US403491A - Insulating device for line-wires - Google Patents

Description

(No'ModeL) T. J. SMITH. INSULATING DEVICE FOR LINE WIRES.

INVENTOR, IRA/04,444,. B

61 4 v .7 r i l Patented May 14, 1889.

WITNESSES: %hi ()Mnw MI. ATTORNEY,

UNITED STATES PATENT OFFICE.

THOMAS J. SMITH, OF BROOKLYN, NEIV YORK, ASSIGNOR TO THE E. S. GREELEY & COMPANY, OF CONNECTICUT.

INSULATING DEVICE FOR LINE-WIRES.

SPECIFICATION forming part of Letters Patent No. 403,491, dated May 14, 1889.

Application filed February 19, 1889. Serial No. 300,428. (No modehl To aZZ whom it may concern:

Be it known that I, THOMAS J. SMITH, of Brooklyn, county of Kings, State of New York, and a citizen of the United. States, have invented an Improved Insulator Device for Lineires, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a device for insulating and suspending the line or circuit wires of telegraphs, telephones, &c.; and my invention consists in the parts and their combinations hereinafter described, and as more particularly recited in the claims.

Figure 1 illustrates in perspective elevation an insulator and suspending device 0011- taining my invention. Fig. 2 shows in elevation a modification of one part of my device. Fig. 3 is a plan of my improved sectional insulator detached and the sections being shown united. Fig. 4 is a side elevation of the same. Fig. 5 is a horizontal section of the same, taken on line Fig. 4. Fig. 6 is a plan of the same, showing the sections separated and Fig. 7 is an elevation of one of the sections, looking at the internal face thereof.

A is a sectional insulator-ring composed of the sections or halves a and a united flatwise at their divisional line, as shown. The insulator is composed of porcelain, glass, rubber, or other suitable non-electric conducting material.

B is a band of metal or other suitable durable material which encircles and binds together the united sections of the insulatorring.

C is a stem carried by the band, and of any desired length. It preferably of metal and integral with the band.

D is an eye carried by the stem upon its free end, and preferably integral with the stem, so that the band, stem, and eye are rigidly in successive connection with each other.

The band B may be and is desirablyformed of a wire or wires, either in the form shown in Fig. 1, wherein one of two sections or lengths of wire each encircle onehalf or part of the circumference of the insulator-ring and the wires are united or joined on oppo site sides of the ring by twisting them about each other, or in any known equivalent manner, as shown at I), Fig. 1, or by a wire which passes entirely around the insulator-rim g and has its ends twisted together, as shown in Fig. 2 at b.

The stem C maybe and is desirably formed by the end or ends of the wire or wires which bind the sectional insulator-ring together in the form of the band shown, and where the two wires are employed the ends constituting the stem may be desirably twisted about each other, as shown in Fig. 1.

In Fig. 2 an end of a single wire is shown as constituting the stem C.

The eye D may be formed of the two wires shown in Fig. 1 by curving each wire semicircularly near the free end of the stem, as shown at (Z, and then twisting the remaining extremities, as shown at W, beyond the eye thus formed. When a single wire is used for the stem, as shown in Fig. 2, it may be bent into a loop at its free end and its extremity twisted about the shank: part of the stem, as shown at b By means of the described devices a suspensory insulator for telegraph and similar line-wires is constituted which is economical, effective, durable, and readily and quickly adjustable to the wire by the lineman. In practice the lineman first unites the sections of the insulator A around the line-wire A; then binds the sections together with the band B, constituted of a piece or pieces of the line-wire clipped therefrom and twisted together, as set forth; then causes the end or ends of said wire pieces to form the stem C, and finally fashions the eye D upon the extremity of the stem-wire, as described. The necessity for the transportation by the linemen of any distinctive form of band or strap for the uniting permanently of the sectional insulator is thus wholly obviated.

It is preferable that a thimble, E, should be inserted in the eye D to strengthen the eye and withstand abrasion.

The insulator device, constructed as described,is specially adapted to be suspended by a hook or nail passing through the eye D and seated in a tree-limb or wall or post. This is illustrated in Fig. 1. When linewires are suspended in this general manner, it is desirable that the suspending devices should have some play upon the object to which they are suspended, to permit a swing ing motion of the line-wire'without strain upon it or the suspending devices; and one particular advantage arising from myinvention is that this desired playis wholly secured at and by the eye D, and that the stem 0 rigidly unites the band B and eye D, so that wear upon a joint or uniting-loop between either the stem and band or stem and'eye, or both, as frequently occurs in devices of this character as heretofore constructed, is wholly avoided.

Another feature of my invention consists in providing the contiguous faces of the united sections of the insulator-ring A with means whereby said sections are adapted to be interchangeably locked together, so as to prevent their lateral displacement upon each other when united. I accomplish this by forming a boss, of, which may be hemispherical, or, which is preferable, conical, upon one of the said faces of each section a and a, and, preferably at or about the center of said face, and a corresponding depression or recess, a in similarposition in the other face of the section. This is illustrated plainly in Figs. 5, 6, and 7. By this means the sections when united will, by the seating of the bosses a on each in the depressions a in the faces opposed to said bosses on each, so lock the sections as to prevent their displacement laterally upon each other, and the bosses and depressions being'similarly located on each section of every insulator the sections will be capable of being interchangeably locked together, as described. The advantages of having the sections of the insulator thus locked together both during the mounting of the insulator-ring in a suspensory device and afterward, when the line-wire is thereby suspended, are obvious.

It is not my intention to claim, broadly, herein a sectional insulator-ring, nor to claim, broadly, an insulator-ring the sections of which are united by an encircling band attached to a suspensory stem, as neither of the same, broadly considered, is novel.

WVhat I claim as my invention, and desire to secure by Letters Patent, is

1. An insulator device for line-wires, composed of the sectional insulator-ring A and the stem 0, provided at one end with the band 13, serving to encircle and hold together the sections of said ring, and at the opposite end with the closed or continuous eye D,- serving to suspend the united parts, substantially as and for the purpose set forth.

2. An insulator device for line-wires, composed of a sectional insulator-ring, A, a band, B, consisting of a wire or wires encircling and holding said ring-sections united and twisted together beyond said sections, as set forth, and a stem, 0, consisting of the same wire or wires as the said bandand having integral therewith the eye D at the free end thereof, substantially as and for the purpose specified.

3. A sectional insulator-ring having upon the divisional faces of each section, respectively, a boss, a and a corresponding depression, a said boss and depression'being similarly located on said respective faces of the section, whereby the sections may be used interchangeably in constituting an insulatorring, substantially as and for the purpose set forth:

THOMAS J. SMITH. \Vitness es:

ARDEN S. FITcH, A. T. FALES.

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