US937867A - Strain-insulator for electric lines. - Google Patents

Strain-insulator for electric lines. Download PDF

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Publication number
US937867A
US937867A US41024608A US1908410246A US937867A US 937867 A US937867 A US 937867A US 41024608 A US41024608 A US 41024608A US 1908410246 A US1908410246 A US 1908410246A US 937867 A US937867 A US 937867A
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United States
Prior art keywords
insulator
strain
electric lines
tapered
tubes
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Expired - Lifetime
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US41024608A
Inventor
Edward Ernest Rose
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CBS Corp
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Westinghouse Electric and Manufacturing Co
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Priority to US41024608A priority Critical patent/US937867A/en
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Publication of US937867A publication Critical patent/US937867A/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

  • nnw'ann ERNEST nosn or swrssvam, rnNNsYLvaNm, assIeNon, BY MESNE as SIGNMENTS, T0 WESTINGHOUSE nnncrmc & MANUFACTURING COMPANY, or EAST rrrrsnuae, PENNSYLVANIA, A conronarroN or PENNSYLVANIA.
  • My invention relates to strain insulators for electric lines and it has for its object to provide a ('(uupact and durable device of this character that shall be capable of Withstanding strains incident to' the use of high.
  • High-voltage strain insulators as heretofore constructed, have sometimes comprised metal tubes having tapered ends into which insulating tubes and tapered plugs were fitted, the metal tubes being surrounded by coatings or jackets of molded insulating material which extended over the ends of the insulatingtubes.
  • I provide an outer casing which is built up of sections and which is so separated from the inner coating or jacket, above mentioned that it is entirely freed from the strains to which the remainder of the insulator is subjected.
  • the outer casing may be replaced by another, when desired, and it serves to elfectually protect the insulator proper from the weather.
  • the insulator here illustrated comprises a metal tube 1 having tapered ends, tapered tubes 2 and 3- of insulating material seated in the ends of the metal tube 1, tapered plugs 4 and 5 seated in the insulating tubes and provided with end projections 6 and 7 which extend for a material distance beyond the extremities oi. the insulating tubes, and strain loops 8 and 9 which are screwed upon the extremities of the projections (i and 7.
  • the insulating tapered tubes 2 and 3 project materially beyond the ends of the metal tube 1 in order to increase the croepage distance between the plugs 1 and 5 and the metal tube.
  • a casing 11 comprising two tapered sections 12 and'13 of porcelain or and 13 are provided with annular grooves The 18 over which the caps 14 and 15 extend, the
  • caps being secured in place by cement which fills the annular -gzrooves 18 and the spaces between the caps and the segments.
  • the caps 14 and 15 are similaflto each other and comprise flanges 19, preferably constructed of cast iron, ,and diaphragms 20 that are fitted over the shanks (5 and 7 and the outer edges of which are cast into or are otherwise secured to the flanges.
  • the diapl 'agms 20 are provided with annular corrugations between the shanks and the flanges and are sealed to the shanks by set-nuts 21 and 22 which are screwed upon the shanks at the respective sides of the diaphragm.
  • Asbestos washers 23 may preferably beinterposed between the casing segments and the caps and also between the two i agments', and the space within the casihgilnay be filled with an insulatin gum or similar substance 10 which is su ficiently yielding to permit, therelativo'rnovement above indi-' able that modifications in their contours may s siem clu.

