US1502486A - A cobpobation of penn - Google Patents

Description

F. W. ROBINSON YARN CHANGE BINDER FOR CIRCULAR KNITTING MACHINES Filed May 1, 1923 2 Sheets-Sheet 1 July 22 1924. 1,502,486

' F. W. ROBINSON Filed Mayl. 1923 2 sheets-sum 2 I NVENTOR:

ATTORNEYS.

atented July 22, 1924.

1,502,486 PATENT OFFICE.

FRANK W. ROBINSON, OF READING, PENNSYLVANIA, ASSIGNOR TO scmrnmn HOSIERY, MILLS, INC., 01? READING, PENNSYLVANIA, A CORPORATION OI PENN- SYLV Application filed May 1,

To all whom it may concern:

Be it known that I, FRANK W. Ronmson, a citizen of the United States, residing at Reading, county of Berks, State of Penns lvania, have invented a new and useful 1 arn-Change Binder for Circular-Knitting Machines, of which the following is a specification.

My present invention comprehends a novel construction and arrangement of a yarn change binder for circular lmitting machines of the type in which a revolving cylinder is employed; y

In machines of this type, as ordinarily constructed, the binder is hung in the center of the cylinder. One of the objects of my present invention is to devise a novel construction of aarn change binder which is constructed and arranged in such a manner that the space in the center of the cylinder, which is ordinarily taken up by the binder, will be left free so that it can be utilized for other purposes.

It further comprehends a novel construction of a yarn change binder wherein a hook is directly suspended over the yarn which is out of knitting action, and, when a change of yarn is to take place, the yarn finger drops and holds the yarn which is beingfed on the outer circle of the needles. The hook is so pivoted that it holds the other end of the same yarn at the inner circle to cause it to lie across the path of the needle.

When the yarn is knitted in, the binder drops, it then opens and the yarn is then released. The binder is nowin a position to receive the yarn which is to come out of knitting action. The yarn finger which carries such yarn first rises to such a position that the yarn is brought out of its knittin position. Thereafter the binder closes an the yarn is severed.

It further comprehends novel yarn positioning mechanism, yarn binding mechanism, yarn severing mechanism and means for occasioning the cyclical operation of said mechanism.

Other novel features of construction and advantage will hereinafter more fully appear in the detailed description and the appended claims.

For the purpose of illustrating my invention, I have shown in the accompanyin drawings a typical embodiment thereo YARN-CHANGE BINDER FOR CIRCULAR-KNITTING MACHINE.

1923. Serial No. 635,839.

which is at present preferred by me, since this embodiment will be found in practice to ive satisfactory and reliable results. It is, however, to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalitiesas herein shown and described.

Figure 1 represents, in side elevation, a portion of a circular machine in conjunction with which yarn change binders, embodying my invention, are employed. v

Figure 2 represents, in front elevation, the yarn change binder and certain of its adjuncts.

Figure 3 represents a top plan view of the yarn change binder.

Figure 4 represents a section on line 4-4 of Figure 3.

Figure 5 represents, in side elevation and in detached position, a portion of the yarn severing and binding mechanism.

Figure 6 represents a section on line 6'6 of Figure 5.

Figure 7 represents, in detached position, a top plan view of the hook and the shaft which carries it.

Figure 8 represents diagrammatically the relative position of certain parts of the yarn change binder when one yarn is in the hind er and the otheryarn is in knitting action.

Fi re 9 represents diagrammatically the relative positlon of certain of the parts when one yarn is in knitting action and the other yarn has'just been brought into knitting action.

Figure 10 represents diagrammatically the relative position of certain of the parts when both yarns are in knitting action and the binder is open to release the new yarn which is to be knitted in.

Fi re 11 represents diagrammatically the relative position of the parts shown in Figures 8, 9 and 10, when one yarn is in knitting action and the other yarn is out of knitting action and in position to be received by the binder. 4

Similar numerals of reference indicate corresponding parts.

