US3768065A - Electric connector and method of forming a connection - Google Patents

Electric connector and method of forming a connection Download PDF

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Publication number
US3768065A
US3768065A US00179100A US3768065DA US3768065A US 3768065 A US3768065 A US 3768065A US 00179100 A US00179100 A US 00179100A US 3768065D A US3768065D A US 3768065DA US 3768065 A US3768065 A US 3768065A
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US
United States
Prior art keywords
contact
passage
threaded
sleeve
contact making
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00179100A
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English (en)
Inventor
C Zemels
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KEARNY NAT Inc
Original Assignee
KEARNY NAT Inc
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Filing date
Publication date
Application filed by KEARNY NAT Inc filed Critical KEARNY NAT Inc
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Publication of US3768065A publication Critical patent/US3768065A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/56—Means for preventing chafing or fracture of flexible leads at outlet from coupling part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing

Definitions

  • An electric elbow connector includes a generally L- shaped hollow enclosing structure having a generally L-shaped conducting structure mounted therein and formed of three pieces including a contact body having formed therein a pair of angularly related contact making passages in one of which the shank end of a contact sleeve is disposed and in the other of which a contact pin is threadedly mounted in such manner that the end thereof is disposed in high pressure contact with the side of the shank of the contact sleeve.
  • the pressure applied to the shank of the contact sleeve by the contact pin is insufficient to exceed the elastic limit of the contact body but is sufficiently great to impart deformation thereto whereby a springlike action is achieved resulting in substantially constant contact pressure between the contact body and the shank of the contact sleeve and between the contact pin and the contact body as well as between the contact pin and the side of the shank of the contact sleeve.
  • An electric conductor is interconnected with the contact sleeve in known manner and the contact pin engages the terminal of an electric device such as a power transformer or the like.
  • Known connectors include a hollow L-shaped housing in which two elongated conducting elements are mounted to form an L-shaped current carrying structure. These conducting elements comprise a contact sleeve provided with a transverse threaded passage at one end and a contact pin one end of which is threaded into the transverse passage of the contact sleeve. In order to increase contact pressure, a .slit is formed in the contact sleeve in a direction parallel to the axis thereof and a pair of washer elements are mounted therein and disposed about the threaded end of the contact pin.
  • the contact sleeve Since the contact sleeve is provided with a transverse threaded opening, it is necessary properly to orient the contact sleeve in a rotary and in an angular sense relative to the incoming conductor so that threaded engagement of the end of the contact pin with the transverse passage in the contact sleeve may be effected.
  • this known arrangement requires installation procedures which are tedious, time consuming and costly.
  • a connector of three pieces wherein the shank end of a contact sleeve is interconnected with a contact pin through a contact body in which a pair of angularly related contact making passages are formed. These passages intersect each other and one is threaded to receive the threaded end of the contact pin in such manner as to engage the side of the shank end of the contact sleeve.
  • the contact body is constructed of conducting material and the force applied to the shank of the contact sleeve by tightening the contact pin is such as to impart a degree of deformatinon to the contact body but is insufficient to exceed the elastic limit thereof.
  • the contact body in effect constitutes a spring whereby substantially constant contact pressure is established between the shank of the contact sleeve and the end of the contact pin and between the contact body and each of these elements.
  • substantially constant contact pressure is established between the shank of the contact sleeve and the end of the contact pin and between the contact body and each of these elements.
  • FIG. 1 is an overall perspective view of an elbow connector formed according to the invention
  • FIG. 2 is a view similar to FIG. 1 but which is shown in section so as to depict the assembled relationship of the internal parts;
  • FIG. 3 is an exploded perspective view of the conducting elements formed according to this invention.
  • FIG. 4 is a view somewhat similar to FIG. 2 and which depicts a special tool used to perform one step in the assembly of the connector;
  • FIG. 5 is a view somewhat similar to FIG. 3 and which illustrates the use of another auxiliary tool used in assembling the connector;
  • FIG. 6 is an enlarged view taken generally along the line designated 6-6 in FIG. 4 and which shows the parts before tightening of the contact pin is effected and inwhich FIG. 7 is a view similar to FIG. 6 but which depicts the parts in the positions which they occupy after the contact pin is screwed into its tightened and fully assembled position.
  • the numeral 1 generally designates the elbow housing structure which preferably though not necessarily is constructed of yieldable material.
  • An elongated conductor designated by the numeral 2 enters the housing structure 1 and is surrounded by conventional insulating material 3.
  • a contact pin 4 protrudes outwardly from the lower portion of the elbow housing 1 and, as is well known, is adapted for engaging and making electric contact with the terminal of an electric device such as a power transformer.
  • a contact sleeve 5 is of hollow construction at its right hand end as indicated at 6 and receives the lefthand end of conductor 2. Contact between these elements is secured and maintained by clamping action as is well known.
  • the contact sleeve 5 is provided at its lefthand end with a shank portion 7 which is inserted within a contact making passage 8 formed within contact body 9 following insertion of contact body 9 into elbow 1 by means of special tool T1 as shown in FIG. 4.
  • Contact making passage 8 is smooth and unthreaded and of larger diameter than shank 7 so as to accommodate relative rotation and transverse lost motion therebetween.
  • the end B of shank 7 is bevelled to facilitate assembly.
  • Contact pin 4 is provided with threads 10 and with a reduced end portion 11 of smaller diameter than the threaded portion 10 thereof.
  • the contact pin 4 is screwed into the threaded contact making passage 12 formed in contact body 9 until the end 11 of the contact pin 4 engages and forms an indentation in the shank 7 of contact sleeve 5 as indicated at 13 in FIG. 2.
  • Contact pin 4 is provided with an end portion 14 formed of non-conductive material in conventional fashion.
  • the contact body 9 is disposed in fixed relation within the elbow housing 1 and occupies the position depicted in FIGS. 2 and 4.
