US851492A - Combined lightning-arrester, fuse-box, and insulator. - Google Patents

Description

No. 851.492. PATENTEI) APR. 23, 1907.

R. R. BURRIN & T. F. GABBLER. COMBINED LIGHTNING ARRESTBR, FUSE BOX, AND INSULATOR.

APPLICATION FILED 11511.26. 1906.

A TTOHNEYS UNITED STATE PATENT OFFIOE.

nus'sEL- RUBEN BURRlN AND THEODORE FRANCIS GAEBLER, OF

- ROCKVILLE, INDIANA.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed January 26, 1906. Serial No. 297.976.

.BOX, and Insulator, of which the following is a full, clear, and exact description. This invention relates to electric construction, and its object is to provide a convenient device which will constitute a fuse box, a lightning arrester and an insulator.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be h ad to the accompanying drawings forming a part of this specification, in which similar characters'of reference indi cate corresponding parts in all. the figures.

Figure 1 is a perspective, showing the device with a portion of the cover broken away to disclose the interior thereof; Fig. 2 is a plan of the device, representing the cover removed and a portion of the device shown in section ;-Fig. 3 is substantially a longitudinal central section taken on the line 33 of Fig. 2; and Fig. 4 is a cross section taken on the line 4 4 of Fig. 2.

"Referring more particularly to the parts, 1 represents the body of the device, which is preferablyvformed of porcelain or similar insulating material. This body is formed with a chamber 2, and constitutes a fuse box, and at its ends is provided with projecting arms 3- which preferably taper slightly as shown, and are formed on their outer faces with raised knobs or insulators 4, the said insulators being preferably formed with reduced necks 5, facilitating the attachment of line wires 6, as indicated most clearly in Fig. 1. these insulators 4 centrally disposed openings 7 are formed respectively as shown, which are adapted to receive bolts or screws 8 so as to enable the device to be attached to a surface, such as the wall of abuilding. In order to assist in securing the device in position, the inner faces of the arms 3 thereof are prefer ably formed each with a transverse angular bead or tongue, 9, and these tongues are adapted to penetrate the material' of the wall slightly so that they tend to prevent a lateral displacement of the fuse box, and they also Through serve the purpose of resting the device directly, under the pressure of the screws or bolts 8, which prevents breaking of the device when placed on an uneaven surface.

At a suitable point within the fuse box or chamber 2, a pair of the fuses 10, of any suitable form, are mounted upon suitable fuse clips 1 1. electrically connected to binding posts 13, 13 14, It by means of angle clips 15, 15, 16, 16. To the binding posts laconductors 17 are attached which may lead to a telephone or telegraph instrument or similar apparatus. To the binding posts 13 line wires 18 attach From this arrangement, the current would normally pass in through either of the conductors 18, passing through one of the fuses 10 to the instrument and back again through the opposite fuse to the opposite-side of the line. i lVe provide a lightning arr'ester connect'-' ing the clips 15. prises a pair of plates 19'wl1ich are formed with laterally projecting ears 20 which are attached under the feet of the angle clips 15 so as to be electrically connected therewith, as will bereadily understood. These plates 19 are of substantially semi-circular form; their adjacent edges being disposed apart so as to form a slot or opening 21 therebetween, as shown most clearly in Fig. 2. Upon the upper faces of the spark plates 19, an insu; lating plate rests and this plate is preferably formed of mica or similar material, and is provided with perforations 23 for a well known purpose, that of permitting an ab normal discharge of electricity to pass from the plates 19 to the carbon block 25.

Through the opening or slot 21, between the plates 19, a bolt 24 passes upwardly, and has its head recessed at the under side of.the fuse box, as shown in Fig. 3. This bolt affords means for attaching in position a spark block or carbon 25 which is held in position over the mica sheet by meansof a suitable nut 26. Tlie under side of this spark block is preferably provided with the usual cup or recess 27 to receive a fusible composition 28 ing the arrester if the current is of too long duration. The bolt 21L is continuously threaded to its extremity which passes upwardly through an opening 29 in a removable cover 30, the Sllid cover consisting, sim- The feet 12 of these fuse clips are The lightning arrester comfor the well known purpose of shortcircuit- Ply of a substantially rectangular plate having a groove 31 in its under side which receives the upper edge of the wall 32 of the fuse box. A nut 33 is attached to the end of the bolt 24 for the purpose of retaining this cover in position as shown,'and beyond this nut the bolt is provided with a suitable opening at which a seal 34 is attached, as shown in Figs. 3 and 4:.

Between the block 25 and the mica sheet 22, a spark clip 35-is clamped, as indicated most clearly in Fig. 4. This clip is of angu- 1 lar form, as indicated, and is connected with abinding post 36 from which a grounded wire 37 leads. From this arrangement it should be understood that if the ightni'ng should strike in such a way as to produce a current of great potential in the line 18, a spark will pass between the plates 19 and the block 25,

so, that the conductor 37 will carry the current to the ground.

By enclosingthe fuses and the lightning arrester within the porcelain box, there is no danger from fire in case the fuses burn out or a l" htning bolt passes through the device.

fiavi'ng thus described our invention, we claim as new anddesire to secure by Letters Patent: r 1. A device of the class described, consisting of a fuse box having a chamber -i'ormcd therein adapted to receive fuses and having projecting 'arms at the extremities thereof having insulators for attaching elec tric conductors, means for attaching said de vice to a support, and binding posts for connecting wires, and fuses in saidchamber.

2. A device of the class described, consisting of a fuse boxhaving an elongated body wardly through the interior of said box, a

cover for said box having an opening through which said bolt passes, and a nut on'said bolt retaining said cover.

4. A device of the class described, comprising a fuse box having arms extending in opposite directions therefrom with insulator knobs formed thereupon, fuses mounted within said box, a lightning arrest-er mounted within. said box and comprising a bolt passing upwardly through the interior of said box, a cover for said box having an opening through which said bolt passes and havmg a groove in the under side thereof receiving the edge of the wall of said box, a nut on said bolt retaining said cover, and means for attaching said device to a support.

In testimony whereof We have signed our names to this specification in the presence of two subscribing witnesses.

RUSSEL RUBEN BURRIN. THEODORE FRANCIS GAEBLER.

\Vitnesses':

G eoaon (3.. ltliLLnu, Va J. rfin'rn.

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