US909727A

US909727A - Thread-controlled stop-motion for circular-knitting machines.

Info

Publication number: US909727A
Application number: US44175108A
Authority: US
Inventors: Norman H Williams
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-07-03
Filing date: 1908-07-03
Publication date: 1909-01-12
Anticipated expiration: 1926-01-12

Description

.QLQW 4 N. H. WILLIAMS.

THREAD CONTROLLED STOP MOTION FOR CIRCULAR KNITTING MAGHINES.

I APPLIOATION FILED JULY 3, 1908.

909,727. Patented Jan. 12,1909.

2 SHEETS-SHEET l.

\A/ITNEEEEE TIE: NVKNTQ N. H. WILLIAMS. THREAD CONTROLLED STOP MOTION FOR CIRCULAR KNITTING MACHINES. APPLICATION FILED JULY 3, I908.

' 909,727. Patented Jan. 12, 1909.

2 SHEETS-SHEET 2.

WITNEEIEEE NORMAN H. WILLIAMS, OF PERRY, NEW YORK.

THREAD-CONTROLLEDSTOP-MOTION FOR CIRCULAR-KNITTING MACHINES.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed July 3, 1908. Serial No. 441,751.

To all whom it may concern:

Be it known that I, NORMAN H. WILLIAMS, a citizen of the United States, residing at Perry, county of Wyoming, and State of New York, have invented certain new and useful Improvements in Thread-Controlled Stop-Motions for Circular-Knitting Machines, of which the following is a specification.

The invention relates to such improvements and consists of the novel construction and combination of parts hereinafter de scribed and subsequently claimed.

Reference may be had to the accompanying drawings, and the reference characters marked thereon, which form a part of this specification. 7

Similar characters refer to similar parts in the several figures therein.

Figure 1 of the drawings is a view in perspective of a portion of a circular knitting machineshowing my improved stop-motion mechanism attached thereto. Fig. 2 is a view in side elevation of one of the threadsupported latch-operating fingers, and the support for the same. Fig. 3 is a top plan view of the same. Fig. 4 is a View in side elevation of the other thread-supported latch-operating finger, and the support for the same. Fig. 5 is a top plan view of the same. Fig. 6 is a view in front elevation of the trip for inducing the release of the beltshifting mechanism, the latch for support ing the trip, and the plate upon which both are mounted, adapted to be attached to the needle cylinder. Fig. 7 is an end view of the same. Fig. 8 is a top plan view of the arm adapted to be fixed upon the spindle of the main stop-motion device, whereby the same is adapted to be operated by the trip of my attachment when released. Fig. 9 is a side view of the same.

The principal object of my invention is to insure the stopping of a circular knitting machine upon the breaking of one of the feed threads. And more specifically the object is to induce, upon the breaking of one of the feed threads, operation of an automatically-operating belt-shifting mechanism, indirectly through the mechanism whereby such release is accomplished by 'means of a detector-finger engaging the knitted web.

Referring to the drawings wherein the in- V vent-ion is shown in preferred form, 1 represents the cylinder of an ordinary springneedle knitting machine, the needles of which are diagrammatically represented by the lines 2.

The Web of fabric is shown at 3, and the cloth-wheel at 4, the cloth-wheel being mounted upon a stand, 5, supported from or upon the bed, or ring, 6, by the link 7.

Mounted upon the stand 5 in the usual manner is the sinker-bur, 8, to, which the thread, or yarn, 9, is supplied from the stationary thread-guide, 1

In advance of the stationary thread-guide is a movable thread-guiding finger, 11, pivoted at 12, upon the supporting bracket 13, fixed upon the stand 5, and having in its inner end a thread-receiving eye, 14, the thread passing to the eye 14 from the fixed eye 15, located somewhat above the pivot of said finger. So long as the thread remains under tension, the inner end of the finger 11 will be supported thereby in a raised position, as shown by solid lines in Fig. 1. When, however, the tension on the thread is relieved, as by the breaking of the thread, said finger 11 will at once drop to the position indicated by dotted lines in said figure.

In advance of the stand 5 is another stand, 17, mounted upon the ring, or bed, 6, by means of the link 18, upon which stand is supported in the usual manner a bur-wheel, 19, which may be any known kind of thread feeding wheel; as for example, what is known as a backing-wheel for supplying to the needles a backing yarn, or thread, in the manufacture of plush knitted fabrics.

The thread, or yarn, is supplied to the wheel 19 directly from the stationary threadguide 20.

In advance of the stationary thread-guide, 21, is a movable thread-guiding finger, 22, pivoted at 23, upon the su porting bracket 24, fixed upon the stand 1 7 and having in its inner end a thread-receiving eye, 25, the thread passing to said eye from the fixed eye 47, which is so located that so long as the thread 20 remains under tension, the inner end of the finger 22 will be supported thereby in a raised position, as shown by solid lines in Fig. 1. When, however, the tension on said thread 20 is relieved, as by the breaking of the thread, said finger 22 will at once drop to the position indicated by dotted lines in said figure.

