 and insulator lsleeve have circumferential outer and inner abutment shoulders 26 and 27 which act to relatively position the assembled parts and limit the axial movement of the conducting element in a righthand direct-ion within the insulating sleeve, as viewed in FIG. l. The insulating sleeve is positionable within a pas-sage 24, and has a circumferentially extending outer -shoulder 28 which is adapted to abut the adjacent face of the wall 23 and limit further movement of the insulating sleeve in a righthand direction as viewed in FIG. l. With the insulating sleeve thus inserted, it will be .observed that its other end extends past the opposite face of the wall 23, and encases socket connector elements 29 carried by the contact member 15.

During ,the positioning of the sleeves 25 in the wall 23, the previously assembled anchor ring 16 will be axially moved to a position under the innermost ends of the arms 20, it being noted that strands of the outer sheath are folded back over the inner end of the anchor ring so as to have portions thereof positioned between adjacent surfaces of the anchor ring Iand tubular ferrule.

With the parts assembled as explained above, they are now secured in position by deflecting the outermost ends of the arms radially inwardly towards the youter periphery of the coaxial cable. The arms are secured against-the outer surface of the cable by means of a C- ring 30, this ring being retained in position by the action of the radial shoulders 22 on the arms 20. As shown in FIG. 1, it.will.bel observed that deection of the arms produces bend portions 31 between the C-ring 30, and the adjacentend of the anchor ring 16, which act as -camming-fsurfaces to forcev the axially extending iingers 17-fof/the anchor ring 16 into clamped contact relation with the outer conducting sheath 11 of the coaxial cable, thus ,providing 4good velect-rical connection between the sheath and the ferrule.

`On theothersideof the wall 23, as shown in FIG. 1, the body portion 19 comprises a tubular extension 32 .Whichsurrounds .and encases the projecting ends of the insulating sleeves 25. Surrounding the tubular extension `32;'and solderedwor otherwise bonded thereto adjacent a cireumferentially extending iiange 33 is a ring member 34 having a plurality of integrally formed elongate springl-ike `fingers 35 which are` spaced apart circumfer- Eentially around the tubular extension with outermost -endstextending therebeyond and being provided with headportions 36in each case. Each head portion 36 has a rounded innerssurface 37, and on its outer surface has a ,groove 38 inwardly spaced from its outer end.

The mating partB ofthe connector of this invention isqalsofshowniniFIG. 1, andcomprises a tubular sleeve .39ofconductng material, this sleeve having an inner transverse-wall 40 intermediate its end. This sleeve on oneA side of the `wall 40.,is formed to provide a tubular extension 41zwhich is adapted to telescopically seat withinthe, tubular extension 32 of part A, when parts A and B .areinterconnected As in the case of the wall 23, of part A, the wall 40of part B is similarly provided with passages 42, the number of` these passages depending upon the number of;inner conductors of the coaxial cable .to be interconnected. IIn the illustrated arrangement, thereare. twopassagesto accommodate two conductor elements 43 and 44 respectively. These conducting elements are, each insulatingly supported within an insulating :sleeve 45 whichiterminates at the end within exten- `sion,41,in anenlarged `tubular-end portion 46 adapted to receive the `adjacent end of insulating sleeve of part Aa thereinintelescoping relation to provide a long leak- `age path around the connected conducting elements.

The conductor element is formed at one end with a plug portion 47 for making mating engagement with the socket `connector elements 29, when parts A and B are interconnected. yIn the interco-nnected relationship of parts A and B, the rounded inner surfaces 37 of the lingers 35 .are adapted to seat in a lcircumferentially extending groove 48 in the outer surface `of the tubular sleeve 39,

.tothus releasably retain the parts A and B in interconnected relation. With the parts thus described, a quick push-pull connector is provided, which is releasably iatched in connected position, but which may be readily disconnected by the application of a pulling force.

