US937896A - Strain-insulator. - Google Patents

Strain-insulator. Download PDF

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Publication number
US937896A
US937896A US41022408A US1908410224A US937896A US 937896 A US937896 A US 937896A US 41022408 A US41022408 A US 41022408A US 1908410224 A US1908410224 A US 1908410224A US 937896 A US937896 A US 937896A
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United States
Prior art keywords
tubes
strain
insulator
insulating
jackets
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Expired - Lifetime
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US41022408A
Inventor
Theodore Varney
Edward Ernest Rose
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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Priority to US41022408A priority Critical patent/US937896A/en
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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
    • H01B17/02—Suspension insulators; Strain insulators
    • H01B17/12—Special features of strain insulators

Definitions

  • PENNSYLVANIA ASSIGNORS, BY MESNE ASSIGNMENTS, TO iESTINGHOUSE-ELEG-- T RIC @c MANUFACTURNG COMPANY, @F EAST PITTSBURG, PENNSYLVANA, A CGR- "PORATIGN OF PENNSYLVANIA.
  • Trnononn VARNEY and EDwAnnEnNns'r Ross citizens of the United States, 'and residents, respectively, of Pittsburg and Swissvale, in the county of Allegheny and State of Pennsylvania, have invented a new and useful improvement in Strainlnsulators, oi which the following is a specification.
  • Ourinvention relates to strain insulators for electric lines, and it has for its object te provide a device of this character that shall be compact and durable in construction., easy to assemble and capable of withstanding strains incident tothe use of high voltages,
  • FIG. 1 ' Figure l of the accompanying drawings is a sectional elevation or a device constructed. in accordance with our invention, and Fig. 2 is a detail View of one of the parts shown in Fig. 1.
  • the device here illustrated comprises a pair of similar trusteconical rnetal tubes l and 2 having correspending screw-threaded cylindrical projections 3 and Li, a common sleeve 5. into which. the projections 3 and i are screwed, insulating tubes (i and I seated inthe first-named truste-conical tubes, tapered plugs 8 and 9 seated in the insulating tubes, and molded insulating jackets l() and il on the metal tubes l and 2.
  • the outer surfaces of the metal tubes l and 2 are preferably corrugated in' order that the molded 'insulating material of which the jackets are composed may more readily adhere thereto, and the outer surfaces oit the jackets are corrugated in order to increase the surface or current creepage distances be tween the rated.
  • the plugs 8 and 9 are provided with pro* 4jections l2 and 13 wliichiextend outwardly and are preferably in the forr'n of bolts, their outer extremities being); screw-threaded to receive strain-loops la and l5.
  • the metal tubes l and 2 are iii-st provided with the insulating jackets vl0 and il which are formed by a well known molding processunder the action of high pressures. lin the device illustrated, the insulating jackets project for ma terial distances beyond the extremities of the metal tubes and constitute sleeves 16 and 17.
  • L@ plugs 8 and 9 set-nuts 18 being employed to close the outer ends of the sleeves l@ and it'.
  • the insulatingl tubes ti and which are largely depended upon for taining adequate electrical separation between tbe loops ifi and 15, are real'.
  • 'mm n are provided with cylindrical c* so they may iit into the sie s o and are provided with iioies it? 'to receive .a spannerA wrench.
  • the metal sieevr i 2 are provided ith annular projections 2G and 2i having holes 22 suitably iocated to receive a spanner wrench in order that the two baives oi the device mi: f be easily joined. together and separated each other, 1
  • strain insulator comprising duplicate members tbe adjacent inn ends of which abut against each other are plo vided with external screuti i and coupling sleeve into which the s. screwed.
  • Qfifa strain insulator comprisn plicate metal tapered tubes the inner adjacent ends oit which abut against each other and are provided with external screwthreads, a coupling sleeve into which said ends are screwed, and tapered plugs seated in and insulated from the tubes.
  • a strain insulator' comprising two du- Llicate trusto-conical metal tubes having cyiindrical abutting projections provided with externalv screw-threads, a couoling sleeve into which. said parts are screwed, tapered CSO

