US2343576A

US2343576A - Support for electric conductors

Info

Publication number: US2343576A
Application number: US470423A
Authority: US
Inventors: Ralph R Pittman
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-12-28
Filing date: 1942-12-28
Publication date: 1944-03-07
Anticipated expiration: 1961-03-07

Description

- March 7, 1944. R. R. PITTMAN 2,343,576

SUPPORT'FOR ELECTRIC CQNDUCTORS Filed Dec. 28, 1942 INVENTOR Patented Mar. 7, 1944 UNITED STATES PATENT O F F ICE SUPPORT FOR ELECTRIC CONDUCTORS Ralph E. Pittman, Pine Bluff, Ark.

Application December 28, 1942, Serial No. 450,423-

6 Claims. (Cl. 1 7 4164) This invention relates generally to. conductor supports for overhead electric conductors, and more. particularly to: a. support for conductors betweenwhich the potential difference is less than about 600 volts.

The objects of this invention include the pro vision. of (1) a support for two or more overhead conductors which can be satisfactorily fastened to a pole or other above-ground structure by means of. a single attaching-bolt or fastener; (2-) a. support embodying in a single piece of insulating material a body portion including oppositely extending end portions to which a con ductor may be tied withv a shorter tie wire than has heretofore been required, at the same time providing an improved. fastening; (3) a support having. a; base. adapted. for mounting on a wood structure so that angular displacement due to unbalanced pull. on the. conductors is prevented, the support-restraining elements cooperating with the: base and body portions to compress them and at the; same. time preventing rotative movement jointly or separately of the base portion and the. body portion; (4-) in general an inexpensive support of a construction providing efllcient' use of each. portion of the device and advantages over articles for the same. purpose heretofore available. Other objects will appear as. the description proceeds.

With. the above objects in mind, ,my invention resides in the features of construction and arrangem'ent. and form of the parts, to be exempli' fied: in the description to follow, and the scope of the invention will be pointed out in the appended claims:

In the drawing of the embodiment of the invention herein described: Fig. 1' is a side elevational view of the support, shown in section; Fig. 2 is a rear elevational view; Fig. 3 is an end view of the support; and Fig. 4 is a side elevational view of the support when mounted in the service position. I

Referring to the several figures of the drawing, it may be noted that thesupport includes the longitudinally upstanding body portion l0, and the base portion l I. The body portion l comprises the central or intermediate portion l2, of rectangular or square section, from which the end or conductor-receiving portions I3 and M, r

of circular section, respectively coaxially upwardly and downwardly extend. The upper conductor-receiving portion I3 is provided with two horizontally positioned axially spaced conductorreceiving grooves l-5 and I1, and similarly the lower conductor-receiving portion M is provided with the conductor-receiving grooves l6 and it.

The upper and lower grooves l5 and 16 are for the purpose of supporting conductors extending laterally from the support, as the conductors 21 and 28 of Fig. 4, such conductors exerting the greatest stress upon. the support. They are therefore positioned: as nearly as practicable to the central portionv l2. The upper and lower grooves i1 and I8 are only for the purpose of supporting tangentially extending conductors, so that the only stress im-posed on these portions is the weight of. the extended conductors. Having provided the grooves l5 and it for accommodating dead-ended conductors, the lateral strength of. the body portion H! at the grooves l1 and I8 isnotan important consideration, and for this reason they may be. made relatively deeper and wider than the grooves. l5 and l6 to accommodate tangentially extending conductors of large diameter.

To reduce. the length of. tie. wire. required, and.

in. addition to provide. an improved tie-wire arrangement, the

end portions

13 and 14 are provided, at. the elevationsv of the grooves l1 and [8, with. the horizontally positionedv openings 19 and 2 0. As shown. in Fig. 4, these openings accommodate the. tie wires 31 and 32, for supporting the tangentially extended. conductors 29 and 30. This feature. of. the invention is particularly valuable in connection with the support of the lower conductor 30, since the tie wire may become loosened in service, but will not permit releasing. of. the conductor, such as might occur in the event the conventional tie-wire arrangement in. which the. wire is wrapped around the groove I8 is. employed, as has been. common. practice heretofore- The. support of. the present invention may be conveniently and inexpensively constructed of wood, for example, and. the base H made integral with the body portion 10. In some situations it may be desired. to reduce end-grain exposure, and construct the support with minimum amount of material. In such situations. the base I I may be. separately formed, to register with one side of the square central portion l2, and. positioned to extend outwardly therefrom in a direction normal to the vertical plane in which. the tie wire. openings [9 and 29 are positioned- A pair of vertically spaced

prongs

22 and 23 are arranged to extend outwardly from points within the central portion I.2 through and beyond the base II, and it is in. this manner that the base. ll may be: fastened to the body portion I0. An attaching-bolt opening 2| extends horizontally,- preferably through. the midpoints of both the body portion Ill and. the. base II, and, as shown in Fig- 4,. the. attaching-bolt 25 extends therethrough and through the pole 24. As the nut. 25 is tightened. on. they attaching-bolt 25-, the prongs 22. and. 23. enter the pole. In this condition, the prongsextend on each sideof thebase respectively into the body portion I0 and the pole 24, thereby effectively preventing rotation of either the base I l or the body portion l in the event of unbalanced tension of the tangentially extended conductors 29 and 30.

