US2591612A - Top roll assembly - Google Patents

Description

April 1, 1952 o. R. RowE ET AL TOP ROLL ASSEMBLY Filed Feb. 7, 1948 amr/naaf OLIVER R Rows GEORG: Scnosuscx WILLIAM J. SroLPV pmu/#Md HJM manufacture.

Patented Apr. l, 1952 UNITED STATES PATENT OFFICE TOP ROLL ASSEMBLY Oliver R. Rowe, George Schoeneck, and William J.,Stolp, Charlotte, N. C., assignors to R. H. Bouligny, Inc., a corporation of North Carolina Application February 7, 1948, Serial No. 7,006

12 Claims.

' This invention relates to top rolls for spinning frames and the like, and more particularly to a self-lubricating top roll assembly.

' Spinning frames and the like are used extensively in the textile industry to draft and work the libres of slivers, rovings, and other forms of partially formed yarn in the process of yarn These spinning frames are commonly arranged with pairs of drawing rolls disposed in spaced relation so that the slivers or ,rovings may pass successively between nbre-Working surfaces provided on the rolls, the pairs of rolls being driven at progressively increasing speeds which results in a drafting action as the slivers or rovings pass through the rolls;

AThe pairs of drawing rolls conventionally comprise a lower roll usually formed of steel and having a transversely fiuted nbre-working surface, and an upper or top roll having a yielding or resilient nbre-working surface. The iibreworking surface of the top rolls is presented by a body of some material especially adapted for the purpose, such as, leather or cork, or more recently synthetic rubber. This body of' material is mounted on a steel or cast iron mandrel or the like to dispose it in roll form, and is commonly referred to as a spinning cot. Usually, two cots are mounted in spaced relation on a common mandrel for operating association with a bottom roll. Also, according to the usual arrangement, the lower rolls are carried in xed mountings and are driven, while the mandrel of the top rolls is supported at each end in Y pocket bearings and is held in place by a saddle. This saddle rides the mandrel at its longitudinal center and is weighted to maintain the top rolls in proper operating relation with the bottom rolls so that the top rolls are driven by frictional contact with the lower rolls.

The lubrication of top rolls arranged in this lmanner has characteristically presented a trou- A blesome maintenance problem. With this arrangement, frequent lubrication is required both time consumed in maintaining proper lubrication for the top rolls. These open lubrication points,

. however, have the serious disadvantage of exposing the lubricant so that it accumulates the lint or "y formed during the spinning operation which not only impairs the effectiveness oi' the lubricant. but which also results in deposits of lubricant-contaminated material that may work into the yarn being processed and foul it. Also, with an arrangement of this sort, there is a tendency to lubricate the top rolls excessively which increases the above noted possibility of fouling the yarn being processed. Furthermore, the frequent lubrication required as noted above adds substantial labor costs to the operation of spinning frames.

Numerous efforts have heretofore been made to overcome the above noted difficulties by providing self-lubricating top rolls suitable for replacing the conventional top rolls now in use. Most prior eiorts have been characterized by an arrangement of rotating cots on a xed mandrel. So far as we are aware, however, none of these eiorts have provided a practical solution, -usually because external means were employed for lubricating the rotating cots which not only still required frequent attendance and substantial labor costs, but were easily subject to stopping up through collectionl of lint, and caused a messy condition if the lubrication supplied was at all excessive.

In those cases where internal means of lubrication `was provided for the rotating cots, the means provided was either not adequate for effective lubrication of the cots over long periods, or, if adequate, no provision was made to throttle or regulate the lubricant feed to the rotating cots so as to prevent leakage at the ends of the cots. Another common deficiency in the prior proposals was the absence of any means for excluding lint from the lubricated bearing surface of the rotating cots, which not only allowed lint to contaminate the lubricant, but would result in actual seizure of the rotating cots when the lint built up suiciently. Where eiorts have been made in prior top rolls arranged for self-lubrication to avoid the above noted difcultiesthe resulting construction has characteristically been so complicated as to prohibit commercial produciOn and use.

According to the present invention these diiiiculties and disadvantages are obviated in a top roll assembly arranged for self-lubrication. 'I'he top roll assembly of the present invention follows the usual arrangement of spinning cots on a supporting mandrel so that it is adapted to replace the conventional form of top roll without any further change in existing equipment. This assembly differs over the usual form of top roll only in that the spinning cots are mounted for rotation on the mandrel, and the mandrel is constructed to contain internally a supply of lubricant and feed this lubricant to the rotatin,r spinning cots. This arrangement makes it possible to eliminate entirely all manual lubrication of the top rolls during operation, since the top rolls have to be removed to regrind the fibreworking surfaces of the spining cots as often as two or three times a year, and lubrication for the spinning cots can easily be maintained for corresponding periods according to the present invention. Also, the arrangement of the present invention eliminates all open deposits of lubricant on the top rolls so that all danger of fouling the yarn with lubricant is precluded.

Another important feature of the present invention is the manner in which provision'is made for excluding lint from the lubricated surfaces of the mandrel on which the spinning cots rotate.

