US1982346A

US1982346A - kreis

Info

Publication number: US1982346A
Authority: US
Publication date: 1934-11-27
Anticipated expiration: 1951-11-27

Description

Nov. 27, 1934.

J. D. KREIS 1,982,346

YARN PRINTING MACHINE Original Filed May 4, 1932 6 Sheets-Sheet l Zhwentor JOSEPH .D- KRE/S Os *M attorneys Nqv. 27, 1934. J. D. KREIS.

YARN PRINTING MACHINE Original Filed May 4, 1932 6 Sheets-Sheet 2 JOSEPH .D KPELS 6 Sheets-Sheet 3 Gttorneg'i J. D. KREIS YARN PRINTING MACHINE Original Filed May 4, 1932 Nov. 27, 1934.

Nov. 27, 1934. J. D. KREIS 1,982,346

YARN PRINTING MACHINE Original Filed May 4, 1932 6 Sheets- Sheet 4 42a Zhwentor 496? JOSEPH D.kEE/$ (Ittorncgs Nov. 27, 1934. V J. D. Km

. YARNPRINTING MACHINE Original Filed May 4, 1932 6 Sheets- Sheet 5 Nov. 27, 1934. J. D. KREIS YARN PRINTING MACHINE Original Filed May 4, 1952 6 Sheets-Sheet s JOSEPH D. KEE/S i Gttomegs Patented Nov. 27, 1934 7 1,982,346 YARN PRINTING MACHINE Joseph D. Krcis, Cleveland, Ohio, assignor to The Erie Dyeing & Processing 00., Cleveland, hio,

a corporation .of Ohio Application May 4, 1932, Serial No. 809,162 Renewed October 4, 1934 20 Claims. (oi. 101-472) This invention relates to machines for printing yarn, and similar textile fibers incident to weav ing or knitting the latter into fabrics of the character in which the appearance of tweed is simulated or in a fabric having a predominating color mottled with an irregularly appearing tracer thread or mark as exemplified in Figure 20 of the drawings herein.

Those skilled in the textile industry are familiar with the fact that such eifectsmay be obtained by employing a yarn or thread having irregularly-spaced applications of color dye extending throughout the length thereof. It is essential I that these dyed portions be irregularly spaced, otherwise, certain of the dyed areas will become massed when the yarn or thread is knitted or woven and the resultant fabric will attain an undesirable and uncontrollable shade or pattern which may vary in tone design or texture, as for instance certain areas may be mottled, others may attain a figure, stripe or pattern while still others may differ substantially in color and give an odd or unsightly appearance to the fabric.

Heretofore, as far as I am aware, the only method for the irregular printing of yarn or thread for these fabrics which has been found practical in the textile industry has been to employ manual or hand labor, the attendants stamping or printing the textile fibers in a hap- 301 hazard manner to produce the desired irregularly spaced dyed marks. "Such practice is not only expensive but, as will be obvious, results in regular spacing of the dyed portions at periods, since it is impossible for a laborer to properly gauge or time the stamping or printing operation without slowing down the work to a point where the product would be prohibitively expensive.

The primary object of the present invention, therefore, is to provide a highly efficient, practical machine which will print or dye irregularlyspaced marks of variable length upon the yarn or thread consistently day in and day out,the machine being capable of producing many and varied irregularly-spaced portions or spots along the length of the yarn or thread, which latter may be subsequently knit, woven or otherwise made up into fabrics having an attractive mottled appearance.

The foregoing and other objects and advantages will be rendered apparent in view of the following description taken in conjunction with the drawings, wherein:---

Figures 1 and 2 are, respectively, views in plan and side elevation of a yarn or thread--printing 1-555 machine embodying the features of the invention in preferred form, certain parts of Fig. 2 being removed to show the frame construction;

Figs. 3 and 4 are sectional views taken substantially on the planes indicated by the lines 8 3-3 and 4-4, Fig. 2;

Fig. 5 is an end elevation of the parts shown in Fig. 6;: v l J V i Fig. 6 is an enlarged detail fragmentary sectional view taken substantially on a plane indica-ted by the line 6-6, Fig. 2; r

Fig. 7 is a View similar to Fig. 6, showing in further detail the parts illustrated in Fig. 4;

