US3703606A - Pin-type insulator - Google Patents

Pin-type insulator Download PDF

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Publication number
US3703606A
US3703606A US145828A US3703606DA US3703606A US 3703606 A US3703606 A US 3703606A US 145828 A US145828 A US 145828A US 3703606D A US3703606D A US 3703606DA US 3703606 A US3703606 A US 3703606A
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United States
Prior art keywords
elements
gripping
cavity
insulator
sleeve
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
US145828A
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English (en)
Inventor
Michel Willem
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Ceraver SA
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Ceraver SA
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Filing date
Publication date
Application filed by Ceraver SA filed Critical Ceraver SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/20—Pin insulators
    • H01B17/22—Fastening of conductors to insulator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/20—Pin insulators

Definitions

  • the present invention pertains to pin-type electric insulators including gripping means to hold the electric conductors intended to be supported by those insulators.
  • Pin-type insulators have been heretofore proposed including a plurality of dielectric elements made of glass or porcelain rigidly coupled together in coaxial relation, for example by means of a cement, with one of the elements affixed to a pin by means of which the insulator is mounted horizontally or vertically on a pole or tower.
  • These insulators support an electric conductor by means of one or more metallic elements which in turn are usually fixed to a metallic stem sealed or cemented to the uppermost or outermost dielectric element, farthest from the supporting pin.
  • the invention proposes to surmount this shortcoming by providing an insulator of the type hereinabove described in which the weight of the conductor is not carried in its entirety by the stern engaged by the conductor, but is rather transmitted at least in part to the cement by which that stem is sealed into the outermost dielectric element.
  • the invention also provides means for fastening the conductor to the insulator which are simple, easy to assemble and disassemble, and which facilitate replacement of the insulator in the event of its accidental breakage.
  • the outermost dielectric element sustains the conductor by means of gripping elements which comprise two concave channel-shaped pieces surrounding the conductor, one of these being fixed to the outermost dielectric element, whereas the other one is movable and can be tightened into a position to hold the conductor with the aid of fastening means provided on thatoutermost dielectric element.
  • the means for tightening the two channel-shaped pieces against the conductor may comprise for example a nut threaded onto a threaded stem which is cemented to the outermost dielectric element, this stem passing through openings in the channel-shaped pieces in such fashion that tightening of the nut on its stem moves the movable one ofthose pieces so as to stress it against the stationary one.
  • the nut may advantageously include a ring or bridle so as to be susceptible of manipulation at a distance.
  • the insulator of the invention has the advantage that the fixed channel-shaped gripping element transmits to the cement which holds the stem a substantial part of the stress imposed on the insulator by the conductor. This permits use of a smaller stem, and the gripping elements themselves can be smaller as well, while effecting nevertheless a secure support for the conductor and permitting easy assembly and disassembly of the conductor to the insulator.
  • FIG. 1 is an axial sectional view of one form of insulator according to the invention
  • FIG. 2 is a view in elevation of that one of the conductor gripping elements in the insulator of FIG. 1 which is fixed with respect to the dielectric elements of the insulator;
  • FIG. 3 is a sectional view taken on the line 3-3 of FIG. 2, shown however at an enlarged scale, and with a showing in phantom of the outermost dielectric element of the insulator and showing in addition, in phantom, lugs or feet which may be included on the gripping element of FIG. 2 to center it in the cavity of the outermost dielectric element of the insulator; and
  • FIG. 4 is a view in side elevation of the movable conductor gripping element in the insulator of FIG. 1.
  • the insulator of FIG. 1 is of the horizontal type. It comprises two dielectric elements 1 and 2, typically of glass or porcelain, joined together by a metallic sleeve 3 which is sealed to those elements by means of a cement 4.
  • Each of the elements 1 and 2 includes a crown 22 and a skirt 23, the skirt of element 1 surrounding a cavity 5 therein and the skirt of element 2 surrounding a cavity 19 therein.
  • the element 1 includes a cavity 5 at which it is sealed to a pin 15, again by means of cement as indicated at 16, for support of the insulator on a post
  • the conductor 7, supported by the outer dielectric element 2 is gripped between two gripping elements 8 and 9 which include channel-shaped portions 8a and 9a (FIGS. 3 and 4) for engagement with the conductor.
  • the gripping elements 8 and 9 are each apertured, as indicated at 17 in FIG. 2 for the element 8 and at 20 in FIG. 4 for the element 9, to pass over a threaded rod or stem 10, sealed by means of cement 18 into a cavity 19 of the outer dielectric element 2.
  • the gripping element 9 is movable on the stem 10, whereas the gripping element 8 is fixed with respect thereto and with respect to the outer dielectric element 2 by means of the cement 18.
  • the gripping element 8 may be provided with roughening on the convex surface thereof, to assist its adhesion to the cement 18.
  • a nut 11, threaded onto the rod 10 makes it possible to clamp the conductor between the gripping elements 8 and 9.
  • the nut may include a clevis-like bridle or loop 21 to facilitate remote manipulation of the nut. Notches not visible in the sectional view of FIG. 1 are provided in the dielectric element 2 to accommodate the conductor 7.
  • a large part of the stress carried by the elements 8 and 9 is transmitted to the body of cement 18 contained in the cavity 19 of the dielectric element 2. More particularly, a part at least of the stress imposed by the conductor 7 onto the element 8 is transmitted directly by the latter to the body of cement l8 and thence to the dielectric element 2, and is not borne by the stem 10.
  • the stem 10 can consequently be of small cross-section and the elements 8 and 9 may themselves be of light construction, being made for example simply of galvanized sheet iron.
  • the cement employed at 4, 16 and 18 is desirably a fibrous cement.
  • the fixed gripping element 8 may be provided with extensions or lugs as indicated in phantom at 14 in FIG. 3, bearing against the inside walls of the cavity 19.
  • the dielectric element 1 does not rest directly against the post 6. Rather, a collar 13 of plastic material or the like avoids direct contact between the post and the element 1. This arrangement limits the bending stress to which the pin 15 is subjected by the conductor. Lugs may be provided on the collar 13 to fit within the cavity 5 and thereby to center the collar with respect to the dielectric element 1, and to facilitate sealing of the collar to that dielectric element.
  • the stem may be offset from the axis of the element 2 so as to dispose the conductor 7 on the axial plane of the insulator.
  • the invention provides a pintype insulator comprising a plurality of dielectric. elements as indicated at l and 2 of the drawings, for example, and means such as the cement 4 supporting those elements in a linear array and in fixed relative position.
  • the array need not however be straight.
  • the insulator further comprises at least two channel-shaped conductor gripping elements, such asthe elements 8 and 9, and means such as the cement 18 sealing one of those gripping elements to the dielectric element at one end of the array.
  • the insulator further comprises two-part interengaging means such as the stem 10 and the nut 11 to stress the two gripping elements together.
  • the insulator may further comprise a pin as indicated at at the end of the array opposite that of the conductor gripping means, and a collar or washer as indicated at 13 engaged on that pin.
  • a horizontal pin-type insulator comprising a metallic sleeve, two cup-shaped dielectric elements having each a crown and having each a skirt surrounding a cavity, said elements being coaxially disposed with their crowns adjacent each other inside said sleeve, a first mass of cementitious material filling said sleeve and holding said elements and sleeve in fixed coaxial relation, a stem cemented into the cavity of one of said elements for affixation of the insulator to a support, a second mass of cementitious material in the cavity of the other of said elements, at least two complementary conductor gripping elements shaped to em brace opposite sides of a filamentary conductor, one of said gripping elements being sealed in said second mass of cementitious material, and two-part interengaging means carried by said other dielectric element to stress the other of said gripping elements against said one gripping element.