  • insertion tool T1 is provided with a handle portion 15 and with a threaded end portion 16 which is adapted to be screwed into the threaded contact making cavity 12 formed in contact body 9. With the contact body securely affixed to the insertion tool T1, the contact body is forced upwardly through the cavity defining passage 17 formed in elbow l to occupy the position shown in FIGS. 2 and 4.
  • the contact making passage 8 is disposed in alignment with the cavity defining passage 18 formed .in the elbow and the contact making threaded passage 12 is automatically disposed in alignment with the cavity defining passage 17 formed in the elbow.
  • the insertion tool 14 is unscrewed and removed. 'The structure is then ready for fieldinstallatiom o Assembly in the field is effected by simply clamping or crimping the contact sleeve 5 onto. the conductor 2 as shown in FIG.
  • a pull ring 22 is mounted on housing structure 1 and, as is well known, is used in manipulatingthe connector contact pin 4 into and out of contact making relationship with the associated terminal of the adjacent electric apparatus by means of a conventional hot stick or the like. 7
  • the exterior surface of the contact body is irregularly configured and acomplementary cavity is formed within the, elbow housing 1 so that movement of the contact body 9 within the elbow housing 1 is prevented.
  • a groove G is formed about the exterior of the contact body 9 and a complementary ridge R is formed in thev interior wall of the housing 1 and is received within the groove G and the exterior of contact body 9 in a plane normal to the axis ofcontact making cavity 16 is polygonal in configuration as shown. in the drawings.
  • substantially constant contact pressure is provided between the end 1 1 of contact pin 4 and the side of shank 7 and between the contact body 9and the contact making threaded portion of contact pin 4 and the smooth unthreaded portion of shank .7.
  • This result is achieved byconstructing the contact making passage 8 of a transverse dimension which is somewhat greater than the exterior transverse dimension of shank 7 as shown in FIG. 6 wherein the parts are shown in untightened condition.
  • the contact making force applied by the contact pin 4 causes the shank 7 to occupy the position depicted in FIG. 7 after contact pressure is established. From FIG. 7, it is apparent that the contact making passage 8 is no longer round but rather is somewhat eliptical indicating that the top portion of.
  • contact making cavity 8 is bowed downwardly somewhat as indicated by the numeral 23 and the sides 24 and 25 of the contact makingpassage 8 are somewhat elongated.
  • the resulting eliptical shape is due to a stretching of the sides 24 and 25, 0f the passage 8 and a slight bending of the upper portion thereof as indicated at 23. Care must be taken to :form the contact body of such material that adequate. contact pressure may be established between the contact surfaces without exceeding the elastic limit of the contact body 9 when the conditions depicted in FIG. 7 are achieved. Under these conditions, the con tact body 9 constitutes a special spring and provides a springlike action whereby substantially constant contact pressure is obtained according to one facet of the invention. When the contact pin is loosened, the parts return to the positions depicted in FIG. 6.
  • the threaded length of passage 12 preferably is greater than the transverse dimension of contact pin 4 as is apparent from an inspection of FIGS. 2 and 3.
  • the coupling portion of contact block 9in which contact making'passage 8 is formed is of substantially less mass than the base portion of the contact block and the parts of the coupling portion which define the contact making passage 8"in' a direction normal to the axis thereof are of substantially smaller dimension than the diameter of passage 8.
  • the inside diameter of contact making passage 8 may be made 0.375 inches and the outside diameter of shank 7 of contact sleeve 5 may be made 0.370 inches to provide a clearance of 0.005 inch where the normal load current is 200 amperes and where the contact body 9 is constructed of an alloy of aluminum. Furthermore suitable results have been achieved with clearances greater or less than 0.005 inch.
  • a suitable aluminum alloy is commonly known in the trade as 6063-T5.
  • a greatly improved connector is provided wherein substantially constant contact pressure is obtained irrespective of ambient or electrical conditions.
  • a greatly improved method of assembly is provided whereby a conductor such as 2 is interconnected through the connector with a terminal of a piece of electric apparatus without requiring tedious alignment and orienting procedures because the parts are automatically oriented and any chance for error during assembly is completely eliminated according to the invention.
  • An electric elbow connector comprising a unitary contact body of conducting material having a base portion of substantial mass and a coupling portion of substantially less mass than said base portion, a threaded contact making passage formed in said base portion, a second contact making passage formed in said coupling portion and transversely disposed relative to said threaded contact making passage and in communication therewith, the thickness of the sides and upper portion which define said second contact making passage in a direction normal to the axis of said second passage being of a substantially smaller dimension than the length of the threaded portion of the contact making passage and the length of said second contact making passage axially thereof being substantially less than the length of said threaded contact making passage axially thereof, a contact sleeve having one end of somewhat smaller diameter than the diameter of said second contact making passage and disposed in said second contact making passage, and a contact pin in threaded engagement with said threaded contact making passage and having its inner end in high pressure contact with said one end of said contact sleeve such that said coupling portion is deformed without exceeding the elastic limit
  • a connector according to claim 1 wherein the contact making end of said contact pin is of smaller diameter than the threaded adjacent portion thereof whereby high pressure contact is established between said contact making end of said contact pin and the outer surface of said shank end of said contact sleeve.
  • a connector according to claim 1 wherein a preformed housing formed at least in part of yieldable material and having angularly related intersecting cavity defining passages is disposed about said contact body and arranged with each cavity defining passage in coaxial relation with one of said contact making passages in said contact body and wherein the difference in diameter between said one end of said contact sleeve and said second contact making passage is approximately 0.005 inch and wherein said contact body is formed of aluminum alloy.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
US00179100A 1971-09-09 1971-09-09 Electric connector and method of forming a connection Expired - Lifetime US3768065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17910071A 1971-09-09 1971-09-09