Mounted upon the periphery of the cylinder 1, by means of a supporting plate, or bracket, 26, is a trip, 27, pivotally mounted at 28, upon the bracket 26,'and adaptedto be supported in a horizontal position by the latch 29, pivoted at 30, upon said bracket 26, as shown in 1. Said trip and latch are adapted to be carried by the rotating cylinder past the several bur-wheels and threadguides above referred to; and the latch 29, when supportin the trip 27 in horizontal position, is so located that its upper end passes just below the plane of the movable thread-guides 11 and 22 when said threadguides are in their raised position, as when supported by the respective threads under tension. But when either of said threadguides 11 and 22 is permitted to drop to the osition i dicated by dotted lines in Fig. 1, it'will thereby be brought into the path of the upper end of said latch so that said latch cannot pass the dropped thread-guide without engaging the same and being moved from the position shown by dotted lines in Figs. 1 and '6 to that indicated by dotted lines in said figures, in which dotted position of the latch the trip 27 is released and permitted to drop to a vertical osition, as indicated by dotted lines in figures.

Any known mechanism may be rovided w ereby the t p 27, when droppe to ver tical position, can accomplish or induce operation of suitable belt-shifting mechanism whereby the machine can be stoppedl vAs a preferred means for accomplishing this result, I have shown the machine provided with a well known form of stop motion mechanism adapted to be operated by a detector finger which engages the body of the knitted web, and have provided means whereby this same stop-motion mechanism can be actuated by the trip 27, when the latter is in a vertical position.

The stop-motion mechanism referred to, comprises a vertical spindle, 32, rotatively mounted in the frame 33, which is supported upon the bed, or ring, 6, by the link'34.

F ixed upon the upper end of the spindle 32 is a detector arm, 35, having at its inner end a yielding detector finger, 36, adapted normally to rest upon the body of the web 3, and upon encountering any material defeet in said web, such as a prominent protuberance thereupon, or an aperture therein, to be carried along a short distance with said web, thereby rocking the spindle'32.

Fixed upon the lower end of the spindle 32 is a keeper, 37, for the lever 38, pivoted at 39, upon a stud, 40, projecting from the base of the frame 33, the lower end of said lever 38, so long as said lever is under the control of the keeper 37, being supported in the path of the post 41, mounted upon the movable arm 42, which forms part of the belt-shifting mechanism, and which is adapted, when released, to be automatically actuated by the times a coil-spring 43, in a direction to accomplish the shifting of the belt from the fixed to the idle pulley of the machine.

The belt-shifting mechanism and belt pulleys are omitted from the drawing, as their form is immaterial for the purposes of the present invention.

The rocking of thespindle 32, induced by the engagement of the detector finger 36, by a defective portion of the knitted web, serves to swing the keeper 37 out of the path of the lever 38, and thereby to release from the control of said lever 38 the movable member, 42, of the belt-shifting mechanism. To ada t this stop-motion device to be operated bytiie trip 27 of my improved attachment, upon the spindle 32 an arm, 4%, which nor mally projects into the path traversed by the trip 27, when in a vertical position. I am thus able, upon the breaking of any of the feed threads, to automatica induce operation of the belt-shifting mechanism through the stop-motion mechanism commonly employed upon these machines.

In the operation of the machine, should a thread break, the movable guide-finger for said thread will at once drop into the path of the latch 29 and operate said latch to release the trip 27 which is carried by the movement of the cylinder into engagement with the arm 44, serving to rock the spindle 32 in substantially the same manner as the same would be rocked by the engagement of the detector finger 36 with a defect in the Web.

The bracket 26 is provided with an off-set, 45, adapted to limit the movement of the trip 27.

It will, of course, be understood that my invention is intended forouse in a machine provided with the usual mechanisms for completing the formation of the loops or stitches, but I have shown in the drawin s, for convenience in illustration, only such evices as are directly associated with my invention.

What I claim as new and desire to secure by Letters Patent is 1. In a machine of the class described, and in combination, a movable member ofa beltshifting mechanism; the needle cylinder; a trip carried by said needle cylinder; a latch adapted to support said trip at certain movable thread-guiding finger adapted to be supportedby the thread out of the path of said latch, and, when released from the thread, to extend into'the path of said latch; a movable member located in the ath of said trip when released from the latch, and means whereby movement of said movable member induces the operation of the movable member of said belt-shifting mechanism.

2. In a machine of the class describexLand in combination, a movable member of a belttrip carried by said needle cylinder; a latch adapted to support said trip at certain times; a plurality of movable thread-guiding fingers, each adapted to be supported by the thread out of the path of said latch, and, when released from the thread, to extend into the path of said latch; a movable member located in the path of said trip when released from the latch, and means whereby movement of said movable member induces the operation of the movable member of said belt-shifting mechanism.

3. In a machine of the class described, and in combination, the needle cylinder; a spindle; a detector fixed upon said spindle and adapted to engage the knitted web; a movable member of a belt-shifting mechanism; means whereby a rocking movement of said finger adapted to be supported by the thread p out of the path of said latch, and when released from the thread, to extend into the path of said latch; and a rocker arm fixed upon said spindle and projecting into the path of said trip when released from said latch.

In testimony whereof, I have hereunto set my hand this 3rd day of June 1908.

NORMAN H. WILLIAMS. Witnesses:

ARTHUR C. S'roWELL, JAMES LANDER.