US838537A - Cross-arm for electrical construction. - Google Patents

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Classifications

• • 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
  • H01B17/24—Insulators apertured for fixing by nail, screw, wire, or bar, e.g. diabolo, bobbin
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G7/00—Overhead installations of electric lines or cables
  • H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers

Definitions

• FIG. 1 is a view in side elevation illustrating my invention.
• Fig. 2 is a view in section through one of the sustaining-sockets on the line 2 2, Fig. 1.
• Fig. 3 is a detail view showing one of the hooks with a line-wire secured in place thereupon.
• Fig. 4 is a view similar to Fig. 2, certain parts being omitted.
• My invention is designed to provide a metal cross-arm having integral underhanging sustaining-sockets and upwardly-extended insulator-supporting arms.
• a represents the body of the cross-bar, which is formed of angle-iron or metal of angular form, rovided at intervals with upwardly-exten ing insulator-su porting arms I), said arms united also with t e body by means of strengthening ribs or yokes c.
• ribs or yokes are located adjacent to the said arms, they not only help to support the arms, but a special feature of their use is to brace the body of the cross-arm against torsional strain, and the yokes or braces'might therefore be located at any desired points within the scope of my invention.
• a rib or yoke is shown intermediate the extremities of the crossarm through which is formed a hole or orifice e for receiving a bolt to unite the cross-arm upon a pole.
• brace-arms f f converging upwardly, as shown, and provided with bolt-orifice g, through which a bolt may be engaged in the pole, said bracearms serving to stiffen the union of the crossarm upon the pole and counteract lateral strain.
• These brace-arms might be led outward farther toward the extremities of the cross arm, if desired.
• These braces are formed in my invention as integral parts of the cross-arm.
• the upwardly-extended supporting-arms are shown threaded to receive insulators h.
• the lateral edges of the hook are also preferably grooved, as indicated at n, to further receive the tie-wire.
• I have shown the hooks engaged in the sustaining-sockets by an intermediate insulator 1", threaded into the socket and into which the shank of the hook is threaded.
• the insulators are preferably constructed so as to have a skirt effect. Between the shank of the hook and the insulator I have also shown a yielding substance sas of felt, for exampleto diminish the liability of breaking the insulator.
• a metallic supporting cross-arm for 100 electrical construction comprising a body of angular form 1n cross-section, having a series .of yokes or ribs to resist torsional strain, a
• A. metallic supporting crossarm for electrical construction comprising a body of angular form in cross-section, having a series I 10 of yokes or ribs to resist torsional strain, a series of upwardly-projecting insulator-supporting arms or pins, and a series of internally-threaded sustaining-sockets projecting downwardly from the under side of the body.
• a metallic supporting cross-arm for electrical construction comprising a body of angular form in cross-section, having a series of yokes or ribs to resist torsional strain, a series of upwardly-projecting insulatorsup porting arms or pins, and a series of sustaining-sockets projecting downwardly from the under side of the body, all constructed in a single integral piece.
• a metallic supporting crossarm for electrical construction comprising a body of angular form in cross-section, having a series of yokes or ribs to resist torsional strain, a series of upwardly-projccting insulator-supporting arms or pins, and a series of sustaining-sockets projecting downwardly from the under side of the body, and a line-wire-sustaining device engaged in said sustainingsockets.
• a metallic supporting cross-arm for electrical construction comprising a body of angular form in cross-section, having a series of yokes or ribs to resist torsional strain, a series of upwardly-projecting insulator-supporting arms or pins, a series of sustainingsockets projecting downwardly from the under side of the body and line-wire-sustaining devices engaged in said sockets, said devices having threaded shanks.
• a metallic supporting crossarm for electrical construction comprising a body oi? angular form in cross-section, having a series of yokes or ribs to resist torsional strain, a series of upwardly-projecting insulatorsup porting arms or pins, and a series o'l sustaining-sockets projecting dmvnwardly from the under side of the body, and a line-wire-sustaining device engaged in said sustainingsockets, said devices constructed with means to support tie wires to hold the line-wires in position.
• a metallic supporting cross-arm for electrical construction comprising a body of angular form in cross-section, having a series of yokes or ribs to resist torsional strain, a series of upwardly-projecting insulator-supporting arms or pins, and a series ol sustaining-sockets projecting dmvmvarrlly from the under side of the body, and braces to resist lateral strain, all constriuwted in a single integral piece.

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Description

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=2907009

Family Applications (1)

Country Status (1)

Cited By (2)

• 1906
  • 1906-04-09 US US31069206A patent/US838537A/en not_active Expired - Lifetime

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