US859703A - Insulating-strain. - Google Patents

Description

No; 859,703, PATENTE@ JULY 9, 1907.

L. ST ERGER.

INSULA STRAIN. PPPP IOATION FILED MAY 1. 1906.

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PATENT OFFICE.

OF NEW YORK, N. Y.

IN)SULAfrING-STRAIN.

Specification of Letters Patent.

Patented July 9, 1907.

Application filed May 1, 1906. Serial No. 314,642.

To all whom it 'may concern:

Be it known that '1, LOUIS STEINBERGER, a citizen of the hUnited States, and a resident of the city of New York, borough of Brooklyn, in the 'county of Kings and State of New York, vhave invented a new and lmproved Insulating-Strain, of which the following is a full, clear, and exact description.

My invention relates to insulating strains for the support and insulation of electric conductors and more especially for use in connection with currents of high voltage. v l My more particular objects are to so improve the insulation as to lessen the tendency, under wet Weather or other unfavorable conditions, of a high voltage current to arc over the surface of the insulator, and also to have the insulator act as a turn-buckle vwhen so desired. I

Reference is to be had to the accompanying draw- -ingsforming a part of this specification, in which I ing the'disposition of the hoods relatively thereto; and Fig. 3 is a central section through thc strain, parts,

however, appearing in elevation.

A. 'disk ,4 of insulating material, is made smooth upon its upper surface and is provided upon its lower vsurface with a plurality of annular concentric hoods or petticoats 4, said disk being further provided 'at its outer edge with projections 4b spaced apart and servingas drip edges. Integral with the disk 4 is an upper neck 5 provided with annularhoods 6 superposed one over the other. Also integral with the disk 4 is a lower neck 7 0f substantially frusto-conical form and provided with annular petticoats 8. The lower end 9 of the frusto-conical portion 7 is preferably left thick as shown. A link 1D of metal, having the form of a longitudinal rod, is embedded within the portion 7 and is provided at its lower end with a head 11. Another link 12 which is ofendles's form, is provided with a swivel ring 13 integral therewith, this ring encircling the longitudinal link 10. The upper end of the link 10 terminates in a head 14 which affords an excellent anchorage within the lower neck 7 of insulating material. A. metallic sleeve l5, threaded internally', is provided at its lower end with a head 16 and is embedded within the upper neck 5 so that the head 16 reaches to a point comparatively deep within the disk ll, thus affording` a good anchorage. A screw l? is provided with a thread lS and terminates in an eye 19. This screw is fitted into the sleeve 15, and when turned by means of the eye 19 virtually lengthens or shortens the strain.

It will be observed that both the heads 14 and 1G,

the disk 4 is thicker at the points adjacent to its middle than at its edges.

The annular steps or hoods 6 prevent the accumulation of moisture upon the upper stem 5, for the reason that although the lower edges of these hoods may bccome moistened the moisture cannot'present an unbroken surface and the danger of arcing is thus greatly diminished. My purpose in rendering the disk -i smooth upon its upper side is to prevent the retention thereupon of moisture, soot, dust, ashes, etc. This object is iurther promoted by inclining the upper surface. l find that the projections 4b facilitate the dripping ci moisture from the upper surface of the disk, and also tend tovprevent the drifting oi moisture to the underside of the disk. The annular petticoats 4 not only break up the under surface of the disk, and increase the creeping surface, but also subject theqnoisture to such environment that in order to creep inwardly toward the center from the edges of the disk the moisture must follow'a path which leads upwardly, and this effectively prevents the creeping oi the moisture. This conformity also increases the surface across which surface leakage might occur. The frusto-conical portion 7 being smaller at its bottom than at its top, has tendency to shield its bottom from moisture, and the moisture accumulating upon any part of this body portion is caused to drip therefrom by the action of the petticoa-ts 8; By turning the insulator the strain periorms the function of a turnbuckle.

I do not limit myself to the use of any prescribed materials; I prefer, however, to employ the insulating material'knowniin the art as electrose.. Nor do l limit myself to an insulator constructed exactly as shown, nor to the exact form of either of the separato portions, neither do l limit myseli to any particular combination of these parts, nor to employ in every instance the turnbuckle feature, for the reason that variations may beiiinade by those skilled in the art without departing from the spirit or scope oi my invention.

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

1. An insulating strain, comprising a disk-like member having a. neck integral therewith, said disk-like member and said neck being' of insulating material, a metallic sleeve extending entirely through said neck and having a head embedded within said disk-like portion, a metallic member connected with said disk-like member at a point opposite said sleeve, and a supporting member provided with an eye and engaging said sleeve.

2. An insulating strain, comprising a body portion lmvine; adjacent to its middle a disk provided with a plurality of annular petticoa ts disposed concentrically in relation to each other, said body portion being further provided with necks each having a step conformity, and strain members connected with said necks.

3. As an article of manufacture, an insulating strain comprising a portion having :i wide middle, and terminating in angular surfaces for facilitating theA dripping of moisture, said portion having also a plurality of necks, one of said necks being provided with petticonts, and a .strain member embedded within said last-mentioned neck.

4. As an article of manufacture, an insulating strain comprising a disk-like member of insulating material having a thick middle portion tapering toward its peripheral edge, a metallic strain member embedded within said disklike member and having a portion extending therefrom, and a second metallic strain member connected with said disk-like member at a point opposite said first mentioned strain member.

5. An insulating strain, comprising a disk of insulating material havinga neck integrati therewith, a metallic strain member partially embedded within said neck and extending therefrom, and another metallic member connected with' said disk at :i point opposite said first-mentioned strain member.

l6. Aninsulating strain, comprising a disk oi' insulating material provided with a body portion and with neck portions lntegral therewith, the plane of said disk being :it right angles to the general directionot extension of said neck portions, a metallic strain member embedded in each of said neck portions and extending therefrom, in the guireral direction of said neck portions.

7. An insulating strain, comprising a disk-like portion comparatively thick at its middle and.tlin at its edges. said disk-likeportio'n being provided with necks integral therewith, a fastening member embedded within euch o1' said. necks and one of said fastening members extending entirely through one of said necks and being provided with a head disposed toward the center of said disk-lilal member, the other of said fastening members being disposed :it a point opposite said last-mentioned fastening member.

In testimony whereof I have signed my naine to this specification in the presence of two subscribing witnesses.

LOUIS STEINBERGICR.

Witnesses z WAI/rox Hannisox, Evi-:kann D. MARSHALL.

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