US510829A - Charles j - Google Patents

Description

` (No Model.) 2 sheets-sheen `C. J. APPLETON.

CIRCULAR KNITTING MACHINE.

No. 510,829. Patented Deo. 12, 1893.4

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v IIIII UNITED STATES j PATENT EEICE.

CHARLES J. APPLEToN,`o'E NEW roRK, N. Y., AssIcNoE on Two-THIRDS To HUGO s. MACK AND ELBERT A. WHITTELSEY, oF SAME PLACE.

CIRCULAR-KNITTING MACHINE..

SPECIFICATION forming part of Letters Patent No. 510,829, dated December 12, 1893. Application filed August 3.1890. ySerial No. 361.425. (No model.)

To a/ZZ whom t may concern:

TON, a citizen of the United States, residing in the city of New York, in the county and State of NewYork, have invented certain new and useful Improvements in Circular-Knitting Machines, of which the following is a specification.

This invention relates to knitting machines of the circular type, and has for its object to produce, in amachine of that class, a turned or overlapped welt or hem, such as has only been heretofore made on [iat or straight machines. To this end I employ devices for putting out of action the horizontal needles and for holding down the loops on the vertical needles in the proper position, said devices including hold-downs for holding the loops down and backof the vertical needles so as to allow them to slide through the loops thereon and be ready to take the yarn for another course.

For full comprehension of my improvements, reference must be had to the accompanying drawings, and to the following detailed description wherein similar letters of reference indicate like parts.

In said drawings, Figure l is a plan of a knitting machine embodying my invention. Fig. 2 is a transverse vertical section. Fig. 3 is a horizontal section taken ythrough the operating cam on line X, X, Fig. 2, only a few of the horizontal needles being shown'. Fig. 1.1. shows a detail of the cam for moving the hold-downs. Fig. 5 shows a detail of the sprocket wheel and chain, and Fig. 6 shows a detail of the ratchet, pawl and tripping mechanism.

a, represents the circular plate carrying the horizontal needles'a, which are arranged radially thereupon in the usual manner.

h, is the stationary cylinder upon the outer face of which the vertical needles b', are situated,-their Shanks or butts projecting into a cam groove d', in the cam cylinder d, which operates said needles.

c, is the cam cap. c is the drawing in cam for operating the horizontal needles a', the cam cap being fixed upon a central shaft g, so as to revolve therewith.

e, is the annular ring surrounding and fixed tothe needle cylinder b,-a series of radial manner.

grooves e2, being formed in said ring to receive the lower arms of my hold-downs e the same being pivoted therein in any suitable The upper arms or ends of these ho1d-downs are so configurated as shown, as to hold the stitches or loops down upon the vertical needles b'.

f, is a suitable yarn guide located contiguous to the needle cylinder. g', is a toothed sector mounted loosely'on a collar of the cam cap c, and intel-meshing with a sector h, in the same plane,which latter is carried upon the upper end of a spindle Jr, journaled in an extension lL",'of the yoke t',

which is fastened to the cam cyliudercl. The

sector h, is slotted at h to permit the passage of the yoke and said yoke is also fixed upon the upper portion of the central shaft g. This shaft passes centrally through the circular plate c, and has a collar on its lower end, the yoke i, revolving therewith and with the cam cylinder,-the plate a being provided with downwardly projecting arms c, o, which abut against lugs o', o', formed on the bed plates z, thus holding the plate and horizontal needles stationary.

Fixed upon the lower end of the spindle k is the disk j which hasa tripping device I7 on its under side arranged to move the disk in either direction by the action of the pin lrand pattern chain m having cam links m2, thereby throwing the horizontal needles in and out of action.

l is the main driving shaft, j ournaled Linderneath the bed plate z, and carrying a pinion l', which meshes with a gear Z2, formed upon the lower side of the carn cylinder @L -these gears being preferably set so that there will be two revolutions of the pinion to one of the cylinder. Mounted loosely on the shaft l, contiguous to said pinion, is asprocket Wheel fm, around which passes a pattern chain m', constructed so as to regulate the number of plain courses in the welt or hem', aud length of the fabric to be knit. At the side of -the sprocket Wheel, and preferably fixed upon the same sleeve, is a ratchet wheel n, with which engages a pawl fn', carried upon the lower end of a spring actuated pin o, projecting through the bed plate z. A disk p, is also fixed upon the driving shaft Z, and has a projecting piu IOS p', so placed upon its face that the rotation of the shaft brings said pin over and above the point of a tripping plate q,pivoted on the pawl arm, so as to depress the pawl and move the ratchet wheel one tooth. Vlien the pin p' has passed the center of the tripping plate q it will then be passing over thelarge end of the plate depressing it, when the spring o will raise the pawl arm and turn up the point of IQ the tripping plate so as to allow the pin p to pass on the next revolution of plate p underneath the point of the plate and return it to its former position by coming in contact with the under side of the large end of the same, i5 thus throwing down the point of the tripping plate and resetting it in its normal position ready to operate the ratchet wheel at the next revolution.

