US2910261A - Transformer mounting bracket - Google Patents

Description

Oct. 27, 1959 5. J. WARD ETALTRANSFORMER MOUNTING BRACKET 2 Sheets-Sheet 1 Filed Feb. 28, 1958 INVENTORS. SAMUEL J WARD WILL/AM E. HOL/MAN M/LTON C CROSS Oct. 27, 1959 5. J. WARD ET AL 2,910,261

TRANSFORMER MOUNTING BRACKET Filed Feb. 28. 1958 2 Sheets-Sheet 2 SAMUEL J WARD \J WILL/AM E. HOL/MAN MILTON a mass 5 k INVENTORS.

United States Patent TRANSFORMER MOUNTING BRACKET Samuel J. Ward and William E. Holiman, Houston, and Milton C. Cross, Bellaire, Tex.

Application February 28, 1958, Serial No. 718,265

15 Claims. (Cl. 248-230) This invention relates to supports for holding electrical transformers or the like on poles and more particularly to brackets capable of supporting two transformers of the same or different sizes, and means for mounting these brackets on poles.

Transformers commonly used in the transmission of electrical power generally are of one of two sizes. The small size has two mounting connections vertically spaced 12 inches apart and the large size has themounting connections 24 inches apart. Brackets for mounting these transformers on poles generally have been designed to hold one transformer on each bracket. In some cases separate brackets have been provided for attachment to each connection from a transformer, thereby requiring two brackets for each supported transformer.

This invention provides a transformer mounting bracket suitable for supporting a single transformer, a pair of transformers of each size, or one transformer of each size. The mounting bracket has two vertically spaced sections of generally hexagonal shape. Each section consists of an arcuate base member conforming generally to the exterior shape of the pole, a pair of side members extending outwardly from the ends of the arcuate base member, an outer bridging member generally parallel to the arcuate base member, and a pair of plates whose sides are connected to the ends of the outer bridging member and the outer ends of the side membersrespectively. Each plate extends vertically above and below each of the bracket sections and forms a single plate common to both sections. The transformers are fastened to these plates.

The bracket may be secured to the pole by bolts pas-sing through thearcuate members, or by pole-encircling bands fastened to the outwardly extending side members of the bracket so that a substantially closed loop is formed around the pole by the bands and the brackets arcuate base members. By drawing the bands and the bracket together so that the bands and bracket are caused to press tightly against the pole, the bracket will be held in place.

The preferred embodiment of this invention is shown in the drawings which may be better understood from the description which follows. In the drawing-s:

Fig. 1 shows two transformers mounted on a bracket of this invention supported on a utility pole,

Fig. 2 illustrates the side elevation, the bracket supported on the pole by upper and lower sets of pole encircling bands,

Fig. 3 is a front view of the bracket secured to a pole,

Fig. 4 is a plan view of the bracket showing the pole to which it is secured in section, and

Fig. 5 is a perspective view of the bracket.

Thebracket 1, includes, when secured to a pole, upper andlower sections 2, 2 which are generally hexagonal in shape. Each section consists of anarcuate base member 3, 3, a pair ofside members 4, 4, 5, 5 extending outwardly from the ends of thearcuate base members 3, 3', anouter bridging member 6, 6, and a pair of transformer supporting plates, 7, 7 having their side edges connected to the ends of theside members 4, 4', 5, 5' remote from thearcuate base members 3, 3', and to the ends of'thebridging member 6, 6, respectively. Each of thesetransformer supporting plates 7, 7' extends above and below the upper andlower sections 2, 2 and forms a single plate common to both sections.

Thearcuate members 3, 3 are adapted to be secured against the pole and have a radius of curvature the same as that of average size poles. Since poles vary in size, it is desirable to have the bracket conform to medium size poles so that there will be a minimum of difference of curvature between the arcuate member and the pole when the bracket is used with smaller or larger poles.

The vertical plates, 7, 7' which are fastened perpendicularly to the outwardly extendingside members 4, 4', 5, 5 converge toward thebridging members 6, 6' to which they are connected. The plates extend above theside members 4, 4' and below theside members 5, 5.

