US190836A - Improvement in barbed fence-wire - Google Patents

Description

J. DOBBS.

BARB FENCE-WIRE. N0. 190,836. Patented May15,1877.

\f/VITNESSES 0,4,4 lwjigdl ATTOR N EY UNITED STATES PATENT OFFICE.

JOHN DOBBS, or VIGTOR, IOWA.

IMPROVEMENT IN BARBED FENCE-WIRE.

Specification forming part of'Letters Patent No. 190,886. dated May 15, 1877; application filed July 29, 1876.

To all whom it may concern Be it known that I, JOHN DoEBs, of Victor, in the county of Iowa and State of Iowa, have invented a new and valuable Improvement in Wire Fences; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a perspective view of a section of wire provided with the barb. Figs. 2 and 3 are detail views, showing the screw-threaded groove (1 and Fig. 4 is a top view of a wire to which a barb has been applied.

This invention has relation to improvements in barbed-wire fences; and it consists in the construction and novel arrangement of spiral-shaped grooves, made at intervals in the fencewire to receive the coil or twist of the barbs, as hereinafter shown and described.

In the annexed drawings, the letter A designates a section of a wire fence made up of a suitable number of horizontally-arranged spaced wires, B. These wires are provided, at suitable distances apart, with screw-shaped grooves a, into which the barbs are snugly seated by means of a suitable clamping-instrument. These barbs will be U-shaped, and made of a single piece of (preferably) round wire, and they will be twisted once around the wire, and deeply seated in the grooves a by the clamp, the pointed ends of the said barbs being extended beyond the wire on opposite sides of the fence. By this means the barbs, being seated in the screwshaped grooves in the wire, will be rigidly held from rotating on the same, and, also, from sliding along the wire toward each other.

I am aware that a fence-wire provided at intervals with spiral twists, into which the barbs are seated with their ends turned outward at right angles to the fence, has heretofore been employed. I therefore lay no claim to such device.

I am also aware that a U-shaped barbblank, adapted to be forcibly clamped on a wire in such a manner as to indent its sides, is old, and I do not, therefore, claim such invention.

Instead of the U-shaped blank I may use a straight piece of wire, which will be bent around the fence-wires, and seated in the screw-threaded grooves a.

I am aware that it is not new to twist the wire of a fence into helical form, and to intertwist therewith the helical central portion of a barb; also that it is not new to secure a barb which has been twined around a wire by compression; hence I do not claim such inventions.

What I claim as new, and desire to secure by Letters Patent, is-

The fence-wire herein described, having the interspaced surface-grooves a running spirally around the wire, into which grooves the barb-wires are coiled or twined, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

JOHN DOBBS.

Witnesses:

J. G. GRIDLEY, WM. ELLIOTT.

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