US738919A - Suspension of trolley-wires. - Google Patents

Description

PATEN-TED SEPT. l5, 1903. M. T. A. KUBIERSGHKY & P. HERKNER.

SUSPENSION 0F TROLLEY WIRES.

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UNITED STATES Iiatented September 15, 1903.]

PATENT OFFICE. i v

MARTIN T. A. K UBIERSCHKYAND PAUL HERKNER, OF BERLIN,

` GERMANY.

SUSPENSION OF TROLLEY-WIRES.

SPECIFICATION forming part of Letters Patent No. 738,919, dated September 15, 1903.

Application iiled June 8, 1903. Serial No. 160,611. (No model.)

leyWires,-of which the following is a speci-- fication.

The present invention relates to the suspension of electric trolley-wires,vand has for its object to provide a flexible suspender to which the ends of the wire may be securely 'and adjustably connected and readily disconnected.

The invention will be readily understood upon reference to the following description and the accompanying drawings, forming a part of this specification, in which- Figure 1 is a part elevation and part sectional view of a connection-ear embodying one form of our invention. Figs. 2, 3, and 4 are cross-sections thereof, taken on the lines 2 2, 3 3, and 4 4 of Fig. 1; and Fig. 5 is a part elevation and part sectional view of a sectionf insulator embodying our invention.

The connection-ear shown' in Figs. 1 to 4 comprises a continuous trough 1, having a circular groove 2 therein ladapted to receive the ends of the trolley-wire 3 and integrally connected on each side of a central open space 4 to a bridge portion 5, provided with a threaded hole 6 for engagement with the usual insulated suspension-bolt. The metal of the trough portion 1 is gradually reduced from its connection with bridge portion 5 toward its respective ends in order to render the ear more iiexible, and at the ends the sides of the trough are extended upward and.

united to form closed rings 7. The lower surface 8 ofthe bridge portion slopes outwardly toward the bottom of the'trough to form key-seats'.

The means for securing the ends of the wire in iixed relation with the ear comprises pairs of keys 9 and 10, one of which, key 10, is provided with teeth or corrugations 11, adapted'- to. engage corresponding teeth or corrugations 12 in the side of the wire, and both keys are arranged with their thinner ends directed outward beneath the sloping under surface of the bridge portion 5. According to this arrangement the end of the wire 3 may be placed in its desired position with relation to the ear and key 9 driven outward, forcing the toothed key 10 into permanent engagement with the wire and wit-hout disturbing the relative position of the wire to 'the ear. Should the wire tend to draw outward in service, either one or both of the keys 9 and 10 will be drawn with it and correspondingly increase the frictional resistance.

The ring'portions 7 at the ends of the ear are provided with means for binding the trolley-wire in contact with the bottom of the trough, and, as shown inthe drawings, this means consists of a single key 13, Vdriven in between the inner surface of the ring and the wire and bent up at its end to prevent its workin g loose.

1n the section-insulatorshown in Fig. 5the metallic end portions 15 and 16 are mechanically connected by an insulating-strut 17, provided at its center with means for attachment to the guy-wire, the insulated turnbuckle-bolts 18 19, and the runner 20. The metallic end portions 15 and 16 have open grooves for the reception of the ends of the trolleywire, with their outer ends provided with vclosed ring portions 21, their inn'er ends and 16 is reduced toward their outer ends to render them flexible, so that the trolley-wire carried thereby will .not be abruptly iieXed at the ends of the clamping-Suspenders.

When it is desired to take up the slack in the wire, stretching-clamps are applied in the usual manner and the'pairs of attaching-keys 9 10 or 24 25 removed and replaced, with the toothed key advanced one or more notches on the wire and the plain upper key replaced and driven home, and in case it is desired to slacken the wire the toothed key will be accordingly stepped back one or more notches on the wire.

We do not desire to restrict ourselves to the particular form or construction of parts shown and described, since it is apparent that they may be changed and modified without departing from our invention.

What we claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination of a trolley-wire snspender having a key-seat and a groove for the reception of an end of the Wire, and a pair of keys located between the wire and said keyseat and adapted when displaced by the tension of the wire to exert increased clamping eiect thereon.

2. The combination of a trolley-wire suspenderhavinga key-seatand a groove forone end of the wire, and a pair of keys located between lhe wire and said seat, one of said keys being provided on one side with teeth or corrugations to engage said wire and the other key having plain surfaces and adapted to be driven between said seat and the first key.

3. The combination of a trolley-wire snspender having a key-seat and a groove for an end of the Wire, and a pair of similarly-directed keys located between the wire and said seat and adapted when either or both is displaced by the tension of the Wire to exert increased clamping effect thereon.

4. The combination of a trolley-wire snspenderhavingr an end gradually reduced in cross-section and provided with a groove for an end of thewire, a key-seat, a pair of similarly-directed keys located between the wire and said seat, and means for holding the outer end of said suspender in contact with the wire.

5. The combination of a trolley-wire ear having a grooved trough for the reception of the ends of the wire, a bridge portion provided on its under surface with key-seats, and integrally connected at its ends with said trough with an intervening opening, and pairs of outwardly-directed keys located between the ends of the wire and said seats.

In Witness whereof we have hereunto set our hands this 27th day of May, 1903.

MARTIN T. A. KUBIERSCIIK Y. PAUL HERKNEK.

Witnesses:

WOLDEMAR HAUPT, HENRY HAsPER.

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