US1057166A - Knitting-machine. - Google Patents

Description

G. H. PERKlNS.

KNITTING MACHINE. APPLICATION FILED 00T. 1B, w12.

3,05?, 16@ Panennet im. 25, 19m.

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n. Pennine, or'LAKErozar, Laconia, New Hai/Iranian, assieme. To

Cl? Nil MANUFACTURING- COR'IPANY, OAF LAKEPO'R'E,

saffron or namrsnmn.

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Specification of Letters atent.

Application le'd ctobcr 18, 1912. Serial No'. 726,473,

i To @ZZ whom it may concern.'

Be it known that I, CHARLES H. PERKINS, ot Lalreport, in the city of Laconia, county of Belknap, and State of New Hampshire,

have `invented certain new and useful Im-Y provement-s in Knit-ting-l\iachines, of which the following is a specification.

The present improvements relate to the throwwlown or draw-in cams of knitting machines, the purpose being tol aid in pushing the needles down at a stcep'an'gle when approaching the lowest drawing point, thereby avoiding making holes in the knitted fabric by preventing knots pulling upon the heads of the needles. l

The improvements are illustrated in the accompanying drawings, whereinl Figure l, is an elevation of a draw-in cam made in accordance with the present invention. 2, Sand' 4, are detail- `views ot the scopate devicesy which make up the draw cain,

The drawdn cam to which the present invention relates is the cam which draws .in the nee-dies of the knitting machine, thereby drawing' the newly formed loops through the preceding loops of the fabric. It corresponds, for example, to the cam shown at 4 and 5, in Fig. 17, of United States Letters Patent of John S. Crane, No. 1,027,034, May

21, i912.' ne cam is shown complete in Fig. i. Itcomprises a. cam plate A, which, as shown in .Fig fi, is provided with a recess c, and with holes and c. Fitting` within this recess is a block B, which, as shown in Fig. 3, has a recess al, a stud e, a

projecting pin A #and a hole g.the stud e,

and pin f, extending trom the inner face of the biock. A toothed wheel C, shown separately in Fig. 2, has an eye 7a.,.which fits and turns upon the stud e. The toothed wheell C, is placed upon the block B, with its eye i1., fitting' over the stud e, so that the wheel C, within the recess d, of the block. rThe block is then fitted within the recess a, of the cam plate A, and the projecting pin j", ot the blockl fits within the plain hoie c, of the cam plate; the hole g, of the block registers with the screw threaded hole o, ot the camplate A. The

lblock and cam plateare4 then united to-igether by a screw D, es. shown in Fig. 1. When the parts are thus united, the teeth of the wheel C, extend beyond the steepest portion z', of theA cam track j, against which the nibs of the needles run. l

11a-temeer arene-5,1913.

Assuming that the organization of the-l knitting machine is such thatl the needle" cylinder rotates and the knitting cams'are stationary (as in said 'Crane Pate-nt, No. 1,021,034, although the invention is equally applicable to a knitting machine wherein the needle cylinder is stationary and thev knitting cams rotate)` the needle nibs will approach the cam ijn the direction indicated by the arrow 7c., in Fig. l. 1The needle nibs encounter the cam track j, of the draw-in` cam and are thereby drawn irnrst gradu ally ai; then` Y with greater rapidity. Finally, the needle nihs encounter the projecting teeth of the draw-in wheel C, causing the wheel to rotate. At the same time, due to the engagement of needle nibs,v the needles are moved downwardly at a steeper angle than can ot-her- Wise be obtained and this steeper downward movement occursl near the lowest drawing point. The effect of this action is to get a longer stitch, or toget the ,required ,length of stitch by a more direct pull of the needle when near the lowest drawing point, and the result to avoid making holes inthe fabric or breaking the yarn since the low position of the needle acted upon b v the' draw-in wheel is obtained while the following needles still remain in a position where they are free to pass knots which may be in the yarn. These 'nots are passed freely without pulling open the heads of,` the needles.

I claiin-- 1. A draw-in cam for a knitting machine having a toothed drawfin wheel located within a recess near the lowest drawing point of the cam, the teeth of the wheel projecting beyond the cam track so as to be in the path of the needle nibs.

2. A draw-in cam for a knitting machine having a toothed draw-in wheel near the lowest drawing point of thevcam, the teeth the teeth and the.

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of the 'wheel projecting beyond the cam In Witness whereof, 'i' herve hereunto f track s0 as t0 be in the path of the needle signed my name in the presence of two Sub- 10 nibs.A d f 1 scrbing witnesses.

3. raw-in cam or a mit-tin machine s -D u www i O 5 leaving a toothed draw-in wheelgnear the CHARLLS u ''hhm owest drawing point of the cam, .the teeth Ytnesses:

of the Wheel being in the path of the needle WILLIAM T. Swain, Anibs. CLINTON E. BANFH/n.

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