US1695007A - Hanger for electric wires - Google Patents

Description

Dec. 11, 1928.

C. A. CAWOOD HANGER FOR ELECTRIC WIRES Filed April 18, 1927 Patented Dec. 11, 1928.

UNITED STATES teesom PATENT OFFICE.

CLARENCE A. CAWOOD, OF BIG STONE GAP, VIRGINIA, ASSIGNOIR, 'lOv THE ELECTRIC RAILWAY EQUIPMENT COMPANY, OF CINCINNATI, OHIO, A. CORPORATION OF OHIO.

HANGER FOR EiJECTRIG WIRES.

Application filed April 18, 1927.

This invention relates to trolley wire suspension fixtures of the type used in mlnes for suspending overhead electric trolley and feed wires from insulated hangers.

An object of the invention is to reduce the cost of manufacture of trolley suspension fixtures by so constructing the elements thereof that the same elements, or some of the same elements, may be utilized for making varlous forms of fixtures.

Another object is to so construct the various fixtures that the parts thereof cannot become disassociated from one another by care less handling or shipment.

Another object is to provide the fixtures with securing means that may be actuated by means of an ordinary wrench such as is commonly used in mines.

These and other objects are attained by the means described herein and disclosed in the accompanying drawings, in which:

Fig. 1 is a side elevational view partly in cross section, showing a fixture centrally suspending a feed and a trolley wire.

Fig. 2 is a cross sectional view on line 22 of Fig. 1.

Fig. 3 is a cross sectional view showing a fixture fitted for suspension at one end thereof.

Fig. 4 is a Fig. 3.

Fig. 5 is a side elevational view of the device shown in Fig. 3.

In the wiringof mines in which electric locomotives are used for transportation, it is generally the practice to dispose the trolley wire for the locomotive close to the side wall 8 of the mine passage. Insome mines the feed wire 10 of the trolley system is carried by the same member supporting the trolley wire, while in others the feed wire is supported from the side wall 8 by separate insulators secured thereto. For the purpose of explanation, it will be assumed that it is desired to rewire the latter mine and install fixtures supporting both the 'feed and trolley wires, utilizing the old hangers 11 already secured in the mine roof 9.

Because of the force exerted upwardly by a locomotive trolley pole upon the trolley wire 9, it is desirable to have the trolley wire disposed directly below the insulated hanger 11 as disclosed in Fig. 5, rather than to one side'of the hanger as shown in Fig. 1 wherein upward force upon the trolley wire 9 tends detail view of parts shown in Serial No. 184,489.

to rock the entire fixture relative to the mine roof. Therefore, in rewiring the mine the structure shown in Fig. 5 is used wherever the old hanger 11 is disposed sufficiently distant from wall 8. However, should the hang er be disposed close to wall 8 as shown in Fig. 1, the fixture shown therein would be used, disposing the trolley wire 9 to one side of hanger llbecause of lack of space between the hanger and wall.

It should be noted that the fixture shown in Fig. 1 is composed of many of the parts used in'the fixture shown in Fig. 5. By thus making the parts interchangeable, the well known advantages incidental to standardization of parts are acquired.

The device shown in Fig. 1 wherein the hanger 11 is disposed close to side wall8, comprises a body member 12 having a central boss 13 provided with a threaded bore 14 for receiving a threadedstud 15 on insulated hanger 11, by'means of which the body portion may be suspended from the roof. One end of the body member is provided with I an annular boss16 having a tapered bore 17 adapted to receive therein correspondingly tapered walls 18 of a pair of jaws 19, which, when drawn upwardly into the tapered bore, move toward one another for clamping trolley wire 9 therebetween. The means for thus drawing the jaws upwardly comprises a stud 20 provided at one end withthreads 21'for receiving a threaded nut 22, and having at its lower end an annular groove 23 which re-. ceives therein an annular flange 24: formed within each of the jaws 19. Referring to Fig. 2, when-nut 22 is tightened, the stud is drawn upwardly and the shoulder 25 abutting the face 26 of the flange 24 serves to raise the jaw 19 and wedgethe tapered portion 18 into tapered bore 17 whereby the ends 27 of the jaws are clamped upon the trolley wire 9.

