US1122326A - High-potential insulator. - Google Patents

Description

L. STEINBERGER.

HIGH POTENTIAL INSULATOR.

APPLICATION FILED AUG. 10, 1912.

1,122,326. Patented Dec. 29, 1914 W \h /3? g f r 3 5/ 0 t 23 f ?6 \i -Q? h \1 9 a9 /6 \A? A5 P7 WITNESSES I INVENTOH m V [I I f 1 anion LOUIS srnrnnnnenn, on. NEW YORK, NY.

HIGH-POTENTIAL INSULATOE.

Application filed August 10, 1912. Serial n6. 714,273.

T 0 all whom it may concern:

Be it known that 1, Louis STErNBnRGEn, residing at Brooklyn, in the county of Kings, city and State of New York, have invented certain new and useful Improvements in High- Potential Insulators, of which the following is a specification.

This invention relates to a high potential insulator of the pin type, designed to possess very high dielectric qualities combined with a' minimum of material and weight, and having a maximum of mechanical strength.

Among the more important objects of the invention may be enumerated the following: I. To improve the construction of high voltage insulators and their means of attachment. H. To provide an insulator of the above type which will be less likely to fracture or puncture should abnormal potentials, such as might be caused by lightning, strike the line. HI. To provide a line supporting insulator with detachable means adapted to be interchanged with parts of varying sizes and designs, for altering the surface distance between the ends of the insulator, and to efiectively guard against the passage, of currents through the joints between the main body of the insulator and said detachable means. IV. To provide an insulator comprising independently formed parts of insulating material, and to construct and adapt the joints between said parts so as to more elfectively prevent passage of current through said joints. V; To design the joints between the parts so that the efiectiveness of the joint for resisting the assage of current does not depend upon a precise prescribed adjusted relation between the parts, and to provide means for adjusting said parts relatively to each other. VI. To provide attaching means upon the, lower portion of the body of the insulator adapted for attaching the insulator to a suitable support, and to form the attaching means so that the secondary hood may be readily moved downwardly from the insulator body and upon said attaching means when desired. VII. To provide an improyedreinforcing means for the body por tion of the insulator. VIII. To provide a pin. type insulator, having a cylindrical body portion of insulating material, with a reinforcing member contained therein adapted to serve as auxiliary attaching means for the insulator. IX. To provide a Specification of Letters Patent.

Patented Dec, 29, 1914.

pm type insulator, having a cylindrical body portion of insulating material, formed with a protecting hood adjacent its upper end, wlth a separately formed member adustable along said cylindrical body into supporting relation with said hood, and to provide an improved reinforcing. means for said cylindrical body in the vicinity of greatest strain from the supporting member. X. To provide an insulator comprising independently formed parts of insulating material, and to so construct and relate the several parts as to facilitate the ready and convenient assembling and disassembling thereof.

Other objects and aims of the invention, more or less broad than those stated above, together with the advantages inherent, will be In part obvious and in part specifically referred to in the course of the following description; and the scope of protection contemplated will appear in the claims.

in the accompanying drawing I have illustrated a side elevational view, partly in section, of one embodiment of an insulator constructed in accordance with the provisions of this invention.

Since insulators of this class, adapted for sustaining very high voltages, are, of necessity, massive, often reaching 20 or more difliculty, however, in providing an insula.

tor composed of independent parts lies in the fact that the joints between the parts usually provide localities for collecting dust or moisture, and this dust or moisture, forming .a conductive path between the parts, destroys the effectiveness of the additional parts, so that while the insulator may appear, and may be constructed for the purpose of being, capable of resisting very high voltages, because of the added parts thereto, yet these added parts lend little or no effectiveness in resisting the passage of currents, and the probable destruction of the whole insulator follows the applicationof heavy voltages, as frcm a charge of lightning or otherwise, to the supported line.

The oil pocket or pockets illustrated in 5, connection. with this application are designed to positively overcome the presence of conductive paths intermediate the two or more parts of a built-up insulator struc-v ture, as described, and the method and arrangement of parts, as disclosed in the embodiment illustrated herewith, are such as. to readily enable the application of, an -ad ditional part=to the base insulator structure, for increasing the surface distance between 1-5 insulator shown. The addedpart, there'being one only illustrated, is readily adjusted for exposing the opposing surfaces of the base and added part, so that the insulating 2o liquid employed may be easily placed in Y position, and the joint illustrated remains effective for resisting the passage of currents even should the added part be not adjusted into its precise prescribed position.

