US1712660A - Reversing drive mechanism for textile-pattern chains - Google Patents

Description

May 14, 1929. FR|EDMANN 1,712,660

REVERSING DRIVE MECHANISM FOR TEXTILE PATTERN CHAINS Filed Jan. 19, 1925 2 Sheets-Sheet INVENTOR.

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REVERSING DRIVE MECHANISM FOR TEXTILE PATTERN CHAINS Filed Jan. 19, 1925 2 Sheets-Sheet 2 I Q B o 0 0000000009 A/rz rn'edma INVENTORF ATTORNEYS.

names ill/lay it, terauNi Eo STATES with PATENT OFFICE.

ALBERT FRIEDMANN, 0F WYOMISSING, PENNSYLVANIA, ASSIGNOB TO TEXTILE MA- CHINE WORKS, 0F WYOMISSING, PENNSYLVANIA, A CORYORATION OF PENNSYL- vama REVERSING D RIVE MECEIAITISJIII FOR TEXTILEPATTERN CHAINS.

Application filed January My invention relates to pattern chain mechanism employed particularly in connection with textile'machines for determinedly controlling the operative movements thereof; and more particularly it relates toan 1mproved chain drive mechanism provid ng for chain-determined reversing movements of the direction of the drive to permit desired repeat action of a portion or portions of the chain length. The invention is more fully 'set forth and described in connection with v ing, is driven by said drum 3 around which it v the accompanying drawings and the novel features particularly pointed out in the subjoined claims.

Fig. 1 shows in side elevation a prefererd embodiment of my invention, the chain being shown only in dotted outline.

' 1F ig. 2 is a corresponding plan view, partly in section on the line 2'2 of Fig. 1.

.l ig. 3 is a partial end View, looking n the direction of arrow 3 of Fig. 1, show ng a part of the pattern chain and its driving drum. I

Fig. i indicates a portion of a stocking fabric having lace clock designs automatically produced on a full fashioned knltting ma chine, the operative control of the machine by a pattern chain having my improved drive, producing the same in a simplified manner and at a great saving in. the length of such chain heretofore required. v 7

ln the drawings 1 have indicated only my improved reversible chain driving mechanism, its application to and cooperation with an automatic machine being well understood and requirin no further explanation; the preferred em odiment shown being particu larly adapted for'use with a full fashioned knitting machine to control the movements of the lace points-in the production of open work or lace'stockings suc as indicated in Fig. 4. Referring more particularly to the drawings, 1 represents the base, and 2, 2 spaced vertical side members of a frame adapted for my improved'mechanism; said frame being suitably secured in cooperative relation with the machine and carrying a drive drum 3 freely rotatable on'shaft 4 supported in side members 2, 2. The chain 5, which may be of any usual type, and, commonly comprises a series of connectedlinkbars provided with studs or buttons of suitable height and spacis carried with its extended length supported 19,, 1925. Seriallh. 3,340.

to move the chain back and forth over a given I len th thereof, as determined by the chain itse f, so that such chain portion may re eatedly act; and such repeat action of a c ain portion, as readily understood, permits cutting out long chain sections heretofore required to perform thesame operations.

To provide for such reversing movements of. the driving drum 3, in the construction illustrated, I orm the latter with two fixed ratchet-wheels 6 and 7 the teeth of which are set in opposite directions, as shown, and racked by their respective pawls 8 and 9, carried on end studs 10 and 11- of their respective carrying levers 12 and13. Said levers 12 and 13 extend in opposite directions from a common pivot support on the projected end of drum shaft 4 and have regular periodic oscillating movements imparted to them through the medium of push rodslt and 15, preferably acting in unison and operated from the machine drive mechanism,-in the present case'by a cam or cams on the main cam shaft. Pawl 8, as shown, has an extension 8?, and is held in racking or non-racking position on its stud l0by a spring detent 16 engaging ;in one or other of the notches of an. arm 17 fixed to said stud 10; and pawl 9 is similarly held through its extension 9* and its spring detent 18 engaging in one of th notches of arm 19 fixed to its stud 11.

It is obvious that only one pawl at a time may be in racking engagement with its of such length that it will be shifted by contact of a pawl movingitooperative or racking position so as to lift t e other pawl to inoperative or non-racking position in advance ofany racking action of the engagingly moving pawl.