From the above description, it will appear that the construction exemplified herein provides a high degree or use of the material involved, resulting in an eilicient, simple and inexpensive structure for the purpose stated.

I claim: v

1. A support for electric conductors comprising a longitudinally extending body portion'having a central portion of rectangular cross-section and respective end portions of circular crosssection, a small horizontally positioned groove extending around each of said respective end portions adjacent to the respective ends of said central portion and a relatively large horizontally positioned groove extending around each of said respective end portions adjacent to the respective ends of said body portion, an opening extending through each of said end portions at the elevation of the large grooves, the respective openings lying in a plane which is parallel to one side of said central portion, a base portion secured at said one side of and extending laterally from said central portion, and an attaching-bolt opening extending coaxially through the respective midpoints of said central portion and said base portion.

2. A support for electric conductors comprising a body portion having a central portion and a pair of conductor-receiving portions extending respectively coaxially upwardly and downwardly from said central portion, a horizontally posi tioned groove extending around each of said con- 1 ductor-receiving portions adjacent to the respective ends of said central portion, a relatively wider and deeper horizontally positioned groove extending around each of said conductor-receiving portions respectively above and below the first-mentioned grooves, an opening extending transversely through each of said conductor-receiving portions at the elevation of said wider and deeper grooves, said openings lying in a vertical plane, a base portion secured at one side of said central portion and extending outwardly therefrom in a direction normal to the plane in which the openings are positioned, and an attaching-bolt opening extending coaxially through the respective midpoints of said central portion and said base portion.

3. A support for electric conductors comprising a body portion having a central portion and a pair of conductor-receiving portions extending respectively coaxially upwardly and downwardly from said central portion, a horizontally positioned groove extending around each of said conductor-receiving portions adjacent to the respective ends of said central portion, a relatively wider and deeper horizontally positioned groove extending around each of said conductor-receiving portions respectively above and below the first-mentioned grooves, an opening extending transverse- 1y through each of said conductor-receiving portions at the elevation of said wider and deeper grooves, said openings lying in a vertical plane, a base portion positioned at one side of said central portion and extending outwardly therefrom in a direction normal to the plane in which said openings are positioned, an attaching-bolt opening extending coaxially through the respective midpoints of said central portion and said base portion, and a pair of vertically spaced prongs extending in parallel relationship with each other and with the direction of said attaching-bolt opening from points within said body portion through and beyond the surface of said base portion, said prongs providing means for fastening said base portion to said body portion.

4. A support for electric conductors comprising 7 a body portion having a central portion and a pair of conductor-receiving portions extending respectively coaxially upwardly and downwardly from said central portion, a horizontally positioned groove extending around each of said conductorreceiving portions adjacent to the respective ends of said central portion, a relatively Wide and deeper horizontally positioned groove extending around each of said conductor-receiving portions respectively above and below the first-mentioned grooves, an opening extending transversely through each of said conductor-receiving por tions at the elevation of said wider and deeper grooves, said openings lying in a vertical plane, a base portion positioned at one side of said central portion and extending outwardly therefrom in a direction normal to the plane in which said openings are positioned, an attaching-bolt opening extending coaxially through said central portion and said base portion in a direction normal to said vertical plane, and a pair of spaced prongs extending in parallel relationship outwardly from points within said body portion through and beyond the surface of said base portion, said prongs providing means for attaching said base portion to said body portion.

A support for electric conductors comprising in a single piece of insulating material a body portion having a central portion and a pair or conductor-receiving portions extending respec tively coaxially upwardly and downwardly from said central portion, a horizontally positioned groove extending around each of said conductorreceiving portions adjacent to the respective ends of said central portion, a relatively wider and deeper horizontally positioned groove extending around each. of said conductor-receiving portions F respectively above and below the first-mentioned grooves, an opening extending transversely through each of said conductor-receiving portions at the elevation of said wider and deeper grooves, said openings lying in a vertical plane, a base portion extending outwardly from one side of said central portion in a direction normal to the plane in which said openings are positioned, and an attaching-bolt opening extending coaxially through the respective midpoints of said central portion and said base portion.

6. A support for electric conductors com rising a vertically extending body of insulating material having an intermediate portion, a base portion extending laterally from one side of said intermediate portion, and end portions merging with the respective upper and lower ends of said intermediate portion, a horizontally positioned groove extending around each of said end portions adjacent to the respective ends of said in termediate portion, a relatively wider and deeper horizontally positioned groove extending around each of said end portions respectively above and below the first-mentioned grooves, and an attaching-bolt opening extending coaxially through the respective midpoints of said intermediate portion and said base portion.

RALPH R. PITTMAN.