US3749861A - Detachable clamping electrical connector - Google Patents

Detachable clamping electrical connector Download PDF

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Publication number
US3749861A
US3749861A US00172075A US17207571A US3749861A US 3749861 A US3749861 A US 3749861A US 00172075 A US00172075 A US 00172075A US 17207571 A US17207571 A US 17207571A US 3749861 A US3749861 A US 3749861A
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US
United States
Prior art keywords
electrical
stud
clamping
electrical connector
plate
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
US00172075A
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English (en)
Inventor
N Davies
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 US00172075A priority Critical patent/US3749861A/en
Priority to JP1972095484U priority patent/JPS4834056U/ja
Application granted granted Critical
Publication of US3749861A publication Critical patent/US3749861A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches

Definitions

  • ABSTRACT An improved detachable clamping electrical connector is provided including a pair of spaced slotted plate portions, each having an aperture therethrough, of generally the same size and configuration as the electrical stud, to which electrical connection isdesired.
  • a slotted U-shaped electrical strap member is provided, having spaced apertures therethrough,
  • clamping means extending through the closed end of the U-bend to clamp the furcations of the connector together and around the associated electrical stud.
  • Cleats and a clamping bolt are provided to urge the furcations of the separate slotted plates together to provide firm electrical engagement with the associated electrical stud.
  • An improved disconnecting switch having a grounding switch associated therewith, is provided utilizing the aforesaid electrical connector.
  • the improved electrical connector may be associated with a terminal bushing having electrical connection thereto provided by the aforesaid detachable electrical connector.
  • the invention may be applied to a bus-riser attached to the main disconnecting contacts of a circuit breaker, again having the improved electrical connector attached to the primary disconnecting stud portion thereof.
  • the invention may be applied, importantly, to the connecting stud of a vacuum-type circuit breaker to make rigid good electrical connection therewith, either at the stationary contact end, or at the movable-contact end of the vacuum circuit breaker.
  • a breaker stud has had the end portion thereof threaded, and to this threaded end has been threadedly secured an electrical bus-bar riser, which has been slotted, and has an aperture to accommodate the threaded end of the breaker stud.
  • the arrangement has been such that the bus-bar riser has been threaded onto the threaded end of the breaker stud, and a clamping bolt has been provided at the furcated end of the slotted bus-bar riser to clamp the furcations together.
  • a pair of spaced slotted plate portions have apertures provided therethrough to accommodate the stud portion of the associated apparatus; and clamping means, including at least one detachable clamping bolt, is provided to clamp the free ends of the furcations of the spaced plates portions together for good electrical contact with the electrical stud.
  • a clamping bolt which extends through the closed end of the U, and secures the furcations of the slotted U-shaped strap together for firm electrical contact with the associated electrical stud.
  • the present invention has particular applicability to disconnecting-switch structures in which, for example, a grounding switch blade it utilized, which is rotatable into its open and closed-circuit positions. At the relatively stationary end of the rotatable grounding switch blade, there may be used, to advantage, the improved electrical connector of the present application.
  • Another object of the present invention is the provision of an improved electrical connector of inexpensive construction, and readily fabricated in an expensive manner, and involving relatively few component parts.
  • Still a further object of the present invention is an improved vacu'um-type circuit interrupter having an improved electrical connection associated with either the stationary or movable contacts thereof.
  • Still a further object of the present invention is the provision of an improved bus-riser arrangement, which may be detachably connected to the primary disconnecting contact of the breaker.
  • FIG. 1 is a side elevational view of a high-voltage disconnecting switch having associated therewith an improved grounding switch, to which the improved electrical connector of the present invention is applied, the disconnecting switch being illustrated in the closedcircuit position, and the grounding blade also being shown in the closed-circuit position;
  • FIG. 2 is a top plan view of the disconnecting switch of FIG. 1, again the high-voltage disconnecting switchblade being shown in the closed-circuit position, and portions of the grounding blade being omitted for clarity;
  • FIG. 3 is an end elevational view of the disconnecting-switch structure of FIGS. 1 and 2, the high-voltage disconnecting switch-blade being shown in the closedcircuit position, and also the grounding blade being shown in the closed-circuit position.
  • FIGS. 4 and 5 illustrate detailed views of the improved electrical connector applied to the lower end of the rotatable grounding blade of FIG. 3;
  • FIG. 6 illustrates the upper end of a terminal-bushing structure illustrating an application of the improved electrical connector of the present invention
  • FIG. 7 is an enlarged top plan view of the electrical connector of FIG. 6, showing the improved clamping construction
  • FIG. 8 is a side elevational view of the electrical connector of FIG. 7;
  • FIG. 9 is an end elevational view of the electrical connector shown in FIG. 8, taken substantially along the line IX-IX of FIG. 8: I
  • FIG. ioinu'st'r' ates a vacuum-typeEircuit interrupter with the contacts illustrated in the. open-circuit position. and illustrating an application of the electrical connector to the upper stationary contact stud of the breaker;
  • FIG. 11 shows a bus-riser attachment to the primary stationary disconnecting contacts of the interrupter of FIG. 10, utilizing the improved electrical connector of the present invention, as connecting to upwardly-extending bus structure, the latter extending into cubical connectors, not shown.
  • FIG. 12 illustrates a further form of clamping connector: and.
  • FIGS. 13 and I4 illustrate, to an enlarged scale, the separate formed slotted clamping plates used in the modified clamping arrangement of FIG. 12.
  • FIGS. l-3 illustrate a high-voltage disconnectingswitch structure 1 having incorporated therewith a grounding-switch structure 2, of the general type as set forth in U.S. Pat. No. 3,316,366, issued Apr. 25, I967, to George Siviy and Victor F. Sabol, and assigned to the assignee of the instant application.
  • a base member 4 preferably of channel-shaped construction, upstanding insulator stacks 6, 7 and 8, which support the live component parts of the disconnecting-switch structure 1, as shown more clearly in FIG. 1.
  • a break-contact structure 10 At the upper end of the insulator stack 6 is provided a break-contact structure 10, and extending laterally thereof the stationary contact structure 12 for the grounding switch structure 2.
  • the center insulating stack 7 supports the hinge-contact assembly 14 for the rotatable main switch-blade 16, which may be rotated about the pivot axis 18.