Figs. 8 p018, inclusive, are enlarged detail views of certainparts of the machine which are more or less intimately concerned with the features of the invention; v Fig. 19 is an enlarged sectional view taken on the line 19- 19, Fig. 4; and g Fig. 20 is illustrative of one of the types of fabric that may be produced by yarn or thread printed by the machine embodying the present invention. Referring in detail to the drawings, and first generally to Figs. 1, 2 and 3, the machine in its entirety comprises a plurality of printing units which are supported in series on channel base members 5, the units being inner-geared for synchronous operation. Since these units are substantially identical, a description of one will sufiice for all. Each unit embodies a dye-feeding roll A, an absorbent or pad roll B, and a printing roll C, which are provided with shafts or spindles 6. '7 and 8 journaled in suitable bearings borne by the frame of the machine. The upper and lower rolls C and A are mounted in

adjustable hanger brackets

9 and 10 carried by side frame stanchions 12 and a transversely disposed spacer frame member 13, and the roll B is carried directly by the said frame members 12. The rolls of eachunit are driven by means of

gears

14, 15 and 16 affixed upon the outer ends of the spindles 6, 7 and 8, respectively. The machine units (four in the present instance) are inter-geared by means of idler gears 17, each of which is mounted on a shaft having bearing in one of the stanchions 12. The hanger brackets 9 which carry the rolls A are supported at one extremity thereof by the stanchions l2 and at their opposite ends through the medium of links 18 which are screw threaded and supported at its opposite extremities upon pivotally mounted rods 20 which are provided with screw threaded ends having hand wheels 21 thereon to regulate the tension upon the springs 22. The roll A is partly submerged in fluid dye compound carried by a reservoir or dye pan 23, which is mounted on brackets movably supported by the side frame members 9. These brackets are provided with racks 24 adapted to mesh with gears 25 mounted upon a cross shaft 25. A hand wheel 27 is afilxed to the one end of the shaft 26 to facilitate adjustment of the pan relative to the roll A. The dye or coloring material may be supplied to the pans by means of a funnel 28 which is associated wth a pipe line or conduit 29.

The yarn or thread, indicated at Y, is fed into the machine over a suitable guide 30 and passes downwardly and around a tension roll 31, doubles back over a second tension roll 32 and then be tween the rolls B and C of the first printing unit.)

The roll 31 is carried by a pivotally mounted hanger bracket 31a which is adiustab y supported at one extrem ty thereof by rods 31?) having threaded end portions upon which hand wheels 2 0 a e moun ed. Mounted at the outgoing end of the machine is a reel which is carried upon o vo ally mounted brackets 34, provided with an adiust ng screw 35.

The present invention is primarily concerned with the printing roll C. its appurtenances and cooperating parts whereby the desired irregular n n+in z of the yarn or thread is obtained. and the fo lowing d scr t on confined and directed more or less in detail to this organization.

The roll C is preferably made up of an assembly com rising the shaft 8. (Figures 4 and 19) shown formed with a p u ality of annular c earance grooves 36c and longitud nally extendin keyways 36b and 360: a lurality of longitud nally reciprocab e cam members or bars 27. each having a plurality of cam faces or teeth 37c. formed on the outer surface thereof: a like number of sim larly shaped radally-recinrocahe cam bars 38 having cams or cam teeth 28!]. adapted to coact w h the teeth 37: a plurality of read ly removable and re aceable pr nt ng plates or rails 9 secured on the outer aces of the bars 33; and comb ned cam-bar u de and re

ainer'members

40 and 400.. wh ch are plined on the opposite ends of the shaft 36 and e ain the foregoing m mbers n op rat ve ass led relation.

One of the membe s 40. 4012 is shown in detail in Figs. 10 and 11. The inner face of each member is formed w th a plurality of rad al cam-bar guide grooves 401), and the circumferential portion of the face of sa d member with grooves 46c bounded by lugs 40d. The central portion of the member 40 is provided with. a plurality of gu de bores 40c for a purpose to be described.

There is a groove or track 401) for each set of cam bars 37, 38 so that when the

end members

40, 40a are mounted upon the shaft 36, these bars will register with. the grooves, each of the outer bars 38 reciprocating radially in its respective guideway or groove.

