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US3179741A - Cribbing spring - Google Patents

Cribbing spring Download PDF

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Publication number
US3179741A
US3179741A US295615A US29561563A US3179741A US 3179741 A US3179741 A US 3179741A US 295615 A US295615 A US 295615A US 29561563 A US29561563 A US 29561563A US 3179741 A US3179741 A US 3179741A
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Prior art keywords
spring
cribbing
insulator
wells
loops
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Expired - Lifetime
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US295615A
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Bruce C Wells
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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
    • H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator

Definitions

  • the object of the invention is to reduce radio and television interference caused by loose hardware on high voltage lines using suspension type insulators and to provide a suitable device that can be installed on said lines without taking said lines out of service.
  • FIG. 1 shows the cribbing spring in perspective and in working position.
  • FIG. 2 shows a plan view of the cribbing-spring out of service.
  • FIG. 3 shows a horizontal side view of the cribbing spring out of service.
  • the invention relates to an improved spring, herein called a cribbing spring, used in a suspension type insulator.
  • a static potential is induced on the various metal parts of a suspension type insulator near the conductor that it supports. This causes radio and television interference unless the individual parts of the insulator are under heavy contact pressure, or unless some means of by-passing these parts is used.
  • the cribbing spring is designed to perform both of these functions.
  • the insulator 1 has an inner porcelain recess C and includes an insulator pin 2 forming part of a ball and socket joint 3, which is connected by a clevis joint 4 to a clamp 5 carrying a conductor 6.
  • the cribbing spring A consists of one continuous piece of spring rod or wire material having a pair of large Ushaped loops extending vertically and joined at their lower ends by a horizontal semi-circular loop. The upper ends of the U-shaped loops are joined to two smaller end loops B that press hard against each other at an angle SllfllCiEIlt to be forced astraddle an insulator pin 2.
  • the cribbing spring A is mounted on an insulator 1 with the end loops B astraddle an insulator pin 2 and received in an inner porcelain recess C of the insulator 1.
  • the semicircular loop presses on the conductor clamp 5 with the large U-shaped loops astraddle a ball and socket joint 3 and clevis joint 4.
  • the spring is held in position by its pressure and by the recess C.
  • the cribbing spring A is under pressure to hold the movable parts of the ball and socket and clevis joints under a contact pressure greater than that caused by the action of gravity. It also functions as a bypass for these parts.
  • a suspension type insulator having an insulator pin connected by a joint assembly to a conductor clamp; a compression spring having two end loops clamping against the insulator pin; a pair of large U-shaped loops extending from the endloops on opposite sides of the joint assembly, said large U-shaped loops at their other ends being joined together by an additional loop and pressed against said conductor clamp.