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Description

NETE@ STATES rfi "ri if@ ad diluida@ THEDORE VARNEY, OF PITTSBURG, AND EDY/JARD ERNEST ROSE, GF SViTSSVLE,
PENNSYLVANIA, ASSIGNORS, BY MESNE ASSIGNMENTS, TO iESTINGHOUSE-ELEG-- T RIC @c MANUFACTURNG COMPANY, @F EAST PITTSBURG, PENNSYLVANA, A CGR- "PORATIGN OF PENNSYLVANIA.
STRAIN-INS'ULATOE.
T 0 all 'whom it may concern.'
Be it known that we, Trnononn VARNEY and EDwAnnEnNns'r Ross, citizens of the United States, 'and residents, respectively, of Pittsburg and Swissvale, in the county of Allegheny and State of Pennsylvania, have invented a new and useful improvement in Strainlnsulators, oi which the following is a specification.
Ourinvention relates to strain insulators for electric lines, and it has for its object te provide a device of this character that shall be compact and durable in construction., easy to assemble and capable of withstanding strains incident tothe use of high voltages,
'Figure l of the accompanying drawings is a sectional elevation or a device constructed. in accordance with our invention, and Fig. 2 is a detail View of one of the parts shown in Fig. 1.
Referring to the drawings, the device here illustrated comprises a pair of similar trusteconical rnetal tubes l and 2 having correspending screw-threaded cylindrical projections 3 and Li, a common sleeve 5. into which. the projections 3 and i are screwed, insulating tubes (i and I seated inthe first-named truste-conical tubes, tapered plugs 8 and 9 seated in the insulating tubes, and molded insulating jackets l() and il on the metal tubes l and 2. The outer surfaces of the metal tubes l and 2 are preferably corrugated in' order that the molded 'insulating material of which the jackets are composed may more readily adhere thereto, and the outer surfaces oit the jackets are corrugated in order to increase the surface or current creepage distances be tween the rated.
The plugs 8 and 9 are provided with pro* 4jections l2 and 13 wliichiextend outwardly and are preferably in the forr'n of bolts, their outer extremities being); screw-threaded to receive strain-loops la and l5.
in assemblingI the device, the metal tubes l and 2 are iii-st provided with the insulating jackets vl0 and il which are formed by a well known molding processunder the action of high pressures. lin the device illustrated, the insulating jackets project for ma terial distances beyond the extremities of the metal tubes and constitute sleeves 16 and 17.
Specification of Letters Patent.
Application led. January 10, 1908.
parts-which are electrically sepa- 'Pat-ented @et 26, ttig.
Serial No. 410,224.
L@ plugs 8 and 9, set-nuts 18 being employed to close the outer ends of the sleeves l@ and it'. in this way, the insulatingl tubes ti and which are largely depended upon for taining adequate electrical separation between tbe loops ifi and 15, are real'. nd protected from the weather, 'mm n are provided with cylindrical c* so they may iit into the sie s o and are provided with iioies it? 'to receive .a spannerA wrench. The metal sieevr i 2 are provided ith annular projections 2G and 2i having holes 22 suitably iocated to receive a spanner wrench in order that the two baives oi the device mi: f be easily joined. together and separated each other, 1
life desire that our invention shaii i strued to cover various structural tions and that only sucia. iiniitation imposed as are indicated in the a claims.,
W' e claini as our invention:
i. A. strain insulator comprising duplicate members tbe adjacent inn ends of which abut against each other are plo vided with external screuti i and coupling sleeve into which the s. screwed.
Qfifa strain insulator comprisn plicate metal tapered tubes the inner adjacent ends oit which abut against each other and are provided with external screwthreads, a coupling sleeve into which said ends are screwed, and tapered plugs seated in and insulated from the tubes.
A strain insulator' comprising two du- Llicate trusto-conical metal tubes having cyiindrical abutting projections provided with externalv screw-threads, a couoling sleeve into which. said parts are screwed, tapered CSO
US41022408A 1908-01-10 1908-01-10 Strain-insulator. Expired - Lifetime US937896A (en)

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US41022408A US937896A (en) 1908-01-10 1908-01-10 Strain-insulator.

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US41022408A US937896A (en) 1908-01-10 1908-01-10 Strain-insulator.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291890A (en) * 1965-07-30 1966-12-13 Gen Electric Strain insulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291890A (en) * 1965-07-30 1966-12-13 Gen Electric Strain insulator

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