US2888854A

US2888854A - Lock knot

Info

Publication number: US2888854A
Application number: US519588A
Authority: US
Inventors: Johnson Roland
Original assignee: Dominion Textile Inc
Current assignee: Dominion Textile Inc
Priority date: 1955-07-01
Filing date: 1955-07-01
Publication date: 1959-06-02
Anticipated expiration: 1976-06-02

Description

June 2, 1959 Filed Ju'ly 1, 1955 LOCK KNOT Roland Johnson, Drummondville, Quebec, Canada, assignor to Dominion Textile Company, Limited, Montreal, Quebec, Canada, a corporation of Canada Application July 1, 1955, Serial No. 519,588 2 Claims. (Cl. 87-12) The present invention relates to the manufacture of nets and more particularly to an improved knot formation.

In the making of netting, a plurality of strands or lengths of cord or twine are interconnected at regularly spaced apart intervals by knot formations so as to form the meshes of the net.

It is important that the knots used for this purpose are of such formation that they will not slip, particularly when the cord or twine from which the netting is made is of a synthetic nature, for example, nylon or the like. it is also important that the lengths away from each knot are held in a symmetrical pattern so that there will be no tendency for the knot to twist or fold.

It is usual to make such knots as left and right hand formations in alternate rows of the net so that a general twist will not be imparted to the twine during the knotting operation.

Accordingly, the present invention is an improved form of a knot particularly adapted for interconnecting adjacent lengths of flexible cord in a netting construction.

More specifically, the present knot formation cornprises a first spiral loop in one of the lengths with portions of the length continuing from the loop in opposite directions, and in the other length an undulating formation having three alternate bights with the shanks of the bights individually and in sequence passing through the rst loop, over a porton of the length forming the loop and one of the length portions extending away frm the loop, back through the loop around the length forming the loop and again passing through the loop, over a portion of the length forming the loop and the other of the lengths extending away from the loop, and finally back through the loop in a direction opposed to the rst loop entry. With this arrangement, the undulating formation of the portion of the second length forming the bight intertwines about the first loop so that when the knot is tightened, all length portions leading from the knot are retained in a substantial symmetrical order and there is no slippage in any direction.

Having thus generally described the nature of the invention, particular reference will be made to the accompanying drawings wherein there is shown by way of illustration diagrammatic Views illustrating the formation of a knot in accordance with the invention, and in which:

Figure 1 is a front View of a portion of a netting construction with the adjacent lengths of cordage interconnected by knots having a formation according to the invention.

Figure 2 is an enlarged detail view showing the knot in untightened condition, illustrating more clearly the knot formation for a left hand knot.

Figure 3 is a view corresponding to Figure 2 showing the knot formation as it would appear for a right hand knot.

Figures 4 and 5 show the knot formations of Figures nited States Patat 2 and 3 in enlarged detail as they would appear when tightened.

With particular reference to Figures 2 and 4 of the drawings, which refer to the left hand knot, by way of example, and with reference to Figure 1 showing a portion of a netting construction using such knots, the netting consists of adjacent lengths of exible cord or twine which are interconnected at regularly spaced apart intervals by knot formations as illustrated.

In the construction shown, starting from the top row, one of the cord lengths is indicated at 10, while the other cord length is indicated at 12 with the first row of knots being left hand knots indicated at 14, the second row being right hand knots indicated at 16, the third row again left hand knots indicated at 14 and so on.

In each of the knot formations, shown in Figure 2 for the left hand, one of the lengths, say 10, is rst formed into a spiral loop 20 having portions of the

length

22, 24 extending away from the loop in opposite directions. The other length 12 follows an undulating formation having three

alternate bights

26, 28, 30, the Shanks or legs of which intertwine the first loop in the following manner. The length 12 passes first down through the loop in one direction and around the portion of the length 10 forming the loop and a portion of the length 22 extending away from the loop to form the bight 26. lt is then passed back through the loop in the length 10 and around the portion 10 forming the loop to form the bight 28; it then passes back through the loop around the portion of the length 10 forming the loopand the length portion 24 extending away from the loop to form the bight 30; finally, it passes back down through the loop formed in the length 10 at the side opposed to its first entry. When this undulating formation is tightened, the

bights

26, 30 come together at the top of the loop with the bight 28 between the

bights

26, 30 and at the bottom of the loop presenting the formation shown in Figure 4. This maintains the

length portions

22, 24 and the

portions

32, 34 of the length 12 in their symmetrical arrangement extending away from the knot. The length portions extending away from the knot in all directions are retained at substantial right angles so that the meshes formed between the adjacent lengths are substantially square in formation.

As will be appreciated, by reference to Figures 3 and 5, this formation is repeated in a right hand knot but in the opposite direction so that each alternate row of knots tends to twist the cord slightly in opposite directions thereby neutralizing any twist imparted to the netting construction during the knotting operations.

I claim:

l. A knot adapted for interconnecting adjacent lengths of exible cord in a netting construction comprising, a first spiral loop in one of said lengths with portions of said length continuing from said loop in opposite directions, and in the other length an undulating formation having three alternate bights with the Shanks of said bights individually and in sequence passing through said rst loop, over a portion of said loop and one of said length portions extending away from said looppback through said loop around the length forming said loop and again passing through said loop, around a portion of said length forming said loop and the other of said lengths extending away from said loop, and finally back through the loop in a direction opposed to said first loop entry whereby said undulating formation when tightened causes f all three bights to bind and return said first loop and all length portions leading from the knot in substantially symmetrical order.

2. Netting constructed of spaced lengths of flexible cord or twine interconnected at regularly spaced apart intervals therealong by knot formations which include one leading from the loop respectively, the portions of said length in a spiral loop formation with portions of the said other length leading from said undulating formation one length extending from thefloop in opposite directions emerging from said loop at opposite sides thereof. and the other length intertwined about said rst. loop in an undulating formation having three alternate, bghts 5 References Cited in the fue of this Patent with the length portion forming said bights surrounding in sequence the said one length forming the loop and UNITED STATES PATENTS one of the length portions leading from the loop, the 2,162,115 Pauls Iune 13, 1939 said one length forming the loop, and the said one length 2,641,951 Sonnberger June 16, 1953 forming the loop and the other of said length portions 10