Theupper bridging member 6 is opposite the lower portion of upperarcuate base member 3 while thelower bridging member 6 is above the lowerarcuate base member 3, although they could be located in other positions if deemed desirable.

8 Eachtransformer supporting plate 7, 7, has fouropenings 8, 8', 9, 9', 10, 10', 11, 11'. Theopenings 8, 8', which are adjacent the upper ends and theopenings 10, 10 which are adjacent the lower ends of the plates and thecenter openings 9, 9 are for receiving thetransformer supporting bolts 12, 12'. Theopenings 8, 10 are spaced 24 inches on center. Thecenter opening 9 is spaced 12 inches on center from each of theouter openings 8, 10.

As shown in Fig. 1, a large size transformer 13, is bolted to one of thetransformer supporting plates 7 through the upper andlower openings 8, 10, withbolts 12, andnuts 14, while asmall transformer 15, is similarly fastened to the other transformer supporting plate 7' through openings 8', 9'.

Plates 7, 7 are inwardly concave so that when thenuts 14, 14 are tightened on thebolts 12, 12' to firmly secure the transformer connections against the outer face of thetransformer supporting plates 7, 7', the force of the-transformer plate against the outer edges of the nut will tend to distort the outer portion of the nut in a direcion away from the transformer supporting plates.

5 This action will tend to cause the threads of the nut to bind against the threads of the bolt and will cause the nut to resist any tendency to turn loose.

Openings 11, 11' are for the purpose of securing a ground connection and their location is not critical. They are conveniently placed in the lower half ofplates 7, 7.

The bracket is mounted upon apole 16, which may have theusual cross-bars 17, for carrying the utility wires. In supporting the bracket from a pole, the bracket may be bolted to the pole. For this purpose,openings 18, 18 are provided in thearcuate base members 3, 3' to receive bolts to pass through the pole. Alternatively, the bracket may be secured to the pole by upper andlower bands 19, 19' which encircle the pole. Each of these bands are formed of a plurality ofarcuate sections 20, each of which has apertured outwardly-extendingears 21, 21 at their ends, so that they may be bolted together about a pole.

Thearcuate sections 20, preferably have the same radius of curvature as that of medium sized poles, i.e. the same as thearcuate base members 3,3 of the bracket.

' The length of each of thearcuate sections 20 is determined by the total length of thebands 19,19 when theseveral sections 20 have been fastened together. The bands are long enough to encircle the portion of the pole curvature as the bands.

" not lying beneath thearcuate base members 3,3 of thebracket 3. The cumulative length of thearcuate sections 20 of each band is less than the distance around to be encircled by the band on a medium size pole. Thus there will be space between theears 21,21 of adjacentarcuate sections 20 when they are fastened together-around a pole, which will permit them to be drawn tightly towards each other so that the bands will tightly grip the pole. Furthermore if the bands are used on a small pole thearcuate sections 20 will not be too long and will not tend to overlap each other.

Theears 21,21 are not radially directed fromarcuate members 20, but are at such an angle that the ears of adjacent arcuate member sections will be parallel when the bands are used on a pole having the same radius of Thus when nuts are tightened on bolts through the openings in the ears the nuts will rest flat against the inside of the ears rather than contacting the car on only one edge of the nut.

- through therespective openings 22,22, 23,23, 24,24

held in place bynuts 26,26. The nuts are tightened up so that the bracket and band sections tightly grip the pole. Theopenings 23,23 are located in the upper portion of theupper side members 4,4 and are below the uppertransformer mounting openings 8,8 inplates 7,7. The

.openings 24,24 are located in the upper portion of thelower side members 5,5 and are above the lowertransformer mounting openings 10, inplates 7,7. By placing these openings in the upper portions of their respective side members, thebands 19,19 which encircle the pole will be partly above the side members to which they are connected. By placing the uppertransformer mounting opening 8,8 above theupper clamping bolts 25 and thelower transformer connection 10,10 below the lower clamping bolts 25', the bracket tends to dig into the pole at its lower edge, as is more fully set out in U.S. Patent 2,761,643. Since transformers may weigh 4,000 lbs. or more the tendency of the bracket to bite into the pole is helpful in resisting the normal tendency of the bracket to slide down the pole.

p In many instances it is desirable to attach the transformers to the bracket on the ground and then to'raise the entire assembly into place on the upper-portion of the pole in one operation. To enable this to be accomplished the upperouter bridging member 6 is provided with anopening 27 through which a hook or similar device may be inserted for supporting the transformerbracket assembly while it is being raised to its position on the pole.