The bars 33 are normally urged radially inward- 1y by means of the spring assembly shown in Fig. '7. Each bar 38 is recessed at its opposite ends to receive a shoe forming part of a spring housing assembly comprising telescoping cylinders or blocks 41 and 41a, a spring 41b, and a pin 41c. As shown, a separate assembly is provided for each bar 38 in both the

end members

40 and 40a, but it will be obvious that this is a matter of design and may be varied as found expedient.

By referring to Fig. 19, it will be noted that there are twenty-four cam bars and a like number of printing bars in the example shown.

The printing bar actuating mechanism is governed primarily by hunting gear mechanism including one or more cam plates or

hunting gear members

42 and 42a, note Figs. 14 and 15, which are formed with teeth 42b and 420 to effeet, in conjunction withan internally toothed gear unit, an intermittent movement of the parts co-ordinated therewith. In the example shown, there are twenty-seven teeth in the gear 42 and twenLy-five in gear 42a. One or a set of these cams or gears are mounted for free rotation on bearings 44 carried by'one extremity of a fixed shaft 43, which extends across the machine and is supported at each side by the brackets 10 and frame member 13. These

hunting gear members

42 and 42a transmit motion to a plurality of radially movable plungers 45, one of which is shown in detail in Fig. 8. These plungers are mounted in grooves or guideways in a spider gear 46, which is formed on its inner face with a plurality of radial grooves 46a. bounded by teeth 461), note Figs. 16 and 1'7. The gear 46 rotates about a stationary retainer plate 47, which is fixed on the end of shaft 43 by means of a nut 48. The gear 46 and plungers 45 are held in operative assembled relation by means of an inner retainer plate 49 which is fixed to the gear 46 by bolts 53 and is mounted on hearing 51 on the end of the shaft 43, said plate being formed with an annular flange49a adapted to engage stop shoulders 45a formed on the plungers 45. The hunting gears 42, 42a, are mounted intermediate the revolving retainer member 49 and the stationary 1 end retainer plate 47. As shown herein, there are an even number (26) of radial grooves 460. in the gear 46 and consequently an even number of plungers 45, and there are an odd number of teeth in the hunting gears 42, 42a. These 00- 1 acting teeth and plunger units should respectively be either odd or even, that is, if there are an odd number of teeth there should be an even number of units, or vice versa, for a purpose which will soon become apparent. 1

The gear 46 is in constant mesh with a gear 52 (shown in detail in Figs. 12 and 13), which is formed with a plurality of solts 52a and adjustably secured to the printing roll gear 16 by means of bolts 53. The inner face of the gear 1 52 is radially grooved as at 52b at its periphery, forming a plurality of brackets 520. A coacting retainer plate 54 (see Fig. 13a) is provided as part of the assembly and is formed on its face with a plurality of radially extending concave 1 grooves 54a and a series of holes 54?) circumambient its axis and adapted to register with the bores 46c in the member 40. A plurality of dogs or levers 55, (one for each printing bar, or twenty-four) are pivotally mounted on a ring 55, which is supported in grooves 57 formed in the brackets 520, said grooves providing a complete annular groove for said ring. The gear 52 is formed with bolt holes 57a and the retainer plate 54 is secured against the inner face of the 1 said gear, with the concave grooves 54a in aligned registration with the grooves 52b. the body portion adjacent the groove thereby effecting a closure of the grooves .57. The dogs or levers 55 are thus pivotally suspended and permeans The dogs 55 transmit rectilinear motion-tothe cam bars 37 by means of plungers 58, which are: mounted forfree sliding movement inthe aligned bores- 40e and holes 54b formed in the members- 40' and 54, note particularly Fig. 6.

The entire printing-har-actuating mechanism above described is shown herein mounted atthe right-hand side of the machine and is protected by a housing or guard 59, see Fig. 2. The cambars 37 are actuated in reverse reciprocation by plungers 60 disposed at the left-hand end of each printing roll C, note Fig. 4. These plungers are mounted to slide in bores formed in the" end retainer member 40a and are progressively en gaged by a cam 61 formed on a cam plate 62', see also Fig. 18, which is held stationary with respect to the roll. Cam 61 continually returns any of the bars 37 that may have been actuated during rotation of theprinting roll to a retralcted position, and consequently retract the dogs or levers 55 back against the plungers 45. V

The operation of the machine is substantially as follows:

The'yarn or thread Y upon being fed in from 5 the left-hand end of the machine passes between the dye roll B and the printing roll C of each unit. Dye roll B is provided with a felt or like absorbent covering 1) which is continually fed with dye by the feed roll A, and the printing bars 39 are adapted to press the yarn against this felt upon being actuated radially by cam bars 37 and 38.

