USRE15741E

USRE15741E - scott

Info

Publication number: USRE15741E
Authority: US
Publication date: 1924-01-08

Description

Jan. 8 1924. Re. 15,711

1 R. W. SCOTT 1 I KNITTING 111101111111 NEEDLE Original Filed ma '1, 1920. 2 sheets-sheet 1.

fl KB RaberZyIf-Snqt;

Jan. 3 1924. v -Re. 15,741

R. W. SCOTT KNITTING MACHINE NEEDLE 2 Sheets-Sheet 2 Original Filed May 1, 1920 W T/0'0 RobefiWHo 032 I Reissued J an; 8, 1924.

UNITED STATES PATENT OFFICE.

ROBERT SCOTT, (2F BABYLON, NEW YORK. KNITTING-MACHINE NEEDLE.

Original Io. 1,385,929, dated July 26, 1921, Serial No. 378,233, filed May 1, 1920. Application for reissue filed April 30, 1923. Serial No. 635,716.

DIVISION B.

To all whom it may concern:

Be it known that I, Bonner W. Scorn, a citizen of the United States of America, residing in Babylon, in the county of Suffolk, in the State of New York, have invented certain new and useful Knitting hflachine Needles, of which the following is a specification.

My invention consists of an improved conin struction of knitting machine needles and means for operating these needles, when employed for circular knitting of hosiery.

My needles are each in two parts, relatively movable, preferably in sliding relation to each other, one part being an .instru ment to draw the new loop, while the other is in the nature of a sliding latch which'aids in casting olf the old loop over the new loop. These two elements, which for con venience, may be termed the drawing and casting elements, are of the same width, to fit and be guided in the needle grooves of the cylinder or dial and preferably to slide upon each other.

In the accompanying drawings- Figure 1 is a skeleton side view drawn to an enlarged scale of the operative ends of the two needle elements:

Fig. 2 is a section on the line 2-2, Fig. :0 1;

Fig. 5 1s a-section on the line 3-3, Fig. 1; Fig. 4' is a similar section of a modification;

Fig. 5 IS a race view of the hook of the :5 drawing needle element;

Figs. 6, 7, 8 and 9 are views snowing ditferent positions successively taken by the two needle elements in knitting;

Fig. 10 is a diagram of needle cams which may be employed to actuate these needle elements;

Fig. 11 is a view showing the positions assumed by the needle elements when 'elevated to the non-knitting position as in reciprocating work when knitting hc-eis or toes of stockings.

The element A, which I have spoken of as the drawing needle, has the main portion of its shank 20 with a butt 221, (Fig. 6), of

so any usual and convenient construction to be acted on by the needle cams, the. shank being guided in a needle groove in the needle cylinder C or dial, the case may be. At its operative end, this needle has shock a of a shape suitable to take the yarn fed thereto from the yarn guides anddraw it into a loop.

With this drawing needle A I combine a loop-carrying and casting needle element .13, the shank 23 of which is preferably of the same thickness as the shank of the needle element A and adapted to be guided in the same needle groove. This element B may have any suitable form of butt 24 to be acts! on by cams independently of the cams which operate the element A. This element B, in the form shown in the drawings, has at its active end a hook b with a return bend, the open side of the hook facing to ward the hook a the needle element A.

The shanks of the drawing needle A and the element B slide upon each. other, and the usual coiled spring 8, Fig. 1, bears against the outsideof the shank of the element B to maintain the two elements of the needle together and in the needle grooves of the carrier.

For a portion of the length of the shanks, toward their hooked ends, the two elements may have guiding grooved connection with each other. Preferably the shank of the needle'element A has a V-shaped groove as seen at Fig. 3 to receive the adjacent V-shaped edge of the shank of the slide B. Or if preferred, some other form of grooved .guiding connection, for instance such as shown in Fig. 4, may be employed.

The grooved portion -of the shank of the needle element A may be formed b ofisetting the shank as seen at 25 in i 1 Toward their butt ends the adjacent accs of the two needle elements may have hearing faces, but just back of the oli'set 25 I prefer to form the shank of the needle A with an offset 26 in the direction the opposite of the offset 25, for a purpose which, I will hereinafter explain.

The open sides of the hooked ends of the needle elements A and B face toward each other, as shown in the drawings, and I profor to form the hook it of the part A of the flattened cross-section, such as indicated in Fig. 2, while the hook I; of the element B may have its neck of a triangular cross-section and its outer end pointed, as also shown in the same Fig. 2. The flattened. outer end of the hook a may be brought to a point as seen in Fig. 5.

