US805439A - Lightning-arrester. - Google Patents

Description

No. 805,439. PATENTED NOV. 28, 1905.

A. J. BERRY. LIGHTNING ARRESTBR.

APPLICATION FILED PEB.25,1905.

W ATM a 7 tudinal section of a modification.

PATENT OFFICE.

ARTHUR J. BERRY, OF MARION, OHIO.

LlGHTNING-ARRESTER.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed February 25, 1905. Serial No. 247,324.

To all 7.077107% it Uta/y concern:

Beit known that I, ARTHUR J. BERRY, a citizen of the United States, residing at Marion, in the county of Marion and State of Ohio,

have invented certain new and useful Improvements in Lightning-Arresters, of which the following is a specification.

This invention provides a novel form of arrester for relieving telegraph and telephone lines of abnormal charges of electric fluid due to lightning or static charges, the same being of such construction as to provide a small air-gap, a large area of arcingsurfaces, and a number of arcing-spaces, said arcing surfaces and spaces being preferably parallel.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings.

While the invention may be adapted to different forms and conditions by changes in the structure and minor details without departin from the spirit or essential features thereo still some of the preferred embodi ments are shown in the accompanying drawings, in which Figure 1 is a central longitudinal section of a lightning-arrester embodying the invention. Fig. 2 is a transverse section on the line a: :1: of Fig. 1. Fig. 3 is a central longi- Fig. 4 is a cross-section on the line y y of Fig. 3.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The arrester comprises a series of concentric tubes electrically insulated from one another, the tubes of one series being electrically connected with the line to be protected and the remaining tube or tubes grounded, the tubes being arranged so as to have a comparatively small air space or gap between them for tne passage of the spark when the line is abnormally charged. The drawings illustrate two tubes, although this number may be increased within the purview of the invention, so long as the tubes of one set are electrically insulated from the tubes of the other set.

The tubes 1 and 2 have a concentric arrangement to provide an air-space 3 of uniform diameter throughout its length. The tubes. are electrically insulated by plugs 4,

fitted to the ends thereof, each being of a stepped structure, whereby shoulders 5 and 6 are provided to receive the ends of the tubes 2 and 1. The outer ends of the plugs are flanged, as shown at 7, to provide heads to limit the relative movement of the plugs and tube 1 and to space the line-wire 8 from the outer tube 1 a sufficient distance. A jumper-wire 9 connects the arrester with the line-wire 8. As shown in Fig. 1, the jumperwire 9 is deflected intermediate of its ends and electrically connected to the inner tube 2, and its end portions are twisted about the line-wire 8, thereby establishing electrical connection between the line-Wire and a set of tubes. In the construction shown in Fig. 3 the line-wire S is in direct contact with the tube 1, and the jumper-wire 9 serves simply as a binder or connecting means between the arrester and the line-wire. In either case the jumper-wire passes through openings 10 in the plugs 4 of insulating material, and the projecting ends are bent so as to engage with the outer ends of the plugs to hold the latter in place, thereby preventing separation or dismemberment of the arrester when not in service after the parts have been properly assembled.

As shown in Fig. 1, the outer tube 1 is grounded by the connection 11, and, as indi cated in Fig. 3, the inner tube 2 is grounded by the wire or connection 11, which passes through openings 12 of the plugs 4 and formed into a loop. In the latter construction the plugs at are doubly secured by the jumper-wire 9 and the grounding-wire 11.

Notches 13 are formed in the edges of the heads or outer flanges 7 of the plugs to provide seats for the wires 8 and 11, thereby preventing possible movement or displace ment of the arrester after being placed in position upon the line-wire to be protected.

The employment of the tubes results in the provision of a large area of arcing-surface, and by having the tubes spaced apart a short distance a comparatively small air-gap is had for the passage of abnormal charges of the electric liuid should the line-wire become abnormally charged either by lightning or from other cause which would result disastrously to the instruments connected with the line. As a result of the construction disclosed the arrester may be applied to a linewire without necessitating cutting thereof, and after the arrester has been placed in position it does not require further attention,

IIO

since the parts are closed by the plugs 4c and there is no occasion for cleanin the elements, the tubes constituting the arcing-surfaces. The concentric arrangement of the tubes results in having the arcing-surfaces uniformly spaced and disposed in parallel relation, both. of which features are necessary to the efficiency of the device.

Having thus described the inventiornwhat is claimed as new is- 1. A lightning-arrester comprising concentric tubes, and plugs of insulating material closing the ends of said tubes'and supporting them in fixed relation, and having outer flanges notched in their edges to provide seats to properly position the cooperating wires.

2. A lightning-arrester comprising concentric tubes, plugs of insulating material closing the ends of the tubes and supporting the latter in fixed relation, and a Wire having its end portions passed through openings of the plugs and bent against the outer ends thereof to retain the plugs in position.

3. A lightning-arrester comprising concentric tubes, plugs of insulating material closing the ends thereof and holding the tubes in fixed position, and a jumper-wire passed. through openings of the plugs and having its end portions bent to engage with the outer ends of said plugs to hold them in place and serving as means for securing the arrester to the line-wire.

4.. A lightning-arrester comprising concentric tubes, plugs of insulating material closing the outer ends of the tubes and supporting the same in determinate position, a jumperwire for securing the tubes and plugs together and serving to connect the arrest-er to the line-wire, and a ground connection electrically connected with one of said tubes.

In testimony whereof I aHlX my signature in presence of two witnesses.

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