US3173988A - Terminal connection for terminal bushing - Google Patents

Terminal connection for terminal bushing Download PDF

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Publication number
US3173988A
US3173988A US172186A US17218662A US3173988A US 3173988 A US3173988 A US 3173988A US 172186 A US172186 A US 172186A US 17218662 A US17218662 A US 17218662A US 3173988 A US3173988 A US 3173988A
Authority
US
United States
Prior art keywords
terminal
tapered
terminal connector
conductor stud
external
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
US172186A
Other languages
English (en)
Inventor
Donald J Martabus
Robert L Hess
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US172186A priority Critical patent/US3173988A/en
Priority to JP827463U priority patent/JPS3937537Y1/ja
Application granted granted Critical
Publication of US3173988A publication Critical patent/US3173988A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/02—Cable terminations
    • H02G15/06—Cable terminating boxes, frames or other structures

Definitions

  • a general object of this invention is to provide an improved terminal connection for a terminal bushing which will result in the terminal bushing being of reduced height, yet being adaptable for interchangeable use, such as for transformer use or for circuit-breaker use.
  • a more particular object of the present invention is to provide an improved terminal connection for a terminal bushing which will provide a weatherproof seal to prevent the entrance of moisture into the interior of the terminal bushing.
  • Still a further object of the present invention is the provision of an improved terminal connection for a terminal bushing involving few parts and adaptable for economical manufacture.
  • Yet a further object of the present invention is the provision of an improved terminal connection for a terminal bushing in which the terminal connection may be rapidly assembled into proper position by unskilled workmen, and also may be adapted for good conducting engagement with associated parts for the transmission of relatively high amperage currents.
  • FIGURE 1 is a side elevational view of a terminal bushing embodying the present invention as applied to a circuit breaker;
  • FIG. 2 is an enlarged vertical sectional view taken through the improved terminal connection of the present invention; as applied to circuit-breaker use.
  • FIG. 3 is a detail plan view of the locking nut of the invention.
  • FIG. 4 illustrates the transformer cable connection to the locking nut when the terminal bushing is applied to transformer use.
  • the reference numeral 1 generally designates a terminal bushing.
  • the terminal bushing 1 may be associated with the cover 2 of a tank structure 3, the latter providing a suitable enclosure for a transformer or for a circuit interrupter, FIG. 1 illustrating, however, the terminal bushing 1 as applied to circuit-breaker use.
  • a flange assembly 4 is provided to permit the fixed mounting of the terminal bushing 1 to a neck portion 5 of the tank structure 3.
  • Bolts 6 and cooperating nuts 7 may be employed for this purpose.
  • Extending longitudinally through the terminal bushing 1 is a tubular conductor stud 9.
  • the circuit-interrupting unit 8 may be threadedly secured to the external lower threaded surface 9a of the terminal stud 9, and hence fixedly mounted thereto.
  • the flexible connector 10 from the transformer may be fished through the hollow interior 11 of the tubular conductor stud 9 and 3,173,988 Patented Mar. 16, 1965 secured to a locking nut 13, as shown in greater detail in FIG. 4- of the drawings.
  • the locking nut 13 has a frusto-conical portion 14, which is adapted to be inserted into a frusto-conically-shaped cavity 15 of a slotted tubular terminal connector 16.
  • a plurality, in this particular instance four, of slots 16a are provided in the lower externally-threaded shank portion 28 of the terminal connector 16.
  • the slotted tubular terminal connector 16 has an annular sealing flange portion 17 with a peripheral overlying portion 18.
  • a resilient gasket 19 is interposed between the sealing flange portion 17 and the upper extremity 9b of the tubular conducting stud 9.
  • a locking bolt 20 is provided having a cap portion 21, the latter seating within a recess 22 provided at the upper extremity of the tubular terminal connector 16. It will be apparent that by utilizing an Allen-head wrench, not shown, Within a suitably-shaped cavity 24 of the cap portion 21 the locking bolt 2t) may be rotated and consequently, through the threaded connection, as at 26, draw the locking nut 13 upwardly effecting thereby a slight spreading of the slotted threaded shank portion 28 of the terminal connector 16 into firm pressural engagement with the internal surface 30 of the terminal stud 9.
  • suitable compression springs are provided internally of the cap shell 31 to effect compression of the porcelain shell 32, flange assembly 4 and lower porcelain shell 34.
  • the tubular terminal stud 9 is correspondingly subjected to tensile stress.
  • Such compression springs are protected from the weather and are maintained in proper position by the cap shell 31.
  • the upper peripheral edge 35 of the cap shell 31 is secured, as by a brazed connection 37, to a mounting collar 38, which in turn, is fixedly connected, as by a soldered connection 39 to the upper external surface 40 of the tubular conductor stud 9.
  • a pipe plug 41 having tapered threads is threadedly secured into position, as shown in FIG. 2.
  • the line connection 35 with its associated apertured terminal 46 may be secured by cooperating nuts 4-3, 44 to the upper external threaded terminal portion, or terminal-attaching portion 45 of the terminal connector 16.
  • the flexible lead 10, connected to the transformer Winding is fished upwardly through the interior 11 of the tubular conductor stud 9 and threadedly secured into the tapped opening 47 provided at the lower end of the locking nut 13, as shown in FIG. 4.
  • the construction of the present invention eliminates two large castings, which were previously used in priorart constructions, and also excessive machining and a number of soldered joints. Moreover, the present invention permits the terminal bushing 1 to have a minimum of height, which is advantageous during shipment of the bushing 1 with other attached electrical apparatus.
  • the improved terminal connector of the present invention merely requires only one casting, or forging, and one machined part made from bar stock, for example; it
  • the improved terminal connector of the present invention ensures good conductivity between the several parts.
  • a terminal bushing of the type having a passageway therethrough in combination, a tubular conductor stud, the outer end of the tubular conductor stud being internally threaded, a unitary terminal connector having an axial bore therethrough mounted in the outer end of the conductor stud in threaded engagement therein, an external lead secured to the external end portion of said unitary terminal connector, the internal end of said axial bore being tapered, the internal end of said terminal connector adjacent the tapered bore portion being slotted to form resilient finger portions capable of radial outward expansion into pressural engagement with the inner wall of the tubular conductor stud, a locking bolt extending through said axial bore of the terminal connector, a locking nut for the locking bolt having a tapered external side portion, the nut being normally disposed in the tapered wall portion of the bore and tending upon tightening of the locking bolt to expand said finger portions into pressural engagement with the adjacent end of the tubular conductor stud, and an internal lead detachably secured to the locking nut
  • Terminal apparatus wherein the axial bore in the unitary terminal connector is additionally characterized as being internally threaded over a portion of the length thereof at the outer end thereof, and including in addition a removable plug in threaded engagement in the internally threaded outer end of said axial here to seal the bore in the unitary terminal connector and seal the inside of the tubular conductor stud from atmospheric moisture, the internal lead being easily removable by removing the plug from the axial bore and thereafter unscrewing the locking bolt.
  • terminal apparatus for use with a terminal bushing of the type having a passageway therethrough, in combination, a tubular conductor stud, the outer end of the tubular conductor stud being internally threaded, a unitary terminal connector having an axial bore therethrough secured in the external end of the tubular conductor stud in threaded engagement therein, the internal end of said axial bore being tapered, the internal end of said terminal connector adjacent the tapered bore portion being slotted to form resilient finger portions capable of radial outward expansion into pressural engagement with the inner wall of the tubular conductor stud, external lead means secured to the external end of the unitary terminal connector, a locking bolt extending through said axial bore of the terminal connector, a locking nut for the locking bolt having a tapered external side portion, the nut being normally disposed in the tapered wall portion of the bore and tending upon tightening of the locking bolt to expand said finger portions into pressural engagement with the wall of the tubular conductor stud, and internal lead means adapted to be connected to electrical equipment and

