US1797163A - Dial and cylinder interlocking mechanism - Google Patents

Description

Mud! 1931- H. SWINGLEHURST 97,163

nun AND cummm INTERLOCKING MECHANISM Filed Oct. 7. 1929 a wli' A INVENTOR HARRY SW INC-LEHURST 5 7:23 aZ-larneys' S WM cm UNIT D STATES Patented Mar. 17, 1931' VHABRY SWINGLEI-IURST, or Orr-anan new JERSEY, assienoa rosoor'r Ann w n- LIAMS, met, or new YORK; n. Y, A CORPORATION or MASSACHUSETTS DIAL AND CYLINDER inrxntooxrnc- EOHnNisM] Application 'filed October 7, 1929. "serial No. 398,018.

Y This invention has to do with circular knitting-machines of'the sorthaving a needle a direction but at the same time permit the fabric to pass downbetween them under the influence of the fabric take-up. I'provide a number of radially movable dogs on the under 10 side of the dial and a number of fixed dogs on the cylinder (Lo-operating therewith. Butts onv the inner ends of the movable dogs rest in a cam trackprovi'ded with successive retracting portions which are so related that some of the co-operating pairs of dogs are separated at one time and others at another time. By reason of this, the relation of in-v terlock between the dial and the cylinder is maintained at all times but the fabric is enabled to be drawn down without dragging on the dogs. I

The underlying thought here is to have a radially movable dog and a fixed dog and to provide one dog with a beveled face, that is, a face presented in such direction that it may engage the other dog to resist relative rotation yet so inclined from the radial that upon relative radial movement between the dogs a quick separation is effected. The engaging face of the other dog may be correspondingly beveled but preferably is curved.

In the drawings herewith, Figure 1 shows a part of the knitting head of a circular machine with a part of the dial broken away to show the interlocking, dogs and the cam track. The knitting instrui'nentalities and their as sociated parts are omitted. v

Figure 2 is a perspective view of the movable dog and the parts which support it for a radial movement and hold it on the dial. These parts are shown assembled and inverted from the position they occupy when on the dial.

7 Figure 3 is a view in section on the line 3-3 in Figure 2 but it shows the parts in their normal position, not inverted as in Figure 2.

The needle dial and the needle cylinder may be mounted and driven in any suitable r manner or they may be fixed and the cams for operating the needles may be rotated.

"Here howeverthere is [showna machine in which the needle cylinder 10 is fixed as is the dial 11 whiclris freely-mounted on the central spindle but is held'fr'om rotation there with by'meansof the interlocking dogs- The cylinder cam ring 10 is rotated. There: are four fixed dogs l2e'qually' spaced aboutand secured to the inner face of thefcylinder at its upper rim. Eachfh'as afacel3 that is vertical butis inclined away from a radial plane, its inclination being such however that it islmo-re nearly radial than tai'rgential. 7 Each co-operating movable dog consists of a shank 14 with'a 'head 15 at its outer end and a butt 16 at its inner end. The he'ad'has a downward extension l'Zto correspond to the hei-ghtof the inclined verti'c-al'fac'e 13 of the oo-O eratin fixed dog-and has also a nose l8 offset toward the fixed dog. The surface 19 of this nose is 'curved a'n'd thusfit has substan- PATENT,

tiallya line contact with the flat face 13" of the Y fixed dog, The result of thisis that upon 7 retraction of the movable dogs on a radial 1 or substantially radial line,' there is no appreciable slidingof the one dog on the other' but a quickseparationoccurscreating a space between the co-operating parts of the two dogs.

When the movable dog is unretracted, there is an engagement between these 'parts such that forces are transmitted between the cylin d'er dog and the dialdog along a practically v tangential line so that the major component of the force exerted is effective in resisting a turning of the dial. 7 The shank of the movable dog is rectangular in cross section and isre'ceived in a similarly shaped slot 20 in ablock 21 that is adjustably mounted on a plate 22 secured to the under sideof'the dial 11. A sidewise adjustment of the block is made possible by the fact that the screws 23 which hold the block and. theplate to the dial extend through enlarged holes 24 in the side flanges 25 of the block. A pairof pins 26 are mounted on either side of the plate 22 and extend through slots 27 in the c side flanges ofethev block; These pins carry adjusting screws 28 that bear against the. side faces of the main partof the block, thus de- :termining between them the location of the block on the plate within the limits permitted by the enlarged holes 24 and the slots 27. The

assembly, the cam ring being put on from becap plate 29 holds the shank of the dog in its slot 20 in the block 21.

The butt at the inner end of the shank of each dog is a roller disc and rests in a shallow groove 30 formed in a ring that is sup ported on a bracket 31. The bracket rotates with the central spindle in the direction indicated by the arrow in Figure 1. Thehub 32 to which the dial plate '11 is secured rests 011 a roller bearing (not shown) on a collar which turns with the spindle. At six equally spaced points about the groove 30'are re tracting cams 33 and opposite each one is a concavity 34 in the inner face of the groove to permit the roller 16 to be withdrawn by the cam. ,The width of the groove 30 is greater than that of the roller butt 16 to facilitate the neath after the dial plate is in place and then adjusted until the rollers 16 rest properly in the groove. The retracting cams are so related to one another that only two, andthese diametrically opposite, dogs are retracted at a time. The action of the retracting cam is to move the shankof the dial dog radially inward, thus separating the nose 18 at its outer end from the inclined or'beveled face 13 of the associated fixed dog to permit the fabric to slide between the two dogs. The sidewise adjustment of the block makes it possible to fix with nicety the lineof contact between the nose of the movable'dog and the beveled face of the fixed dog. r

The underlying thought of my invention may be used with-various arrangements of the parts involved and I therefore wish to include within the scone of the protec'tionafforded by a patent all variations from the form shown here which may come within th fairrange of the following claims.

I claim V 1. Mechanism for interlocking a needle dial and a needle cylinder in a circular knitting machine, comprising a radially movable dog on one of said elements and a fixed dog on the other, one of said dogs having a face inclined away from the radial, in combination with means for, reciprocating the radially moving dog at each revolution.

! 2. Mechanism for interlocking a needle dial and a needle cylinder in a circular knitting. machine comprising. a radially movable dog on the dial and a fixed dog on the cylinder, said fixed dog having a face inclined away from the radial and said movable dog having a head with a curved surface adapted to engage said face, in combination with means for reciprocating the radially moving dog at each revolution.

3. In a circular knitting machine, a needle. dial and a needle cylinder with interlocking xmechanism comprising'a radially movable dog and a fixed dog in such engagement as to engaging face of one dog being beveled, in combination with means for reciprocating the radially moving dog at each revolution.

4. In a circular knitting machine, a needle dial and a needle cylinder with interlocking mechanism comprising'a radially movable dog and a fixed dog in such engagement as to resist relative rotation in one direction, the engaging face of one dog being beveled and thatof the other being curved, in combination with means for reciprocating the radially moving dog at each revolution.

5. In a circular knitting machine, a needle dial and a needle cylinder, interlocking mechanism therefor comprising a radially movable dog on the dial, a support for the movable dog and a fixed dog on the cylinder,

.andmeans for adjusting the support; for the extending butt at its inner end, in combination with a circular groove provided with cams for actuating the dogs on thedial, said groove being wider thanrsaid butts.

In testimony whereof I have signed my name to this specification.

HARRY SWINGLEHURST.

resist relative rotation in one direction, the

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