Pawls 8 and 9, in the constructionshown, are selectively moved to racking position thro h the medium of chain studs or buttons engaging and holding in pawl setting position one or other of two pawl setting levers or 26 which have a common pivot support on shaft 27 and to which periodic oscillating swings are imparted by a plunger bar 28; the latter being periodically operated by the ma chine drive mechanism in a manner similar to the operation of the push rods 14 and 15, but acting somewhat in advance of the latter. Levers 25 and 26, as shown, are jointly lifted with each rising movement of said plunger bar 28 and fall with the latter, except when one of them is held in lifted pawl setting position by engagement of its opposite end 30 with a stud or button on the pattern chain.

When lever 25 is thus temporarily held in raised pawl setting position by a link stud, as

indicated by. dotted lines in Fig. 1, the succeeding downward action of push rod 14 lowers pawl carrying lever 12 which causes pawl end 8 to contact with said stud set lever 25 and turn its pawl 8 on its stud 10 into racking position for action on its ratchet wheel 6; and

' spring detent 16-shifted a notch by such pawl 'ries ind'epen ently pivoted thereon a bell crank 31, one arm of which lies in the plane of pawl setting lever 26 and its other arm connected by a link 32 to a swinging lever 33 freely carried by pivot pin 34, with its free end having a limited movement between adjustable stops as shown, and normally held in retracted position against one of said stops 38 by a spring 37 Swinging lever 33 also carries a counting device, in the form of a disc 35 as shown and later herein more fully described, and a swinging stop 40 which rides on the peripher of said discand directly contacts with paw end 9 of pawl 9, when said lever 33 is swung away from its stop 38.

chain stud, the succeeding downward swingarm of bell crank 31 tocontact with said chain I When pawl setting'lever 26 is held in raised pawl setting position by a properly positioned of pawl carrying lever 12 will cause the one set lever to swing said bell crank on its pivot stud 10, and suchswinging bell crank, through the medium of link 32, swinging lever 33, counting disc 35, and swinging stop 40, will move pawl 9 to racking position on its stud 11 through its pawl extension 9. .-"Such ensagi awl 8 rough actidn of pawl shifted ar '20, and W111 also shift pawl detent 18 to another notch to hold said awl in such rack- 'tion for action on 1ts ratchet wheel 7 solt atsucceeding swinging movements of nglmovement of pawl '9 will disengage, t sli e pawl carrying lever 13 as actuated push rod 15 will reversely drive drum 3.

. The counting disc 35 above referred to as carried by swinging lever 33, has a concentric ratchet toothed drive gear, and is periodically racked, as by a pawl 39 fixedly ivoted to said frame member 2, each time Said SWingin lever 33 is oscillated by bell crank 31 and retractive spring 37 And the periphery of said disc 35 is provided with one or more notches 41, as required by the pattern, into which notch the toothed end of swinging stop 40 will fall as said disc turns, and when in this position it is out of contact with pawl end 9 and the succeeding swinging movement of lever 33 will fail to shift pawl 9, leaving the chain drum under the continued action of pawl 8, thus providing at times for rendering ineffective the action of one chain stud so as to pass the "same and continue with other chain portions.

As before stated, the upward stroke of plunger 28 is somewhat in advance of the upward strokes of push rods 14 and 15, which action swings the ends 30 of levers 25 and 26 away from the chain during racking movement of the latter; and clearance is also provided between the raised pawl setting levers 25 and 26, and pawl end 8 and contact arm of hell crank 31, so that no shifting movement of the latter is effected by the upward stroke of plunger 28 lifting said levers 25 and 26, but only during the delayed downward stroke of push rods 14 and 15 carrying lever carried pawl end 8 and bell crank arm 31 into contact with one or other of said pawl setting levers 25 or 26 as selectively heldin set raised position by a chain stud.

In the particular showing of the drawings, other levers, 50, 51, 52 and 53 are shown as pivotally carried on pivot shaft 27 and lifted and lowered by plunger bar 28, except as their rearwardly exten ing ends are engaged by chain studs, indicated at 55, 56, 57 58 and 59, to hold them in adjusted raised position to control the movement of lace point shifting rod 71. Other studs 60 and 61 indicated effect only levers 25 and 26 to control the drive motions of the chain in the manner above fully set forth.

