US770942A

US770942A - Knitting-machine.

Info

Publication number: US770942A
Application number: US19574904A
Authority: US
Inventors: Daniel F Sullivan
Original assignee: LAWRENCE Manufacturing CO
Current assignee: LAWRENCE Manufacturing CO
Priority date: 1904-02-29
Filing date: 1904-02-29
Publication date: 1904-09-27
Anticipated expiration: 1921-09-27

Description

PATENTED SEPT. 27, 1904.

D. F. SULLIVAN. KNITTING MACHINE.

APPLIUATION FILED FEB. 29, 1904..

2 SHEETS-SHEET Z.

NO MODEL.

l/l//TNESSES No. 770,942. Patented September 27, 1904.

UNITED STATES PATENT OEEICE.

DANIEL F. SULLIVAN, OF LOWELL, MASSACHUSETTS, ASSIGN OR TO LATV- RENCE MANUFACTURING COMPANY, OF LOWELL, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

KNlTTlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 770,942, dated September 27, 1904. Application iiled February 29, 1904. Serial No. 195,749, (No model.)

T all wwm t 77ml/ @0W/@WW upon the forward ends of the cam-levers 15,

Be it known that I, DANIEL F. SULLIVAN, a pivotally mounted at 16 on the frame 12 of the citizen oftheUnited States,residingatLowell, attachment. The rearwardly-extended arms in the county of Middlesex and State of Masof the cam-levers 15 are provided with por- 5 sachusetts, have invented certain new and usetions -adapted to be engaged by pins upon patful Improvements in Knitting-Machines; and tern-wheels 17, actuated through the medium I do hereby declare the following to be a full, of the pawl 18. carried by the reciprocating clear, and exact description of the invention, slide-bar 19, which is mounted in suitable such as will enable others skilled in the art to bearings in the frame of the device and which I0 which it appertains to make and use the same. carries upon its forward end a cam-roll 20,

The presentinvention relates to an improveengaging the cam 21, secured to the needlement in knitting-machines, and more particucylinder 1. larly to striping attachments for circular The tube-carrying levers 5 and 8 are pro- 60 barbed or spring needle knitting-machines. vided with rearwardly-extended arms 22 and f I5 The object of the present invention is to 23, respectively, which are provided with reorganize and improve the striping attachcurved slots 24 and 25, engaging a fixed pin 27, ment for knitting-machines, illustrated and deby virtue of which the ends of the yarn-tubes scribed in my Patent No. 703,973, patented in passing from their operative to their inop- July 1, 1902. erative positions follow a path of motion 2O In the accompanying drawings, illustrating which is indicated in dotted lines in Fig. 1, the preferred form of the invention, Figure 1 extending from the operative position, in is a side elevation of the attachment. Fig. 2 which the end of the yarn-tube 3 is shown, to is a front elevation of the thread holding and the inoperative position, in which the end of cutting devices. Fig. 3 is a section on line the yarn-tube4is shown. It will be observed 25 3 3, Fig. 2. Fig. 4 is a section on line 4 4, that the forward end of this path of motion is Fig. 2, and Fig. 5 is a plan of theoperatingcurved sharply, so that the end of the yarncarn. tube 4 in its inoperative position is located The needle-cylinderl is mounted in the usual within the circle of the needles, but only manner on the bed-plate of the knitting-maslightly thereabove. The curving of the slots 30 chine and carries the usual barbed or spring 24 and 25 secures this path of motion for the needles 2. The yarn is guided to the needles ends of the yarn-tubes, and it is considered by yarn-tubes 3 and 4, of which the yarnthat this feature of the present construction tube 3 is shown in the position which it occuconduces to the certainty and reliability of the 8O pies when delivering thread to the looperoperation of the attachment.

3 5 wheel to be knit into the fabric. The yarn The thread cutting and holding devices are tube 3 is carried by a tube-carrying lever 5, in their general construction and mode of oppivoted at 6 u'pon the intermediate lever 7. eration similar to the corresponding devices The yarn-tube 4 is carried in similar manner of the said patent. Certain improvements, 85 by the lever 8, pivotally supported at 9 upon however, have been embodied in the construc- 40 the intermediate lever 10. The two levers 7 tion, which are described as follows: The staand 10 are pivotally mounted upon the stud tionary blade 29` of the thread-cutting device 11, secured to a portion of the frame 12 of the is projected downward within and close to the attachment, which in turn is mounted upon circle of the needles and upon its upper end the bed-plate of the machine. The rearwardlyis provided with a laterally-projected arm 30,

45 extended arms 13 of the intermediate levers which afords a support for the independent 7 and 10 are provided with adjusting-screws downwardly-projected guide-plate 31, which 14, the lower ends of which are adapted to bear is secured to said arm by means of screws 32.