Referring to the drawings,

1 designates any usual or conventional type of circular knitting machine, the construction and operation of which are well known to thoseskilled in this art. 2 designates the conventional latch ring on which the working parts of the yarn change binder are mounted. 3 designates a yarn change binder, embodying my invention. The yarn change binder has its working parts supported in and carried by a bracket 4 which is secured to the latch ring by means of fastening devices 5. 6 designates a rod fixed in the bracket 4 and on which is loosely mounted a lever 7 which is provided with the hubs 8, see Figure 2, the functions of which are to serve as spacing members. The lever 7 is provided intermediate its ends with a depending enlargement having the operative cam face 9 with which cooperates the forward end of a'lever 10 which is fulcrumrd at 11 to a stationary portion of the machine frame. The lever 10 has connected with it a rod 12 which is. also connected to a lever- 13 suitably fulcrumed and controlled by a cam 14 carried by the conventional pattern drum of a circular knitting machine. The lower end of the lever 7 forms a clamping or binding member 15.- The lower end of the lever 7 is bifurcated to provide a knife 16 having a cutting edge 17. 18 designates a movable knife which is pivoted at 19 between the binder 15 and'the knife16, and it is bevelled' off to form the cutting edge 20, see Figure 6. The knife 18'is provided at its upper end with the longitudinally extending slot 21 into which extends a pin 22 carried by an adjusting arm 23 which is provided with a slot 24 through which is adapted to pass the fastening devices 25 which engage the arm 26 secured to the bracket 4 in any desired manner. It will thus be seen that the arm 23 can be adjusted to vary the action of the knife. The lever 7 is normally maintained in its downward position by means of a spring 27 one end of which is fixed to said lever 7,as at 28. For purpose of illustration, I have shown this spring as encircling the hub 8 and its free end be rs against a stationary portion of a brac et 4. The upper end of the lever 7 is provided with a bevelled or cam face 29 against which is adapted to bear the forward end of a manually actuated lever 30 which is fulcrumed at 31 to the bracket 4. By moving lever 30 toward the ri ht in Fig. 4 the lower end thereof is causef to abut against; cam face29 andthrough theinstrumentality of lever 7 hold the binder 3 in raised position so 'that'the loose end of thread is held in said binder.

32 designates an arm which is fixed to a sleeve 33 which is loosely mounted on a rod 34. The forward end of the arm 32 forms a depending hook 35. The arm 32 is provided with a laterally extending member 36 which overhangs the yarn fingers 37 and gnomes to receive it, and the .opposite end of such spring is connected to a stationary portion of the machine.

The operation will now be readily apparcut to those skilledin this art and is as fol- It is common in machines of this type to change from one type of yarn to another, for example, from silk to cotton and from cotton to silk. It will thus be understood that the yarn finger 37 receives one type of yarn and the yarn finger 38 another type.

Referring now more particularly to'the diagrammatic views seen in Figures 8 to 11 inclusive, I have shown in Figure 8 the position which the parts assume when-the yarn 43 co-operating withthe yarn finger 38 is in knitting action, while the yarn finger 37 has its yarn 44 out of knitting action and its free end is held in the binder.

The yarn fingers 37 and 38 are actuated in the usual manner such as is well known in the art and I have therefore deemed it unnecessary to describe and illustrate in detail the construction for operating these yarn fingers. In the first position illustrated in Figure 8, the yarn finger 37 is in its raised position while the yarn finger 38 is in its down position. The yarn finger 37 is moved downwardly from its position seen in Figure 8 into that seen in Figure 9, and as the hook 35 is held in its raised position by one of the fingers, the hook 35 will drop when both yarn fingers are down and will be in the position seen in Figure 9, so that the hook 35 will receive the yarn 44 which is still held in the binder. In the next position seen in Fi re 10, the yarn fingers 37 and 38 are both d o wn as well as thehook 35 controlled by them. The

binder is also in its down positionand has released the yarn 44 which is now in knitting action as well as the yarn 43.