Referring to the drawings, the numeral 1 indicates a. substantially cylindrical body portion of a pin type insulator, said body portion being somewhat longer than wide, and being formed at its upper end with a transverse groove 2 in which the conductor 3. is adapted to rest, as clearly illustrated. An annular groove 4 .is preferably formed in the material of the bodyportion 1 adjacent its upper endadapted to retain a wire 5 such as may be employed for binding about the conductor for pos'itively retaining the conductor in the groove 2, all as will be readily understood in the art. The lower end of the body portion 1. extends into a metallic sleeve 6 which projects below the body of the insulator and is threaded internally as at 7, and adapted thereby to have detachable engagement with a suitably threaded enlarged extension, or stud, 8 of a bolt 9 wh ch is extended through the crossa-rm or'other support 10, for the insulator. One or more nuts 11 are threaded upon the lower end of the bolt 9 for drawing the extension 8 thereof against the upper surface of the cross-arm -10.

The lower end ofthe body portion 1 of the insulator may be fixed within the sleeve 6 in any suitable manner, but is preferably formed with external, coarse, threads 12 mating with threads 13 formed interiorly of the encircling portion of the sleeve 6,

whereby it mav be detached from said sleeve, if desired. An aperture 14 is preferably vformed in the upper surface of theextcnsion 8 of the bolt 9, and a stiff, preferably' metallic, reinforcing rod or dowel 15 /extends into said aperture. and projects above the upper surface of the extension 8 to .a point somewhat above the plane of the upper end of the sleeve 6, being receivedm its upper and lower ends as in the pin; type an aperture 16 formed in the material of the insulator body portion 1, the rod thus serving to effectually reinforce the body 1 against fracture at the point where the body 1 enters the sleeve 6. Though this rod is described as being separately formed, it may obviously be made as an integral extension from the bolt 9, or it maybe molded fast in the body of the insulator and depend thereform into the aperture in the bolt, its function being the same in either instance.

Adjacent the upper end of the body portion 1 is preferably provided an annularly projecting main or protective hood 17, preferably having its uppersurface flaring outwardly and downwardly from just beneath the annular groove 4. The under-surface of this hood is formed, in the present instance, with a. plurality of annular grooves 18 disposed concentrically thereof about the body portion 1. Intermediate the grooves 18'the material of the hood depends to form a pair of-annular ridges 19.

Above the upper end of the sleeve 6, the body portion 1 of the insulator is of substantially the same diameter as the exterior of the sleeve, and said body portion and sleeve are threaded so that, when the sleeve is properly adjusted, the threads of the body portion, as 20, will continue uninterruptedly from the threads of the sleeve, as 21, and upwardly, along the body portion, to a point near the under-surface of the protecting hood 17. 7

The secondary hood or added part il-lustrated comprises a suitable ring-shaped body portion -or collar 22 threaded interiorl'y to engage the threads 20, 21 of the sleeve and body portion of the insulator proper. The upper surface of the secondary hood is formed preferably with a plurality of pockets 23, one for each of the pendent ridges 19 on the protecting hood 17'. The cross-sectional contour of the pockets 23. is considerably larger than the crosssectional contour of the ridges 19, so as to leave an appreciable spacebetween the sides of said ridges and the adjacent portions of the pockets in order that the insulating fluid 24 carried within the" pockets may have ample bodvbetwen the opposing faces of said pockets and ridges.

Intermediate and upon opposite s des of the pockets 23 the material of the secpndary hood is formed into upwardly extendmg annular ridges 25 arranged to fit snugly w1thin the annular grooves 18, and these rldges are preferably provided with apertures 33,

closed by plugs 34, also of insulating material), whereby to' form relief vents from the pockets, the plugs being easily blown secondary hoodillustrated, an annular flange 26 is formed upon the body portion 22 thereof and flares outwardly and downwardly and serves also for protecting the under-surface of the hood, which undersurface is preferably formed with a plurali ty of skirts 27, 28 and 29, arranged concentrically about the body portion 1 of the insulator proper in the assembled structure, the hood 29 being next adjacent the outer periphery of the flange 27 and being of greatest depth, and the skirts 28 and 27 being intermediate the skirt 29 and the body 1 of the insulator and being preferably of successively reduced proportions. Upon the under-surface of the outer annular portion of the protecting hood 17, is arranged a plurality of pendent skirts 30, 31 and 32, of successively reducing proportions, similar to the skirts 2?, 28 and 29, and both of said sets of skirts being adapted to prevent passage of moisture along the under-surface of the respective hoods toward the center of the insulator.