The plate 31 is slotted at 33 to reccive the screws 32, so as to permit the vertical adjustment of the said plate 31 to present itin proper relative position to the thread-guide 40 on the outside of the needles and its removal for convenience in sharpening the stationary knifeblade 29. The guide-plate 31 is provided upon its forward edge with an apron or flange 34, which is extended inwardly7 down along' the forward edge of the guide-plate 31 and along the adjacent portion of the bottom edge of the said guide-plate 31. The margin of this apron or iiange constitutes, in effect, a supplementary yarn-guidelocated behind the gu ide-plate 31 and in operation independent therefrom, though secured thereto for convenience in construction. The supplementary yarn-guide contributes to the certainty of operation of the machine, particularly when the yarn-tube is thrown into operation. The yarn extending from the holder to the delivery end of the yarn-tube is bent over the edge of the iiange 34 when the yarn-tube is thrown into operation, and the yarn extends in a straight line from a point within to a point without the circle of the needles, thereby insuring the correct presentation of the yarn to the needles when it is thrown into operation. This feature of the invention has been adopted owing to the difficulty which has sometimes been experienced with the construction of the said patent,

arising from the fact that the yarn when thrown into operation was bent sharply along the tops of the needles, with the result that it sometimes caught there and ran in over the yarn-guide and failed to be knitted into the fabric. This feature of the invention also contributes in a minor degree to the certainty of operation of the device when the yarn is thrown out of operation, as it tends to prevent the yarn from running between the movable blade 35 and inside guide-plate 31 and consequent failure of being cut. The movable knife-blade 35 and the holder 36 are constructed and operated substantially as in the construction of the said patent, except that the shank of the holder` 36 is provided with a cam-surface 37, which is engaged by the back edge of the knife-blade when it is retracted to open the holder. The means for operating the movable knife-blade 35 are somewhat different from the construction of the said patent, consisting of the cam-lever 38, which is employed to open the knife-blade, and a spring 39, which is employed to close the same.

The yarn-guide 40,adjustably mounted upon the frame 12 of the machine has its forward end adapted to engage the barbs of the needles and carries a guide-wire 41,which, to.- gether with the guide proper, 40, guides the yarn to the looper-wheel 42.

The cam 21, above referred to, which operates the various parts of the device through the medium of the pattern-wheel 17, is constructed with three rises, so that suiiicient time is provided for the successive movements of the parts and their proper coperation with the thread. i The first rise 43 operates to move the slide-bar 19 rearwardly, so as to turn the pattern-wheel17 sufficiently to operate one of the levers 15 to cause the inoperative yarn-guide to be thrown from in-. The' dwellY operative to' operative position. succeeding this rise 43 affords time for the yarn just previously thrown into operation to be knit into the fabric along with the other yarn, so as to make the lap. Then the second rise 44 operates to rotate the patternwheel 17, so as to cause the other cam-lever 15 to be moved, so as to throw the other yarntube into inoperative position and simultaneously` to move the movable knife-blade to open position, thereby separating the knifeblades to receive the yarn just thrown out of operation. The dwell succeeding the rise l44 affords time for the passage of the yarn thrown out of operation under the guideplate 31 and into the opening between the two knife-blades. Then the third rise 45 operates to turn the pattern-wheel 17 still farther, so as to release the cam-lever 38 to permit its spring 39 to cause the movable blade to cut oif the yarn thrown out of operation.

The adjustable part 28, carrying the pin 27, is provided with a slot in its shank, so that the pin 27 may be moved vertically and horizontally to vary the path of motion of the yarn-tubes to suit the exigencies of any given case, to cause them to move in the proper path from their operative to their inoperative and from their inoperative to their operative positions, thereby affording' a means for independently changing the path of motion and the operative and inoperative position of the delivery ends of the yarn-guides.

The adjusting-screws 14 serve as means for adjusting the positions of the levers 7 and 10, thereby cooperating with the pin 27 in changing the path of motion of the yarn-tubes.

Having thus described the invention, what is claimed is- 1. A circular spring-needle knitting-machine, having, in combination, aneedle-cylinder, knitting-wheels, a plurality of movable yarn-guides, and means for moving them includinga yarn-guide-carrying lever provided with a curved slot, and a stationary pin for engaging said slot, substantially as described.

2. A circular spring-needle knitting-machine, having, in combination, a needle-cylinder, knitting-wheels, needles carried thereby, a guide-plate located within and close to the circle of the needles, a supplementary yarnguide located inside of the guide-plate, and yarn-changing devices, substantially as described.

3. A circular spring-needle knitting-machine, having, in combination, a needle-cylinder, knitting-wheels, a guide-plate located within and close to the needles provided with IOO 5. A circular spring-needle knitting-mw' chine, having, in combination, a needle-cylinder, knltting-wheels, yarn-changing devices,

a yarn-cutter, a yarn-holder, and means for successively operating the parts to move an inoperative yarn-guide from inoperative position into operative position, then simultaneously to open the yarn-cutter and to throw the other operative yarn-guide -from operative to inoperative position and thereafter to cause the cutter to make its cutting stroke, substantially as described.

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

DANIEL F. SULLIVAN.

Witnesses:

HORACE VAN EVEREN, FARNUM F. DoRsEY.