US868843A - Metallic cross-arm for telegraph or telephone poles. - Google Patents

Description

WELLINGTON S. CLAY, OF HUTOHIN SQN, llllN-NESQTAL METALLIC CROSS-ARM FOR TELEGRAPH OR TELEF'HONE. POLES.

Specification of Letters Patent.

Patented Oct. 22, 1907.

Application filed September 7, 1906. Serial No- 333,602;

To all whom it may concern.-

Be it known that LAVELLINGTON S. CLAY, a citizen of the United States, residing at Hutchinson in the.

county of McLeod and State of Minnesota, have invented certain new and useful Improvements in Metallic OrossArms for Telegraph or Telephone Poles; and I do hereby declare the following to be a full, clear, and cxact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved metallic cross arm for telegraph and telephone poles, and t this end it consists of the novel devices and combinations of devices hereinafter described and defined .in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts Jugs 7 throughout th 0 several views.

Referring to the drawings :Figure l is a plan view with some parts broken away, showing the improved cross arm applied to a telegraph pole. Fig. 2 is an (510- vation of the parts shown in Fig. 1. Fig. 3 is a transverse section taken on the line 9: :0 of Fig. 2. Fig. 4 is a plan view showing oneend portion of the cross arm, and Fig. 5 is a transverse section taken on the line 2: x of Fig. 2. i i

The numeral 1 indicates an ordinary telegraph or telephone pole. The metallic cross arm 2 is in the form of a channel iron bar positioned with its back or vertical web against the pole, and with its flanges projetting in horizontal-planes, one over the other.

The numeral 3 indicates a yoke-like clamp which embraces about the pole and engages about one-half thereof, and the arms of which are turned outward in reverse directions, and are perforated to pass therethrough short bolts l. The bolts 4 are passed through perforations 5 in the Web of the cross arm 2, and they are provided with nuts 6 which, in the preferred arrangernent, engage the inner surface of the vertical web of said cross arm, and are held against rotation by ment, the-nuts o are tightened upon the boltsd by applying a wrench to the heads of the bolts. When the nut bolts are tightened up, the clamping yoke 3 will be tightly drawn up against the pole, and the said pole Will be tightly clamped between the said yoke and the back of the cross arm. To securely anchor the cross arm and the yoke to the pole, a barb 8 is pressed outward from the back of the vertical web of said arm and is pressed into the pole, and the yoke is provided, preferably both at its upper and lower edges, with inwardly turned barbs 9 tliat are also'prcssed into the pole. A lag screw 10 is also preferably passed through a perforation inthc yoke 3 and screwed into the pole. By the means described, the cross arm will be very firmly anchored to the pole. in fact, by the arrangesccurcd on said cross arm. With: this arrange- 'bolts passed through the ends 'of ment described, the cross arm may be so securely an- I with laterally projecting heads 12 that are adapted to be inserted through slots 13 in the ,web of the cross arm when turned parallel therewith, and which are adapted to be interlocked to saidcross arms, when said braces arcturned into the angular positions shown in Fig. 2. The lower ends of the bracing arms 11 are preferably lapped and secured to the pole by a lag screw 14.

The insulating caps 15 are, as shown, secured to their wooden supporting pins in the tisualway' These sup porting pins 16 are made quite long, and are passed through vertically alined perforations zontal flanges of the, cross arm 2. The said pe'rforations 17 are formed withirregular surfaces, or with inwardly projecting barbs that are pressed slightly downward, so that the pins 16 may be quite readily driven through said perforations, but will be held firmly 17 in the h0ri-.

against displacement, or in other words, so that they cannot be readily Withdrawn from the said perforations or seats 17.

A cross arm of the above characterfs not only much stronger and more durable than the wooden cross arms usually employed, but thdy may be applied to apole" with much less labor, and in very much shorter interval oftime. Furthermore, the said cross arms may be quickly removed from a pole, and may be used over and over again, almost indefinitely.

What I claim is 1. The combination with a metallic dross arm for a tele-.

of means for detachably securing graph or telephone pole,

said cross arm to the po e, and bracing arms having parts that interlock with said cross arm at their upper ends by angular movement, and securnblo to the pole at their lower ends, substantially as described.

'2. The combination with a channel shaped metallic cross arm for a telegraph or telephone pole, of a clamping yoke extending half way around said pole and having approximately parallel end extensions with out turned extremities, and nutted clamping bolts passed through the out, turned extremities of said clamping yoke and through the vertical web of said cross arm, substantially as de scribed.

The

combindtlon with a channel shaped metallic cross arm for a telegraph or telephone pole, the same having slots 13 in itsvcrtical Web, of a clamping yoke, nuttcd said clumping yoke and through the vertical wcb of said cross arm. and bracing arms 11-, having at their upper ends laterally projecting heads 12, arranged to be interlocked with said. slots 13 by angular movemenls of said arms 11; substantially as des'r-l'ilictl. i

Ill-5 Q, Seems 4. The cbmblnation with a channel shaped metallic cross arm for a telegraph or telephone pole, the same hav- TFtlng a barhprojccting frcm the back of its web and en- Qgageahle with the phle, a clamping yoke having barbs engageable with the pole, and nutted bolts passed through the ends of said clamping yoke and through the vertical web of said Clp arm, substantially as described,

5 A\ channel shaped metallic cross arm for a telegraph or telephone fpdle, provided with vertically alined pin seats 1'7, formed with inwardly projecting barbs for en- 10 gaging and'holding the pins, substantially as described.

In testimony whereof I atfix iny signature in presence of twowltnesses.

WELLINGTON s. CLAY.

Witnesses:

MALIE Honn,

F. D. MERCHANT.

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