US1150567A - Knock-over-bit mechanism for knitting-machines. - Google Patents

Description

M. ZWICKY. KNOCK-OVER BIT MECHANISM FOR KNITTING MACHINES.

APPLICATION ElLED DEC. 27. 19 13.

Patented Aug. 17, 1915.

2 suns-sum I.

M. ZWICKY. KNOCK-OVER BIT MECHANISM FOR KNITTING MACHINES.

. APPLICATION FILED DEC-27, I9|3- Llfifififi? Patented Aug.- 17, 1915.

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UNITE STATS PATENT @FFTQE.

I MELGHIOR ZWICKY, OF WYOMISSING, PENNSYLVANIA, ASSIGNOR T0 TEXTILE MACHINE WORKS, 015 WYOMISSING, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

KNOCK-OVER-IBIT MECHANISM FOE KNITTING-MACHINES.

Specification of Letters lPatent.

- Patented Aug. 17, 19.15.

Application filed December 27, 1913. Serial No. 808,932.

ToaZZ whom it may concern Be it knownthat I, MELCHIOR ZWICKY, a citizen of the United States, residing at Wyomissing, in the nounty of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Knockagainst objectionable slackening of the yarn during formation of the loops, and thereby improve the quality of the knitted fabric. Such slackening is ordinarilyincident particularly to the freeing of the loops by the action of the knoek-over-bits, and effort has heretofore been made to overcome this by intermittently shifting the latter relative to the loop forming devices. My invention provides an improved mechanism for this purpose as hereinafter fully described.

Figure 1 is a cross-sectional view showing my improved mechanism applied in preferred manner to a straight knitting machine of ordinary construction. Fig. 2'is a corresponding partial plan view. Figs. 3, hand 5 are enlarged cross-sectional'views showing the pivotally carried knock-over bit bed in several positions assumed during operation of the machine, with corresponding positions "of the cooperating sinkers and dividers.

Figs. 6, 7,-and 8 are separateviews of the fixed sinker-and-divider bed; and Figs. 9, 10, and 11 are'separate views of the rockably ordinary straight knitting machine as are necessary to a showing of my improved knock-over-bit mechanism in connection therewith; the usual cam-shaft 2 being indicated as the means through which the required intermittent rocking movement is impartedto my pivotally mounted knock-overbit carrier bed 3, and the machine frame 4 as the support for my pivot-bearing sinkerand-divider .bed attachment, and for the v rocking-lever mechanisinemployed.

The pivot-bearing attachment, as shown,

comprises a longitudinally extending sinkerand-divider bed 10, in which the usual transversely-movable sinkers and dividers 11 and 12 are mounted; and end bearing lugs 13 in which is rockably mounted the knock-overbit carrier bed 3. The latter has end bearing arms 14, 14. engaged in said bearing lugs 13,

and the projecting end of one of these arms, 14, has a depending lever 15 fixed thereto through which a rocking movement is imparted to the carrier bed 3 as hereinafter described. The series of knock-over'bits 16 is fixed to the carrier bed so that their extend-- ed end portions stand normally at an angle of approximately forty-five degrees to the pivotal center of the carrier bed, and are adapted to swing in an are 17 toward and away from thetransversely moving sinkers and'dividers with which they cooperate in the knitting operation. The bed 10 is fixedly secured to the-machine frame by means of bolts 18 as indicated, and the sinker and dividers mounted therein are operated as usual. The pivot-bearing lugs 13 of the attachment v5 depend from the end portions of the sinkerand divide'r bed 10 thereof, and form in connection with the detachable bearing caps 20, pivot bearings the centers of which are located under the sinkers and dividers and Well inside of the extremities of the latter as indicated: so that the knock-over bits r 16, which are secured in the pivotal carrier bed 3, are swung by the rocking of the latter to varying-cooperating positions relative to the sinkers and dividers 11-12, as hereinafter described in connection with Figs. 3, 4t, and 5.

The lever mechanism employed to transmit the desired rocking movements to each carrier-bed 3 and its series of knock-overbits 16, comprises a cam-contacting lever 25 which is held in "eontact by a spring 26, with the periphery of a cam disk 27 or 27', having a projection 28, or 28, which imparts a determined swing to said lever during a determined portion of the'regular r0- tation of camshaft 2. This swing is transmitted through a link 30 to a rock-shaft 31 having arms 32' and 33, the latter of which is connected by a link 34 to the fixed arm 15 .on the carrier bed 3, thereby rocking the latter so as to swing .the knock-over bits to different positions desired relative to? the sinkers and dividers. As will hereaft'iggfurther appear these relatire positions should be varied to meet different conditions occurring; the knitting ofla'dies? stockings for instance involving the use of a welting bar 'in starting the stocking and forming a 'double top or welt, which necessitates the practicable approach of the knock-over bits. for the freeing of the loops. To accomplish this I employ the two cam disks 27 and 27, the lever-swinging projections 28, 28 of which vary somewhat in height and location, as indicated, so as to differently swing the lever 25 as required; at the same time providing means for conveniently shifting said lever to one or other of said cam disks. This means comprises, as shown, a" shifting lever 40 loosely pivoted at 41 to the machine frame so as to slide a shaft 42 having fixed thereto a shifting fork 43 adapted to engage and shift the anti-friction roller 44 of the lever 25 to one or other of the cam disks as desired. 4

Several of the positions to which the. knock-over bits are swung at different stages of the knitting operation, with relative positions of the sinkers and dividers, are indi catedin enlarged Figs. 3, 4, and 5. Fig. 3 indicates a maximum clearance between the sinkers and knock-over bits. Fig. 4 indicates a position when the welting bar is employed, the lever 25 being then in engagement with the cam disk 27 alesser rocking movement is imparted to the knock-over bit carrier bed 3 when the cam projection. 28

to the sinkers than in Fig. 4, as is practicable during ordinary knitting; the lever 25 being then in operating... engagement with the larger cam projection 28- of disk 27. This pivotal swinging of the knock-over-bit bed 3 upon its bearings 14, 14 permits of always keeping the rear hump of these bits as close as possible tothe forward end of the sinker-and-divider bed 10, against which the needle beards are pressed, as shown, while providing the varying clearances of the outer end of these bits 16 from the sinkers and dividers 11 and 12, for the better knocking off of the formed loops without undue slack.

lVhatI claim is V In a full fashioned knitting machine comprising movable needles, sinkers, and dividers; a frame-secured attachment forming a sinker-and-divider bed and provided with bit-carrier bed bearings, a knock-over-bit carrier bed rockably mounted in said bearings, and means for imparting an intermittent rocking movement to said carrier bed. V.

In testimony whereof I aiiix my signature in presence of two witnesses. I

" MELCHIOR ZWIGKY.

Witnesses:

D. W. STEWART, A. M. KURTZ.

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