Publications (1)

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US3768065A true US3768065A (en) 1973-10-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00179100A Expired - Lifetime US3768065A (en) 1971-09-09 1971-09-09 Electric connector and method of forming a connection

Country Status (10)

Country Link
US (1) US3768065A (fr)
JP (1) JPS4836691A (fr)
BE (1) BE779444A (fr)
CA (1) CA972442A (fr)
DE (1) DE2239476A1 (fr)
ES (1) ES401725A1 (fr)
FR (1) FR2152509B1 (fr)
GB (1) GB1382146A (fr)
IT (1) IT965197B (fr)
NL (1) NL7204044A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883208A (en) * 1973-10-25 1975-05-13 Rte Corp Visible break tee-connector
US3998520A (en) * 1975-11-13 1976-12-21 Kearney-National, Inc. Electric elbow connector
US4039244A (en) * 1976-04-09 1977-08-02 Coatings Inc. Bimetallic electrical connector and method for making the same
US4758171A (en) * 1985-11-29 1988-07-19 Raychem Gmbh Cable connection
US4776089A (en) * 1986-09-18 1988-10-11 Rte Corporation Method of assembling tap plug to cable connector
EP1362392A1 (fr) * 2001-02-20 2003-11-19 G & W ELECTRIC COMPANY Connecteur d'alimentation universel pour raccorder des cables flexibles a des dispositifs rigides dans de nombreuses configurations
US8328569B2 (en) * 2010-05-21 2012-12-11 Cooper Technologies Company Adapter for coupling a deadbreak bushing to a deadbreak arrestor elbow
GB2509924A (en) * 2013-01-17 2014-07-23 Itt Mfg Entpr Llc Breakaway electrical connector
US9472894B2 (en) 2014-10-07 2016-10-18 Itt Manufacturing Enterprises Llc Electrical connector for mounting to flexible substrate and coupling with mating connector
US9660402B2 (en) * 2014-04-10 2017-05-23 S&C Electric Company Conductor assembly for power distribution equipment
US9819099B2 (en) 2015-08-13 2017-11-14 Itt Manufacturing Enterprises Llc Multi-part contact having a front contact portion and a rear crimp contact portion joined together at an angle by a threaded connector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50135350A (fr) * 1974-04-10 1975-10-27
US4155614A (en) * 1978-04-17 1979-05-22 Blasius Industries, Inc. Connector assembly for anode button of a cathode ray tube