In" the next stage of the operation, the

In the next stage of the operation, the knife 18 moves upwardly thereby severingthe yarn 44, and clamping it between the knife 18 and the binder 15.

It will be understood that the cam 14 through the lever 13 and rod 12 causes the lever 7 to be raised and lowered at the proper times. The opening and closing of v the knife 18 is caused by the movement of the lever 7, since the knife 18 is provided with a cam slot 21 into which extends the pin 22 so that, as will be apparent, the upward movement of the lever 7 on its fulcrum causes the knife 18 to close and the downward movement of such lever causes the knife 18 to open. 7

It will be apparent that the action just described with relation to the yarn 44 takes place in a similar manner with respect to the yarn 43 at the proper time so that either yarn, at will, depending upon the adjustment of the machine, can be brought into or out of knitting)action. If the latch ring were raised, the inder would drop unless some means are provided for looking it in position, and, for this purpose, I provide the manually actuated lever 30 which will retain the binder in its raised position so that the loose end of the thread will be held in the binder.

It will now be apparent that I have devised a novel and useful yarn change binder for circular knitting machines which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have, in the present instance, shown and described an embodiment thereof which will give in practice satisfactory and reliable results, it is tobe understood that this embodiment is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A yarn change binder, comprising a hook suspended over the yarn which is out of knitting action, a plurality of yarn fingers and their actuating means, said yarn fingers controlling the movement of said hook, and automatically actuated yarn binding and cutting mechanism.

2. A yarn change binder, comprising. in combination with the needle cylinder, of a hook pivotally supported to be suspended over the yarn which is out of knitting action, the yarn fingers and their actuating means, said yarn fingers controlling the position of said hook, and automatically controlled yarn severing and binding mechanism.

3. A yarn change binder, comprisin in combination with the yarn fingers and t eir actuating means, of a hook movably mounted at one end and provided with a laterally extending arm to overhang the yarn fingers, yarn severing and binding mechanism, and pattern controlled means for actuating said yarn severing and binding mechanism.

4:. A yarn change binder, comprising in combination with the yarn fingers and their actuating means, of a hook pivotally carried and having means overhanging said yarn fingers, a lever having a bifurcated end, a knife movably mounted in said end and contributing therewith to form yarn binding and severing mechanism, and pattern controlled means to actuate said lever.

5. A yarn change binder, comprising in combination with the yarn fingers and their actuating means, of a hook. pivotally mounted at its rear end and provided with means to overhang said fingers, a lever having its free end bifurcated, a knife movably carried in said bifurcated end, contributing therewith to form a cutter and a binder and provided with a slot, a fixed member extending into said slot to eflect the opening and closing movement of said knife when said lever is moved, resilient means to move said lever in one direction, and pattern controlled means to move said lever in an opposite direction.

6. A yarn change binder, comprisin in combination with the yarn fingers and t eir actuating means, of a hook pivotally mounted at its rear end and provided with means to overhang said fingers, a lever having its free endbifurcated, a knife movably carried in said bifurcated end, contributing therewith to' form a cutter and a binder and provided with a slot, a pin adjustably mounted and extending into said slot to cause the proper movement of said knife during the movement of said lever, resilient means to move said lever in one direction, and pattern controlled means to efiect the movement of said lever in a reverse direction.

7. A yarn change binder. comprising in combination with the yarn fingers and their actuating means, of a hook adapted to be raised by one or the other of said yarn fingers, a lever, a knife co -operating therewith to form yarn binding and yarn severing mechanisms, resilient means to move said lever in one direction, pattern controlled means to move said lever in a reverse direction, and manually actuated means to lock said lever in an inoperative position.

FRANK W. ROBINSON. Witnesses:

C. D. MoVAY. F. A. NEWTON.

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