USRE14369E - Albert m - Google Patents

Description

A. M. PiGEUN.

KNITTING MACHINE.

APPLICATION FILED JULY 5. 1917 1 Reissued Sept 25, 1917. I

FICi

. a I y !k after the loop has been shed. In spring "To all whom it may concern:

UNITED STATES PATENT orrron.

AIMEE-1 M. PIGEON, 0F NOBRISTOWN, PENNSYLVANIA, ASSIGNOR T0 'WILDMAN MFG. CO., or NOBBISTOWN, PENNSYLVANIA, A CORPORATION .OF PENNSYLVANIA.

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Specification of Rei'ssued Letters Patent. Reissfled Sept. 25, 1917.

Original Io. 1,21a,oo4 dated January 16, 1917, Serial no. 20,053, med April 2;, 1915. Application to:

reissue filed July 5, 1917.

Be it known that I, ALBERT M. PIoEoN, residing at Norristown, in the .county of Montgomery 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 to knittin machines having spring beard needles, the beards of which are closed by pressing means for sheddino the loops.

An object of the invention is to provide means for engaging the spring beard of the needle for preventing vibration of the beard,

beard machines employing vertically movable needles the vibration referred to occurs when the needle is at or approaching the lower part of its stroke and particularly at the time when the needle is about to re'-' verse its movement.

- A further ob ect of the invention is to provide a needle cylinder wherein the partitions between the needle grooves are cut' away at their upper 'ends so as to prevent the beards of the needles-striking the same, and so as to permit the pressers bein: 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 I, is a artical vertical sectional iew through a nee le cylinder and the supporting ring at the upper end' thereof, showing my improved beard presser and the construction of needle groove;

Fig. II, is a view similar to Fig. I, at a point in the cylinder to show in section the cam for engaging the beard pressers.

Fig. III, is a side view of a portion of the upper end of the needle cylinder, showing the spring beard needles and the pressers 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.

Serial No. 178,873.

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. VII, is a perspective view of one of the. yarn supporters. Fig. VIII, is a vertical sectional view through the upper part of the needle cylinder and a portlon of the supporting ring, the needle and the presser being removed;

' and Fig. IX, is 'a vertical sectional view showing the needle cylinder, yarn support, spring beard needle and presser with the needle at the lower end of its reciprocation.

In the preferred embodimentfor a circu I lar knitting machine as herein shown and described, theinvention consists generally in PI'OVldIng the needle grooves with spring beard needles and beard pressers, which. beard pressers are so constructed as to en-' V needle cylinder are cut away at the upper ends so that the beard presser may be thickened and thus form a widened surface which engages the spring beard of the needle and needle cylinder insures that the spring heard of the needle when. the needle is lowered will not strike the rib even though the spring beard beslightly bent out of normal.

position.

Referring more in detail to the drawings, I haveshown a needle cylinder 1, which is of the usual construction and is provided with spaced partitions 2, forming needle grooves 3. Mounted in the grooves 3, are needle jacks i, which are provided with butts 5. Each jack carries a needle 6, which is provided with a spring heard 7. The needles detachably connected to the jacks and are reciprocated vertically in the needle grooves by suitable cams which engage the butts on the needle jacks.

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

which are adaptedto bear against a clamp ing ring 10, Mounted in'suitable grooves in thering 8, are yarn s1,ip1')orters 11, Which are also provided with but-ts l2, ada] ')ted to be engaged by suitable cams for moving the same radially of the needle cylinder. These yarn supporters are of the usual construction. The needles and jacks are held in the needle cylinder by suitable elastic bands 13',which are located in the circumferential groove 14, formed in the needle cylinder. Located in e'ach needle groove is a beard presser 15. This beard presser 15,- is' provided with a suitable notch 16, at its lower end, and an elastic band 17, also located in a circumferential groove in the cylinder, engages the notches 16, in thebeard pressers and holds thesame detachably inthe needle grom'es. Thatis to say, the lower. end of the beard presser is tapered at 18, whilethe lower face of the notch 16, is likewise tapered but in an oppo side direction, and this permits a beard presser to be withdrawn by"force applied tothe upper end thereof or inserted in a like manner at will; The lower end of the beard presser is formed. with a slightly rounded projection 19, which bears against the needle and serves as a fulcrum'point for the presser. The pressers areslightly o'scillatedabout this "rounded projection by suitable cams 20,

which are carried bythe supporting rings. These cams'may be adjustably and yieldingly mounted if desired. .hey are "of the usual construction and further description ,is

not thought necessary.

The partitions forming the needle grooves are cut away at 21, 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 ribwhich notch 27. This notch 27.

dindcr' and the Web isv of substantially the diameter of the shank otthe needle.