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Description

April 20, 1965 B. c. WELLS 3,179,741
Filed July 15, 1963 2 Sheets Sheet 1 BY BRUCE C. WELLS April 20, 1965 B. c. WELLS 3,179,741
CRIBBING SPRING Filed July 15, 1963 2 Sheets-Sheet 2 INVENTOR.
BY BRUCE C. WELLS United States Patent 0 3,179,741 CRIBBING SPRING Bruce C. Wells, 611 Park Ave, Louisville, Ky. Filed July 15, 1963, Ser. No. 295,615 1 Claim. (Cl. 174-440) The object of the invention is to reduce radio and television interference caused by loose hardware on high voltage lines using suspension type insulators and to provide a suitable device that can be installed on said lines without taking said lines out of service.
FIG. 1 shows the cribbing spring in perspective and in working position.
FIG. 2 shows a plan view of the cribbing-spring out of service.
FIG. 3 shows a horizontal side view of the cribbing spring out of service.
The invention relates to an improved spring, herein called a cribbing spring, used in a suspension type insulator.
On high voltage systems a static potential is induced on the various metal parts of a suspension type insulator near the conductor that it supports. This causes radio and television interference unless the individual parts of the insulator are under heavy contact pressure, or unless some means of by-passing these parts is used. The cribbing spring is designed to perform both of these functions.
The insulator 1 has an inner porcelain recess C and includes an insulator pin 2 forming part of a ball and socket joint 3, which is connected by a clevis joint 4 to a clamp 5 carrying a conductor 6.
The cribbing spring A consists of one continuous piece of spring rod or wire material having a pair of large Ushaped loops extending vertically and joined at their lower ends by a horizontal semi-circular loop. The upper ends of the U-shaped loops are joined to two smaller end loops B that press hard against each other at an angle SllfllCiEIlt to be forced astraddle an insulator pin 2.
The cribbing spring A is mounted on an insulator 1 with the end loops B astraddle an insulator pin 2 and received in an inner porcelain recess C of the insulator 1. The semicircular loop presses on the conductor clamp 5 with the large U-shaped loops astraddle a ball and socket joint 3 and clevis joint 4. The spring is held in position by its pressure and by the recess C. The cribbing spring A is under pressure to hold the movable parts of the ball and socket and clevis joints under a contact pressure greater than that caused by the action of gravity. It also functions as a bypass for these parts.
I claim:
In a suspension type insulator having an insulator pin connected by a joint assembly to a conductor clamp; a compression spring having two end loops clamping against the insulator pin; a pair of large U-shaped loops extending from the endloops on opposite sides of the joint assembly, said large U-shaped loops at their other ends being joined together by an additional loop and pressed against said conductor clamp.
References Cited by the Examiner UNITED STATES PATENTS 318,789 5/85 Patton. 402,434 4/89 Gjestvang. 1,400,253 12/21 Wicker. 2,522,991 9/50 Caserta. 2,999,125 9/61 Young 174l41 FOREIGN PATENTS 713,199 11/41 Germany. 880,992 l/ 43 France.
ARTHUR L. LA POINT, Primary Examiner.
Patented Apr. 20, 1965
US295615A 1963-07-15 1963-07-15 Cribbing spring Expired - Lifetime US3179741A (en)

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US295615A US3179741A (en) 1963-07-15 1963-07-15 Cribbing spring

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US295615A US3179741A (en) 1963-07-15 1963-07-15 Cribbing spring

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US3179741A true US3179741A (en) 1965-04-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546983A (en) * 1968-08-02 1970-12-15 Vernon G Loree Pipe wrench clamp

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US318789A (en) * 1885-05-26 Bicycle
US402434A (en) * 1889-04-30 Nius gjestvang
US1400253A (en) * 1921-06-15 1921-12-13 Albert G Wicker Spring
DE713199C (en) * 1939-10-20 1941-11-03 Porzellanfabrik Joseph Schacht Arc protection fitting for hanging insulators
FR880992A (en) * 1941-12-09 1943-04-12 Electricite De Paris Soc D Device for equalizing potential gradients on the surface of insulators moistened by condensation, dew, rain, etc.
US2592991A (en) * 1949-01-26 1952-04-15 James O Yeager Stalk cutter
US2999125A (en) * 1959-02-27 1961-09-05 Kearney James R Corp Connecting means for insulator strings

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US318789A (en) * 1885-05-26 Bicycle
US402434A (en) * 1889-04-30 Nius gjestvang
US1400253A (en) * 1921-06-15 1921-12-13 Albert G Wicker Spring
DE713199C (en) * 1939-10-20 1941-11-03 Porzellanfabrik Joseph Schacht Arc protection fitting for hanging insulators
FR880992A (en) * 1941-12-09 1943-04-12 Electricite De Paris Soc D Device for equalizing potential gradients on the surface of insulators moistened by condensation, dew, rain, etc.
US2592991A (en) * 1949-01-26 1952-04-15 James O Yeager Stalk cutter
US2999125A (en) * 1959-02-27 1961-09-05 Kearney James R Corp Connecting means for insulator strings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546983A (en) * 1968-08-02 1970-12-15 Vernon G Loree Pipe wrench clamp

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