US1139748A - Insulator. - Google Patents

Description

T. W. BEATTY.

INSULATOR.

APPLlCATlON FILED JAN-31.1912.

Patented May 18, 1915.

THOMAS W. BEAT'I'Y, OF NEW CUMBERLAND, WEST VIRGINIA.

INSULATOR.

Application filed January 31, 1912.

To'aZZ whom it may concern Be it known that I, THOMAS W. BEATTY, citizen of the United States, residing at New Cumberland, in the county of Hancock and State of West Virginia, have invented certain new and useful Improvements in Insulators, of which the following isa specification.

This invention relates to insulators for electric conductor wires and more particularly to that class including two sections arranged, when assembled, to clamp thewire or wires, to be held, between them. 1 Such insulators are usually constructed 0 porcelain and the wires tobe held are firmly clamped between the walls of registering grooves in the sections, the screw or nail for securing the insulator in place being driven more or less deeply into the support upon which the insulator is held, whereby to more or less firmly clamp the wires. Unless care is exercised, the screw or nail is liable to be too tightly driven, resulting in fracture of one or both of the insulator sections.

It is therefore'one aim of the present invention to provide an insulator of this type, the sections of which will be so constructed that the screw or nail for securing the sections in assembled relation and for securing them to a support, may be driven firmly into place without any likelihood of the sections being fractured.

- Another disadvantage possessed by such insulators resides in. the fact that the walls of the groove which receive the wire or wires to be supported, are usually serrated or transversely corrugated so that when the wires are very firmly clamped between these walls the insulation thereon is liable to be torn or otherwise injured, and in fact may be completely scraped from the wire or wires-if they are subjected to strain, tending to pull them through the .insulator.

It is therefore a further aim of the invention to provide an insulator the sections of which will have their wire-receiving grooves so arranged that the wire or wires will be firmly held against slipping through the insulator, although not so engaged as to injure the insulation with which they are covered. A further feature of the invention resides in the provision, upon the basal ends of the Specification of Letters Patent.

PatentedMay 18, 1915.

Serial No. 674,624.

sections of the insulator, of entering spurs or projections designed to become embedded in the material of the support upon which the insulator is mounted, when the securing screw or nail is driven into place, turning of the insulator-upon this screw or nail being in this manner prevented.

For a full understanding of the invention reference is to be had to the following description and accompanying drawing, in

which:

Figure 1 is a perspective view of the insulator embodying the present invention. Fig. 2 is a vertical longitudinal sectional View therethrough. Fig.3 is a similarview but taken in a plane at right angles to the plane of Fig. 2. Fig. 4L is a group perspective view illustrating the sections of the insulator about to be assembled. v

The insulator embodying the present invention consists of two counter-part sections which are to be assembled and are to clamp between them the wire or wires to be held. Each of these sections is indicated by the numeral 1 and has a basal end 2, occupying a plane at right angles to the plane of either lateral face of the section. The sections are preferably of porcelain and each is provided with an integral intermediate abutment, one face of which is indicated by the numeral 3, and the other by the numeral 4, the faces occupying planes at right angles to each other and the face 4 lying in a plane parallel to the plane of the basal side 2 of the section. For the passage of the securing nail or screw which is to hold the insulator in place, each section is formed with an opening 5 which opens at one end in a countersink 6 in the basal face or side 2 of the section and at its otherend through the face 4: of the intermediate abutment.

Each section 2 includes a conductor clamping portion which projects beyond the face 4 of the intermediate abutment and includes an inwardly presented face 7 lying in a plane at right angles to the face 4, or in other words in a plane parallel to the plane of the face 3, the outer side face of this portion forming a continuation of the adjacent lateral face of the section. The outer end face of the portion 7 is of undulatory form and is formed with a groove 8 having a similar line of extent. The groove 8 opens at opposite lateral faces of the section 1 and the said faces at the ends of the groove, are preferably beveled as at 9 for a purpose to be presently explained. The section 1 is provided with another conductor clamping portion which is indicated by the numeral 10 and which has an undulatory face 11 located between the plane of the basal side 2 and the face 1 of the intermediate abutment. The face 7 of the conductor clamping portion first described, is of less width at any point than the face 3 of the intermediate abutment at a corresponding point, so that when the sections are assembled with their abutment faces 1 in snug engagement, the undulatory face of the said conductor gripping portion will be slightly spaced from the corresponding face 11 of the conductor gripping portion 10 of the other section. In other words, the parts of each section are so proportioned that when the sections are assembled their abutment faces 3 and 4: will fit snugly against each other but the grooved faces of the conductor clamping portions will not be in contact.

