|Publication number||US3444505 A|
|Publication date||May 13, 1969|
|Filing date||Jan 17, 1967|
|Priority date||Jan 17, 1967|
|Publication number||US 3444505 A, US 3444505A, US-A-3444505, US3444505 A, US3444505A|
|Inventors||Becker Stephen P|
|Original Assignee||Fargo Mfg Co Inc|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (10), Referenced by (24), Classifications (9)|
|External Links: USPTO, USPTO Assignment, Espacenet|
May 13, 1969 s. P. BECKER 3,444,505
CONNECTOR AS SEMBLY Filed Jan. 17, 1967 INVENTOR 576F114? p asckae BY 5 m M ATTORNEYS W 3, 1969 s. P. BECKER, 3,444,505
I CONNECTOR ASSEMBLY Filed Jan. 17. 1967 Sheet 3 of 5 INVENTOR .7 JTEPHFA/ P. 8H
ATTORNEYS y 1969 s. P. BECKER 3,444,505 4 CONNECTORVASSEMBLY Filed Jan. 17. 1967 Sheet 3 of s BY A ATTORNEYS May'l3, 1969 s. P. BECKER 3,444,505
CONNECTOR ASSEMBLY Filed Jan. 17. 19 7 Sheet 4 of 5 BY g A -4 IM ATTORNEYS y 1.969 s. P. BECKER 3,444,505-
CONNECTOR ASSEMBLY I Filed Jan. 17. 1967 Sheet 5 of s INVENTOR S EP/ en} p BEKEQ BY a, pMm M ATTORNEYS United States Patent US. Cl. 33994 2 Claims ABSTRACT OF THE DISCLOSURE A rugged and compact electrical cable connector assembly for direct burial applications providing permanent, water-tight insulated junctions for both secondary phase and neutral conductors including in combination a body formed of an electrically conducting material, arms extending from said body, an arm bore provided in each of said arms, an insulating coating of said body extending partially into each of said bores, attaching means for attaching one of said conductors within one of said bores, and first and second sealing means for respectively providing sealing between said attaching means and said respective bore and said attaching means and said respective conductor.
BACKGROUND OF THE INVENTION It has become highly desirable for a number of reasons to bury electrical transmission wires underground. Connector assemblies for such underground applications must be specifically designed with this end use in view. In direct burial applications where the connection of electrical wires is made and left without benefit of enclosure in a vault, the connector used must be moisture proof and provide its own sealing.
SUMMARY OF THE INVENTION A design in which individual connector assemblies can be stacked for ease of installation and direct burial having a hub assembly of massive conducting material providing high electrical capacity and which is fully insulated with a durable hard insulation covering. A connector assembly in which each conductor can be individually connected to a hub assembly by mechanical tightening and with standard tools to provide a firm yet easily disconnected joint.
A connector assembly in which means are provided for optimum substantially strand to strand contact of connector and cable eliminating cold flow of the connection and there is provided ready accessibility for disconnect or re-entry.
DESCRIPTION OF THE DRAWINGS In the accompanying drawings:
FIG. 1 is a plan view of a connector assembly constructed in accordance with the teachings of this invention with certain cable connections made therewith;
FIG. 2 is an exploded perspective view of that portion of the assembly shown in FIG. 1 which is utilized for attaching cables to the hub portion of the connector;
FIG. 3 is a partially sectional view taken along the line 33 in the direction of the arrows in FIG. 1 illustrating a cable connected to the connector assembly;
FIG. 4 is partially sectional view taken along the line 44 in the direction of the arrows illustrating one form of plug means used to sealingly close a spoke of the hub of the connector in which no cable is disposed;
FIG. 5 is an elevation of the connector assembly of this invention with additional like connectors providing a stack diagrammatically illustrated in phantom lines;
FIG. 6 is an exploded perspective view of an alternate means for providing sealing between the connector assembly and a cable connected thereto;
FIG. 7 is a segmentary view of the structure shown in FIG. 6 with the cable end connection to the hub of the connector assembly shown in detail; and
FIGS. 8-l2 illustrate connector assemblies constructed in accordance with alternate embodiments of the invention.
