US2474904A - Double stranded blasting mat - Google Patents

Description

July 5, 1949. J. s. MAZZELLA 2,474,904

DOUBLE-STRANDED BLASTING MAT Filed June 24, 1948 2 Sheets-Sheet 1 A fwavz'og, MAZZELLA.

July 5, 1949. J. s. MAZZELLA 2,474,904

' V DOUBLE-STRANDED BLASTING MAT Filed June 24, 1948 I 2 sheds-sheet. 2.

FIEIE y-517101? Patented July 5, i949 UNITED STATES PATENT OFFICE DOUBLE STRANDED BLASTING MAT Joseph S. Mazzella, New York, N. Y. Application June 24, 1948, Serial No. 35,000

4 Claims.

' 1 This invention relates to blasting mats, and aims to provide a novel, practical, useful and sturdy mat suitable for use in all manner of blasting work, which is at the same time capable of standing repeated use.

Another object of the invention is the provision of a blasting mat out of a single length of wire rope or cable, which is threaded into a pattern to form a strong, durable and tough mat.

The above broad as well as additional and more specific objects will become apparent in the following description, wherein characters of reference refer to like-numbered parts in the accompanying drawings. It is to be noted that the drawings are intended solely for the purpose of illustration, and that it is neither desired nor intended to limit the invention necessarily to the exact details of construction shown except insofar as they may be deemed essential to the invention.

Referring briefly to the drawings, Fig. 1 is a fragmentary plan view of an example of a blasting mat constructed as disclosed below, embodying the instant invention.

Fig. 2 is a fragmentary enlargement of Fig. 1.

Fig. 3 is a diagrammatic view, in perspective, of a partially completed mat embodying the invention, illustrating the manner of weaving the wire rope to form the finished mat.

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 3, and includes additional parts which are made use of in the weaving of the mat.

Fig. 5 is a view similar to Fig. 4, showing, however, the next step in the operation of weaving the mat.

Fig. 6 is a sectional view taken on the line 66 of Fig. 3.

Fig. '7 is a sectional View taken on the line '|'I of Fig. 3.

Referring in detail to the drawing, the numeral I indicates a completed blasting mat made in accordance with the principles of this invention, out of a single length of wire rope. Although the wire rope is shown in the various views as though it were a single wire, in practice the said rope is a stranded wire or cable.

In the construction of the mat l0, the method illustrated in Figs. 3-6, inclusive, is followed. In the instance illustrated, a row of equally spaced pins or pegs H, twenty-nine in number, is driven into the floor l2, after passing through a slat l3. A similar slat I4 is provided, parallel with the slat l3, through which thirty similar pegs I are driven, in staggered relation with respect to the pegs II.

The wire rope, indicated diagrammatically at I! in Fig. 3, is first passed around the end peg 15a in the manner shown, then across to and around the end peg Ila and back again around the peg ilic. in the reverse direction, the two woofs thus provided being shown at Ilia. The wire is then again looped around the next peg Nb and brought back again and passed around the next peg 15b. The latter operation is repeated all the way down the line to the pegs H and I5 at the opposite end, so that at the latter end there are also two strands l6d of the wire rope, forming the end woof at that end.

With the completion of the woof I611, the wire 15 is threaded through the pairs of woofs l6a, 1%, etc. in an upward direction (Fig. 3), the first warp thereof being positioned close against the pegs I5, as shown. Upon emerging from the uppermost Woof the, the wire I! is doubled back and again threaded through the pairs of woofs l6a, IBb, etc., but it is to be noted that the first warp ltc passes over every other or alternate pair of woofs it while the second or next warp I6e passes under the same pairs of woofs Hi. This operation is repeated throughout the width of the mat.

However, before the warps are woven as abovementioned, and after the woofs are laid down in the manner shown in Fig. 3, each single doublestranded woof l0, as shown in Fig. 4, is lifted from its peg H and the circular loop l8, formed by passing the rope completely around the peg H, is fixed by tying the same, as with a wire I9a, after twisting the pair of threads H5 at substantially right angles, as shown.

In Fig. 1 the wire I! is shown terminated intermediate the length of a warp near the lower edge of the mat, and is continued intermediate 2. warp near the upper end of the mat. This omission is made for the sake of simplicity and to avoid the needless repetition of the warps throughout the body of the mat.

At the upper edge of the mat, Fig. 1, the edge or end warp 16; is composed of two strands I6g, and this double stranded thread if passes through all of the end loops 18 of the woofs l6, but in the manner illustrated in Fig. 1, that is, first one strand |6g passes over the adjacent sides of one pair of loops l8, then under the adjacent sides of the next pair of loops 3, and so on, and in the reverse direction the second strand lfig is so woven through the loops l8 that it passes under the sides of those loops which the first strand 16g passes over, and vice versa. Finally, the free extremity Ila of the wire I1 is lockthreaded in any suitable manner to prevent its unraveling, as, for instance, by passing it through a number of the successive bights l9 formed by the warps along one edge of the mat.

The cross-sectional views of Figs. 6 and 7 show the weave of the body of the finished mat. In Fig. 6, since one strand only of the doublestranded woof I6 is visible, only that one is shown, threaded between the warps I60 l6e, l6h, lti, etc. Fig. 7 shows the alternate double-stranded threads 46 passing through successive wave loops of the "two adjacent warps [6h and ii.

The woofs [6 of this mat, together with the sturdy construction of the weave throughout, provide a very strong shock-absorbing and durable blasting mat.

I claim:

1. A woven blasting mat substantially rectangular in outline comprising a single length of flexible wire having two-stranded woofs, the ends of each of said two strands being joined by a substantially circular closed loop at one edge of the 'mat, the opposite end of each of said strands being-joined by a bight with the adjacent strand of .the next successive woof, the warps of the body of the mat passing alternately over every other of said woofs and under the inbetween woofs, the two outermost warps at said one-edge of the mat being threaded through said closed loops.

"2. The mat set -forth in claim 1, each of said body warps passing under those of said woofs adjacent sides of one adjacent pair of said loops and .under the adjacent sides of the next pair of said loops, the other of said outermost two warps ipassing alternately under said adjacent sides of said one adjacent pair of said loops and over said "adjacent sides of said next pair of said loops.

JGSEPI-I S. MAZZELLA.

REFERENCES CITED The following lreferenlces are .of record in -the idle =o'f :this patent:

UNITED STATES PATENTS Number Name Date =1;324,627 "Stewart iDec.9, 19-19 2,004,364 Best c..- June all, 1935 2361,1613 Arthur n. Oct. :24, 1944

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