US1783272A - Support for transmission lines - Google Patents

Description

Dec. 2. 1930. A. o. AUSTIN SUPPORT FOR TRANSMISSION LINES Filed May 25 1925 JNVENTOR. 6124;;

A TTORNEYLS' Patented Dec. 2, 1930 UNITED STA ES PATENT OFFICE ARTHUR O. AUSTIN, OF BARBEIRTON, OHIO, A SSIGNOR, BY MESNE ASSIGNMENTS, TO THE OHIO BRASS COMPANY, OF MANSFIELD, OHIO, A CORPORATION OF NEW JERSEY SUPPORT FOR TRANSMISSION LINES Application filed May 25,

This inventionrelates to supports for high potential transmission lines and the relation of the line to the supporting structure, provision being made to minimize the tendency to flash-over between the line and suport. p The object of the invention is to provide means'for controlling the electrostatic field about the transmission line incident to the supporting structure so as to reduce the tendency to discharge between the line and suport. P .The'invention is exemplified in the combination and arrangement of parts shown in the accompanying drawing and described in the following specification and it is more particularly pointed out in the appended claims.

In the drawing Fig. 1 is an elevation of the upper portion of a skeleton steel tower having the present invention applied thereto.

Fig. 2 is a top plan view of the parts shown in Fig. l.

Fig. 3 is a side elevation of the upper left hand insulator support shown in Fig. 1.

Figs. 1, 5, and 6 are elevations respectively of the insulator sup orts on the various crossarms opposite of w ich these figures are located on the drawing.

The supporting tower is made up of a lower or base portion having diverging legs 10 connected together by suitable braces. Above the diverging legs 10 or vertical u rights 11 which continue upwardl from t 0 legs 10 and which constitute attac ent portion commonly called the basket. The uprights 11 are suitably placed in any approved manner as illustrated in the drawin Cross- -basket extends substantia ly in the direction of the length of the line while the other di- -agonal of the square is arranged transversely to the len h of the transmission line.

Since t e field about the conductor is set up by the presence of the tower, the relation 1925. Serial No. 32,713.

of the tower structure to the conductors of the transmission lines is an important factor in the problem of discharge from the conductors to the tower. Where the portion of the tower adjacent to the transmlssion line extends for a considerable distance in the direction of the line, the influence on the field about the line will afiect the line for a considerable distance along the length thereof. It has been found that the tendency to discharge due to the presence of the field incident to the tower may be greatly reduced by the use of insulated flux controls or conductor cages described in my prior Patents Nos. 1,521,743, January 6, 1925; 1,552,664, September 8, 1925; 1,611,871, December 28, 1926; and 1,664,100 March 27, 1928.

If the tower has a portion adjacent the line of considerable width in the direction of the line as such towers have heretofore been arranged, the protective device for preventing discharge in order to be efiective must ex- 1tend for a considerable distance along the In the present invention, the tower'is arranged, however, so as to have a minimum extent in the direction of the line where the tower approaches closest to the line. This will be apparent from Fig. 2 of the drawing from which it will be seen that because of the diagonal position of the cross-arms, the portion of the tower most closely adjacent the line is most restricted, in the direction of the length of the line. This arrangement confines the field incident to the tower to such an extent along the line that it may be eifectively controlled by insulated flux controls or conductor cages. This may be accomplished by insulated flux control members 15 secured to the transmission line 16 as shown at the upper left hand portion of Fig. 1 of the drawing. The transmission line is there illustrated as supported from the cross-arm 14 by a string ofsus ension insulators 17. The line 18 suspended y insulators 19 at the right hand end of the cross-arm 14 is provided with flux control horns 20 having their ends covered with insulators 21. In addition to the horns 20, conductor cages 22 maybe for a short distance in either direction from the tower. The conductors 23 suspended from the opposite ends of the cross-arm 13 is provided with four flux control horns 24 as shown in Fig. 5 and the central portion of Fig. .1. In connection with the lowermost conductor 25, the outer horns are omitted and only a single pair of horns 26, extending inwardly toward the tower are employed.

' It will be understood that other arrangements of flux control members may be substituted without departing from the spirit and scope of the invention as set forth in the following claims.

