US1194957A

US1194957A - Insulator

Info

Publication number: US1194957A
Authority: US
Publication date: 1916-08-15
Anticipated expiration: 1933-08-15

Description

H. H. COCHRANE.

ms'uLAToH.

v APPLICATltlN' FlLED APR. 21, 1915.

Pat'ented Aug. 15, 1916.

NVEN'U'? Harry H. Cochran ATTORNEYS UNITED sTATEs HARRY HAMILTN COCHRANE, OF BUTTE, MONTANA.

INSULATOR.

Specication of Letters Patent.

Patented Aug. 15, 1916.

Application filed Apri'121, 1915. Serial No. 22,831.

To all whom. it may concern.'

Be it known that I, HARRY H. COCIIRANE,

" a citizen of the United States, and a resi dent of Butte, in the countyl of Silver Bow and State of Montana, have invented a new and Improved Insulator, of which the fol lowing is a full, clear, and exact description.

My invention relates to insulators and has reference more particularly to insulators for electric currents of high potential.

The object of the invention is to provide Aa simple, strong, etlicient and durable insulator characterized by the provision of a central insulating core of fibrous nature sealed in replaceable, protective, insulating shells so that the core therein is protected 'from atmospheric influence.

With the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement of parts as herein fully described, illustrated and claimed.

In the accompanying drawings, forming 3 part of the application, similar characters et reference indicate corresponding parts in all the views.

Figure 1 is a. vertical, central section through my insulator; Fig. 2 yis a horizontal section on line 2 2, Fig. 1; and Fig. 3 is a similar section on line 3-8, Fig. 1.

Referring to the drawings, 4 represents a fibrous rod, preferably 'of hickory. This rod constitutes the core of the insulator.

' The ends of the rod 4 are reduced and therethe diameter of the rod, so that the same lits snugly over the rod. At one end of the tubular section a concave-convex Iiange 1l is provided which depends from the tubular section and which forms the petticoat oi the shell. Located within the petticoat is an annular collar 12 concentric with the tubular portion 10 and`of a diameter' such as to engage the end of a successive shell 9. The engagement between the collar 12 and the tubular portion 10 of the successive shells is such thail sufficient play therebetween is lett to accommodate cement. In view of the fact that the inner diameter of the collar 12 is greater than the inner diameter of the tubular portion, an annular shoulder 13- is formed within each shell.

The metallic cup 5 at one end of the core receives a metallic cap 14 which is threaded on to the cup 5 and the outer diameter of which cap 14 is substantially equal to the outer diameter of the tubular portion 10 of the shell, so that the same will tit loosely into the collar of a shell 9 placed on to the core to engage the cap. The shoulder 13 of each shell carries a gasket 15, preferably formed of an insulating material, such as paraffin, pitch or bitumen,l which seals the contacting ends of the successive shell as well as the engaging end of the cap 14. The

space between the cap 14 and the collar is closed by cement of insulating character, as is also the space between the successive tubular portions and the collars in engagement therewith, as shown in Fig. 1. Secured to the cup 5 at the other end of the rod 4 is a cap 16 which has a central recess 17 of sub stantially the same diameter as the inner diameter of the collars 12, so that the same will accommodate the tubular portion 10 or the shell adjacent the said end where the cap 1G is provided. The clearance in the recess is also cemented, so that the core is perfectlyr sealed within the series of shells and the caps carried by the ends of the core. Vllhere` fore, the same is insulated from the atmos` phere, and, consequently, will not be a llected by the changes thereof and will be immune from humidity, which is the cause ot' many troubles in insulators for currents otl high I potential.

The

caps

14 and 16 are each provided with a staple 18 whereby the entire insulator can be supported and attached to cariv the conductor. The fibrous core is preferably impregnated with an insulating compound. such as oil or paraiin. rlhe transverse re;

` sistance ot such a core is very great, as the fibers are disposed longitudinally. It is substantially inflexible, and, consequently,"

rod, metallic cups crimped if) he ends of the rod, if" u' ehi-111g ere-ilona enge@ ing the rod, 110mm@ 'ihreade enga gement W i ih ih e intermedee the tu eniing tbe L the @am pose Cil WIS iT and means rated with an nsuaing compound and forming the cere, tubular insulating sections tng snugly on to the rod, each of Seid sections having a. petteeut and un annular collar Within the petteozvh adapted to f1eeommodate the end of the succeeding See- -on7 am insulating gasket within the :mmv ler edler, ,metallic cups crimped 'to the ends of the rod, metallic caps in threaded engagement 'with the, cups :1nd in engagement with the adjacent tubular seuion's, und means sealing the @ennemi-ion between the engaging seelons und the sectens engaging the caps.

testimony whereof l beve Signed my 31eme to this s eefeuon in the presenee of EWG Subscribing witnesses.

ses: y. C. TUJLOTSON, ACOB AUTHOMESEN.