A bend relief 49 of suitable material, such as rubber, neoprene, or the like, is formed at one end so as to grippingly surround and engage the outer surface of the coaxial cable and receive the C-ring and adjacent end of the tubular ferrule 18 within an interior cavity 50 thereof. The inner end of the bend relief has its outer diameter increased in its end portion 51 which abuts the iiange 33.

Associated with the end portion 51 is a tubular sleeve 52 of `suitable material, such as rubber, neoprene, or the like. This sleeve has an internal liange 53 which is in sliding gripping relation with the exterior surface of the ring 34 and its associated lingers 35. One end of the tubular sleeve is in gripped sliding relation with the end portion 51, while the other end of the Isleeve extends over the head portions 36 of the ngers 35 and is formed with an inturned end flange 54- which is adapted to seat in a circumferential `groove 55 of the tubular sleeve and make sealing engagement therewith when the parts A and B are in interconnected relation. Moreover, the sleeve 52 bears against the head portions 36 of the fingers 35 and biases the fingers radially inwardly in their latching position in the groove 48 of the sleeve 39.

Provision is made `for locking the parts A and B in connected position, -by providing an inner metallic ring 55 in the tubular sleeve 52, this ring being so positioned that it .may be axially moved into and out of the grooves 33 of the fingers. When the edge of ring 55 is positioned in the grooves 38, the fingers are held against radial outward movement, thus acting to lock the parts A and B in connected position. However, by axial sliding movement of the tubular :sleeve 5-2 to a position, wherein the ring 55 is disengaged with respect to the `grooves 38, the fingers are free to move radially outwardly and release parts A and B for separation.

The structure described above therefore makes provision `for sealing the contact elements in the connectors against external moisture, as well as provides for llocking the parts A and B in connected relation, but enables release thereof when desired.

Referring nowA to FIG. 6, the bend relief is shown as being modified by integrally forming a tubularsleeve 52 thereon, this sleeve portion having the ring SSinternally mounted as in the previously described arrangement. However, inthis arrangementmovement of the ring 55 to release position is accomplished by flexingthe portion 52 by pulling thereon to form abuckled portion, as indicated by phantom lines at 56. With this arrangement, when the pull is released, the` ring will automatically move back to locking position.

Various modifications may suggest themselves to those skilled in the art without departing from the spirit of my invention, and, I do not wish to be restricted to the specific form shown or uses as mentioned, except to the extent indicated in the appended claims.

I claim:

1. In an electric connector for a coaxial cable having an inner conductor and an outer conducting sheath, a clamp ring engaging said outer sheath, said ring having a greater outer diameter than the outer diameter of said cable, a conducting tubular ferrule having axially extending circumferentially spaced arms at one end surrounding said ring at their inner ends, and having their outer end margins deflected inwardly over said clamping ring to the outer surface of said cable, a C-ring clamped around and restraining said deiiected ends, and a contact member insulatingly supported Within the other end of said ferrule, said contact member having electrical connection with said inner conductor.

2. In an electric connector for a coaxial cable having a plurality of insulated inner conductors and an outer conducting sheath, a clamp ring engaging said outer sheath, said ring having a greater outerdiameter than the outer diameter of said cable, a conducting tubular ferrule having axially extending circumferentially spacedarms at one end surrounding said ring at their inner ends, and having their outer end margins deflected inwardly over said clamping ring to the outer surface of said cable, a C-ring clamped around and retaining said deflected ends, and a plurality of contact members insulatingly supported within the other end of said ferrule, said contact members respectively having electrical connection with said inner conductors.

