US1185700A - Insulator for trolley-wires. - Google Patents

Description

B. C. MOSS.

INSULATOR FOR TROLLEY WIRES.

APPLICATION FILED JAN. 11. 1915.

1 1 85,700. Patented June 6, 1916.

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UNITED sTATEs PATENT OFFICE.

BENTON C. MOSS, OF KANSAS CITY, MISSOURI, ASSIGNOR OF ONE-HALF T0 CHARLES C. FRITTS, OF KANSAS CITY, MISSOURI.

INSULATOR FOR TROLLEY-WIRES.

Application filed January 11, 1915.

To all 'w ham it may concern Be it known that I, BENTON C. Moss, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Insulators for Trolley-Vires, of which the following is a specification.

This invention relates to insulators for trolley lines and has for its object to produce an insulator which is of universal application in the sense that it can be used at all the important points in trolley lines where heretofore several different insulators have been employed.

I Vith this object in view the invention consists essentially in the provision of a rounded insulator provided with a peripheral groove, a central passage extending at right angles to the groove, and shoulders at opposite ends of the passage,-the shoulders being preferably produced by grooving opposite faces of the insulator, and in order that the invention may be fully understood reference is to be had to the accompanying drawing, in which Figure 1, is a plan view of an insulator embodying my invention, for connecting a span wire with a trolley wire supporting ear of well known construction. Fig. 2 is a section on the line IIII of Fig. 1.. Fig. 3, is a horizontal section of a trolley pole, and shows one of my improved insulators utilized as a means for connecting a collar on said pole to the outer end of a span for supporting a trolley line. Fig. 4, is a side elevation of the same. Fig. 5, is an elevation showing the use of a plurality of my improved insulators in the span wire for a high tension system trolley wire. Fig. 6, is a view of the same taken at right angles to the view shown by Fig. 5.

In the said drawing, 1 indicates an insulator of porcelain or other suitable nonconducting material. In the preferred construction, this insulator is of elliptic form and is provided in its curved surface or edge with a circumferential groove 2. It is also provided with a central passage 3 extending in a plane at right angles to the plane of the circumferential groove and at its ends in the plane of the flattened parallel faces 4 which faces are preferably produced by providing the insulator with straight grooves extending clear across the insui Specification of Letters Patent.

Patented June 6, 1916.

Serial No. 13633.

lator as shown clearly, the said grooves being wider than the passage 3, and forming shoulder 55 for a purpose which hereinafter appears. \Vhere the insulator is of elliptic form which is the preferred type, the grooves extend longitudinally.

In Fig. 1, the span wire (3 is bowed at 7 and fits in the circumferential groove and to secure it reliably to the insulator an oppositely bowed tie bar 8 engages the circumferential groove at the opposite side from the bowed portion of the span Wire and terminates in hooks 9 engaging the span wire and clamping the insulator firmly in place.

10 is the customary ear for the support of the trolley wire 11, the ear having an upwardly projecting central boss 12 provided with the usual threaded socket 13 shown in dotted lines and adapted for engagement by the bolt 14- extending loosely through the passage 3 of the insulator and adapted to clamp the latter upon the upper end of the boss. To guard against accidental unscrew ing of the bolt, a locking device such as a spring washer 15 is interposed between the head of the bolt and the insulator, it being noted that the boss and the locking device are seated upon the flat faces 4 of the insulater, which faces are sufficiently wide to accommodate said parts. The washer is incapable of turning completely around because it is provided with a spur 16 adapted to engage one of said shoulders i. or the other. The looseness with which the bolt extends through the insulator is to accommodate the greater expansive property of the bolt so that there shall be no danger of the expansion of the latter resulting in the cracking or breaking of the insulator.

Figs. 3 and 4:, illustrate the insulator used as a connection between one of the ends of the span wire and a trolley pole 17. In this construction the span wire encircles the insulator by fitting in the groove thereof and is secured reliably by twisting adjacent or doubled portions of the wire together, though of course any other means may be employed for securing the ends of the wires. 18 indicates a common form of collar mounted upon the trolley pole and terminating in parallel arms 19 fitting in the grooves of the insulator, and to secure the latter reliably in place, a bolt 20 extends through its passage 3 and said arms 19 and is engaged by a retaining nut 21. In Figs. 5 and 6, the span wire is shown in sections each bein secured to one of a pair of insulators in the manner shown in Figs. 3 and l, and to connect the pair of insulators, parallel bars 22:. extend through the alined grooves in the corresponding faces of the insulators and are secured to the latter by bolts and nuts 21 as in Figs. 3 and 1-. The insulator can also be used with the single pullover span wires, s .ch as employed when the trolley wire turns corners or is otherwise deflected from a straightcourse. In this case the span wire may be attached. to the insulator as shown by Fig. 3, the short trolley wire ear necessary to accommodate the curvature of the trolley wire being attached to the insulator as shown by Figs. 1 and 2.

In all the uses of the insulator, the elliptic form for the same is preferred, because an insulator of that form has no tendency to rotate under the pull or tension of the span wire.

From the foregoing it will be apparent that I have produced an insulator which can be employed in any connect-ion relating to spirit and scope of the appended claims, and do not desire to be restricted to the exact construction, proportion or arrangement of parts shown.

I claim:

1. An insulator of elliptic contour in plan view, provided at its upper and lower sides with channels extending through its major axis, the bottoms of said channels being Hat and parallel; said insulator having a central through-passage opening at its ends in said channels, and a circumferential groove intermediate its upper and lower sides.

:2. An insulator of elliptic contour in plan view, provided at its upper and lower sides with channels extending through its major axis, the bottoms of said channels being flat and parallel, said insulator having a central through-passage opening at its ends in said channels, and a circumferential groove intermediate its upper and lower sides, in com bination with supporting means, comprising parallel parts fitting in said channels and a bolt extending through said parts and the said passage and securing the insulator nonrotatably to said parts.

In testimony whereof, I afiix my signature, in the presence of two witnesses.

BENTON C. MOSS. \Vitnesses H. C. RODGERS, G. Y. THORPE.

Copies of this patent may be obtained tor five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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