1. The combination with a transmission line of a support for saigl line which is quadrilateral in cross section, said line being disposed at one side of said support and extending substantially normal to the plane determined by one pair of diagonally opposite longitudinal extending corners of said support.

2. The combination with a transmission line of a skeleton support for said line which is quadrilateral in cross section, said line being disposed outside of said support and extending transversely to the'direction of the plane of one diagonal of said support and flux control means connected with said line to overcome the tendency to discharge incident to the field occasioned by said support.

3. The combination with a pair of transmission lines of a support substantially rectangular in cross section disposed between said lines and arranged with one diagonal plane thereof disposed transversely to the direction of said lines.

4. The combination with a pair of spaced transmission lines of a-supporting structure for said lines which is quadrilateral in cross section and a cross-arm arranged in the direction of the diagonal of said supporting structure and having said lines carried thereby and extending in a direction substantially normal to said cross arm. 7

5. The combination with a skeleton support which is rectangular in cross section of a cross-arm extending transversely of said support substantially in the direction of the diagonal thereof, transmission lines mounted on said cross-arm. atopposite sides of said support and flux controlmembers connected with said transmission lines to prevent discharge between said transmission lines and support.

6. The combination with a skeleton tower having four upri ht supports arranged substantially in the orm of asquare of a crossaI'm disposed diagonally of said square, a transmission line supported on said crossarm outside of said tower and extending sub-- stantially normal to said cross arm and a flux control member connected with said trans- IIllSSlOIl l nes ad acent said cross-armwhich is substantially square in cross-section and a cross-arm carried by said basket and extending substantially in the-direction of the diagonal of said square, suspension i11- sulators supported by said cross-arm at one side of said basket, a transmission line supported by said insulators and extending substantially normal to said cross arm and outside of said basket, a flux control device con nected with said transmission line substantially in registration with the portion of said basket closest to said transmission line and conductor cages extending along said transmission line away from said basket.

8. The combination with a transmission line, 'of a skeleton support for said line which is quadrilateral in cross sect-ion, said line being disposed outside of said support and extending substantially normal to the direction of the plane of one diagonal of said support.

9. The combination with a skeleton support which is rectangular in cross section, of a cross arm extending transversely of said support substantially in the direction of the diagonal thereof and projecting beyond said support at opposite corners thereof, and

transmission lines mounted on said cross arm outside of said support and at opposite sides of said support.

10. The combination with a skeleton tower having four upright supports arranged substantially in the form of a square, of cross arms disposed diagonally of said square, and

transmission lines outside of said tower supported on said cross arms and extending substantially normal-t0 said cross arms.

11. The combination with a skeleton tower having uprights forming a supporting basket which is substantially square in cross section, a cross arm carried by said basket and extending substantially in the direction of the diagonal of said square, suspension insulators supported by said cross arm at one side of said basket, and a transmission line supported by said insulator and extending;

substantially normal to said cross arm outside of said basket.

12. The combination with a transmission line, ofa skeleton tower comprising four upright posts positioned at four corners of said tower, said line being supported by said tower outside of the space enclosed by said posts, the plane determined by two of said posts being substantially parallel with the direction of said line while the plane deter mined by the other two of said posts is sub- J stantially normal to the direction of said line.

13. A support for a transmission line comprising two upright posts spaced apart at their bottom and disposed in a vertical plane, a cross arm attached to said posts substantially within the plane determined by said May, A, D. 1925.

weenie posts, a transmission line carried by said cross arm beyond the space between said posts and substantially normal to the plane determined by said posts, and an additional pair of posts disposed at opposite sides of said plane respectively, and connected with said first named posts and forming with said first named posts a quadrilateral tower for supporting said transmission line. I

14:- A transmission line support comprising four uprightposts forming a rectangular tower, two of said posts disposed at diagonally opposite corners of said tower determining'a vertical plane, a cross arm secured to said posts and projecting beyond said tower, and a transmission line carried by said cross arm outside of said tower and disposed substantially normal to said vertical plane.

In testimony whereof I have signed my name to this specification on this 21st day of ARTHUR O. AUSTIN.

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