3. In combination in an electrical connector for use with a cable having an inner conductor, an outer conductive braid, first insulating material between the inner conductor and the outer braid and second insulating material surrounding the braid, a clamping ring disposed on an exposed portion of the braid and provided with a plurality of lingers at one end for disposition in clamping relationship to the braid, a ferrule made from a conductive material for electrical coupling to the braid and disposed on the clamping ring for retaining the exposed portion of the braid between the clamping ring and the ferrule and provided with a plurality of fingers for disposition over the fingers on the clamping ring to clamp the fingers on the clamping ring against the braid, the fingers on the ferrule being provided with reduced dimensions at their ends for disposition in clamping relationship to the second insulating material, and a ring disposed on the fingers of the ferrule at the ends of the fingers to clamp the fingers of the ferrule against the second insulating material and the fingers on the clamping ring against the braid.

4.ln combination in an electrical connector for use with a cable having an inner conductor, an outer conductive braid and insulating material between the inner conductor and the outer braid, a clamping ring disposed on the braid and provided with a configuration to exert a clamping relationship on the braid, a ferrule made from a conductive material and disposed on the clamping ring at a first position and disposed on the braid at a second position removed from the first position and provided with a configuration to exert a clamping action against the clamping ring at the first position and against the cable at the second position, and clamping means disposed on the ferrule for clamping the ferrule against the clamping ring at the first position and against the cable at the second position.

5. The combination set forth in claim 4 in which the ferrule is provided with at least one arm at the first position and in which the clamping means are disposed on the arm of the ferrule to clamp the arm against the braid.

6. The combination set forth in claim 4 in which the clamping ring is provided with at least one finger and in which the ferrule is disposed on the finger of the clamping ring to clamp the finger against the braid.

7. The combination set forth in claim 4 in which the ferrule is provided with at least one arm at the first position and in which the arm is bent at a position adjacent to the :clamping ring to facilitate the clamping action by the ferrule against the clamping ring.

8. The combination set forth in claim 4 in which the ferrule is provided with at least one arm at the first position and in which the arm is bent at a position adjacent to the clamping ring to facilitate the clamping action by the ferrule against the clamping ring and in Which the clamping ring is provided with at least one finger and in which the ferrule is disposed on the finger of the clamping ring to clamp the finger against the braid.

9. In combination in an electrical connector for use with a cable having an inner conductor, an outer conductive braid and insulating material between the inner conductor and the outer braid, a clamping ring disposed on the braid and provided with at least one finger at one end and disposed with the finger in clamping relationship to the braid, a ferrule made from a conductive matenial and disposed on the braid in electrically coupled relationship to the braid and provided with at least one inwardly tapered arm, the ferrule being disposed on the clamping ring with the tapered portion of the arm on the ferrule disposed on the braid in electrically coupled relationship to the braid, and clamping means disposed on the finger on the ferrule for clamping the finger against the cable to obtain a clamping of the finger on the clamping ring and against the braid.

10. The combination set forth in claim 9 in which the clamping means 4includes a ring disposed on the arm of 6 the ferrule to clamp the arm on the ferrule against the braid.

ll. I-n combination in an electrical conductor for use with a cable having a plurality of inner conductors, an outer conductive braid and insulating material between the inner conductors and between. the inner conductors and the outer conductive braid, a conductive clamping ring disposed on the conductive braid in electrically coupled relationship to the braid, a ferrule made from a conductive material and disposed on the braid at a first position in electrically coupled relationship to the braid and disposed on the clamping ring at a second position displaced from the first position in electrically coupled relationship to the clamping ring, clamping means disposed on the ferrule for mechanically clamping the ferrule against the conductive braid, there being in the ferrule a plurality of passages disposed in spaced relationship to one another, each of the passages in the plurality being formed to define an internal shoulder, a plurality of insulating sleeves each disposed within a different passage in the plurality and having an external shoulder disposed against the internal shoulder of the passage to provide a locking action on the sleeve, each of the insulating sleeves in the plurality also having an internal shoulder, and a plurality of contact members each made from a conductive material and electrically coupled to a different one of the inner conductors of the cable and each disposed within a different one of the insulating sleeves in the plurality and having an external shoulder disposed against the internal shoulder of the sleeve to provide a ylocking action on the contact member.