' DESCRIPTION OF THE PREFERRED EMBODIMENTS A connector assembly 10 constructed in accordance with the teachings of this invention is shown in FIGS. 1 through 4 and consists of hub 12, connector cone 14, jam nut 16, washer 18, sealing grommet 20 and sealing nut 22.
The hub 12 is generally circular and formed out of aluminum or other suitable electrically conducting material With a plurality of radially disposed, internally threaded spokes 24. The hub is provided with an insulating coating 26 such as durable hard vinyl by means of a dip coating process. Of course, other insulating materials can be used for coating or enclosing the hub and other means of attachment of the insulating material to the hub can be utilized in the practice of the invention.
A portion 26 of the insulating material extends within each of the spokes 24 covering a section of the internal threads 24'. The purpose achieved in continuing the coating within the edge portion of the spokes will become apparent below.
Each of the spokes is provided with a two sectioned bore. One bore section is cylindrical and indicated by the numeral 28 in the figures. The major portion of bore section 28 is provided with threads 24'. The second bore section is indicated in the figures by the numeral 30 and is conical in configuration with the cross-sectional diameter of the bore adjacent bore section 28 greatest in diameter but less in diameter than the diameter of bore section 28 providing an annular shoulder 32.
Connector cone 14 is formed of an electrically conducting material and provided with a full length longitudinal slot 34 and two partial slots 36 and 38. The connecting cone 14 is provided, as will be explained in greater detail below, to encircle and grip the strands 40 of a cable 42 attached to the connector and the cone 14 is sized to the conductor to provide optimum encirclement and strand to strand contact. The slots 34, 36 and 38 are provided to allow the connecting cone to become reduced in diameter in the fully assembled connector and firmly grip the cable strands. The internal surface of the cone is provided with a corrugated configuration 44 to aid in the formation of a firm contact with the conductor strand. An additional partial slot which is not seen in the figures is provided diametrically opposite slot 34.
The jam nut 16 is formed of non-conducting material and has a hex nut central flange 46 with cylindrical por tions 48 and 50 extending from opposite sides thereof and providing a continuous longitudinal bore 52 which is flared outwardly slightly at 54 at one end. A major portion of the outer surface of flange 50 and a minor portion of the outer surface of flange 48 are threaded and the threads in the figures are indicated by the numerals 50" and 48' respectively. Jam nut 16 is preferably formed of a plastic material.
Washer 18 is annular and formed of rubber or other plastic flexible material.
The sealing grommet 20 is also formed of a plastic material and in the preferred embodiment the material is soft plastic as compared to the harder plastic out of which the jam nut 16 and sealing nut 22 are formed. Flexible sealing grommet 20 is non-conducting and is provided with a central longitudinal bore 54 of uniform diameter and a section 56 at one end having a uniform outer diameter. The remaining section 58 of grommet 20 is provided with an outer diameter which decreases constantly to provide an outer conical surface having its greater diameter adjacent section 56.
The sealing nut 22 is also formed of non-conducting V material and has a threaded bore section 60' and a lesser diameter bore section forming annular shoulder 62. The outer surface of nut 22 is in hex configuration.
The means for attaching cable 42 to the hub 12- is shown in exploded view in FIG. 2 and the fully assembled condition in FIG. 3. In assembling or in attaching a cable to the connector the cable is prepared by skinning the insulation in the usual manner to expose stranded portion 40. The cable end is threaded through sealing nut 22, grommet 20, jam nut 16 and washer 18 and the exposed end 40 of the cable is inserted within connector cone 14.