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  • Insulating Bodies (AREA)
  • Insulators (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Cable Accessories (AREA)
US145828A 1970-05-25 1971-05-21 Pin-type insulator Expired - Lifetime US3703606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7019002A FR2088172B1 (enExample) 1970-05-25 1970-05-25

Publications (1)

Publication Number Publication Date
US3703606A true US3703606A (en) 1972-11-21

Family

ID=9056063

Family Applications (1)

Application Number Title Priority Date Filing Date
US145828A Expired - Lifetime US3703606A (en) 1970-05-25 1971-05-21 Pin-type insulator

Country Status (6)

Country Link
US (1) US3703606A (enExample)
BR (1) BR7103147D0 (enExample)
ES (1) ES169177Y (enExample)
FR (1) FR2088172B1 (enExample)
GB (1) GB1317124A (enExample)
ZA (1) ZA713275B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6440344B2 (en) * 1997-03-11 2002-08-27 Ngk Insulators, Ltd. Method of manufacturing composite insulator and packing member for use in same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105469912B (zh) * 2015-12-10 2017-03-08 国网四川省电力公司乐山供电公司 钉式绝缘子装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6779A (en) * 1849-10-09 Improvement in supporters f
US821746A (en) * 1904-03-17 1906-05-29 Augusto Richard Insulator.
US843258A (en) * 1905-06-12 1907-02-05 Clark Electric And Mfg Company Insulator-clamp.
US2071231A (en) * 1934-10-08 1937-02-16 Georgia H Duncan Insulator
US2135360A (en) * 1936-02-20 1938-11-01 Ohio Brass Co Conductor support
US2239792A (en) * 1939-09-14 1941-04-29 Ohio Brass Co Trolley wire hanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6779A (en) * 1849-10-09 Improvement in supporters f
US821746A (en) * 1904-03-17 1906-05-29 Augusto Richard Insulator.
US843258A (en) * 1905-06-12 1907-02-05 Clark Electric And Mfg Company Insulator-clamp.
US2071231A (en) * 1934-10-08 1937-02-16 Georgia H Duncan Insulator
US2135360A (en) * 1936-02-20 1938-11-01 Ohio Brass Co Conductor support
US2239792A (en) * 1939-09-14 1941-04-29 Ohio Brass Co Trolley wire hanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6440344B2 (en) * 1997-03-11 2002-08-27 Ngk Insulators, Ltd. Method of manufacturing composite insulator and packing member for use in same

Also Published As

Publication number Publication date
ZA713275B (en) 1972-01-26
BR7103147D0 (pt) 1973-04-12
FR2088172B1 (enExample) 1974-08-09
GB1317124A (en) 1973-05-16
ES169177U (es) 1971-10-01
ES169177Y (es) 1972-03-01
FR2088172A1 (enExample) 1972-01-07

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