From the structure thus set forth, it is apparent that an insulator is provided, of the pin type, having'a relatively long, solid insulating body portion, supported at its lower end and adapted to support a conductor at its upper end, and being of such proportions as to interpose a considerable body of insulating material intermediate the conductor and the nearest parts of the metallic members comprising the attaching means for the insulator, amply sufiicient to prevent puncturing through the body of the insulator. to said metallic attaching .members.

The secondary hood not only serves as a means for increasing the surface distance between the ends of the insulator, but serves also as a brace Ior the relatively large protecting hood 1? down to substantially'the upper end of the sleeve 6. and, since the rod 15 reinforces the body 1 at this point, it is apparent that an exceptionally rigid structure isprovided.

In the use of the insulator described, the secondary hood may be first placed upon the body portion of the insulator and adjusted therealong until the ridges 25 seat within the grooves 18, whereupon the lower portion of the body of the insulator may be inserted within thesleeve 6 previously attached to the bolt 9, or the secondary hood may be threaded over the sleeve 6 and the insulator; proper subsequently inserted within the sleeve, ineveryinstance the threads 20, 21

of the sleeve and insulator .body 1 beingcontinuous so that the secondary hood may be'readily adjusted from one to the other and thus facilitate inspection, refilling, cleaning, eto.,-of thepockets 23 and cooperating parts.

As manychanges could be made in this portion forming a construction without departing from the scope of the following claims, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative only and not in a limiting sense.

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

1. An insulator having attaching means, said attaching means comprising a metallic sleeve attached to the insulator body, and a reinforcing member extending through said sleeve and beyond the same into the insulator body.

2. An insulator having attaching means said attaching means comprising a metallic sleeve encircling a pendent portion of said insulator, and a reinforcing member extending through and beyond said sleeve into said insulator.

3. An insulator having a reduced annular shoulder, attaching means for the insulator comprising a sleeve encircling said reduced annular portion,

and a reinforcing member extending through said insulator adapted to reinforce the same adjacent said shoulder.

at. An insulator having a reduced annular portion forming a shoulder, attaching means for the insulator comprising a sleeve encircling said reduced annular portion, and reinforcing member within said sleeve, extending through the encircled portion of the insulator and into a part thereof beyond said sleeve so as to reinforce the insulator against fracture at the point of said shoulder. v

5. An insulator comprising a solid cylindrical body portion of insulating material, an attaching member therefor, and a protective part for the insulator movable 1on gitudinally along the length of said cylindrical body and adapted to travel therefrom onto said attaching member.

6. A pin type insulator comprising a solid cylindrical body portion of insulating material, an attaching member therefor, and a protective part for the insulator adapted to be rotated about said cylindrical body and about said attaching member for eflecting longitudinal adjustment relatively to said bod a 7. an insulator comprising acylindrical bodv portion having threads upon its outer surface, a separately formed sleeve carried by said body portion having its outer surface threaded and means whereby said sleeve is adjustable to dispose its threads as continuation of thethreads on said bodv portion, and a collar adjustable along saidcontinuing threads.

8. A pin-type insulator comprising a protective part, and .an integrally formed columnar body portion of insulating material said integrally formedcolumnar body portion having threads upon its outer surface, a separately formed annular reinforcing member for the insulator adjustable along said threads, and a liquid seal between said insulator protective part and said reinforc-- ing member.

9. In an insulator, the combination of a body portion, independently formed attaching. means therefor, and a separately formed member carried by said body portion for increasing the surface distance between parts thereof, said separately formed member being adapted to be moved into supported position upon said attaching means at will for the purposes set forth.

10. In an insulator, the combination with independently formed attaching means therefor, comprising a threaded sleeve with which said insulator detachably engages, a, separately formed member carried by said insulator for increasing the surface distance between parts thereof, said member being adapted to be rotated about said insulator and sleeve for effecting an adjustment thereof into supported relation with said sleeve when it is desired to detach said insulator from said sleeve.

11. An insulator comprising an elongated body portion of insulating material supported at one end, and having a reinforcing member extending for a distance inwardly along its length from the supported end, said insulator being formed with a protective part intermediate its ends, a brace member extending from the vicinity of the inner end of said reinforcing member and engaging said protective part, and a second reinforcing member extending longitudinally through said elongatedbody portion in the vicinityof the inner end of said first reinforcing member.