Connector cone 14 is placed within bore 30 of spoke 24 and its outer conical surface is adjacent the conical surface of bore section 30. Sealing washer 18 abuts on one side the end of spoke 24 adjacent the insulating coating 26 and on the other side the central portion 46 of jam nut 16. The threaded portion 48' of jam nut 16 is engaged with the threads 24 of the spoke and tighten by rotation of the jam nut. The mechanical pressure wedges the conical connector cone into bore section 30 of the spoke providing a captive connection between the connector cone and the conductor 40. Washer 18 seals the spoke 24 and prevents entry of moisture within the bore 28 thereof. The insulation 26 in contact with washer 18 provides a sealed junction and it is for this reason that in the coating of the hub 12 section 26' of the insulation is provided and in order to insure that there is adequate and complete contact of washer 18 with insulation 26.
Tightening of sealing nut 22 completes the water-tight seal by the annular shoulder 62 of sealing nut 22 forcing the sealing grommet 20 within the flared portion 54 of the bore of the jam nut.
It is noted therefore that each conductor can be individually connected to the hub assembly by mechanical tightening with a standard wrench to provide a permanent yet easily disconnected joint. The sealing nut provides a water-tight seal at the entrance of the cable to the connector and also provides ease of accessibility for disconnector re-entry into the joint.
The water-tight fully insulated assembly permits use with both aluminum and copper conductors.
In the embodiment shown in FIGS. 1 through 4 three spokes remain without a cable entering therethrough. In order to provide a completely insulated unit cylindrical cap 64 formed of non-electrically conducting material are inserted one within each of the spokes 24 not receiving a cable. Each of the caps 64 is provided with a conical body portion 66, a closed bottom 68 and a flange 70 for ease of insertion and removal. It is noted that the caps 64 are of uniform diameter and upon insertion are disposed within bore section 28 of spoke 24.
The completed phase and neutral connections may be stacked pancake fashion in position for ease of direct burial. Each pancake provides complete flexibility to direction of services and of conductor sizes. Hence in FIG. a connector 74 constructed in accordance with the teachings of this invention is shown stacked upon other connectors which are shown diagrammatically and phantom lines and indicated generally by the numerals 76, 7 8 and 80. Means can be provided for affixing the connectors 74, 76, 78 and 80 to one another or they can be merely disposed in stacked position.
An alternate means for providing a seal between a cable and the assembly is shown in FIGS. 6 through 7. The jam nut 116 is equipped with a heat shrinkable silicone rubber tubing 82 to provide the outer seal of the assembly to the cable jacket 142. In this embodiment the shrinkable sleeve 82 is first attached to the flanged section 150 of jam nut 116 by heat shrinking and the cable 142 which has been skinned to expose strands 140 is inserted through the bore of jam nut 116 and the end 140 disposed within connector cone 114. In this embodiment the jam nut 116, connector cone 114, washer 118 and spoke 124 are of the same configuration as in the previous embodiment and in the fully assembled condition the washer is in firm contact with the insulation 126 on the end of the spoke 124 and connector cone 114 is firmly gripping cable end 140.
The remaining portion of tubing 82 is then heat shrunk to firmly embrace the outer surface of cable 142 providing a firm seal therewith.
Other types of shrinkable tubing can be used in the embodiment disclosed in FIGS. 6 and 7 including the tubing which is shrinkable by application of chemicals.
Alternate embodiments of the invention are shown in FIGS. 812.
In FIG. 8 the connector includes a body 200 having four outlets 201, 202, 203 and 204 disposed at right angles to one another and the body and outlets are coated with an insulating material as in accordance with the embodiment shown in FIGS. 1 through 7.
In FIG. 9 a two outlet connector 205 is shown which is also coated as in accordance with the previous embodiments.
In FIG. 10 a four outlet connector 206 is shown having a feeder 207 and 3 tapons 208, 209 and 210 and as with the previous embodiments, the body and arms of the connector are coated with a suitable insulating material.
In FIG. 11 a four outlet dome-type connector having insulating coating is shown and indicated by the numeral 211 with the arms indicated by the numerals 212, 213, 214 and 215 respectively.
In FIG. 12 connector 216 is provided with arms 217, 218, 219 and 220' forming a type of table. The connector 216 as is the case with the connectors previously described, is coated with a non-conducting or insulating material.
