US1027710A - Pole cross-arm. - Google Patents

Description

C. G. BTTE.

POLE CROSS ARM. I APPLICATION FILED SEPT. 30, 191i.

' Patented May 28, 1912,

UNITED, STATES PATENT oFFIcE.

CHARLES e. ETTE, or ST. LOUIS,

MIssoURI, ASSIGNOR TO ETTE INVESTMENT coMy ,IPANY, on ST. LOUIS, MISSOURI, A CORPORATION or MISSOURI.

= To all whom it may concern: i

citizen of the United States,

Be litknown that I, CHARIL'ES 'G'-.-E'I'1E, a residing at St. Louis, Missouri, have invented a certain new and useful Improvement inPole Cross- Arms, of which the following is a full, clear,

and exact description, such as will enable others skilled in the art to which it apperftains to make and use the sai'ne.

This .invention relates to cross-arms such as are used on polesfor carrym'g Insulators. Varmusattempts have been madeto reduce the weight and increase the'efficiency of pole cross-arms by using a channelshaped metallic cross-arm equipped with in-,

. sulator-pins; Such structures have not gone into general use, however, owing to the high cost-of manufacture and the amount of labor involved in pins to the cross-arm.

The object of my invention is to provide .an inexpensive and durable means for supporting a largenumber of. insulators which -arespaced the required distance form each other.

\ Briefly stated, nay-invention consists in a channel-shaped metallic cross-arm and insulator-pins projecting upwardly and downwardly from said cross-arm and passing through the horizontal flanges thereof, said pins being preferabl-yformed-from-iron rods which can be shape and provided with lugs or projections pins are formed from that prevent them from rotating and moving vertically in one direction relatively to the cross-arm. Such a structure is inexpensive to manufacture because the insulatorbar iron, preferably round rods, which can be bought in the open market in long lengths and severed into short sections that canbe threaded at one end to receive the insulator heads and also pressed or pinched at certain points so as to form lugs or projections which hold the pins in position. Holes are punched in the flangesof the cross-arm to receive the pins, and the lugs or projections on the pins are sodis- V posed that they prevent the pins from rotat- Ing and moving vertically in one direction,

a separate means being employed for pre ventingthe pins from moving vertically in the opposite direction.

Figure 1 of the drawings is a front elevational view of a pole cross-arm constructed in accordance with my invention;

POLE CROSS-ARM.

p Specification of Letters Patent. Application filed s tember 30,1911.

' trating connecting the insulator- 1n staggered relation ma'nner I am able to mount bent easily into the desired Patented May 28,1912; Serial NO. 652,048.

Fig. 2 is a perspective View of a portion of the cross-arm shown in Fig. 1; Fig. 3 is ail-enlarged side elevational View of one of. the pins; Fig. 4 is a cross sectional viewtaken on the'line 44 of Fig. 3; Fig. 5 is an enlarged side elevational view of a pinofslightly different construction; and F igs.. 6, 7 and 8 are frontelevational views illusother slight modifications of my in vention.

Referringto Fig. 1 of the drawings which illustrate one form of my invention, iLdesher of insulator-pins on a short cross-arm and still maintain the required distance of tenor twelve inches between the insulators Both sets ofpins are preferably formed from round iron rods, and the top and bottom flanges of the cross arm are provided with holesathrongh which said pins pass, as; shown clearlyi n Fig. 2. he upper pins 1 are provided at their up--- per ends with threaded portions for receiving the insulator-heads 1?, and the lower' pins 2 are bent laterally and turned'upwaidy so that the insulator heads 2 mount- 4 ed thereon will be arranged intermediate the insulators on the upper pins. Each pin passes through a pair of alined holes or openings 3 and 4 in the top and bottom flanges ofthe cross-arm, and in the preferred form of my invention, as shown in ig. 1, each pin is provided with a lug or key 5 that enters a notch or recess 6 in one lange of the crossarm and a lug or stop 7 that rests npon'orbears against the other flange of the cross-arm. The lu 5 prevnts the pin from turning or rotating in the cross-arm and the lug 7 prevents the pin from moving vertically in one direction. The notches 6 which cooperate with the lugs 5 on the upper pins 1 are formed at one side of the holes 3 in the top flange of the cross 11o arm, and the holes 4 in the bottom flange of ends of the pins which project the cross-arm are round or of the same cross; sectional shape as the pins. Consequently,

-when the upper pins 1 are inserted in the openings 3 in the top flange of the cross-arm and moved downwardly, the bottom flange of the cross-arm will act'as a stop that 0061;)- erates with the lugs 7. 'on the lower ends of said pins to limit the downward movement of the pins, the lugs or keys 5 which project pins from into the recesses 6 preventing the turning. After theupper pins have been arranged in operative position inthe manner above described they are locked to the crossarm, either by bending the extreme lower ends 1? of the pins laterally, as shown in Fig. 1, or by screwing nuts 1 onto the lower downwardly below the bottom flange of the cross-arm, as shown in Fig. 6. i

The recesses 6 which receive the lugs 5 on the lower pins 2 are formed in the bottom flange ,of the cross-arm so that said lower pins 2 can be inserted from the under side of thecross-arm and pushed upwardly until the lugs 7 at the upper ends of said pins butt against the top flange of thecrossarm, said lower pins being thereafter locked in position either by bending over the extreme upper end portions 2 of the pins, as shown in Fig. 1, or by threading nuts onto the portions of the pins which project upwardly above the top flange of the crossarm. The holes in the flanges of the cremarm which receive the pins can be punched and the lugs on the pins can be formed by pressing or pinching the pins at the desired points so as to force some of the vmetal laterally. Consequently, the cost of manutacturing such a structure isvery low.

While I prefer to provide each pin with a pair of 1ugs5 and 7, as previously described, the same result could be obtained by providing the pin with a rib 8, as shown in Fig. 5, of suflicient length to bear against, one flange of the eross-armand enter the recess 6 in the other flange of the crossarm. .Still another slight change thatco u ld be made without departingfrom the-spirit of my invention is to provide the pins with nuts 10, as shownin Figs,- 7 and 8, for preventing vertical 'movem'ent of the pins in one direction, sa d nuts-being screwed onto;

the upper pins'after they have been passed through the top flange of the cross-arm but before they are inserted in the bottom flange and vice-.versa with the lower pins.

In the structure sho n .inlFig. 1 the cross-arm is provided with 'ten insulatorpins, six being arranged on the upper side of the cross-arm and four on the under side of the cross-arm, but it will, of course, be obvious that the cross-arm'may be provided with any desired number of insulator-pins without departing from the spirit of my invention. The particular: shape and design of the keys and stops on the pins'is also immaterialso far as my broad idea is concerned. I

Having thus described my invention, what I claim as" new and desire to secure by Letters Patent is:

A pole cross-arm provided with laterally projecting flanges having alining openings formed therein, the opening in one of said flanges being provided with a notch or re-J cess, an insulator pin passing through the,

openings in both flanges and consisting of a piece of round iron rod, an integral lug or displaced portion on said pin that projects into the notch in the opening in one flange, and means on the pin that cooperates with the other flange on the cross-arm to prevent the pin from moving vertically.

In testimony whereof I-hereunto aflix my signature in the presence of two witnesses,

this twenty seventh day of September 1911-. I

' CHARLES G. .ETTE;

Witnesses:

. WALTER O. RAITHEL, EDWARD ScHwIoDn.

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