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1678082A (en) * 1925-03-09 1928-07-24 Rottenburg Henry Plug and socket connecter and the like
US1927267A (en) * 1931-08-24 1933-09-19 Lloyd K James Spark plug
US2297785A (en) * 1941-09-13 1942-10-06 Ibm Terminal for electrical conductors
US2840676A (en) * 1956-05-18 1958-06-24 Mc Graw Edison Co Waterproof electrical couplings and heating element
US3376541A (en) * 1966-03-11 1968-04-02 Rfe Corp Safe break terminator
US3509516A (en) * 1968-02-01 1970-04-28 Mc Graw Edison Co High voltage connector and entrance bushing assembly
US3617987A (en) * 1969-03-10 1971-11-02 Rte Corp Magnetic safe break terminator arc suppressor
US3711808A (en) * 1970-10-28 1973-01-16 Mitsubadenkiseisak Usho Co Ltd Snap operating device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1678082A (en) * 1925-03-09 1928-07-24 Rottenburg Henry Plug and socket connecter and the like
US1927267A (en) * 1931-08-24 1933-09-19 Lloyd K James Spark plug
US2297785A (en) * 1941-09-13 1942-10-06 Ibm Terminal for electrical conductors
US2840676A (en) * 1956-05-18 1958-06-24 Mc Graw Edison Co Waterproof electrical couplings and heating element
US3376541A (en) * 1966-03-11 1968-04-02 Rfe Corp Safe break terminator
US3509516A (en) * 1968-02-01 1970-04-28 Mc Graw Edison Co High voltage connector and entrance bushing assembly
US3617987A (en) * 1969-03-10 1971-11-02 Rte Corp Magnetic safe break terminator arc suppressor
US3711808A (en) * 1970-10-28 1973-01-16 Mitsubadenkiseisak Usho Co Ltd Snap operating device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883208A (en) * 1973-10-25 1975-05-13 Rte Corp Visible break tee-connector
US3998520A (en) * 1975-11-13 1976-12-21 Kearney-National, Inc. Electric elbow connector
US4039244A (en) * 1976-04-09 1977-08-02 Coatings Inc. Bimetallic electrical connector and method for making the same
US4758171A (en) * 1985-11-29 1988-07-19 Raychem Gmbh Cable connection
US4776089A (en) * 1986-09-18 1988-10-11 Rte Corporation Method of assembling tap plug to cable connector
EP1362392A4 (fr) * 2001-02-20 2007-11-14 G & W Electric Connecteur d'alimentation universel pour raccorder des cables flexibles a des dispositifs rigides dans de nombreuses configurations
EP1362392A1 (fr) * 2001-02-20 2003-11-19 G & W ELECTRIC COMPANY Connecteur d'alimentation universel pour raccorder des cables flexibles a des dispositifs rigides dans de nombreuses configurations
US8328569B2 (en) * 2010-05-21 2012-12-11 Cooper Technologies Company Adapter for coupling a deadbreak bushing to a deadbreak arrestor elbow
GB2509924A (en) * 2013-01-17 2014-07-23 Itt Mfg Entpr Llc Breakaway electrical connector
US9407029B2 (en) 2013-01-17 2016-08-02 Itt Manufacturing Enterprises, Inc. Electrical connector
US9660402B2 (en) * 2014-04-10 2017-05-23 S&C Electric Company Conductor assembly for power distribution equipment
US9472894B2 (en) 2014-10-07 2016-10-18 Itt Manufacturing Enterprises Llc Electrical connector for mounting to flexible substrate and coupling with mating connector
US9819099B2 (en) 2015-08-13 2017-11-14 Itt Manufacturing Enterprises Llc Multi-part contact having a front contact portion and a rear crimp contact portion joined together at an angle by a threaded connector

Also Published As

Publication number Publication date
ES401725A1 (es) 1975-11-01
GB1382146A (en) 1975-01-29
IT965197B (it) 1974-01-31
DE2239476A1 (de) 1973-03-15
FR2152509A1 (fr) 1973-04-27
BE779444A (fr) 1972-06-16
JPS4836691A (fr) 1973-05-30
CA972442A (en) 1975-08-05
FR2152509B1 (fr) 1975-03-21
NL7204044A (fr) 1973-03-13

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