Additional or fewer outlets can be provided on the various connectors shown and described.
Thus, among others, the several objects of the invention, as specifically aforenoted, are achieved. Obviously, numerous changes might be resorted to without departing from the spirit of the invention.
1. A connector assembly for electrically and mechanically connecting conductors including in combination a body formed of an electrically conductive material, arms extending from said body, an arm bore in each of said arms, an insulating coating of said body extending partially into each of said bores, a conical section of each arm bore having its greatest diameter outwardly of said body, a collapsible connecting member having an outer conical surface at least partially within said conical section in adjacency with the inner surface of said arm bore and a conductor receiving bore for embracing the exposed conductor end, a threaded bore section of each arm bore outwardly of said conical section, a fastening member having a fastening member bore through which said respective conductor can pass to be received Within said collapsible connecting member, a threaded portion of said fastening member cooperable with said threaded bore section for attaching said fastening member thereto, an abutting surface of said fastening member abutting said connecting member and urging said connecting member toward said body with said connecting member being collapsed about said conductor by the wedging action of its outer surface and the surface of the bore of said conical section, a resilient Washer member with first and second annular surfaces respectively abuttingly engaging said arm at said insulating coating and said fastening member providing a seal between said respective fastening member and said respective bore, an internal camming surface provided by a flared outer end of said festening member bore of increased diameter, a resilient grommet member and a sealing nut cooperable with said fastening member, said sealing nut having an inwardly facing annular shoulder abutting said resilient grommet member and urging it between said camming surface and said respective conductor providing a seal between said respective fastening member and said respective conductor.
2. A connector assembly for electrically and mechanically connecting conductors including in combination a body formed of an electrically conductive material, arms extending from said body, an arm bore in each of said arms, an insulating coating of said body extending partially into each of said bores, a conical section of each arm bore having its greatest diameter outwardly of said body, a collapsible connecting member having an outer conical surface at least partially within said conical section in adjacency with the inner surface of said arm bore and a conductor receiving bore for embracing the exposed conductor end, a threaded bore section of each arm bore outwardly of said conical section, a fastening member having a fastening member bore through which said respective conductor can pass to be received within said collapsible connecting member, a threaded portion of said fastening member cooperable with said threaded bore section for attaching said fastening member thereto, an abutting surface of said fastening member abutting said connecting member and urging said connecting member toward said body with said connecting member being collapsed about said conductor by the wedging action of its outer surface and the surface of the bore of said conical section, a resilient washer member with first and second annular surfaces References Cited UNITED STATES PATENTS 1,441,801 1/1923 Guenther et al 33994 1,706,833 3/1929 Zagorski 339--27O 1,712,108 5/1929 Goeller.
2,087,384 7/1937 Lee 339242 X 2,232,963 2/1941 Papp et al.
2,533,200 12/1950 Rogoff 339223 2,791,623 5/1957 Lock et al.
3,029,407 4/1962 Burton et a1.
3,183,476 5/1965 Sacks et a1 339270 X 3,288,914 11/1966 Fuller et a1 33997 X RICHARD E. MOORE, Primary Examiner.
JOSEPH H. MCGLYNN, Assistant Examiner.
