US2604769A

US2604769A - Yarn feed assembly

Info

Publication number: US2604769A
Application number: US128693A
Authority: US
Inventors: Pierre Eugene St
Original assignee: Hemphill Co
Current assignee: Hemphill Co
Priority date: 1949-11-22
Filing date: 1949-11-22
Publication date: 1952-07-29
Anticipated expiration: 1969-07-29

Description

July 29, 1952 E. ST. PIERRE YARN FEED ASSEMBLY 2 SHEETS-SIIEET 1 Filed 'Nov. 22, 1949 Fla. 2.-

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July 29, 1952 E. ST. PIERRE YARN FEED ASSEMBLY 2 SHEETS-SHEET 2 Filed Nov. 22, 1949 Hill:

X/VVENJ'OR: E 45 5TB/E Patented July 29, 1952 YARN FEED ASSEMBLY Eugene St. Pierre, Pawtucket, R. I., assignor to Hemphill Company, Central Falls, R. I., a corporation of Massachusetts Application November 22, 1949, Serial No. 128,693

3 Claims. 1

This invention relates to a new and useful improvement in yarn feeding devices for circular, independent needle, knitting machines.

One form of the device is shown in the drawing, of which:

Fig. l is a plan view;

Fig. 2 is a side elevation;

Fig. 3 is an enlarged partial side elevation;

Fig. 4 is a front elevation corresponding in extent to Fig. 3.

Fig. 5 is a still further restricted partial side elevation illustrating a position assumed by the device; and

Fig. 6 is a similar front elevation.

As shown, the device consists of a body I suitably supported on the carrier ring of the machine which is slotted as at 2 which slot is partially closed by cover plates 3 and 4 so that a slide-way is formed within which a slide 5 can move vertically. Afiixed to slide 5 or an integral part thereof is yarn lever e. Projecting laterally from slide 5 is a stud l positioned so as to be engageable with an adjustable stop 8 whereby the downward limit of movement of yarn lever or yarn feeding finger 6 is determined. Slide 5 is also provided on its other side with another pin 9 to which is attached one end of a spring 10, the other end of which is held by a bracket I I so that yarn lever 5 is urged upwardly. Body I is also provided with a curved extension l2 which forms the support for a pivot screw I3 upon which is pivoted a member consisting of an upwardly extending arm l4 and a lateral extending arm 15. As best shown in Figs. 1, 4 and 6, arm M is bent so that its free end overlies the upper end of slide 5. This end of arm I4 is provided with an adjustable stop l6 overhanging the upper end of slide 5. Arm l5 overlies a lever l'i pivoted to a suitable bracket !8. Lever IT is provided with a slot l9 along which a pin 29 is able to move. Pin 29 is fixed in one end of another lever 2| pivoted to bracket it at 22 and pivotally connected at its other end 23 to a rod 24 which in turn is operatively connected to a pattern drum (not shown) provided with suitable operating cams. The unit consisting of arms i l and i5 is urged by spring 25 into the position shown in Fig. 2 in which stop It overlies the upper end of slide 5 as already explained.

The device above described operates as follows. If end 23 of lever 2| is lowered, the opposite end of lever I? will also be lowered with the result that yarn lever 6 is pushed down to its lowest position indicated by dotted lines in Fig. 4. At this position, pin 7 will rest upon stop 8. It is to be assumed that this position of yarn lever 6 is lower than the normal yarn feeding position and is to insure that the yarn is low enough to be properly taken by the needles.

If lever 24 is now raised sufficiently, yarn lever B will be raised to the full-line position shown in Fig. 4 at which it engages stop If). This may be assumed to be the normal yarn feeding position. This position may, of course, be varied by adjusting stop [6 so that the feeding position is independent of the exact position of lever l1,

When yarn lever B is to be moved out of yarn feeding position, rod 24 is raised still further with the result that the opposite end of lever I! is also raised. This in turn will raise arm l5 which will swing arm M out of its vertical position so that stop l6 will no longer overlie the upper end of slide 5 and slide '5 will be moved to its uppermost, inactive position by spring I!) or as shown in Figs. 5 and 6. A stop 26 (Fig. 2) limits the movement of levers 2| and I! to that required for this purpose since excessive movement of those levers might swing arm l5 so far that spring 25 would be unable to bring it back. To bring yarn lever 6 back into feeding position, end 23 of lever 2| is lowered which correspondingly lowers the opposite end of lever ll so that yarn lever B is carried to its lowermost position as already described. At the same time, arm [4 is swung back into its vertical position by spring 25 so that it is again in position to limit the upward movement of yarn lever 6 to its yarn feeding position.

It is always desirable that the cams on a pattern drum have a uniform maximum height so that they can be cut from standard cam rings. It sometimes happens that this standard height does not provide suflicient motion for the usual type of operating mechanism to move a device such as a yarn lever through the required distance as would be the case of the device described above. The device of this invention makes such moves possible without undue complication. Also, the device of this invention permits of accurate positioning of the yarn feed at its yarn feeding height irrespective of small amounts of lost motion in the operating mechanism.

I claim:

1. A yarn feed assembly for a circular, independent needle, knitting machine which includes a vertically slidable yarn feeding finger, means operatively associated with said finger for permitting it to move upwardly, a displaceable stop for limiting the upward movement of said finger, said means also constituting means for lowering said finger to a desired lower position and for displacing said stop so that when said stop is displaced said finger can move to a position higher than that permitted by said stop.

2. A yarn feed assembly according to claim 1 in which said means also serves as a stop tolimit the extreme upward movement of said finger.

3. A yarn feeding assembly for a circular, in-

dependent needle, knitting machine which in- 10 in said direction to permit said finger to move 15 further in said direction, and means for so moving said stop.

EUGENE ST. PIERRE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS