US1076630A - Supporting structure for trolley-conductors. - Google Patents

Description

H. P. DAVIS & T. VARNEY. SUPPORTING STRUCTURE FOR TEOLLEY GONDUOTORS. APPLIOATION FILED 00T.19I 1904.

1,076,630; Patented Oct. 21, 1913.

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H. P. DAVIS & T. VARNEY. SUPPORTING STRUCTURE FOR TROLLEY GONDUGTORS.

' APPLICATION FILED OCT. 19, 1904. 1,076,630. 4. Patented 0ct.21,1913.

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(MOQLS UNITED STATES PATENT FFQ.

HARRY P. DAVIS AND THEODORE VARNEY, OF PITTSBURGH, PENNSYLVANIA, AS-

SIGNORS T0 WESTINGHOUSE ELECTRIC 6t MANUFACTURING COMPANY, A CORPORA- TION OF PENNSYLVANIA.

SUPPORTING STRUCTURE FOR TROLLEY-CGNIDUCTORS.

To all whom it may concern Be it known that we, HARRY P. DAVIS and Tnnononn VARNEY, citizens of the United States, and residents of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in supporting Structures for Trolley-Conductors, of which the following is a specification.

Our invention relates to apparatus for supporting and insulating overhead trolley conductors, and it has for its object to provide a simple, efficient and durable means for affording proper and satisfactory support for trolley conductors which are utilized for supplying high voltage energy to high speed railway equipments.

In the accompanying drawing, Figure 1 is a side elevation of a trolley pole provided with conductor supporting and insulating devices which embody our invention. Fig. 2 is a detail, end elevation of a ring clamp for making connection between a messenger wire and an insulator. Fig. 3 is a side elevation of a supporting insulator and adjacent parts, a portion of the supporting arm upon which the said insulator and parts are mounted being also shown. Fig. 4 is an end elevation of the parts shown in Fig. 3, the supporting arm being, however, shown in section.

The utilization of high voltage, alternating current energy for high speed railway service demands an overhead structure which is more substantial in many respects and which provides a higher degree of insulation than is afforded by structures which have heretofore generally been used in railway work. Our present invention has been designed and is specially well adapted for high tension, alternating current service, but it is equally well adapted, so far as operating conditions are concerned, to lower voltages and to direct currents as well as to alternating currents.

The apparatus here shown as embodying our invention is utilized in connection with a single line or set of trolley poles arranged along one side of a single-track road or between the two tracks of a double-track road. lVe have shown a single pole 1, to which is rigidly fastened, at the proper height, one end of a horizontally projecting arm 2, this arm being shown in Figs. 1, 3 and 4 as an Specification of Letters Patent.

Application filed October 19, 1904.

Patented Get. 21, 1913.

Serial No. 229,178.

iron or steel tube of annular cross-section. Upon the arm 2, at a distance from the pole 1 corresponding to approximately the center of the track-provided a trolley is tobe employed which is centrally located on the car,-we locate an adjustable insulating support 3, the insulator portion of which may be a tube or cylinder 4 of porcelain or other suitable non-conducting material having the requisite strength and insulating properties and preferably having surface corrugations that are formed by one or more circumferential grooves 5 and alternating annular projections or ribs 6. The insulator 4 may be mounted upon and securely cemented to a metal sleeve 7 that fits loosely upon the arm and projects beyond each end of the insulator to form a substantially semi-cylindrical member 8 of a two-part clamping sleeve. The other part 9 of the clamping sleeve is provided with laterally projecting arms 10, the outer ends of which are provided with sockets 11 to receive the ends of outwardly and downwardly projecting, U- shaped guard wires or rods 12 and with bolts 13- for clamping the ends of the wires or rods 12 in the sockets. The two parts 8 and 9 of the clamping sleeve are clamped together around the arm 2 by means of a U-shaped wire or rod 14, the ends of which project through suitable openings in the corresponding arms 10 and are provided with clamping nuts 15. By reason of the loose fit between the sleeve 7 and the arm 2, the device 3 may be adjusted along the arm 2 to any extent desired, provided the clamping nuts 15 are loosened.