The upper portion of the bcardpresser is thickened as at 23, Fig. V I. This thickening 'of the presser affords a substantially. broad engaging surface The top of the beard ]')]I'(1SSGI' is provided with a cam incline 26. and said heard n'csser is Formed \vitha is so positioned of the uccdlc cylsupporters. as to provide space, whereby a previously relative tolhc upper edge a clearance 'ding of the loops,

lization of of a needle carrier;

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 sur iace andremain in engagement with said surface during the remainder of the downward stroke of the needle and during the first part ot the upward or return stroke of the needle and regardless of: Whether the cams 20, are in migagement with the beard pressers or not. This insures that the spring beard will be undertension durii'igthe lower portion of its strokesand particularly at the time when the motion of the needle is abruptly reversed. By cutting away the partition 2, of the needle cylinder at the up per end thereof, I am not only able to in crease the Width'of the beard engaging surface 25, on the presser for the needle, but I also insure that the heard of the needle will not strike the ribs on the needle cylinder,

if said heard is slightly bent laterally or dis placed.

I'have found that when the beards of the needles are free to vibrate after the' shedand particularly during of the movement at the lowermost point in the needle wave, such vibration ultimately results in the crystalthe needle beards and thereby 'rendersthem very weak, thuscausing excessive breakage. In line gage it is essential the abrupt reversal 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 jup to the idle. level and this greatly increases the vibration above referred to. By my im- -proved formof beard presser where the spring heard is undertension at this critical time, I am able to eliminate all this vibra tion and thus prevent crystallization which would otherwise result. 1

I It is to be understood that changes in thedetails of construction and arrangement of the parts may be made without departing. from the spirit of the invention as set forthin the'appended claimsi Having thus described my invention, I claim: a I

1. In a knitting machine, the combination of a needle carrier; spring beard needles mounted therein; means for closing the needle beards to permit the shedding of the loops: and means for engaging the beards,

whereby vibration thereof, after the she-d ding of the loops, is prevented.

2. In a knitting machine, the combination spring beard needles mounted therein; means for moving said needles longitudinally; means for closing the boards or" saidneedles to permit the shed ding oi the yarn loopsover thesame; and means for engaging the beards of the needles when said needles are approaching the end of their receding movement; whereby vibration of theneedle beards, after the shedding of the loops, isprevented.

, 3. In a knitting machine, the combination of a needle cylinder; a series of spring beard needles carried thereby; means for closing the needle beards to permit the shedding of the loops; and means for engaging the needle beards, whereby vibration thereof, after the shedding of the loops, is prevented.

4; 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 needles for 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 of the movement of the needles;

5. In a knitting machine, the combination of a needle cylinder; 21 series of spring beard needles carried thereby; a beard presser for each needle mounted on the needle cylinder and having means for en-' gaging and closing the beard 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 sa d needle beard upon the reversal ofthe movement of the needle.

6. 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 forengaging 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 preventing vibration of said needle beards upon the reversal of the movement of the needles. I

7. In a knitting machine, the combination. of a needle cylinder having needle grooves therein; a series of spring beard needles locatcd in said grooves; a beard presser for each needle located in each needle groove,

cams for cngagii'ig the upper ends of said beard pressers for swinging the same to close the beards of the needles to perm t the yarn loops to pass over the same, said beard pressers having means for engaging the 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 repartitions 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 board prcsser being thickened above said ends of the partitions to provide a wide bearin g surface for the board of the needle, and said pressers being constructed so as to engage the beards of the needles while the needles are at the lower ends of their stroke for preventing the beards from vibrating.

10. In a knitting machine, the combination of needle cylinder having a series of spaced partitions forming needle grooves, said partitions being cut away at their upper ends, a series of spring beard needles mounted in said grooves, a beard resser 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 heard of the needie 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.

11. In a knitting 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 series of spring beard needles mounted in said grooves, a-beard resser for each needle mounted in the nee le 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 heard of the needle for closing the same to shed the yarn loop, and a cut away portion beneath said widened portion for forming a clearance space for said loop, each beard presser being thickened beneath said cut away portion and constructed so as to form a Widesurfaee for engaging the spring heard of the needle While said needle is at the lower end'of, its stroke and reversing its movement.

12. 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 heard 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 beard of the needle when said needfe is at the lower end of its stroke.

In testimony whereof, I have hereunto slgned my name at Norristown,' Pennaii, this 30th day of June, 1917. ALBERT M. PIGEON. Witnesses: 1

.E. R. ROBERTS,

OWEN BAnLARD.

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