The opposite end 28 of'body member 12 is provided with an adjustable feeder wire clamp comprising a plate 29 having transverse parallel groves 30 and 31, either of which grooves may cooperate with an up-' wardly extending shoulder 32 on member 12 and with the grooved end 28 of member '12 for clamping a trolley wire. Contact of plate 29 on shoulder 32 provides a fulcrum for plate 29. The size of a feed wire determines which of grooves 30 and 31 is to cooperate with groove or depression 33 in member 12 for clamping feed wire 10. The feed wire is clamped in position by means of a bolt 34 provided with a nut 35. Bolt 34 is received in aligned perforations 36 and 37 in plate 29 and member 12 respectively. The body l1l811l ber 12 is provided with suitable strengthening ribs 38 and flanges 39.

The foregoing description refers to the device suspended from the centrally disposed boss 13 as shown in Figs. 1 and 2, where the hanger 11. is so close to wall 8 that mounting the fixture as shown in Fig. 5 is impossible. In the event that the distance from the hanger to the wall is sufiiciently great, the fix ture shown in Fig. 5 is preferably installed for the reasons previously mentioned.

The fixture shown in Fig. 5 differs from that of Figs. 1 and 2 only in that the jaw actuating means of Figs. 1 and 2 is replaced by the means shown in Figs. 3, 4 and 5, in whichthe jaw actuating means is adapted to receive the threaded stud of hanger 11. Thus, the trolley wire 9 is disposed directly below hanger 11 as shown in Fig. 5. The jaw structure shown in Fig. 3 comprises the usual jaws 19 adapted to be drawn upwardly into tapered bore 17 of boss 16, and a stud having a lowerend identical with that of stud 20. The upper end of stud 40 is bored and threaded as at 41, to receive threaded stud 15 on hanger 11. The upper end is also provided with a hexagonal head 42 adapted to be received in a hollow hexagonal nut 43 swaged onto stud 40 about the head 42 as shown at 44. Shoulder thereby precludes disassociation of the nut 43 from stud 40. It is obvious that when it is desired to install the device just described, it is necessary only to screw the threaded stud of the hanger into the threaded bore 41 by turning nut 43, whereupon stud 40 will rotate and advance up wardly upon stud 15 until nut 43 abuts the lower face 46 of the hanger 11 and the top of 'boss 16. The jaws 19 will then be wedged in the tapered bore 17 for clamping trolley wire 9.

Although the two devices disclosed in Figs. 1 and 5 respectively are intended to be assembled at the manufacturers plant, it should be noted that by dispensing with shoulder 45 on nut 43, the change from center-suspension to end-suspension could be efiected on the job, if desired. It has been found to be more practical, however, to construct fixtures of this kind in a manner such that the various parts thereof cannot be inadvertently disassociated from one another, whereby parts are lost and the fixture becomes useless. It should also be noted that in assembling the fixtures at the factory, similar body members, feed wire clamps, and trolley wire jaws may be used in both fixtures, as these parts are interchangeable. This feature makes possible a great reduction in the cost of manufacture.

It should also be noted that grooves 30 and 31 in plate 29 are of different radii, and that if desired, )late 29 may be reversed to dispose groove 30 into cooperative relationship with depression 33 in member 12 for clamping feed wires of smaller The groove 31 will then receive rib 32 to provide a fulcrum for plate 29.

lVhat is claimed is:

1. In a device of the class described, the con'ibination of a body member having a tapered bore at one end thereof and a central threaded bore for receiving a hanger stud, a feeder wire clamp at the opposite end of the body member, a. pair of trolley clamp jaws associated with the tapered. bore for clan'iping a trolley wire therebetween, and interchangeable jaw actuating means, one being adapted for suspending the body mem her from the hanger stud, and the other for actuating the jaws independently of the hanger stud.