The trolley conductor 16 is supported at the desired distance above the track by means of a messenger cable 17 that is, in turn, supported from the insulators 4 so as to assume catenary curves between the said insulators. The wires or rods 12 extend beneath and around the messenger cable and serve the double purpose of arresting the fall of the cable in case one of its supporting devices breaks and of preventing injury to the insulator by the trolley in case it slips from the trolley conductor and flies upward under the action of the means employed for holding it in contact with the conductor. The hangers 18 which connect the trolley conductor to the messenger cable may be of any character suited to the service and need not be here described, since they do not constitute apart of our present invention. The messenger cable may be supported from each or the insulators l by means of a two-part hanger 19, whichis clamped rigidly around the cable by means of bolts 20 and is provided with a double hook forming a ring 21 that is received in an opening 22 in a twopart ring clamp 23 of such diameter as to surround and fit the middle portion of the insulator l. The two parts of the ring clamp 23- have a hinge connection at their lower ends by means of the ring 21 and their upper ends'are respectively provided with an eye 24 and a hook 25 so that the device may be readily applied to the insulator and as readilyremoved when desired.

In order to securely support and brace the arm 2 in a horizontal position, we may provide a brace arm 26, the inner and lower end of which is securely attached to the pole 1, preferably by means of a hinge connection 27 as indicated, and the upper and outer end of which is provided with a tubular head 28 which surrounds the arm 2 and is locked thereto by a set-screw 29 or other suitable} locking or clamping device. 5

In order to'steady the trolley wire against; lateral'swing'or vibration, we provide a rod '30:, one endof which is attached to the trol-j 'ley conductor by a suitable'clamping device;

31 and the other end'of which is hinged to a clamping ring 23 which constitutes a part or an insulating and supporting device 3 that corresponds, in all respects, to the device 3 with which the arm 2 is provided, eXcept that the U-shap'ed wires or rods 12 and the means for supporting them are omitted.

It will be understood that the device just described not only afior'ds an efiective safeguard against lateral swing or vibration or the trolley conductor, butjals'o effectively insulates the conductor from the supporting brace arm 26.

Instead of connecting the steadying rod 30 to the brace arm 23, it obviously might be connected to some other part of the supporting structure, if desired. o

The details of the invention may be still further varied, as regards the form and dimensions of parts and also as regards the cooperating relations of certain of the elements, without departing from our invention. I

lVe claim as our invention:

1. An overhead structure for electric railways comprising. a pole, a laterally projecting arm provided with an insulator, a detachable clamp surrounding said insulator, a messenger wire or cable loosely supported from said clamp and U-shaped guard wires or rods that project outwardly and downwardly from the supporting arm around and beneath the messenger wire or cable.

2. An overhead structure for electric railways comprising a pole, an arm projecting laterally therefrom and provided with an adjustable insulator, an auxiliary support for saidarm, a messenger wire or cable supported from sald insulator and U-shaped guard wlres or rods GXtQIlCllIlg downwardly and outwardly from the supporting :arm 7 around the messenger wire or cable.

3. In an overhead structure forelectric railways, the combination with a rod or bar, of a porcelain tube having a sleeve which surrounds the rod or bar and to which, the tube is cemented, said sleeve having projecting ends, clamps for fastening the projecting sleeve ends to the rod or bar, and U-shaped rods that project outwardly, and downwardly from said clamping devices.

4. In an overhead structure for electric railways, the combinationwith a pole, an arm projecting laterally therefrom, an insulator mounted upon said arm, an, auxiliary support between said arm andjthe pole, a messenger wire or cable' det-achably suspended from said insulator, a trolley conductor suspended from said messenger wire or cable, and U-shaped guard wires or rods that extend from the ends of the insulator around and beneath the messenger wire or cable.

5. In a catenary suspensionv for trolley wires, an arm, an insulator supported there on, a guard for said insulator, a messenger wire supported by said insulator, a trolley wire from'said messenger wlre.

In testimony whereof, we have hereunto 100 subscribed our names this 8th day of Octo- 'be'r',1904[. I

HARRY P. DAVIS.

THEODORE VARNEY.

Witnesses:

CAROLINE SMYERs, CARL P. NAoHoD, BmNEY HINEs;

opi'e' of this patent ina'y be obtained. for five ce'iit s each, by addressing the Commissioner of Patents,

Washington, ,D. C.

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