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  • Insulators (AREA)
  • Housings And Mounting Of Transformers (AREA)
US172186A 1962-02-09 1962-02-09 Terminal connection for terminal bushing Expired - Lifetime US3173988A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US172186A US3173988A (en) 1962-02-09 1962-02-09 Terminal connection for terminal bushing
JP827463U JPS3937537Y1 (cs) 1962-02-09 1963-02-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US172186A US3173988A (en) 1962-02-09 1962-02-09 Terminal connection for terminal bushing

Publications (1)

Publication Number Publication Date
US3173988A true US3173988A (en) 1965-03-16

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ID=22626695

Family Applications (1)

Application Number Title Priority Date Filing Date
US172186A Expired - Lifetime US3173988A (en) 1962-02-09 1962-02-09 Terminal connection for terminal bushing

Country Status (2)

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US (1) US3173988A (cs)
JP (1) JPS3937537Y1 (cs)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414868A (en) * 1967-05-10 1968-12-03 Gen Electric Terminator for connecting a plurality of electrical cables to a secondary of an electrical apparatus
US3633147A (en) * 1970-02-27 1972-01-04 Amp Inc Connector for underground utility applications
US4496208A (en) * 1981-04-24 1985-01-29 Spinner Gmbh Elektrotechnische Fabrik Plug inner conductor for HF coaxial cables

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1837375A (en) * 1925-09-30 1931-12-22 Gen Cable Corp Terminal structure
US1870833A (en) * 1929-04-11 1932-08-09 Westinghouse Electric & Mfg Co Terminal device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1837375A (en) * 1925-09-30 1931-12-22 Gen Cable Corp Terminal structure
US1870833A (en) * 1929-04-11 1932-08-09 Westinghouse Electric & Mfg Co Terminal device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414868A (en) * 1967-05-10 1968-12-03 Gen Electric Terminator for connecting a plurality of electrical cables to a secondary of an electrical apparatus
US3633147A (en) * 1970-02-27 1972-01-04 Amp Inc Connector for underground utility applications
US4496208A (en) * 1981-04-24 1985-01-29 Spinner Gmbh Elektrotechnische Fabrik Plug inner conductor for HF coaxial cables

Also Published As

Publication number Publication date
JPS3937537Y1 (cs) 1964-12-15

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