US1078647A - Anchor structure for overhead lines. - Google Patents

Description

-T. VARNEY.

ANCHOR STRUCTURE FOR OVERHEAD LINES.

APPLICATION FILED OUT. 13, 1909.

Patented Nov. 18,1913.

WESSESM I%NTOR Cy BY THEODORE VARNEY, F PITTSBU'MWEL, EE'ENNSR'LVANIA, ASEIQNQW, ifi WKS'EIN'GHDU5E ELECTRIC ANT) MAi TUFIhCTUEING OOMEAEY, A (JQEEGfiATION GE PENNSYLVANIA.

ANCHOR STRUOTUE E EOE K VER'HIEW LINEfi- Serial I l'o. 522,476.

conductor is sus ended, may be securely held under very eavy tension and at the same time electrically insulated from its so port, for high voltages.

Vhen a catenary type of overhead line structure is employed in the electrification of steam railroads and other multi-track systems, it is of great advantage to reduce the number of necessary supports by placing them at relatively long distances apart, making each of them particularly rigid and permanent. Under these conditions, the messenger wires or cables from which the trolley conductors are suspended are subject to very heavy strains on account of their own weight and the weight otthe trolley conductors between supports. At intermediate supporting structures, the lateral strains are largely equalized so that it is only necessary to sustain a downward pressure, but, at the end of the line section, it is necessary to provide an anchor structure to which the messenger cable may be rigidly secured. Since the messenger cables are electrically connected to the trolley conductors and serve as feeder conductors, it is also necessary to electrically separate the inessenger cables from the anchor structure, and, as relatively high voltages are frequently employed in the service above indicated, the requirements for the anchor structure are particularly severe.

According to my present invention, I provide an anchor structure having such an arrangement that tremendous mechanical strains may be sustained and, at the same time, the cables are electrically separated from the support by insulators which are capable of sustaining very high voltages.

Figure 1 of the accompanying drawings is an elevation of an anchor strain terminal constructed in accordance with my inven- Patented or. 18, 1913.

tion, and Fig. 2 is a partially sectional elevation on line IIII of Fig; 1, a portion of the structure being omitted.

. Referring to the drawings, the structurehere shown comprises a horizontal beam 1, preferably of T-section, which is pivotally secured at its inner end to a relatively heavy cross beam 2 and projects outwardly therefrom. A pair of braces 3 and 4 which are bolted together and to the outer extremity of the beam 1 and are separated at their inner ends and are secured to the cross beam 2 at some distance above the point of connection between the beams 1 and 2. A. sheet metal plate 5 is preferably secured to the braces 3 and 4; and constitutes a roof or shed for the protection of the parts below it. A clevis bracket 6 is clamped to the T-beam 1 by means of bolts 7 and it rotatably supports an insulator 8 which is mounted in hooked projections 9 on the clevis. A hanger rod 10 depends from the insulator 8 and a messenger wire or cable 11 is secured to the hanger rod by means of a clamp 12, the end of the messenger wire being connected to the outer end of the structure composed of beams 1, 3 and 4 through a turn buckle 13 and a strain insulator 14. A trolley conductor 15 may be secured to the messenger wire or cable by any suitable means (not shown).

I claim as my invention:

1. An anchor structure for electric lines comprising a substantially horizontal arm or bracket, a clamp pivotally suspended and electrically insulated from said arm or bracket, a wire or cable grasped by said clamp and disposed substantially in the central vertical plane of the arm or bracket, and insulating and tension-adjusting means interposed between the end of the wire or cable and the end of the arm or bracket.

' 2. An anchor structure comprising a substantially horizontal arm or bracket, a clevis adjustably secured thereto, an insulated clamp pivotally suspended by the clevis,a wire or cable grasped by the clam and disposed substantially in the centra vertical plane of the arm or bracket, and a strain insulator and turn buckle interposed between the end of the wire or cable and the end of the arm or bracket.

3. An anchor structure comprising a bracket which consists of a horizontal beam and a pair of angularly disposed. braces the respective encs of, which are secured to one end of the'be: m and to a vertical supporting wall, a cle' 1's bracket adjustably sucured to the horizon al beam, an insulated :lamp pivotally mo-ui ted in the clevis bracket, a wire or cable SK cured in the clamp and disposed substant'i ally in the vertical plane of the horizontal team, and a strain insulator and turn buckle interposed between the end of the Wire or cable and the free end of the 1G bracket. I

In testimony whereof, I have hereunto subscribed my name this 4th day of October,

THEODORE VARNE Y. Witnesses WILLIAM SCHAAKE, B. B. HINEe.

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