The action of my improved chain drive mechanism above fully set forth, will be described in connection with the lace clock pattern shown in Fig, 4, as-the preferred embodiment illustrated is particularly applicable for this urpose.

' en the knittin machine reaches the course indicated by the line VV, the pattern chain is set in motion, as by automatic shiftingof the main cam shaft to bring cams thereon into operation to actuate push rods 14 and 15 and plunger bar 28. The direction of movement of said chain, which preferably will'be in a forward direction and may be controlled as by a forward chain stud con- I studs 55 to 59 on the five chain links 65 ill shown in Fig. 3. As the racked drum brings into action thefirst of these five links, a forward stud 60 on the latter attempts to influence the direction of the chain movement by engaging and holding in set position pawl setting lever 25, but as this pawl is then in racking position, no change in the till till

chain motion is eilected .until stud 61 on the fifth link is brought into action to hold pawl setting lever 26 in raised set position, when pawl 9 is moved to racking position and previously acting pawl 8 moved to nonracking position in the manner hereinbefore fully set forth. Pawl 9 will now reverse the motion of. the chain for five links until forward stud again changes it by raising pawl setting lever 25 to shift pawl 8 into racking position and pawl 9 to nonracking position. Such forward and backward movement of these five links will continue throughout the productions of the design between the lines X-X and XX, taking the place of the number of links heretofore required,equal to the number of times each of these five linksis in action. When "the line X"-X is reached, counting disc 35, which has been racked at each reversing action of pawl setting lever 26, presents a notch 41 to swinging stop 40, so as to render ineifective the next reversin action of stud ii]. in the manner clearlyset forth heretofore, so that pawl 8 which continues to act will move the chain past the fifth link and bring into play the succeedinglink or links controlling the pattern beyond said line X -X Such succeeding pattern may require individual links or may again be producable by a series of links moved back and forth as above and as determined by other chain studs (not shown) in line with 60 and 61.

The saving of chain length, in the particular employment above set -,forth, may be as high as eighty per. centum, ";greatly reducing the cost and time of setting up, and radically simplifying the handling thereof, the unwieldly lengths heretofore required necessitating special supporting means to carry the same in freely running untangled position.

While the particular embodiment above set forth and shown is peculiarly applicable to controlling the lace points of full fashioned knitting machine, it will be readily seen, that its simple, compact and readily applied construction, will make it equally applicable to other controls of the same machine or radically difierent machines. And the particular embodiment specifically set forth may of course be modified within the scope of the invention as defined in the claims.

What I claim is g 1. A pattern chain reversing drive mechanism comprising a pattern chain, a driving drum therefor, reversely acting driving mechanisms for the latter, a member on said chain adapted to effect drivingmovement in one direction, a second member on said chain adapted to efiect driving movement in a reverse direction, and a counting device controlled by one of said members and adapted to periodically prevent a change in the direction of movement of said drum.

2. A pattern chain reversing drive'mechanism comprising a pattern chain, a driving drum therefor, reversely acting driving mechanisms for the latter, a member on one link of said chain adapted to operate one driving mechanism, a second memberon another link of said chain adapted to operate the reverse driving mechanism, and a counting device controlled by one of said mechanisms and adapted to periodically render ineffective the action of one of said'members.

3. A pattern chain reversing drive mechanism comprising a pattern chain, a driving drum therefor, reversely racking pawl mechanisms for the latter, amember on said chain adapted to operatively position one pawl, a

second member on said chain adapted to ope chain adapted to operativ'ely position theother pawl,a;nd a counting device, controlled by one of said members, associated with one of said pawl mechanisms and operated at each operation of the latter, and means controlled by said counting mechanism to periodically avoid the operative positioning of a pawl.

5. ,A pattern chain reversing drive mechanism comprising a patern chain, a driving drum therefor, reversely racking pawlmechanisms for the latter, a chain link adapted to operatively position one pawl, a second chain link adapted to operatively position the other pawl, means operated by an engaging pawl to disengage the opposed pawl, a counting device associated with one pawl mechanism and operated at each pawl positioning of the latter, and means controlled by said counting device to periodically prevent such pawl positioning. 7

6. A pattern chain reversing drive mechaoperatively position one awl, a second chain link adapted to operative y position the other pawl, means operated by an engaging pawl to v the opposed pawl, a counting disc V I 'tion of the latter.

v of said lever.

having a driving ratchet associated with one pawl mechanism, means operative at each pawl positioning movement of the latter to rack said disc, and disc controlled means adapted to periodically avoid such pawl positioning.

