US1177996A - Insulator. - Google Patents

Description

W. J. CURRY & W. A. ANDREWS.

INSULATOR.

APPLICATION FILED MN. I, 1915.

1,177,996. Patented Apr. 4, 1916.

3 4Q {a 15' N WI Carr Wflflndrews,

- I afl'omm t CO., WASHINGTON, D- C.

, UNITED STATES PATENT OFFICE.

WILLIAM J. CURRY AND WILLIAM A. ANDREWS, OF EAST LIVERPOOL, OHIO.

INSULATQR.

a To all whom it may'concern:

Be it known that we, WILLIAM J. CURRY and WILLIAM A. ANDREWS, citizens of the United States, residing at East Liverpool, in the county of Columbiana and State of Ohio, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

T his invention relates to electrical insulators, and more particularly to that class comprising two counter part sections arranged, when assembled, to grip and hold between them the wire to be supported and insulated. Ordinarily, such devices are provided axially with a nail opening and'in their opposing faces at each side of the said opening with wire receiving grooves or similar wire gripping surfaces. Such a construction presents the disadvantage, however, that the insulation is liable to be worn from the wire allowing the wire to come tact with the nail.

7 without likelihood of becoming fractured 4O will be firmly and securely gripped and held or chipped. I

.-Another aim of the invention is to so form the wire gripping surfaces of the sections comprising-the insulator that the wire against slipping and yet without likelihood of the'insulation being damaged.

In the accompanying drawings: Figure 1. is a perspective view of the insulator embodying the present invention. Fig. 2 is a vertical sectional view through the insulator, the sections being shown assembled. Fig. 3 is a similar view illustrating the securing nail and the wire also assembled with the sections. Fig. 4 is a group perspective view of the sections in position about to be assembled. Fig; 5 is a perspective view illustrating the manner .in which the conductor wire may be afforded additional support.. f

Specification of Letters Eatent Patented Apr. 4, 1916.

Application filed January 7, 1915. Serial No. 1,008. g

Corresponding and like parts arereferred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters. I

As before stated, the insulator embodying the present invention comprises counterpart sections between which the conductor wire is to be gripped. Each of the said sections comprising the insulator includes a body portion 1 which may be cylindrical, as here shown, or rectangular, as may be desired,

for approximately one-half its length. Throughout the remaining portion of its length, the outer surface of the section is substantially semi-cylindrical, the flat face 2 thereof,however, being inclined and occupying a plane bisecting the longitudinal axis of the section. This last mentioned portion of the section is indicated by the numeral 3. The end face of the portion 3 and the inner end face of'the body portion 1 constitute the wire gripping surfaces of the section, and the said face of the body portion 1 is formed with :a substantially semi-annular groove 4 which terminates at its ends at the' base of the inclined side 2 of the portion 3. This groove results in a semi-annular gripping flange 5 which ex.- tends at the outer edge of the said end face ofthe portion 1 and which of course constitutes one wall of the said groove. The other wall of the groove is'defined by the surface of a boss 6 which is concentric to the said flange'5. A nail opening 7 is formed in the portion 1 of the section and opens through the bottom of the groove 4 and through the under or outer face of the said portion land extends part way into the boss 6. The bottom wall of the groove is formed with a series of gripping ribs or corrugations 8, which series extends around the upper end of the said opening 7, as shown in Fig. 4 of the drawings. The inner end of the portion 3 of each section is provided with a transversely "extending recess or groove 9 which is transversely concave and the intermediateportion of the bottom wall of which'is longitudinally convex, as indicated at 10, the said portion 10 being formed:

with transversely extending ribs or corrugations 11. The section is formed with an opening 12, corresponding in function to the opening 7, and this opening 12 terminates at its outer end at the base of the section and at its inner end at the middle of the portion 10. In order to permit of the insulator being disposed withthe outer end of either of its sections abutting against the surface upon which it is to be supported, and the insulator being firmly held in place, even though the surface be more or less uneven, the outer or basal end of each section is provided with a plurality of lugs 13.