While this support is designed to be used for transformers, it is obvious that it may also be used for supporting other objects of substantial weight on poles.

The description herein sets forth a preferred embodiment of the transformer mounting bracket of this invention. It will, of course, be understood that Various details of construction may be varied without departing from the principles of this invention or sacrificing any of the advantages thereof and it is therefore not the purpose to limit the scope of the patent granted otherwise than by the appended claims.

We claim:

1. A supporting bracket for transformers or the like comprising aligned, vertically spaced, arcuate base members, adapted to be clamped to a pole, spaced side members extending outwardly from the side edges of each of the arcuate base members, a pair of transformer-support- 75 7 ing plates extending vertically in substantial parallelism, each of said transformer-supporting plates having one edge thereof attached to the respective edges of the side mem bers remote from the spaced arcuate base members, and spaced bridging members having the ends thereof attached to the other edges of said transformer-supporting plates to space the transformer supporting plates in symmetrical relationship.

2. A supporting bracket for transformers or the like as set forth inclaim 1 in which said side members have openings through which fastening means may pass for securing said bracket to a pole.

3. A supporting bracket for transformers or the like as set forth inclaim 2 in which said openings in the side members extending from one of said arcuate base mem bers are located near the free edges of said side members on the same side of said side members and in which said openings in the side members extending from the other of said arcuate base members are located near the edges thereof remote from the edges of the first side members near which said openings are located.

4. A supporting bracket for transformers or the like as set forth inclaim 1 in which said arcuate base members have openings through which fastening means may be passed to secure the bracket to a pole.

5. A supporting bracket for transformers or the like as set forth inclaim 1 in which said transformer-supporting plates have openings through which means for connecting transformers tothe plates may pass.

6. A supporting bracket for transformers or the like as set forth inclaim 5 in which said transformer-supporting plates are curved in the area thereof having saidopenings. 7. A supporting bracket for transformers or the like as set forth inclaim 5 in which one of said openings is located in each of the end portions of each of said transformer-supporting plates.

8. A supporting bracket for transformers or the like as set forth inclaim 7 in which an opening is located in each transformer-supporting plate intermediate said openings in the end portions of said transformer-supporting plates.

9. A supporting bracket for transformers or the like as set forth inclaim 7, in which said side members have openings through which fastening means may pass for securing said bracket to a pole and in which said openings in the end portions of said transformer-supporting plates are located outwardly from said openings in said side members in the direction of the length of said transformer-supporting plates.

: 10. A supporting bracket for transformers or the like asset forth inclaim 1 in which said transformer-supporting plates converge outwardly from said spaced side members. 1

11. A supporting bracket for transformers or the like as set forth inclaim 1 in which said spaced bridging members are substantially parallel to said arcuate base members.v

12. A supporting bracket for transformers or the like comprising an arcuate base member adapted to be attached to a pole, side members extending outwardly from the respective side edges of the arcuate base member, a pair of transformer-supporting plates, each of said transformer-supporting plates having one edge thereof attached to the respective edges of the side member remote from the base member, said transformer-supporting plates converging outwardly from said side members towards one another, and a bridging member having opposite edges thereof attached to the other edges of said transformer-supporting plates,

13. A supporting bracket for transformers or the like asset forth inclaim 12 in which the transformer-supporting plates have openings through which means for connecting transformers to the plates may pass, and said of having said openings.

5 6 14. A supporting bracket for transformers or the like References Cited in the file of this patent as set forth inclaim 12 in which said side members diverge UNITED STATES PATENTS outwardly from said arcuate base member.

15. A supporting bracket for transformers 01 t like 3 55:5 5u 1 2; f 1 r J A y as set 01th in claim in Wmcn saidbndgmg member 0 W616 43Ward Sept 4, 1956 is generally parallel to said arcuate base member.

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