Description

APPLICATION FILED JAN 10.1908
Patented Oct. .26, 1909v M E S S E N n W AT'TORNEY antral) s rars Ion.
nnw'ann ERNEST nosn, or swrssvam, rnNNsYLvaNm, assIeNon, BY MESNE as SIGNMENTS, T0 WESTINGHOUSE nnncrmc & MANUFACTURING COMPANY, or EAST rrrrsnuae, PENNSYLVANIA, A conronarroN or PENNSYLVANIA.
STRAIN -I1\T SULA'I'OR FCE ELECTRIC LINES.
937,867 Specification of Letters Patent. Patented Oct. 26 1909.
Application filedJanuary 10, 1908. Serial 130. 410,248.
To (1, 10710711 "it may concern:
lie it known that l, llnw nn ERNEST Rose, a citizen of the llnitcd States, and a resident of Swissvale. in the county of Allegheny and State of Pennsylvania, have invented a new and useful In'iprovement in Strainlusulators for Electric Lines, of which the following is a specification. I
My invention relates to strain insulators for electric lines and it has for its object to provide a ('(uupact and durable device of this character that shall be capable of Withstanding strains incident to' the use of high.
voltages and that shall also embody an improved casing of insulating material which is exempt from the strains to which the other parts are subjected.
High-voltage strain insulators, as heretofore constructed, have sometimes comprised metal tubes having tapered ends into which insulating tubes and tapered plugs were fitted, the metal tubes being surrounded by coatings or jackets of molded insulating material which extended over the ends of the insulatingtubes.
According to my present invention, I provide an outer casing which is built up of sections and which is so separated from the inner coating or jacket, above mentioned that it is entirely freed from the strains to which the remainder of the insulator is subjected. The outer casing may be replaced by another, when desired, and it serves to elfectually protect the insulator proper from the weather.
The single figure of the accompanying drawing is a partially sectional elevation of a strain insulator constructed in accordance with n' invention. v v r Rel'erring to the drawing, the insulator here illustrated comprises a metal tube 1 having tapered ends, tapered tubes 2 and 3- of insulating material seated in the ends of the metal tube 1, tapered plugs 4 and 5 seated in the insulating tubes and provided with end projections 6 and 7 which extend for a material distance beyond the extremities oi. the insulating tubes, and strain loops 8 and 9 which are screwed upon the extremities of the projections (i and 7. The insulating tapered tubes 2 and 3 project materially beyond the ends of the metal tube 1 in order to increase the croepage distance between the plugs 1 and 5 and the metal tube. The
interior of the insulator, between the plugs 4 and 5 may preferably be filled with asphalt gum or other insulating material which may be poured in when hot and allowed to set by cooling to ordinary temperatures. In order that a still better protection may be afforded for the entire device, I provide a casing 11 comprising two tapered sections 12 and'13 of porcelain or and 13 are provided with annular grooves The 18 over which the caps 14 and 15 extend, the
caps being secured in place by cement which fills the annular -gzrooves 18 and the spaces between the caps and the segments.
1 The caps 14 and 15 are similaflto each other and comprise flanges 19, preferably constructed of cast iron, ,and diaphragms 20 that are fitted over the shanks (5 and 7 and the outer edges of which are cast into or are otherwise secured to the flanges. The diapl 'agms 20 are provided with annular corrugations between the shanks and the flanges and are sealed to the shanks by set- nuts 21 and 22 which are screwed upon the shanks at the respective sides of the diaphragm.
Although tight joints are formed at the ends of casing 11 the strains which are imposed upon the insulator proper are not imparted to the casin since the annular corrugations in the diaphragms permit of a slight relative movement between the strain parts and the casino. 7 Asbestos washers 23 may preferably beinterposed between the casing segments and the caps and also between the two i agments', and the space within the casihgilnay be filled with an insulatin gum or similar substance 10 which is su ficiently yielding to permit, therelativo'rnovement above indi-' able that modifications in their contours may s siem clu.
ioussiy b1
US41024608A 1908-01-10 1908-01-10 Strain-insulator for electric lines. Expired - Lifetime US937867A (en)

Priority Applications (1)

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US41024608A US937867A (en) 1908-01-10 1908-01-10 Strain-insulator for electric lines.

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US41024608A US937867A (en) 1908-01-10 1908-01-10 Strain-insulator for electric lines.

Publications (1)

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US937867A true US937867A (en) 1909-10-26

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