Figs. 2 and 3 of the drawings illustrate clearly the manner in which the insulator sections are to be assembled and by reference to these figures, it will be observed that, when the sections are in assembled relation, the inner end of the portion 3 of each section Will oppose the inner end of the body portion 1 of the other section. It will further be observed by reference to the said figures, that the openings 7 and 12 are located at opposite sides of the longitudinal axis of the insulator or, in other words, these openings in each section are located at opposite sides of the middle of the inner end of the section considered as a whole.

.Figs. 1 and 3 illustrate the manner in which a'conductor'wireis to be disposed between the sections, and byreferenceto these figures, it will be observed that the said wire. indicated by the numeral 14, is laid within the groove 4 in one section and securely clamped against the wall of the groove and between the flange 5 and the boss 6 by the ribbed surface of the portion 10 and by the walls of the groove 9. It will therefore be apparent that the conductor wire is kinked in the directionof'the outer side or circumferential surface of the insulator and also in the direction of one end thereof, and that for this reason it will be securely and firmly held and prevented from slipping longitudinally between the sections comprising the insulator. WVhen the wire has been thus disposed between the sections, a nail or other securing element 15 is inserted through the openings in the sections, other than the ones'which terminate at the gripping surfaces between which the wire is.

placed. It will be apparent therefore that the nail or other securing element is located a greater distance from the gripped portion of the conductor wire than would be the case if but a single nail opening were provided and located axially of the insulator, and that furthermore, there is a maximum thickness of the insulating material between the securing element and the gripped portion of the wire. It will also be apparent that, inasmuch as the inner face of the portion 3 of each section is inclined or obliquely disposed, these surfaces will firmly contact when the sections are assembled and the insulator, as a whole, will possess greater strength than if the said surfaces were located in planes at right angles to the ends of the respective sections. It will be understood'of course that, inasmuch as the sections are of counterpart form, the

securing element may be passed through either of theopenings provided for its rep V Fig. 5 illustrates the manner in which the insulator may be employed when it is desired to afford additional support or anchorage for the conductor wire. Inthis instance, the conductor wire is disposed between the sections of the insulator in the manner described in connection with Figs. 1. and 8 of the drawings, as is also the securing element 15. In this instance,however, a binding or anchoring. wire 16has its intermediate portion disposed between the other gripping surfaces .of the sections and passed around thesecuring elementand the end portions of this wire are lashed about the conductor wire at opposite sides of the insulator, or, in other words, around the conductor wire at pointswhere it leaves the insulator. 7

Having thus described "the invention, What is claimed as'new is:

'1. An insulator comprising counterpart sections, each section being provided at its matching end with wire gripping surfaces located atoppcsite sides of the center of the said end,each section being formed with longitudinally extending openings for the reception of securing means for holding the sections assembled upon a support, the inner ends of the said openings terminating "at the gripping-surfaces.

2. An insulator comprising counterpart sections, each being provided at its inner end with relatively laterally and longitudinally offset gripping surfaces, the inner surface-of the offset being obliquely disposed and each section being formed with openings -;for the reception of securing means, the said openings being relatively displaced laterally with respect to the said oblique surface of the offset.

3. An insulator comprising counterpart sections, each including a;body portion-provided with a portion offset later-ally and longitudinally with respect to theinner end of the body portion, the in'wardlyzpresented surface of the offset portion being-obliquely disposed and the said body portion and the said offset portion being formed with openings for the reception of asecuring element, the inner end of the body portion and the inner end ofthe offset portion beingprovided with gripping surfaces.

4. An insulator comprising counterpart sections, each section being-provided at its matching end with relatively'offset gripping surfaces, one of said surfaces constituting the bottom wall of a laterally arcuate-groove and the other gripping surface constituting the'longitudinal convex surface of a transversely extending groove,

5. An insulator comprising counterpart sections, each including relatively offset wire gripping surfaces, one of such surfaces In testimony whereof vve aflix our signabeing formed with a roove curved laterally tures in presence of two witnesses. in an outward direction, and the other sur- VILLIAM J. CURRY [L SJ face being formed with a groove chordal to V 5 the circumferential surface of the section, WILLIAM ANDREWS the bottom wall of the last-mentioned groove Witnesses: being convex in a direction longitudinally E. A. BOUGH, of the groove. V v 1 M. BATEY.

Copies 0! thin patent may be obtained tor iive cents each, by addressing the Commissioner ot Patents,

. Washington, D. 0.

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