As the gear 45 rotates, the plungers 45 engage the teeth of the

hunting gear members

42, 42a, Certain of these teeth are shallow, as at 420. These may be considered as printing teeth, since when a plunger 45 engages therein, the plunger is moved radially and in turn actuates one of the dogs 55. plunger 58, cam bars 37 and38", thus driving a printing rail 39 outwardly, so that upon further rotation of the roll C, said rail will bear against the roll B.

As the gear 46 rotates, the plungers 45 gravitate between the teeth of the hunting gear-

memhers

42, 42a, or in other words, have a floating engagement with said teeth except when the plungers strike the dogs thus permitting relative angular movement between the said hunting gear members and the plungers. When a plung er is driven radially outwardly by a tooth 420 into engagement with a dog 55. a change takes" place in the relative angular position of the hunting gear with respect to the plunger, due to the fact that the number of teeth of the gear is prime with respect to the number of plungers.

Since the hunting gears 42, 4201 are provided with a number of teeth, which is prime with respect to the number of plungers 45, the said gears will be advanced or retarded for each revolution of the gear 46, depending uponthe number of teeth gears 42, relatively to the number of plungers 45. In the example shown, the gear 4.2 having twenty-seven teeth will be retarded one tooth per one revolution of said gearand the gear 42o having twenty-five teeth will be ad vanced one tooth per ISVOllltlOIl 0; said gear. In thisinstance the product of25x27 gives a num her which, when multiplied by'a number less than" twentydour, (the number of printing bars) and divided by twenty-four, gives a whole number. For example, 25x27 equals 675; 675x8 equals 5400; 5490 divided by 24 equals a wholenumber. Thus in the presentcase the printing teeth will not repeat in a number oi revolutions equal tothe' product of 25x27 x8, considering one printing bar only.

hetus assume, however,-that the hunting gear iz lias twen'ty-nine teeth and gear 42a has thirtyone teeth, acombination whose product when multiplied by any number up to twenty-four and divided by twenty-four gives a quotient ending in a r raetioni 'I'he'n the printing teeth: 420 would not repeat in the cycle for a number of revolu tionsequal to tne rum-user of rinting bars times the number of teethin each hunting gear, or the product of 24 "29 31, neglecting the spacing of tlre printing' strokes. This event is timed to occur with respect to'one printing bar. If the bar cycle occurs once in say every 18 inches of yarn or threadgthen repetition of that particular mark will not reoccur'lineally fora number of revolut'ion's equal to the product of 18 2e 29 31. This number may be increased simply by adding additional hu'nting gears or camplates each hav ing an odd number of teeth and having a circur hferential arrangement of shallow printing teeth which difier with respect to the teeth and scope of the invention as defined by the an i pended claims.

What I claim is:-'

l. Ina machine of the class specified, a printing roll, a plurality of printing bars mounted for limited radial movement on said roll, means for driving" said roll, and means for actuating said bars, said latter means including a hunting gear and a plurality of radially-movable motiontransmitting' units mounted around and having relative angular shifting movement with respect to the teeth of the gear, said gear having teeth adapted to co-act with said units, the sum of the teeth relative to the units being a prime number.

2. In a machine of the class specified, a printing'roll, a plurality of printing bars mounted for limited radial movement on said roll, means for driving said roll, and means for actuating said bar's; said latter means including a hunting gear and a plurality of radially-movable motiontransmitting units mounted around and having relative angular shifting movement with respect to the teeth of the gear, said gear having teeth adapted to co-act with said units, the number of co -acting teeth and units bearing a prime relation one with respect to another.

3; In a machine of the class specified, a printing roll, a plurality of printing bars mounted for limited radial movement on said roll, means for driving said roll, and means for actuating said bars, said latter means including a hunting gear and a plurality of radially-movable motiontransmitting units mounted around and adapted to have'relative angular shifting movement with respect to' the teeth of the gear, said gear having teeth adapted to co-a'ct with said units, there limited radial movement on said roll, means for use driving said roll, and means for actuating said bars, said latter means including a hunting gear and a plurality of radially-movable motiontransmitting units mounted around and adapted to have relative angular shifting movement with respect to said gear, the ratio of gear teeth and units being such as to either advance or retard the gear relatively to the units for each revolution thereof.