12. An insulator comprising a cylindrical body portion of insulating material supported at one end, and having a reinforcing sleeve extending for a distance upwardly along its length from the supported end, encircling said body portion, an enlarged annular protective hood formed upon said body portion above the end of said sleeve, and an annular brace member encircling said body portion and extending from the vicinity of the upper end of said sleeve into engagement with said hood at a point spaced from said body portion.

13. 'An insulator comprising a cylindrical body portion of insulating material supported at one end and having a reinforcing sleeve extending for a distance. upwardlyalong its length'from the supported end, encircling said body portion, an enlar ed annular protective hoodformed upon said body portion above the end of said sleeve, an annular brace member encircling saidbody portionand extending from the vicinity of the upper end of said sleeve into engagement with said hood at a point spaced from said body portion, and a reinforcing rod embedded in the material of said body portion extending axially through said sleeve and for a distance thereabove for reinforcing said body against fracture in the vicinity of the upper end of said sleeve.

14. An insulator comprising a cylindrical body portion of insulating material supported at one end and having a reinforcing sleeve extending for a distance upwardly along its length from the supported end encircling said body portion, and liaving a por tion depending therebelow, an'enlarged annular protective hood formed upon said body portion above the end of said sleeve, an annular brace member encircling said body portion and extending from the vicinity of the upper end of said sleeve into engagement with said hood at a point spaced from said body portion, a reinforcing rod embedded in the material of said body portion extending axially through said sleeve and for a distance thereabove for reinforcing said body against fracture in the vicinity of the up: per end of said sleeve, and said rod also having a portion depending below said body and coiiperatin with the pendent portion of said sleeve to form anattaching means for the insulator. l

15. In a pin type insulator, the combinameans for the pin type insulator comprising a metallic rod extending into mating depressions formed in said pin type insulator and in said support, and a reinforcing sleeve encircling a part of said pin type insulator tion with a suitable support, of attaching having opposed substantially flat surfaces contacting, of means for attaching said pin type insulator to the support comprising it separately formed member extending ll'ltO mating depressions in said pin type insulator and in said support, and auxiliary means extending between said insulator and 'support serving to maintain the opposed surfaces of said parts in ing relation.

lZ. The combination with a pin'type insulator and a support therefor, said pin type insulator comprising an elongated columnar body ortion, the lower end of which is formed adapted to engage a substantially fiat surface portion of the support, of means for attaching'said pin type insulator to the support comprising a separately formed metallic member extendin into mating depressions in the elongate body portion of said pin type insulator and in said support, said separately formed metallic member being extended for a considerable distance through substantially contactwith a substantially flat surface the length of the elongated body portion of the pin type insulator so as to serve as a reinforcing means for said elongated body portion, and a sleeve encircling and being connected to portions of said support and elongated body, to serve as an auxiliary a ttaching means between the support andthe elongated body.

18. An insulator comprising a cylindrical body portion, an attaching member therefor, and a protective part for the insulator, said cylindrical body and said attaching member being formed with continuing threads, and said protective part being adjustable along said threads.

19. An insulator comprising a cylindrical body portion, an attaching member therefor,

comprising a metallic sleeve on said body adapted for engaging a suitable support, and a protective part for the insulator movable longitudinally along the length of said cylindrical body and adapted to travel there- .from to said attaching member.

20. The combination of a pin-type insulator, and a support therefor, said pin-type insulator' having a cylindrical columnar body,'a separately formed sleeve for attaching the body to the support encircling a por tion of said cylindrical body and projecting from one end of said bodyinto detachable engagement with the support and a reining into depressions formed to receive them insaid body and in said support.

21. As an article of manufacture, a pintype insulator comprising a cylindrical columnar body, and a head molded integrally at the upper end thereof, said body having forcing rod having its opposite ends extend-- threads formed upon its exterior annular surface, and there being a separately formed protective collar mounted upon said body, "having threads engaging the threads on the body so as to be rotatably adjustable longitudinally of the body into and out of engagement with the head, said collar having an annular'pocket in its upper'surface to contain an insulating'fluid, said head having an annular rib depending into said pocket, the upper surface of said collar at opposite sides of said pocket being adapted to engage the under surface of said head when the said columnar body portion so as to be movable toward and from said head, said protective member having means providing a closed liquid seal interposed between said protective member and said head.

Intestimony whereof, I affix my signature in the presence of two witnesses.

LOUIS srninnnnenn.

l Vitnesses:

LEO EIsENBERG,

L/GROSFORD HANDY.

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