US656780A - Lighting-arrester. - Google Patents

Description

No. 656,780. I Patented Aug. 28, I900.

v w. E. ATHEARN.

LIGHTNING ABRESTER.

(Application filed Feb. 16, 1898.)

(No Model.)

2 6 5 J" L f 0 Z 11/ K 1 nllll m l IIHI illllm C w --1 I I f z i WITNESS INVENTOI? a? gfwu 4 T OHIVEY 4o when the arrester is placed in position the UNITED STATES PATENT Fries IVILLIAMEDWVARD ATHEARN, OF hlEhV YORK, N. Y.

LIGHTNING-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 656,780, dated August 28, 1900.

Application filed February 16,1898. $erial No. 670,596. (No model) To all whom it may concern.-

.. Be it known that'I, WILLIAM EDWARD ATHEARN, a citizen of the United States, and a resident of New York city, borough of Brooklyn, in the county of KingsandState of New York, have invented certain new and useful Improvements in Lightning Arresters, of which the following is a specification.

This invention relates to the class of lightning arresters that depend upon chokecoils for effect, and has for its object a simple, compact, self-contained instrument possessing the highest efficiency.

The object is attained by the means set forth in the accompanying drawings, in which like characters refer to similar parts throughout the several views.

Figure I represents an elevation of the arrester. Fig. II represents a top view of the arrester. Fig. III represents abottom view of the arrester.

The arrester consists of an elongated porcelain block, the ends a a of which are rectangular in cross-section, having holes .3 s, Fig. 2, at their extreme end, for fastening the arrester in place. A central section 0 of the block is likewise rectangular in cross-section, while the portions 1' r are round and are provided with a spiral groove like a screw-thread, except that the out of the thread is semicircular to conform to the shape of the wire to be wound in it, as shown at 1 1, Fig. III. In the said groove a copper wire t, preferably bare, is wound, starting with the binding-post b and winding in a single piece to the bindingpost I). In Fig. III is shown 110w the wire passes from the section 0" to r, the section 0 being recessed on the under side to admit of the wire crossing overbelow the surface of the block, as also indicated in Fig. I, so that wire will not be in contact with whatever the arrester may be affixed to. It will be observed also, by reference to Fig. I, that the screw that holds the binding post g also lies in a recess still farther Within the block to avoid all contact with the wire. The wire thus wound on the block constitutes a part of the circuit in which the arrester is placed. Each of the parts a a is provided with two binding-posts. The line L is connected with the two outer posts 13 p, and these two posts are connected with the posts I; b by fuses f j.

All the screws securing the binding-posts to the block have their heads indeep recesses in the base of the block, as in Figs. Land II.

Numbers of these arresters are often installed together, being placed vertically in rows side by side and close together. To provide for fuses that in blowing might interfere with neighboring fuses, a recess is provided in one end, or both ends, if needed, beneath the fuse, as in Fig. II, at 0. When the fuse is placed beneath the binding-posts, it may be depressed within the recess, as indicated by a broken line, Fig. I. The recess is of such capacity as not to interfere with a proper circulation of air around the. fuse. Whenjthe fuse is so placed, its blowing can do no harm. vThe ends a a are notched on their inner top ends, as at n 11-, Figs. I and II, to receive a brass plate m, and the section a is reduced at the top to a level with the notches. The brass plate m rests on the section 0 and the notches a close to the wire coils, where it is securely held by a nut 1' under the bindingpost 9. This plate constitutes the ground, and the ground-wire is connected to the binding-post g.

While the arrester shown is described as made ofporcelain, it will be understood that this material has been found to be the best for the purpose; but the block maybe made of any non-conductin g material. I also reserve the right to vary the shapes herein shown, so long as the principles of the invention are adhered to.

What I claim, and desire to secure by Letters Patent of the United States, is-

1. A lightning-arrester comprising a block of non-conductivity having elongated ends bearing connections for the line and fuses, a central portion to which the ground-plate and ground connection are secured, and in termediate sections wound with coils of wire that constitute part of the line-circuit, and a ground-plate secured to the said central portion and extending contiguous to the said coils to each of the said end sections, substantially as herein shown and described.

2. The combination in a lightning-arrester of a now-conducting block having sections a, (t, provided with binding connections for the line and fuses, screw-holes for securing the block to a base, the central section for the support of the ground-plate having, its top surface on the plane of the notches in the end sections, and the intermediate spirallygrooved sections, with the bindingposts, fuses, and coils forming a part of the line, and the ground-plate and connection, sub stantially as herein shown and described.

3. A lightning-arrester comprising a block of non-conductivity having elongated ends with connections for the line and fuses, a recess in the end for the depression therein of

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