5. In a machine of the class specified, a printing roll, means for rotating said roll, a plurality of printing bars mounted for limited radial movement on said roll, and means for actuating said bars during rotation of said roll, said means including one or more mutilated hunting gears and a plurality of co-acting radially-movable motiontransmitting units mounted around and having relative angular shifting movement with respect to the teeth of said gears.

6. In a machine of the class specified, a printing roll, means for rotating said roll, a plurality of printing bars, bar actuating cam members mounted for coacting limited radial and longitudinal movement on said roll for imparting radial printing movement to said printing bars, a plurality of radially movable plungers, means having a positive driving connection with said roll for supporting said plungers, a hunting gear provided with teeth adapted to co-act with said plungers, and means for transmitting motion from said plungers to said printing bar actuating members.

7. In a machine of the class specified, a printing roll, means for rotating said roll, a plurality of printing bars mounted for limited radial movement on said roll, a plurality of cam bars for actuating said printing bars, said cam bars being mounted for longitudinal movement with respect to said roll; and means for actuating said cam bar including a mutilated hunting gear and a plurality of radially movable plungers mounted around said gear, said gear having teeth adapted to co-act with said units and being free to have relative angular movement with respect thereto, and a gear member for carrying said units having a positive connection with said printing roll, there being a prime number of co-acting teeth relative to the number of units.

8. In a machine of the class specified, a printing roll assembly comprising a supporting shaft, a plurality of cam bars mounted for longitudinal movement around said shaft, a pluralityoi printing bars supported for radial movement by said cam bars; and means for imparting longitudinal reciprocatory movement to said cam bars comprising a plurality of pivoted members mounted for positive rotation with said printing roll, a plurality of radially movable plungers for actuating said pivoted members, and one or more relatively movable hunting gears co-acting with said plungers, the total number of teeth of said latter gears and the total number of plungers being prime one with respect to the other to thereby produce relative angular movement between the hunting gears and plungers during each revolution of the hunting gears.

9. In a machine of the class specified, a printing roll assembly comprising a main supporting shaft, a plurality of longitudinally movable cam bars mounted around said shaft, a plurality of coacting printing bars mounted for radialmovement on said cam bars, a gear for driving said roll, a plurality of pivotally mounted dogs mounted for positive rotation with said gear and adapted to transmit motion to said cam bars, a further gear connected to said printing roll gear, a plurality of radially movable plungers carried by said latter gear and adapted to engage said dogs, and one or more hunting gears mounted for free rotation with respect to said plunger-carrying gear and provided with teeth adapted to co-act with said plungers, the teeth in said hunting gear being greater or less by an odd number than the number of plungers.

10. In a machine of the class specified, a printing roll, a plurality of radially movable printing bars carried by said roll, a plurality of longitudinally movable cam bars adapted to actuate said printing bars, and end retainer members provided with radial guide ways for said printing bars, means carried by said retainer members for normally urging said printing bars to retracted position, and means for actuating said cam bars to move said printing bars into printing position; said means comprising a plurality of pivotally mounted dogs having a positive connection with said printing roll, a plurality of co-acting radial movable units rotating adjacent to and in synchronism with said dogs, and a relatively angularly movable hunting gear for actuating said units, said gear being provided with a plurality of printing teeth and a plurality of non-printing teeth, the total number of teeth of said gear and the total number of units bearing a prime relation to each other to produce relative angular movement therebetween.

11. A printing roll assembly for yarn or thread printing machines comprising a main supporting shaft, a plurality of longitudinally reciprocating cam bars, a plurality of radially reciprocating printing bars, end retainer members provided with radial guide ways for said bars, a relatively stationary cam at one end of said roll for normally urging said cam bars in one direction, and means at the opposite end of said roll for moving said bars in the opposite direction, said means comprising a gear secured on the end of said shaft and provided with a plurality of pivotally mounted dogs and an idler gear in mesh with said last named gear, said idler gear carrying a plurality of radially movable plungers adapted to engage said dogs and one or more hunting gears mounted within said idler gear and adapted to actuate said plungers.