  • a crank-member 20 For effecting the swinging rotative opening and closing motions of the high-voltage switch-blade structure 16 there is provided a crank-member 20, supported at the upper end of the third insulator stack 8.
  • the third insulator stack 8 is adapted for rotative movement by a crank arm 22, which may be mechanically connected to linkage-operating structure, not shown.
  • the third insulator stack 8 may be rotated, thereby effecting rotative movement of the crank-arm 20 about a horizontal plane, and through the linkage structure 24, effecting swinging upward and opening motion of the high-voltage disconnecting switch-blade 16.
  • the gounding switch 2 Cooperating with the live-break end of the disconnecting-switch structure 1 is the gounding switch 2, which is actuated by the rotation of a horizontallyextending operating shaft 26, more clearly illustrated in FIG. 3 of the drawings.
  • rotation of the operating shaft 26 (FIG. 3) effects swinging opening and closing motions of the grounding switch-blade 28 into and out or contacting engagement with the upper live stationary contact assembly 12, which makes engagement and disengagement with the upper free end 28a of the grounding disconnecting switch-blade 28.
  • the improved electrical connector 30 of the present invention accomplishes this task.
  • a U-shaped strap member 32 having a slotted intermediate portion 34, which leads into accommodating apertures 36, which accommodate the lower end 28b of the grounding switch-blade 28.
  • a clamping bolt 38 and nut 39 shown more clearly in FIG. 5, extends through the closed U-portion 41 of the U-shaped strip 32, and clamps the two furcations 32a, 32b of the plate portions 320 and 32d together in a manner more clearly shown in FIG. 5 of the drawings.
  • Flexible shunts 43 brazed to a plate portion 45, may be interposed between the free ends 32e, 32f of the furcations of the U-shaped strap member 32, and may be bolted together by suitable clamping bolts 47, as shown more clearly in FIG. 5 of the drawings.
  • FIGS. 6-9 illustrate another application of the present invention, FIG. 6 illustrating the upper portion of a terminal bushing, the details of which may be learned from a study of U.S. Pat. No. 3,529,072, issued Sept. 15, 1970, to Charles F. Sonnenberg and James H. Frakes, and assigned to the assignee of the instant application.
  • This patent illustrates a typical terminal bushing, but it will be obvious to those skilled in the art, that the improved electrical connector 30 of the present invention could be applied to any terminal-bushing structure, which has an externally-extending stud portion, such as the stud 51 of FIG. 6.
  • FIGS. 7-9 illustrate a modification of the invention involving the use of spaced conducting plates 53, 55, each having a slotted portion extending into an aperture, which accommodates the stud portion 51 of the terminal bushing 49 of FIG. 6.
  • a pair of spaced conducting flat plates 53, 55 have slots 53a, 55a, which lead into apertures 53b, 55b, conformed to closely surround the terminal stud 51.
  • Notches 53c, 550 are stamped, or otherwise formed, in the flat plates 53, 55 to accommodate U-shaped cleats 57, 59.
  • These cleats 57, 59 have holes therein to receive a clamping bolt 60 and nut 61. This clamps the furcations 53c, 55c together to thereby firmly clamp the sides of the holes 53b, 55b to the sides of the terminal-bushing stud 51.
  • FIG. 9 which illustrates an end view of the electrical connector 52 of FIG. 8, more clearly illustrates the cooperation between the cleats 57, 59 and the clamping bolt 60, as shown.
  • FIG. 10 illustrates the application of the improved electrical connector of the present invention to the upper stationary contact stud 63 of a vacuum-type circuit interrupter 65.
  • upward rotative movement of the operating lever 67 as effected by upward movement of the insulating operating rod 69, effects upward closing movement of the movable contact into abutment with the stationary contact 71 to make electrical connection through the switch 65.
  • FIG. 11 illustrates a bus-riser arrangement in which the upwardly-extending bus-bar 78 is electrically connected to the primary disconnecting contact 80 of the circuit-breaker structure 65, as shown in FIG. 10.
  • the base supporting portion 72 of FIG. 11 may be the same type of base structure 72, as shown in FIG. 10, and the primary disconnecting contact 80 of the circuit-breaker structure 65 may be electrically connected to the bus bar riser 78, as shown in FIG. 11.
  • the clamping structure may be as illustrated in FIGS. 7 through 9 of the drawings.
  • the electrical joint structure 30, 52 of the present invention has many advantages. It eliminates the expensive manufacturing processes, as required heretofore, such as threading, milling, drilling and tapping operations.
  • the plate portions are of such cross-section, that they may be fabricated by inexpensive stamping methods; and a more efficient electrical joint may be achieved by clamping bolts 38, 60.
  • the clamping bolt 38 or 60 may be slightly increased from inch diameter clamping bolt to a 9% inch diameter clamping bolt, having a clamping force twice that achieved with the formerly-used three-eighths inch diameter clamping bolt of prior-art connectors. Material savings are also realized with the improved electrical connector arrangement of the present invention.
  • the improved electrical connector arrangement of the present invention has resulted in considerable cost savings being realized, using this split clamp-type of arrangement over existing designs.
  • FIGS. 12-14 illustrate a further embodiment of the invention, in which each connector plate 83 is provided with a recess portion 83a, which accommodates the clamping bolt 82, as shown more clearly in FIG. 12 of the drawings. It will be noted that again each connector plate 83 is provided with a slot 84 and an aperture 85, which closely surrounds the stud portion 63 of the stationary-contact end of the vacuum bottle" 65.
  • a detachable clamping heavy-current electrical connector adaptable for making a good clamping electrical connection to an electrical stud, comprising, in combination, a pair of abutting separable flat independent plates formed of a relatively heavy plate material and each plate having an aperture therethrough of generally the same size and configuration as the electrical stud to which connection is desired, a slot in each separable independent plate communicating with the aperture in the respective separable plate, each separable plate having a semicircular groove provided therein at one end of the respective plate and disposed transversely of the respective slot, said slot in each plate opening to the edge of the plate, means for securing said pair of flat plates in abutment, and clamping means comprising at least one detachable clamping bolt for clamping the free ends of the furcations of the abutting plates together for good electrical contact with the electrical stud, and said detachable clamping bolt being encompassed and guided by the cooperating semicircular grooves provided by the abutting separable plates.
  • An electrical connector joint including means defining a terminal stud, a pair of slotted and apertured conducting clamping plates with the apertures conforming to the cross-sectional configuration of said terminal stud, a pair of cleats straddling the opposite furcations of the clamping plates, and a clamping bolt extending through both cleats and disposed between the furcated ends of the two clamping plates.