2. In a device of the class described, the combination of a body member having a tapered bore at one end thereof and a central threaded bore for receiving a hanger stud, a pair of trolley clamp jaws associated with the tapered bore fer clamping a trolley wire therebetween, and interchangeable jaw actuating means, one being adapted for suspending the body member from the hanger stud, and the other for actuating the jaws independently of the hanger stud.

3. In a device of the class described, the combination of; an elongated body member adapted for n'iountin g it perpendicularly of a stud, said body having a tapered bore at its end and a threaded bore intermediate its ends, the threaded here being adapted to receive a hanger stud for suspending the body member, a trolley wire clamping means mounted in the tapered bore and adapted to be simultaneously secured to a hanger stud and to clamp a trolley wire, and a feed wire receiving means at the opposite end of the body member.

4. A wire suspending device adapted for mounting on a stud con'iprising a body memher having a threaded bore and a tapered bore spaced therefrom, the threaded bore being adapted to receive a hanger stud for suspending the body member, clamping aws adapted to be moved into binding relation with one another upon movement into the tapered bore and means for simultaneously closing the jaws and securing the body to a stud.

5. A combined feed and trolley wire clamp comprising an elongated body portion having a (ientral threaded bore for receiving a threaded mounting stud, the body portion having a feed wire clamp at its one end, the other end having a bore therethrough for interchangeably receiving a trolley wire clamp arranged for receiving a threaded mounting stud for cooperation therewith for joint mounting of the hanger at said one end and for clamping a trolley wire, and a trolley wire clamp adapted for holding a trolley wire independently of such mounting stud.

6. In a device of the class described the combination of a body member adapted for selective mounting at an end and intermediate its ends, a trolley clamp means operable tov means and a depression, a feeder wire clamp means for accommodating feeder wires of various sizes, comprising a reversible clamp plate provided with a. pair of parallel grooves of different sizes either one of which may cooperate with the abutment means on the body member to provide a pivotal mounting for the plate and the other of which may cooperate with the depression in the body member for receiving and holding a feeder wire, means for retaining the plate in clamped position upon the feeder wire, and a clamp on the body member for holding a trolley wire.

9. In a device of theclass described, the combination of a body member provided with a shoulder and a depression, a feeder wire clamp means for accommodating feeder wires of various sizes comprising a clamp plate provided with a pair of parallel grooves of different sizes,'either one of which is adapted to receive the shoulder on the body member for providing a pivotal mounting for the plate and the other of which is adapted for cooperation with the depression in the body member for receiving and holdinga feeder wire, and means for retaining the plate in clamped position upon the shoulder and feeder wire.

10. In a device'of the class described, the combination of a body member provided on one end with means for clamping and holding a trolley wire, and feed wire supporting means on the other end of the body member comprising'an abutment and a jaw, a reversible clamp plate provided with parallel grooves of different sizes, one of which may cooperate with the abutment on the body member for pivotal mounting of the clamp plate thereon, and another of which may cooperate with the jaw on the body member for receiving and holding a feeder wire of a size corresponding to the size of the groove, and means for retaining theplate in clamped position upon the feeder wire.

11. In a device of the class described, the combination of an elongated body member provided at one end with trolley wire clamping means adapted to be simultaneousely secured to a hanger stud and to clamp a trolley wire, means disposed centrally of the elon gated body member for mounting it on a hanger stud, a feeder wire clamp means on the other end of the body member and adapted for accommodatingfeeder wires of various sizes,'said clamp means comprising an abutment and a jaw on the body member, a reversible clamp plate provided-with grooves of different sizes, one of which may cooperate with the abutment on the body member for pivotal mounting of the plate thereon, and another of which may cooperate with the jaw on the body member for holding a feeder wire of a size corresponding to the size of the groove, and means for retaining the plate in clamped position upon the feeder wire.

12. In a device of the class described, the combination of a body member'adapted for selective mounting at an end and intermediate its ends, and a trolley clamp provided with means for simultaneously clamping a trolley wire and mounting the body member at the said end. 7

In testimony whereof, I have hereunto subscribed my name this 4th day of April, 1927.

CLARENCE A. CAVVOOD.

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