7. A pattern chain reversing drive mechanism comprising a pattern chain, a driving drum therefor, reversely racking pawl mechanisms for the latter, a chain link adapted to operatively position one pawl, a second chain link adapted to operatively position the other pawl, means operated by an engaging pawl to disengage the opposed pawl, a pivoted lever carrying a ratchet driven counting disc having a notched periphery, racking means for said disc operative by the pawl positioning movement of one pawl mechanism, a pawl engaged stop riding on said disc periphery and periodically engaging in said notch to periodically prevent movement of its pawl to engaging position.

8. A pattern chain reversing drive .meehanism comprising a pattern drum, reversely racking pawls therefor, periodically swung pawl carrying levers, chain set periodically swung pawl positioning levers and a counting device actuated by one of said pawl-positioning levers and adapted to periodically render ineffective the pawl positioning ac- 9. A pattern chain reversing drive mechanism comprising a pattern drum, reversely racking pawls therefor, periodically swung pawl carrying levers, chain set periodically swung pawl positioning levers and a pivotally swung counting device operated by one of said pawl positioning levers and adapted to periodically render ineffective the pawl positioning action of the latter. I 10. A pattern'chain reversing drive mechanism comprising a pattern drum, reversely racking pawls therefor, periodically swung pawl carrying levers, chain set periodically swung pawl positioning levers and a pivotally swung lever oscillated by one of said pawl positioning levers and a counting disc on said lever rotated step-by-step at each lever oscillation, and adapted to periodically render inefiective a pawl positioning movement 11. A pattern chain reversing drive mechanism' comprisin a pattern drum, reversely racking pawls erefor, periodically'swung pawl carrying levers, chain set periodically ing levers extending in op swung pawl positioning levers and a ivotally swung lever oscillated by one of said pawl positioning levers, a counting disc on said lever having a notched periphery and a ratchet drive gear racked at each oscillation of said lever, and aswinging stop on the latter periodically engageable in said notched periphery to render ineffective the pawl p0sitioning movement of said lever.

12. In a pattern chain reversing drive mechanism comprising a chain drum and reversely racking pawls therefor, periodically swung pawl-carrying levers pivoted coaxially with said drum, periodicallv swung pawlactuating levers, chain carried means efl'ecting the active positions of said pawl actuating levers, and means actuated by an engaging pawl to disengage the opposed pawl.

13. In a pattern chain reversing drive mechanism comprising a chain drum and reversely racking pawls therefor, swinging pawl-carrying levers pivoted coaxiall with said drum and having means to be] their respective pawls in engaged or disengaged positions, chain carried means effecting the movements of either pawl to engaged position, and means actuated by the engaging pawl to disengage the opposed pawl.

M. In a pattern chain reversing drive mechanism a pattern chain, a driving drum therefor having rcversely toothed driving ratchet wheels, coaxially pivoted pawl carrying levers extending in opposite directions,

pawls carried by the latter and movable thereon to racking and non-racking position, pawl setting levers, means to periodically swing said pawl carrying levers and said pawl setting levers, chain carried means to selectively position either of said pawl setting levers and a slide bar operated by an engaging pawl to disengage the opposed pawl.

15. In I a pattern chain reversing drive mechanism a pattern chain, a driving drum therefor having reversely toothed driving ratchet wheels, coaxially pivoted pawl carry- 'te directions, pawls carried by the latter and movable thereon to racking and non-racking position, pawl setting levers, means to periodically swing said pawl carrying levers and said pawl setting levers, chain carried means to selectively 'tion either of said pawl setting levers, a bar operated by an engaging pawl to disengage the opposed pawl, a counting disc operated by one of said pawl setting levers, and means actuated by said counting disc to periodically render inefiective the pawl positioning action of one of said pawl setting levers.

In testimony whereof I afix my signature.

ALBERT FRIEDMANN.

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