From the foregoing description of the invention and from inspection of the drawing, it will be readily understood that the insulator conductor wires can be supported and engaged between the grooved conductor gripping faces of the sections at the time the sections are assembled and that the face 11 of the said portion of one section will oppose the face 8 of the portion 7 of the other section, the conductor wire being slightly flexed as at 12 at the point of engagement of the walls of the grooves there with as illustrated in Fig. 3. A securing screw or nail 13 is driven through the sections after they are assembled and into the support upon which the insulator is to be mounted, and by referring to Fig. 2 of the drawing it will be observed that although the securing nail or screw is so firmly driven as to bring the abutment faces a of the sections into firm contact, the cooperating faces of the conductor gripping portions of the sections are slightly spaced as at 1a. In this manner, the sections are prevented from being fractured when the securing nail or screw is driven through them. It will further be understood that the conductor wire 12 is firmly held in place and against slip ping through the sections by reason of the fact that the grooves in which the wire is received are undulatory and furthermore, it will be understood that by beveling the lateral faces of the sections at the ends of the grooves, as at 9, chipping of said face at these points is prevented, and furthermore no sharp corners are presented to the insulation of the conductor wire.

It will be observed from an inspection of the drawing that the basal side of each of the sections 1 is provided at or near each corner with a conical spur or projection 15 and from Fig. 2 of the drawing it will be observed that these spurs are designed to enter the material of the support upon which the insulator is mounted and that they serve to hold the insulator from rotation upon the securing screw or nail 13.

By referring to Fig. 2 of the drawing, it will be observed that the openings 5 are gradually increased in diameter from a point substantially midway between their ends to their ends which open at the faces a of the sections, as indicated at 16, so that these faces will not be liable to be chipped at these ends of the openings.

Having thus described the invention what is claimed as new is 1. An insulator comprising assembled gections having abutment portions and hav- 1 ing registering openings extending through their abutment portions for the passage of a securing element, the openings being increased in diameter in the direction of their inner ends.

2. An insulator comprising sections of counterpart form, each section having a stepped abutment portion, having one face located in a plane parallel to the base of the section and its other face located in a plane at right angles thereto, each section having a conductor gripping portion laterally offset with respect to the second mentioned face of the said abutment portion and having another conductor gripping portion offset beyond the first mentioned face of the said abutment portion, and each section being formed with a nail opening extending centrally thereof from the base face of the section to the first mentioned face of the said abutment portion.

8. An insulator comprising sections of counterpart form, each section having a stepped abutment portion having one face located in a plane parallel to the base of the section and its other face located in a plane at right angles thereto, each section having a conductor gripping portion laterally offset with respect to the second mentioned face of the said abutment portion and having another conductor gripping portion offset beyond the first mentioned face of the said abutment portion, and each section being formed with a nail opening extending centrally thereof from the base face of the section to the first mentioned face of the said abutment portion, the said abutment portions extending continuously from side to side of the respective sections and having their said faces smooth and unbroken.

4. An insulator comprising sections to be assembled, each of said sections having an abutment portion having one face located in a plane parallel to the base of the section and its other face located in a plane at right angles thereto, each section havin a con- In testimony whereof, I aflix my signaductor gripping portion laterally 0 set with ture in presence of two Witnesses. respect to the second-mentioned face of the said abutment portion and having another THOMAS BEATTY' conductor gripping portion offset beyond the Witnesses: first-mentioned face of the said abutment J our: BREEN, portion. Mrs. J OHN CONN,Jr.

Copies of this patent may be obtained for five cents each by addressing the Commissioner of Iatents,

Waahington, D. G."

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