US1194690A - Telephone and telegraph pole construction - Google Patents

Description

H. E. ADAMS.

TELEPHONE AND TELEGRAPH POLE CONSTRUCTION.

APPLICATKJN HLED FEB.19.1914.

1,1 94,690. Patented Aug. 15, 1916.

HAB-RY E. ADAMS, OF PITTSBURGH, PENNSYLVANIA.

TELEPHONE AND TELEGRAPH POLE CONSTRUCTION.

Specification of Letters Patent. Patented Aug. 15, 1916.

Application filed February 19, 1914. Serial No. 819,640.

To all whom it may concern:

Be it known that I, HARRY E. ADAMS, a

citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Telephone and Telegraph Pole Constructions, of which the following is a specification.

This invention relates to telegraph or telephone poles and it has for i s object the provision of an improved device of this character constructed in such manner as, in the case of new poles, to protect the parts thereof from the action of theweather and to provide such a construction of the insulators that there will be no danger of the insulated elements becoming detached from the cross arms of the pole, or in the case of old poles to provide such a structure as will enable parts of the old and rotted cross arm to be used to support the new elements forming the subject matter of the present invention.

Further objects and advantages of the invention will be set forth in the detailed description which now follows. 7

In the accompanying drawings, Figure 1 is a side elevation of a pole constructed in accordance with the invention, Fig. 2 is a transverse sectional view through the cross arm, upon line 22 of Fig. 1, Fig. 3 is a detailed perspective view of a bracket adapted to be secured directly to the side of the pole, Fig. 4 is a ,detailed perspective view of an insulator supporting plate hereine fter described, and Fig. 5 is a perspective view illustrating the metallic sheathing for one of the cross arms.

Like numerals designate corresponding parts in all of the figures of the drawing.

Referring to the drawing, the numeral 5 designates a telephone or telegraph pole and 6 one of the usual cross arms thereon. One of the largest items of expense that confronts a telephone or telegraph company is the continual replacement and repair of the cross arms such as are illustrated at6, said "cross arms becoming rotten from exposure to the weather. Sometimes it may'be that the ordinary wooden pin usually employed to screw the glass insulators upon rots away and breaks loosefrom the cross arm letting the wires secured to such insulators move to one side or the other and become crossed with the remaining wires upon the cross arm.

In carrying out the invention I provide a metallic cross arm which is illustrated in Fig. 5. This cross arm is made of sheet metal and comprises the sides 7, the bottom 8 and the top 9. The top and sides are crimped together in such manner as to form flaring flanges 10 and the sides are crimped at the bottom to form flanges 11. The purpose of the flanges 10 and 11 is to constitute a means for engaging an insulator supporting plate 12. These plates are provided with the flanges 13 at their edges said flanges being of hook-like formation and adapted to take over either the flanges 10 or 11 according to whether the plate is to be mounted upon the top of the cross arm or the under side thereof. Plates 12 are provided with upstanding tubular members 14 which are internally threaded at 15 for the reception of the insulators 16. These insulators are formed of glass and are threaded at 17 for engagement with the screw thread 15 of the tubular members 14.

The cross arm illustrated in Fig. 5 is provided at suitable intervals with openings 18 which register with the tubular members 14 so that when the insulators 16 are screwed into position the lower ends of these insulatorsenter said recesses and prmnt' endwise movement of the plates 12' with relation to the cross arm.

The operation of this device is as follows: When the device is to be used in connection with the repair of old cross arms and it is found that the old cross arm has become so rotten that it may no longer be depended upon to hold the insulator carrying pins securely in place these old pins are cut off and if desired a portion of the cross arm may be cut away, particularly if it be found to be in a badly rotted condition. Then the tubular cross arm or sheathing shown in Fig. 5, is slipped into place upon the old wooden cross arm, and thereafter or prior thereto as may be desired, the plates 12 are engaged with the flanges 10 and 11 and the insulators are screwed into position to hold said plate against movement.

The tubular cross arm shown in Fig. 5, is provided with an upstanding flange 20 by means of which it may be secured to the pole 5; through the medium of fastening .devices 21. The tubular cross arm shown in Fig. 5 may also be used in conjunction with new wooden cross arms in WhlCh case it will be made of suflicient length to cover the entire cross arm before the cross arm is placed in position upon these poles." It is apparent that this merely involves making the structure shown in Fig. 1 a little longer. Fig. 3 shows a bracket 22 with flan es 23 which serves the same purpose as the anges 10. The bracket 22 carries upstanding ears 2& for the reception of fastening devices 25 by which the brackets may be secured to the face of the pole. When a plate such as is shown in Fig. 4: is slipped upon the flanges 23, it is apparent that member 1a thereof serves as a receptacle for a glass insulator by means of which a wire may be supported directly from the body of the pole instead of from a cross arm. In rainy weather it sometimes happens that a wire will come partly or incompletely in contact with a cross arm or the water running down the parts will form a partial ground. These partial grounds are very difficult to locate while a positive ground may be very easily located and I utilize the structure herein shown and described to form a positive ground in any casewhere the Wire becomes etached from the insulator and rests upon the cross arm. By virtue of the fact that the structure shown in ig. 5 is a metallic structure, if the wire comes in contact therewith and this metallic structure be grounded as is illustrated at'25 in Fig. 1, it is. apparent that the wires will be positively grounded at this point. Such positive. ground may be easily located in the usual manner from the central oflice and it is therefore only necessary to direct the lineman to go to that particular pole and correct the evil.

The herein described structure will save an enormous amount of money every year to the telephone and telegraph companies. It may be cheaply and economically manufactured and it will not only save money in cross arms but it will also save a great deal from the standpoint of the labor required to place this device in position, rather than to take down a cross arm and put a new one in its place. If a cross arm is found to be badly diseased it is only necessary to out off the outer end thereof leaving the main body of the arm still secured to the pole and to then slip the structure shown in Fig. 5 upon the remaining stump of the arm and secure it in place in the manner set forth.

While the elements shown and described are well adapted to serve the purposes for which they are intended, it is to be under- Having described my invention, what I claim is:

1. In a device of the character described, the combination with a pole supported member, of a plate, interengaging flanges carried by said plate, and said pole supported mem ber, a tubular insulator receiving member carried by said plate, said pole supported member being provided with recesses adapted to register with the insulator receiving member of the plate so that an insulator screwed into said insulator receiving member may enter said recesses.

2. A plate having engaging flanges at its edges and Jan insulator receiving member upstanding from its upper face, said insulator recelvin member being of tubular formation an being internally threaded, the openings through said tubular member extending entirely through said plate, and a pole supported member, said pole supported member having a plurality of re- .cesses formed therein with which the tubular insulator receiving members are adapted to register.

3. In a device of the character described, the combination'with a pole and its usual wooden cross arm of a metallic sheathing constructed to slip over said cross arm,

HARRY E. ADAMS. Witnesses:

R. E. MARSHALL, F. G. CAMPBELL.

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