In Figs. '6 to 9, l have shown successive positions taken by drawing element A. and the elen'lent B under the action of the needle cums shown in. Fig. 10. In this Fig. 10, I have drawn dotted lines at 6, 'Z, 8 and 9, corresponding to the positions reached by the needles as shown in Figs. 6, "T, c? and 9, respectively, it being assumed that the circle ,of needles is trztveii'cg relatively to the cams in the direction of the arrows, Fig. 10. In the several. Figs. 6 to S), the level of the bottom of the throets of web hoiders is indicated by the dotted line In F ig= 6, the drawing element A has be gun to retract under the action of the center cam 30 after taking the new yarn 3/ fed to the yarn guides and the hook b oi the element B is ready to take he old loop a], which is on the shank oi the element A, At 7, Fig. 10, this part B has been retracted by the upper center cam 4:0, so that the hook b of this element B has drznvu For rel: the old loop gt, Fig. 7 At 8, the part A. has been retracted by the czun 31, while the part B is about to be projected under the action of the cam 41,

so that as the hook on is about to drew thenew loop 3/ tlIIOUQl'l the old loop rs, S, the book b has brgun to move the oi'd loop in the opposite dii'eetioi'i, to carry the old loop a: over the book a: oi the element A without frictional contact with At 9, the element A has been fully retracb ed by the cunifi'l and has pulled the new loop 5 through the old loop 0:, While the part B continuing to be projected under the action of the sum t has curried the loop a: clear of the needle element A and to the verge of the cylinder (or dial) and by the time the needle element B has reached its highest or outermost position, the hook I) i has dropped the loop {I} on the legs of the loop 3 leaving the loop and the fabric free to be fed away from theknitting point by the action or the Web holders or the tension of a web take-up. The parts B with their hooks o, moreover, in respect to stresses on the old yard loop in the direction of the needle hook f], virtually constitute a, wetolioldcix The instrument .8 (or B) is in the neture of a. slidinq latch, While the instrument A (or A) migdit be considered the needle. I am aware that needles with slidii'ig latches are old, Tend my present invention. is not reed to the 1 nieticulz r construction of sliding latch neoc lo shown, as that forms the subject of Division A of this application for reissue. 7

When the described construction is used on stocking knitting machine, about one half of the needles have to be projected out of action by a suitable switch cam and picking devices, when knitti mg the heels and toes, and some the needle elements A willbe raised to positions shown in Fig. 11

the part A.

name to this specification.

bringing the olfset 26 in the shanks tile needles to a point to permit constant recipro' cation of the hook of the member B said offset 26 without interference with the thread wrapped about the shanks of the elevoted and inactive needles; l

A switch coin and picking devices suitable for this purpose are such. as have CO111- monly been used in circular hosiery hitting machines, as shown for example in Fetent 1,152,850. The switch. cam in question 'Wil act upon the butts of the instruments A to carry them, at the proper time out of the path of the usual knitting came 30 end 31, Fig. 10, to' pass between these cams E50 and 31 and the

cams

40 and 41, which inde pendently control. the relatively movable in struments B.

The advantage of thus heening instruments B in reciprocationis i @1811 the instruments A are after"? ."s it 4 active position, these instruments then interfere with the o loop by the instruments I claim as my invention 2- 1. A knitting machine needle in two parts in sliding relation to each other, one of seid parts having an ofi'set 26 for the purpose oil accommodating the old loop when said needle partis projected out of knitting position. l

2. A stocking knitting machine, provided with needles each in two relatively movable parts, one of said parts being to'drew a loop and the other for casting, in combination with separate means to'reciprocete the two parts independently of each other, the machine being constructed to permit, the loo drawing part to be moved to inactive posi tion to hold a loop, while the casting pert remains in reciprocation. I

3. A stocking'knitting machine, provide with needles each in two parts in sliding relation to each other, one of said parts beto inactive position to hold it loop while the casting part remains in reciprocation.

4. A stocking knitting machine, provided with needles, each in two relatively movable partgone of said parts being to draw a loop and the other for casting, in combination 1 l with separate means to reciprocu'lie the two parts independently of each other, the loop drawing part having an ofiset to eccon'iinodate the old loop, when said loop-drawing part is moved to inactive position, Will the casting part remains in reciprocation;

In testimony whereof I have signed my somer 1;; scorer.