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US00172075A 1971-08-16 1971-08-16 Detachable clamping electrical connector Expired - Lifetime US3749861A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US00172075A US3749861A (en) 1971-08-16 1971-08-16 Detachable clamping electrical connector
JP1972095484U JPS4834056U (enrdf_load_stackoverflow) 1971-08-16 1972-08-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00172075A US3749861A (en) 1971-08-16 1971-08-16 Detachable clamping electrical connector

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US3749861A true US3749861A (en) 1973-07-31

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JP (1) JPS4834056U (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5335161A (en) * 1992-03-30 1994-08-02 Lorad Corporation High voltage multipliers and filament transformers for portable X-ray inspection units

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1661375A (en) * 1926-03-15 1928-03-06 Delco Remy Corp Conductor clamp
US3409865A (en) * 1966-07-21 1968-11-05 Quick Cable Corp Battery terminal clamp
US3568138A (en) * 1968-01-05 1971-03-02 Amp Inc Post terminal connector

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4325707Y1 (enrdf_load_stackoverflow) * 1965-08-06 1968-10-28

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1661375A (en) * 1926-03-15 1928-03-06 Delco Remy Corp Conductor clamp
US3409865A (en) * 1966-07-21 1968-11-05 Quick Cable Corp Battery terminal clamp
US3568138A (en) * 1968-01-05 1971-03-02 Amp Inc Post terminal connector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5335161A (en) * 1992-03-30 1994-08-02 Lorad Corporation High voltage multipliers and filament transformers for portable X-ray inspection units

Also Published As

Publication number Publication date
JPS4834056U (enrdf_load_stackoverflow) 1973-04-24

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