US545809A - Chusetts - Google Patents

Description

(No Modl.

0, M. M-USGROVE & A. sMiTH,

m W x mm m/ I KNITTING MAQHINE. No. 545,809.

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CHARLES M. MUSGROVE AND AUGUSTINE SMITH, OF PITTSFIELD, MASSA- CHUSETTS; SAID SMITH ASSIGNOR TO SAID MUS GROVE.

KNITTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 545,809,. dated September 3, 1895.

' 7 Application filed July 23 1894. Serial No. 518,295. (No modeLl .To aZZ whom it may concern.-

Be it known that we, CHARLES M. MUS- onovn and AUGUSTINE SMITH, citizens of the United States of America, residing at Pittsfield, in the county of Berkshire and State of Massachusetts, have invented new and useful Improvements in Knitting-lvlachincs, of

which the following is a specification.

i while the cylinder and work thereon continue their revolution successively to revolve, a discontinuance of the closing of the beards of the needles as they come adjacent the presser-wheel, all so that the lower most loops of the tubular fabric already formed and revolving with the cylinder may not be cast off from the needles, but so that the work, in so far as it has been perfectly completed, remains in a condition to have the broken yarn again easily connected,so that the knitting maythen be continued without any necessity of resetting or having to again loop in the knit fabric relative to the needles, or of otherwise having to perform any slow, difficult, 0r bothersome operation.

The invention consists in the combination, with a presser-wh'eel mounted on a vertical axis which normally occupies its beard-closing position in relation to the needles as they in come subject to the'pressure of said wheel,and which presserwheel 'is' mounted for a rising movement on the line of its axis, of a device which comprises a spring, or like actuating agency for elevating the wheel above its beard-closing relation to the needles, and a trigger-like part which rcstrains said wheel-shifting device and which is engaged and supported by the yarn so long as the latter is continuous, and which, on the breaking of the yarn which supports it, effects the release of the presserwheel-elevatin g device. Said arm and trigger connections constitute the detent, as will bc understood.

The invention also consists in particular constructions and combinations of parts, all substantially as will hereinafter fully appear and be set forth in the claims.

Referencejs to be had to the accompanying drawings, in which- Figure l is a perspective view of so much of a circular-knitting machine with the prescut improvements operatively applied thereon as will enable a person skilled in the art to readily comprehend the present invention. Fig. 2 isa vertical section through the presserwheel, showing the device which lifts the same above its beard-closing relation. Fig. 3 is a view which shows the presser-wheel in its beard-closing relation to the needle, while Fig. 4 is a view which shows the said wheel lifted from its board-closing relation. In the drawings, A represents the rotary needle-cylinder with the series of knittingneedles (1., each formed, as usual, with the hook-bend 10 and board 12, as a downward continuation of the bend, which beard has a spring reaction outwardly, as usual.

The push-down B and stitch-wheel O are arranged as usual.

D represents the presser-Wheel'mountedon the fixed support at one side of the needlecylinder and rotatingin a substantially horizontal plane with its edge in a compressing impingement against the beards of the knitting-needles. The presser wheel rotates on the vertical stud b, on which the hub of the said wheel is loosely fitted, so that in addition to its rotary movement the wheel may also have an axial movement to rise from its seat upon the shoulder d at the base of said stud. 0n the support fortheshiftable presserwheel, and under said wheel, is a pivoted cam-lever f, having the arm g to which the actuating-spring is applied, and having the arm 7L, which is to be engaged by the pivotally-mounted trigger j. Said cam-lever, when o swung on its pivot by the force of its spring, exerts the elevating action upon the presserwheel. Normally the cam-lever is so held against the reaction of its spring that the resser-wheel may remain down, and when 5 so in lowered position the arm is restrained by the trigger, which may consist of the wire mounted on and extended from the rocking pivot i, and which extends from suchplace of engagement up to proximity to the yarn near the needle-cylinder, which yarn, so long as it is unsevered, has a supporting and free running engagement with and under said trigger. -Now, plainly, so long as the knitting-machine runs under proper conditions with the yarn continuous, the operation of all of the knitting mechanism, inclusive of the presser-wheel, is as usual, the presser-wheel causing, as the needle-beards are successively 'brought against it, a compression of the beards, as seen in Fig. 3, whereupon the loop an, already formed at the bottom of the work and corresponding to a given needle, may be drawn up over and oif from the top of the needle, forming, a new loop by. theyarn (seenat a iii-Fig. 3)in thehook-bend of the needle.

Now, in the event of the breaking of the yarn (whereupon there can be no new loop formed 'in case the last loop at the bottom of the work support for the wire triggerj, whereupon the latter swings down byits gravity, disengaging the arm 12-, which permits the cam-lever to forcibly swing by reason of the reaction of its spring, the cam exerting the elevating The impingement upon the presser-wheel. wheel being raisedfree and clear above the circular path of the bearded needles leaves the beards of the needles open, (see Fig. 4,)

whereupon, as plain, the loops at the bottom of the already knit work will not on being upwardly drawn be disengaged from the needles. This mechanism has been found unusually advantageoudjn that it operates.

with extreme' quickness and positiveness and with entire efiiciency.

Having thus described our invention, what we claim, and desire to secure by Letters Patout, isl 1. In a knitting machine, the rotaryne'edle cylinder carrying hooked needles, the presser wheel mounted on a fixed vertical axis at one side of the needle cylinder and rotating with its edge in proximity to the boards of the needles, a spring actuated cam lever mounted on a'support with its cam face in contact with the lower face of the presser wheel, said lever having an arm projecting therefrom, a wire trigger engaging said arm and resting on the yarn, whereby thebreaking of the yarn effects the release of the pressure wheel elevating, device, all combined substantially as described.

' ill Ina sirens? knitting machiu'a earn -f and'bearded needles, a fixed verticalsupport support having its edge in proximity to the needles, a three-armed lever supported on a pivot near said-wheel, one of the arms being a cam and having a bearing against the under surface of the presser wheel, the second arm having a spring connected thereto and tending to rock the lever on its pivot, and the thirdarm in engagement with the trigger,

.near said carrier, the presser wheel on said.

said trigger bearing on the unbroken yarn and dropping on the breakage of the yarn,

whereby the three-armed lever is swung and,

the presser wheel raised on its axis, all combined substantially'as described.

3. In a knitting machine, the cylinder and needles,-the vertically movable presser wheel, a cam mounted under said wheel and bearing thereon, a spring for actuating said cam to lift the presser wheel, and a detent acting normally to restrain the cam movement, said dete-nt controlled by the unbroken yarn, all combined and relatively arranged substantially as described.

CHARLES M. MUSGROVE. AUGUSTINE SMITH.

Witnesses:

AMBROSE J. SPENCER, WILLIAM SIPPERLY.

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