US466744A

US466744A - Thomas y

Info

Publication number: US466744A
Authority: US
Publication date: 1892-01-05
Anticipated expiration: 1909-01-05

Description

(No Model.)

T. V. ALLIS. BARBED FENCING.

No. 466,744. Patented Jan. 5, 1892.

Fig-1- UNITED STATES PATENT OFFICE.

THOMAS V. ALLIS, OF NE\V YORK, N. Y.

BARBED FENCING.

SPECIFICATION forming part of Letters Patent No. 466,744, dated January 5, 1892. Application filed March 2'7, 1889. Renewed April 24, 1891. Serial No. 390,241. (No model.)

To all whom it may concern:

Be itknown that I, THOMAS V. ALLIs, a citizen of the United States, residing at New York city, in the county and State of New York, have invented certain new and useful Improvements in Barbed Fencing; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improvement of the kind of barbed fencing in which barbs are produced in the edges of a plain flat strip by notching the edges and slitting the metal lengthwise a short distance from the notches and bending the spurs thus partly separated from the main portion of the striplaterally to the sides; and it consists of the hereinafter described improvements in such fencing, reference being made to the accompanying drawings, in which- Figure 1 is a side elevation of a short section of my improved fencing, a part of which is left incomplete to show the condition prior to the bending of the barbs. Fig. 2 is an edge view of the same with all the barbs bent, and also being corrugated sidewise, as in the complete condition. Fig. 3 is a transverse section. Fig. 4 is an edge view showing the barbs bent in different order.

My improved-fencing consists of the plain flat strip a, of the usual thickness for such fencing, but preferably a little wider than in some other forms, with laterally-projecting barbs b on each edge alternately or in alternate and oppositely-directed couples, the said barbs being produced out of the marginal portions of the respective edges, notched to the depth for the required width of the barbs by the obtuse V-shaped notches c, and slitted along the lines (1 from the bottoms of the notches each way the required length of the barbs or a little more, and the parts thus partly separated from the strips bent laterally thereto, as shown.

The length of the marginal spaces e from which the barbs are produced is the same as the combined length of the two 'barbs produced therefrom, and the distance from space to space of both edges is about the same or slightly less, so that all the barbs are about equal distances apart. This is the most desirable order therefor, both for style of appearance to the eye and for general utility, and it utilizes all the edge portions of the strip available for barbs consistent with the proper reservation of material for strength, for it is found necessary to reserve the whole width of the strip, as in the parts f, fora cer t-ain distance between the spaces e, to counteract the tendency of the metal to crack at the ends of the slits d, and preserve equal strength thereat to the strength of the parts 9 along the slits, although the latter parts aremuch narrower'than the parts f, but more length of the said parts f than is thus required is a waste of a portion of the strip available for barbs.

The wider parts f counteract the tendency to cracking from the ends of slits d by virtue of the transverse rigidity which opposes the obliquely-resultant tearing stresses of the tension of the strips in use.

The angular notches c produoe'the angular points of the barbs in the plane of the bottom of the spaces e, in which planes they are more effective than if in the planes of the edges of the strip, because in the latter condition the strip twists more under the influence of pressure on the points than in the former condition, and thus have less resisting power.

I also corrugate the strip sidewise, as seen in Fig. 2, for elasticity and for better appearance, and I so gage the corrugation to the barbs that the bends thereof for the lateral projection merge in the curves of the corrugations, so as to make them less abrupt and therefore more symmetrical and stronger than they otherwise would be.

What I claim, and desire to secure by Let ters Patent, is-

l. The improved barbed fencing consisting of the plain flat strip having laterally-projecting barbs on each edge produced out of the marginal portions of the strip and being uniform distances apart, and having their points in the planes of the bottom of the spaces in the edges of the strip, substantially as described.

2. The improved barbed fencing consisting of the plain flat strip having laterally-projecting barbs on each edge in alternate and oppositely-directed couples produced out of the marginal portions of the strip and having oblique points produced in the plane of the bottom of the spaces in the edges of the strip out of which they are produced, substantially as described.

3. The improved barbed fencing consisting of the plain fiat strip having laterally-projecting barbs on each edge in alternate and 3 oppositely-directed couples produced out of marginal portions of the strip and being uniform distances apart, and said strip being corrugated sidewise, substantially as described.

4C. The improved barbed fencing consisting In testimony whereof I atfiX my signature in 20 presence of two witnesses. r

THOMAS V. ALLIS. Witnesses:

W. J. MORGAN, W. B. EARLL.