1'2. The combination set forth in claim ll in which the ferrule is provided with an arrn at the first position and in which the clamping means lis disposed on the arm in mechanically clamped relationship with the arm and in which the clamping ring is provided with a finger and in which the ferrule is disposed on the finger on the clamping ring at the second position to mechanically clamp the finger against the braid.

13. In combination in an electrical connector for use with a cable having an inner conductor, an outer conductive braid and insulating material between the inner conductor and the outer braid, a sleeve made Ifrom a conductive material, a ferrule made from a conductive matenial and disposed on lthe outer conductive braid of the cable in electrically coupled relationship to the conductive braid and in electrically coupled relationship to the sleeve, clamping means disposed on the ferrule for mechanically clamping the ferrule against the outer conductive braid of the cable, the ferrule and the s'leeve being formed to provide a clamping relationship between the ferrule and the sleeve, the ferrule having an integrally formed transverse wall at a position displaced from the position of clamping to the outer conductive braid of the cable, there being a passage through the integrally formed transverse wall of the ferrule and a passage through the conductive sleeve, a first insulating sleeve disposed within the passage in the conductive sleeve, a second insulating sleeve disposed Within the passage in the ferrule and in engaging relationship with the first insulating sleeve, a first contact member disposed within the second insulating sleeve and made Afrom a conductive material and electrically coupled to the inner conductor of the cable, a second contact member disposed Within the first insulating sleeve in electrically coupled relationship to the first contact member, the ferrule being disposed on the conductive braid at a first position and being provided with an arm at the first position and the clamping means being disposed on the arm at the first position to clamp the arm against the braid, and a clamping ring disposed on the braid at a second position displaced from the first position, the clamping ring being provided with a finger, the ferrule being disposed on the finger on the clamping ring and being constructed to clamp the finger on the conductive braid, the integrally formed transverse wall on theferrule being disposed at a third position disp1aced from the rst and second positions.

References Cited in the le of this patent UNITED STATES PATENTS Mener Oct. 18, 1932 Buchanan Oct. 6, 1936 Hardage lune 30, 11942 Parsons Sept. 4, 1951 Quackenbush Sept. 11, 1951 Schonstedt Mar. 25, 1952 Benham et al. Aug. 31, 1954 Flanagan Jan. 18, 1955 Il Collinset al Apr. 17, 1956 Klostermann Aug. 2S, 1956 Watters et al Nov. 11, 1958 Robinson Ian. l1?, 1959 Dupee et a1. Mar. `10s 1959 Flanagan Mar. 10, 1959 Arson Apr. 7, 1959 Oxley Nov. 3, 1959 Abrams Mar. 29, 19610 FOREIGN PATENTS Great Britain Sept. 2, 1935 Great Britain July 26, 1940

Claims

1. IN AN ELECTRIC CONNECTOR FOR A COAXIAL CABLE HAVING AN INNER CONDUCTOR AND AN OUTER CONDUCTING SHEATH, A CLAMP RING ENGAGING SAID OUTER SHEATH, SAID RING HAVING A GREATER OUTER DIAMETER THAN THE OUTER DIAMETER OF SAID CABLE, A CONDUCTING TUBULAR FERRULE HAVING AXIALLY EXTENDING CIRCUMFERENTIALLY SPACED ARMS AT ONE END SURROUNDING SAID RING AT THEIR INNER ENDS, AND HAVING THEIR OUTER END MARGINS DEFLECTED INWARDLY OVER SAID CLAMPING RING TO THE OUTER SURFACE OF SAID CABLE, A C-RING CLAMPED AROUND AND RESTRAINING SAID DEFLECTED ENDS, AND A CONTACT MEMBER INSULATINGLY SUPPORTED WITHIN THE OTHER END OF SAID FERRULE, SAID CONTACT MEMBER HAVING ELECTRICAL CONNECTION WITH SAID INNER CONDUCTOR.