US1213004A - Knitting-machine. - Google Patents

Description

ALBERT M. PIGEON, OF NORRISTOWN, PENNSYLVANIA, ASSIGNOR TO WILDMAN MFG.

00., OF NORRISTOWN, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

KNITTING-MACHINE.

Application filed April 8, 1915. Serial No. 20,053.

To all whom it may concern:

Be it known that I, ALBERT M. PIGEON, residing a t Norristown, in the county of Mont gomery and State of Pennsylvania, have invented certain new and useful Improvements in Knitting-Machines, whereof the following is a specification, reference being had to the accompanying drawings.

The invention relates more particularly to a knitting machine having a needle cylinder on which spring beard needles are mounted for reciprocation andwhichbeards are closed for shedding the loops by individual pressers.

An object of the invention is to provide means for engaging the spring beard of the. needle for preventing vibration of the beard, when said needle is at the lower part of its stroke, and particularly at the time. when the needle is reversing its movement.

A further object of the invention is to provide'a needle cylinder wherein the partitions between the needle grooves are cutaway at their upper ends so as to prevent the beards of the needles striking the same, and so as to permit the pressers being thickened and insure. their engagement with the spring beards of the needles.

In the drawings which show by way of illustration, one embodiment of the invention, Figure l, is a partial vertical sectional view through the needle cylinder and the supporting ring at the upper end'thereo'f, showing my 1111 proved beardpresser and the construction of needle groove. Fig. II, is

a view similar to Fig. I, at a point in-th'e cylinder to show in section the cam for 'engaging the beard pressers. FigLIII, is a side view of a portion of they upper end of the needle cylinder, showing the spring beard needles and the plzessers which cooperate with the same in the position corresponding to that of Fig. I. Fig. IV, is a plan view of a section of the needle cylinder, showing the spring beard needles, the pressers and the web supporters. Fig. V, is a cross sectional'view on the line V, V, of Fig. I. Fig. VI,'is a perspective view of one of my improved beard pressers. Fig. Vll, is a perspective View of one of the yarn supporters. Fig. VIII, is a vertical sectional view through the upper part ofthe needle cylinder and a portion of the supporting ring, the needle and the presser be ng removed; and Fig. IX, isla vertical sectional Patented Jan.

view showing the needle cylinder, yarn support, spring beard needle and presser with the needle at the lower end of its reciproca- 1on. The invention consists generally in providing a' needle cylinder having needle grooves in which reciprocate spring" beard needles, beard pressers, one for each needle, which beard pressers are so constructed as to engage the beards of the needles to prevent vibration of the spring beards, during the lower portions of their stroke and particu- I larly when the needles are reversing. their direction of movement, which is likely to result in the crystallization of the inetal forming the spring beard, thereby rendering them fragileand subject to fracture.

The portions between the groovesof the needle cylinder are cut away at'the;upper ends so that the beard presser'rnay be-thick ened and thus form a widened surface which engages the s )ring heard of the needle andthis widened surface insures that the spring beard will always beengaged though the samemay be sprung slightly laterally. The cutting away of the partitions forming the needle groovesat the upper end of'the -needleeylinder insures that the spring beard of the needle when the needle is lowered will not strike the rib even though the spring beard be slightly bent out of normal position. Referring more in detail to the drawings, I have shown a needle cylinder 1, which is of the usual construction and is provided with spared partitions 2, forming needle grooves Mounted in the grooves 3, are needle jacks 4, which are provided with butts 5. Each Tack carries a needle 6, which is provided with a spring board 7. The needles are detat-hablyconnected'to the jacks and are reciprocated vertically in the needle grooves by suitable cams which engage the butts (3n the needle jacks.

At the upper end of the needle cylinder is a supporting ring 8, which is clamped to the needle cylinder by suitable set screws 9,

.which are adapted to'bear against a clamping ring 10. Mounted in suitable grooves in the ring 8, are yarn supporters 11, which are also provided with butts 12, adapted to be engaged by suitable ealns for moving thesame radially of the needle cylinder, Those yarnsupporters are of the usual construction. The needles and ]:l'(:l(S .are held in the needlecyhnder by suitable elastic bands 13,

. gages the notches 16, in the beard pressers and holds the same detachably in the needle grooves; That is to say, the lower end of the beard presser is tapered at 18, while the lower face of the notch 16, is likewise tapered but in an opposite direction, and this permits a beard presser to be withdrawn by force applied to the upper end thereof or inserted ina like manner at will. The lower end of the beard presser is termed with a slightly rounded projection 19, which bears against the needle and serves as a ful-, crum point for the presser. The pressers are slightly oscillated about this rounded projection by suitable cams 20, which are carried by the supporting ring 8. These cams may be adjustably and yieldingly mounted if desired. They are of the usual construction and further description is not thought necessary.

The partitions forming the needle grooves are cut away at 2 1, and from the level 22, to the upper end of the cylinder and substantially to the full depth of the needle channel leaving only a projecting rib whichis of substantially the diameter of the shank of the needle.