U.S. Cl. X.R.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1441801 *||Dec 6, 1920||Jan 9, 1923||Grabau William C||Terminal|
|US1706833 *||May 25, 1927||Mar 26, 1929||American Lurgi Corp||Clamping device for attaching conductors to supporting and tensioning members|
|US1712108 *||Oct 1, 1926||May 7, 1929||Goeller Robert A||Connecter|
|US2087384 *||Jul 9, 1935||Jul 20, 1937||Burndy Engineering Co Inc||Cable connecter|
|US2232963 *||Jan 3, 1939||Feb 25, 1941||G & W Electric Speciality Co||Electrical connection|
|US2533200 *||Sep 15, 1945||Dec 5, 1950||Burndy Engineering Co Inc||Partially insulated electrical terminal|
|US2791623 *||Jun 30, 1952||May 7, 1957||Anderson Brass Works||Non-electrolyzing connection for dissimilar metals and conductor clamp embodying the same|
|US3029407 *||Apr 15, 1959||Apr 10, 1962||Pyle National Co||Electrical connector with pop-in current-continuing means|
|US3183476 *||Aug 26, 1960||May 11, 1965||Burndy Corp||Connector|
|US3288914 *||Apr 5, 1965||Nov 29, 1966||Amp Inc||Electrical connector having a resilient conductor-engaging area|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3534323 *||Mar 6, 1969||Oct 13, 1970||Fargo Mfg Co Inc||Transformer tap for underground applications with pressure plate connection|
|US3617986 *||Mar 6, 1969||Nov 2, 1971||Fargo Mfg Co||Transformer tap for underground applications|
|US3629792 *||Jan 28, 1969||Dec 21, 1971||Bunker Ramo||Wire seals|
|US3683320 *||May 8, 1970||Aug 8, 1972||Bunker Ramo||Coaxial cable connectors|
|US3710003 *||Apr 16, 1971||Jan 9, 1973||Channell W||Connecting block and housing for use in underground residential power distribution|
|US3860320 *||Apr 9, 1973||Jan 14, 1975||Kinnear Joseph D||Dangler cathode cable assembly|
|US4408092 *||Feb 4, 1982||Oct 4, 1983||Camco, Incorporated||Electrical feedthrough|
|US4503406 *||Jun 30, 1983||Mar 5, 1985||The United States Of America As Represented By The Secretary Of The Navy||Inside collet for coaxial placement of diode|
|US4640572 *||Aug 10, 1984||Feb 3, 1987||Conlon Thomas R||Connector for structural systems|
|US4722695 *||May 13, 1986||Feb 2, 1988||Zwicker & Hensel Elektronische Schalttechnik||Pressurized water-proof connection for an electrical cable|
|US4752252 *||Aug 28, 1987||Jun 21, 1988||Amp Incorporated||Axial grip connector having eccentric jaws|
|US5362253 *||Jan 3, 1994||Nov 8, 1994||Lin Kuang Ts An||Distribution cable mounting device|
|US5899777 *||Mar 13, 1998||May 4, 1999||Liang; Shih-Tsung||Electric wire connector|
|US7160156 *||Feb 24, 2005||Jan 9, 2007||Holliday Randall A||Crimpable wire connector assembly|
|US7618269||Feb 28, 2007||Nov 17, 2009||Hubbell Incorporated||Compliant cap|
|US7959477 *||Aug 20, 2009||Jun 14, 2011||Utilx Corporation||Cable termination connection assembly|
|US8344252||Aug 20, 2009||Jan 1, 2013||Utilx Corporation||Cable splice connection assembly|
|US20050159041 *||Feb 24, 2005||Jul 21, 2005||Holliday Randall A.||Crimpable wire connector assembly|
|US20080202789 *||Feb 28, 2007||Aug 28, 2008||Hubbell Incorporated||Compliant cap|
|US20080254667 *||Jan 27, 2006||Oct 16, 2008||Gary Barnett||Electrical Connector|
|US20100059275 *||Aug 20, 2009||Mar 11, 2010||Utilx Corporation||Cable splice connection assembly|
|US20100062628 *||Aug 20, 2009||Mar 11, 2010||Utilx Corporation||Cable termination connection assembly|
|DE3446463A1 *||Dec 20, 1984||May 15, 1986||Zwicker & Hensel Elektronische||Pressurised-water-protected connections for electronic components, especially proximity switches|
|EP2922145A3 *||Nov 14, 2014||Dec 9, 2015||MAN Truck & Bus AG||Connector assembly and corresponding method|
|U.S. Classification||439/519, 439/805, 174/72.00R, 439/275, 439/807|
|International Classification||H01R11/09, H01R11/00|