12. In a machine of the class specified, a printing roll, a plurality of radially movable printing bars carried by said roll, a gear secured on one end of said roll, andian idler gear in mesh with said first named gear, said idler gear carrying one or more relatively movable hunting gears and a plurality of radially movable plungers mounted for positive rotation with the idler gear, the number of teeth of said hunting gear being greater or less by an odd number than the number of plungers, and means for transmitting motion from said plungers to said printing bars to actuate the latter.

13. In a yarn or thread printing machine, a printing roll assembly comprising a shaft, pairs of co-acting longitudinally and radially movable cam bars mounted around said shaft, one bar of each pair being longitudinally movable and its coacting bar being radially movable, said bars being provided'with co-acting cam teeth on the opposed iaces thereof, means for irregularly actuating one bar of each pair longitudinally of said roll to impart radial movement to its co-acting bar, and printing bars secured on said radially moving bars.

14. In a yarn or thread printing machine, a

printing roll, radially movable printing bars on said roll; and means for actuating said bars comprising a longitudinally movable cam bar, a gear secured on the end of said roll, said gear being provided with a plurality of pivotally mounted dogs, an idler gear in constant mesh with said first named gear, said idler gear being provided With a plurality of radially extending grooves, a plurality of plungers mounted in said grooves, and one or more hunting gears mounted on the same axis as said idler gear, said hunting gears being mounted for relative movement with respect to said idler gear and being provided with teeth which co-act With said plungers, the relative ratio of teeth and plungers being such as to advance or retard each hunting gear during one revolution of said idler gear.

15. In a yarn or thread printing machine, a plurality of printing units mounted in series, each of said units comprising a dye feeding roll, a dye roll and a printing roll, said rolls being geared for synchronous rotation; an idler gear connected for positive rotation with and adjacent to said printing roll, one or more hunting gears mounted for relative free. rotation on the same axisas said idler gear, said idler gear carrying a plurality of radially movable freely slidable plungers adapted to engage the teeth of said hunting gears during pivotally mounted dogs connected to said printing roll, a radially movable printing bar for each i of said dogs, and means for transmitting motion from said dogs to said printing bars to actuate the latter.

16. A printing roll assembly for yarn or. thread printing machines comprising a plurality of radially movable printing bars, a plurality of bodily rotating radially movable units, means for transmitting motion from said units to said bars, and a relatively rotatable hunting gear for actuating said units, said gear being provided with teeth whose number is greater or less than the number of said units and prime with respect to the latter.

1?. A printing roll assembly for yarn or thread printing machines comprising a plurality of radially movable printing bars, a plurality of bodily rotating radially movable units, means for trans mitting motion from said units to said bars, and a relatively rotatable hunting gear for actuating said units, said gear being provided with teeth which co-act with and whose number bears a prime relation to the number of units.

18. A printing roll assembly for yarn or thread printing machines comprising a supporting shaft, a plurality of longitudinally movable cam bars mounted on said shaft, a plurality of radially movable cam bars adapted to co-operate with said longitudinally movable bars, printing bars secured on said radially movable bars, end retainer members provided with radial guide ways for said radially moving bars, spring means adapted to normally urge said last named bars radially inwardly against said first-named bars, a cam for normally urging said longitudinally movable bars in one direction; and means for normally urging said bars in the opposite direction, said means comprising a plurality of pivotally mounted dogs, a gear connected to said printing roll shaft for carrying said dogs, and an idler gear connected to said first named gear, said idler gear being provided with a plurality of radially movable plungers; and means for actuating said plungers, said means comprising one or a plurality of hunting gears which have a free floating action on the same axis as said idler gear and are provided with a plurality of teeth-adapted to co-act with said plungers and transmit motion to said dogs, the number of teeth of each hunting gear and the number of plungers being prime with respect to one another.

19. In a yarn or thread printing machine, means for irregularly printing the yarn or thread including one or a plurality of hunting gears provided with teeth which have a certain number thereof shallow in depth to act as printing teeth, printing bars or analogous members, and means for transmitting motion from said printing teeth to said bars, said latter means including a plurality of cam elements mounted around said hunting gears and having relative angular shifting movement with respect to the teeth of the gears.

20. In a yarn or thread printing machine, means for irregularly printing the yarn or thread including an idler gear which houses and carries therewith a plurality of radially movable units, and one or a plurality of hunting gears mounted for relative angular movement on the same axis as the idler gear and provided with teeth adapted to co-act with said units.

' JOSEPH D. KREIS.