The upper portion of the beard presser is thickened as at 23, Fig. VI. This thicken ing of the presser affords a substantially broad engaging surface 35. The top of the beard presser'is provided with a cam incline ligand said beard presser is formed with a notch 27. This notch 37, is so positioned relative to the upper edge of the needle cylinder and the web supporters, as. to provide a clearance space, whereby a previously formed loop may be shed over the top of the needle during the formation of a stitch. The broadened surface 25, is so shaped and proportioned that when the needle beard has passed the notch 27, it will engage said surface and remain in engagen'ient with said surface during the remainder of the downward stroke of the needle and during the first part of the upward 'or return stroke of the needle and regardless of whether the cams 20, are in engagement with thebeard pressers or not. This insures that the spring board will be under tension during the lower portion of its stroke and particularly at the time when the motion of the needle is ab ruptly reversed. By cutting away the partition 2, of the needle cylimler at the upper end thereof. I am not only able to increase the width of the beard engaging surface25,

' on the presser for the needle, but I also in sure that the beard of the needle will not strike the ribs on the needle cylinder, if said beard is slightly bent laterally or displaced.

I have found that when the beards of the needles are free to vibrate during the abrupt reversal of the movement at the lowermost point in the needle wave, such vibration ultimately results in the crystallization of the needle beards and thereby renders them very weak, thus causing excessive breakage. In fine gage it is essential to bring the needles down through the fabric at as steep an angle as possible in drawing the new loops and also in backing them up to the idle level and this greatly increases the vibration above referred to. By my improved form of beard presser where'the spring beard is under tension at this criti all time, I am able to eliminate all this vibration and thus prevent crystallization which would otherwise result.

It is to be understood that changes in the details of construction and arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims. 7

llaving thus described my invention, I claim:

1. In a knitting machine, the combination of a needle cylinder, a series of spring beard needles carried thereby, and means for engaging the beards of the needlesfor closing said needle beards for shedding the yarn loops over the same. and for engaging the beards of the needles when said needles are at the lower end of their-stroke :for preventing vibration of the needle beards upon reversal ofthe movement of the needles.

2. In a knitting machine, the combination of a needle cylinder, a series of sprin beard needles carried thereby, a heart presser for each needle mounted on the nee- 'dle cylinder and having means tor engaging and closing. the heard of the needle for shedding the yarn loops over the same, and means for engaging the needle heard when the needle is at the lower end of its reciprocation for preventing-vibration of said nee dle beard upon the reversal of the movement of the needle.

3. In a knitting machine, the combination of a needle cylinder. a series of spring beard needles carried thereby, a beard presser for each needle mounted on the'needle cylinder, means for engaging said beard pressers :for causing said pressers to close the beards for shedding the yarn loops over the same, and said pressers having means for engaging the needle beards when the needles are at the lower end of their reciprocation for prelocated in said grooves, a beard presser for i -each needle located in each needle groove,

cams for engaging the upper ends of said .beard pressers for swinging the same to close the beards of the needles to permit the yarn loops to passover the same, said beard pressers having means for engaging the spring beard needles located in said grooves, said partitions being cut away at the upper ends thereof to a point below the lowest extreme position of the needle'beards during the reciprocation of the needles, a beard presser for each needle located :between' the partitions on the cylinder, said beard pressers being thickened above the ends of the cut away partitions, so as to provide a wide bearing surface for engaging the beard of the needle.

G. In a knitting machine, the combination of a needle cylinder having a series of spaced partitions forming needle grooves, spring beard needles located in said grooves, said partitions being cut away at the upper ends thereof to a point below the lowest extreme position of the needle beards during the reciprocation of the needles,-a beard presser for each needle located in the groove between the partitions and extending above the cut away ends of the partitions, said beard presser being thickened above said ends of the partitions to provide a wide bearing surface for the beard of the needle, and said pressers bein constructed so o engage the beards of the needles while t e needles are at the lower ends of their stroke for preventing the beards from vibrating.

7. In a knitting machine, the combination of needle cylinder having a series of spaced partitions forming needle grooves, said par- ,titlons being cut away at their upper ends,

a series of spring beard needles mounted in said groovesga beard presser for each needle mounted in. the needle groove, and extending above the needle cylinder, said beard presser having a cam surface at its upper end and thickened to form a wide surface for engaging the beard of theneedle for closing the same to shed the yarn loop, and a cut away portion beneath said widened portion, providing a clearance space for said loop.

8. In aknitting machine, the combination of a needle cylinder having a series of spaced partitions forming needle grooves, said partitions being cut away at their upper ends, a se ies of spring beard needles mounted in said grooves, a beard presser for each needle mounted in the needle groove, and extending above the needle cylinder, said beard presser having a cam surface at its upper end and thickened to form a wide surface for engaging the beard of the needle for closing the same o shed the yarn loop, and a cut away portion beneath said widened portion for forming a clearance space for said loop, eachbeard presser being thickened beneath said cut away portion and constructed so as to form a wide surface for engaging the spring beard of the needle while said needle is at the lower end of its stroke and reversing its movement.

9. In a knitting machine, the combination of a needle cylinder having a series of grooves formed therein, a spring beard needle for each groove, a beard presser for each needle located in the needle groove, said beard presser having a rounded lower end adapted to engage the needle, a tapered upper end, a notch beneath said tapered upper end, and a widened surface below said notch adapted to engage the heard of the needle when said needle is at the lower end'of its stroke.

In testimony whereof, I have hereunto signed my name, at Philadelphia, Pennsylvania, this fifth day of April, 1915.-

ALBERT M. rIeEoN.

Witnesses:

JAMES H. BELL, E. L. FULLERTON.

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