o', is a spindle journaled vertically in the 2o bed plate e, having a spring r', and an enlarged butt or end adapted to be impinged upon by cams or enlargements m2, formed upon some of the links of the pattern chain fm', their number being proportionate to the number of plain courses required in the welt or hem. As the driving shaft, sprocket Wheel and chain revolve, the spindle r is raised each time its lower end encounters one of the cam links m2 into position for its upper end to en- 3o gage with the tripping device j', and thus, through the spindle or shaft 7c, to operate the sectors 7i and g. A pin g2 passes up from the cam piece c, to a curved slot g3, in the sector g', and down to engagement with a swinging cam piece s, pivoted to said cam piece c, on

its under side. This serves to throw the horizontal needles out of operation while the vertical needles proceed with plain work.

t, is a roller journaled in the yoke z', in such 4o a position as to bear upon the lower arms of the hold-downs e', as they pass and thus free their upper ends from the fabric, and at a point within said yoke directly opposite said roller, I fix a cam plate u, for raising the holddowns into contact with the loops after the vertical needles have descended and shut ed the old loops and before they rise again. The hold-downs are so arranged that there are two hold-downs between each vertical needle and 5o its adjoining vertical needle, so as to allow the horizontal needles to pass centrally between the vertical needles and have on each side of each of them a hold down, thus leaving, when the vertical needles are knitting 5 5 plain work and the ribbing needles are thrown out of action, two hold downs between each two vertical needles as above described.

I may further describe the operation of my machine as follows: Work being on the nee- 6o dles, and motion being given to the cam ring (l, by the pinion Z', on shaft Z,and the other working parts being in position for making ordinary rib-work, one of the cams m2, on the chain tm', engages the butt end of the spindie r, and raises it high enough for its upper end to enga-ge the tripping device j', and thus, (through spindle k) by moving sectors 7i and g, by pin g2, working in groove g3, 1 n sector g', and moving cam s, throws the hori zontal needles e', out of operation while still leaving the loops thereon.. The vertical needles still continue knitting loops and courses, in the shape of a bag, tuck or pouch continually gaining in length (out of which the overlapped or turned welt is formed) until by the assistance of thehold-downs a sufficient length is produced for the purpose required. Then another cam on the chain will cause thespin; dle r to engage with the tripping device j which is pivoted on the under side of the disk. The movement of the trippingdevice 1s limited by the pins i2 on the disk j so that when the tripping device j comes in contact with one of the pins it will move or turn the disk j in that direction returning the sectors to their former position and bringingboth sets of needles into operation, again forming ribbed work and completing the turned welt. Motion is given to the chain and its sprocket by the ratchet n, its pawl and tripping device q, and the chain moves only one link during each revolution of the machine,-thus saving length of chain.

It will be readily seen from the foregoing, and from the drawings, that the essential features of my hold-down devices may be applied to circular rib knitting machines of any of the well known classes, the hold-downs being between the vertical needles and arranged in a manner to allow the horizontal needles and the vertical needles to work at the same time, producing ribbed work, and also to work with t-he vertical needles when the ribbing needles are thrown out of operation for producing plain work on the said needles. The hold-downs will then keep control of the loops until enough plain work is knit, the only necessary addition being means substantially such as I have shown for successively throwing said hold-downs into and out of engagement with the needles and the loops carried thereby.

Having thus described my invention, I claiml. In a circular rib knitting machine the combination with the vertical and horizontal needles and means for operating them of holddowns e', depressing roller t, lifting cam plate u, and ring e, said devices for holding down the loops arranged in such manner that two of such hold-down devices will lie within each pair of vertical needles and one horizontal needle within each pair of hold down devices, substantially as Vand for the purposes set forth.

2. In a circular rib knitting machine, the combination of vertical and horizontal needles, means for operating the same, and means for throwing said horizontal needles automatically into and out of operation, with holddowns adapted to hold the work down on the vertical needles when the horizontal needles are out of operation, and means for operating said hold-downs, substantially as described.

IOO

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o. The combination with the cam-cap a, the n, pawl n', tripping device q, and disk p, havdrawing-in cam c', the movable cam s px'o-` ing pin p', all being constructed and arranged vided with the pin g2 for operating the horisubstantallyas and for the purposes set forth. :o

zontal .needles of the sectors g and h, spindle CHARLES J. APPLETON.

5 7c,px'ovided with trippingdevicej,andspring Witnesses:

actuated spindle fry-of the sprocket wheel m, ROBT. A. KELLOND, and its pattern chaiu,-drivingshaftZ,Iatchet J. A. RENNIE.

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