The top roll assembly of the present invention is described more in detail below in connection with the accompanying drawing in which:

Fig. 1 is a side elevation of a top roll assembly constructed in accordance with the present invention;

Fig. 2 is a transverse section taken on the line 2--2 in Fig. l;

Fig. 3 is a central longitudinal section;

Fig. 4 is a transverse section taken on the line 4'.4inFig. 3; and,

Fig. 5 is a fragmentary longitudinal section illustrating a modified embodiment of the invention.

As shown in the drawing, the top roll assembly of the present invention comprises a tubular shaft member Ill forming a mandrel, and sleeves II carrying spinning cots l2 disposed for rotation on the shaft member Iii. As mentioned above, the spinning cots I2 are spaced on the shaft member I in the usual arrangement, and the shaft member I0 forms a mandrel of usual dimension so that the top roll assembly of the present invention is interchangeable with tcp rolls of conventional form and design.

` The spinning cots I2 may consist'of any of the materials suitable for this purpose, andl may be imounted on the sleeves II in the same manner in which they. are mounted on the mandrels lnconventional top rolls. It is preferable in the usual case to form the sleeves Il of cast iron andthe shaft memberl of steel because these materials are generally available and relatively inexpensive, and lubrication of the top rolls is facilitated when they are used in the above noted combination. However, other materials may be selected as indicated or desired under particular circumstances. The sleeves II, for example, might be formed of bronze, brass, wood, plastic, or other bearing materials if desired.

The sleeves II carrying the spinning cots I2 are positioned longitudinally on the shaft member I0 by retaining means comprising a resilient ring member i3 carried in a circumferential groove I4 formed in the central portion of the interior surface of the sleeves II (see Fig. 3) or as at I on the exterior surface. of shaft member I0 (compare Fig. 5), and adapted to engage yieldingly complementary grooves I6 or I'I formed as the case may be on the exterior surface of shaft member l0 or in the central portion of the interior surface of the sleeves II, so as /to keep the sleeves II laterally in place on shaft member It. The grooves It and I5 are formed with sufficient depth to accommodate displacement of the resilient rings I3 to a position flush with the interior surface of the sleeves II or the exterior surface of shaft member I0. while the grooves I5 and I7 are formed with a depth somewhat less than half the cross-sectional diameter of the ring members I3. Accordingly, by applying lateral pressure the ring members I3 may be readily slipped in and out of engagement to install the sleeves II on or remove them from the shaft member I9 as required.

The sleeves II are further formed with circumferential grooves adjacent the end portions of the interior surfaces thereof. According to one embodiment of the invention these grooves take the form shown at IS in Fig. 3 of the drawing and are fitted with felt washers I9 extending from the grooves I3 in contact with the tubular shaft member le. However, the felt washers I9 may be omitted if desired, in which case the grooves will provide accumulating chambers to collect the lint in the general form of a washer to act as a shield, and they can be formed as shown at 2G in Fig. 5 with flared lip portions 2| so as to allow easy assembly of the sleeves Il when the retaining ring I3 is carried on the mandrel I0. Also, the end faces of the sleeves II are partially relievedcn a bias as indicated at 22 so as to provide Aat least'one extending fiat portion 23. The purpose'and function of'this arrangement of the endV portions of the sleeves lI is described further in detail below. p

As previously mentioned, the shaft member IG is tubular in form and of uniform diam'etenand contour throughout its length, except 'for aY central flat portion 2d (compare Fig. 2) provided to receive a saddle (not shown) so thatshaft .member I0 is prevented from rotating when the saddle is in place. The shaft member I0 is further provided with end closures adapting it as a reservoir for lubricant. These endV closures 25 may take a variety of forms and any'fform providing an effective closure for the end ofshaft member It may be used as desired. A convenient and perhaps the most satisfactory form i is lthat of a plug formed of rubber or the like.

andV fitted in the ends of shaftY member It in the natureof a stopper, as shown at 25 in Figs. 3 and- 5. When this form of end closure` 2 5 is used it is desirable to chamfer the inside edges at the ends of shaft member Il), as indicated at 25, to facilitate insertion and removal` of the end closures 25. g

The tubular shaft member Il] is formed vwith lateral openings extending through its walls as shown at lland 2S in Figs. Bland 5. All of these lateral openings 2'I and 28 are covered by the sleeves Il when assembled in operating relation on the shaft member I8.V Certain of these lat eral openings, as indicated by the reference numeral 2l, are positioned adjacent the longitudinal center of the sleeves I I for feeding lubricant between the interior surface of the sleeves-1I and the shaft member l0, while other ofthese lateral openings, as indicatedby the reference numeral 28, are locatedA adjacent the-,endl por tions'of thesleeves Il-for returning excess lubricant to the reservoir formed by the'tubular shaft member I0'.

The lateral openings 2'I provided for feeding lubricant to the sleeves II and positioned longitudinally in shaft member I adjacent the centralportions of the sleeve II, are 'also preferably positioned as closely adjacent the grooves I4 or Ifas practicalto insure adequate lubrication at the retaining ring member I3. Also, ac-

- member cording to the preferred arrangement shown in the drawing, the lateral openings 21 are arranged to extend through the top and bottom walls of the mandrel ID on the normal axis at the point of operating contact of the spinning cots I2. The bottom lateral openings 21 may, however, be shifted as much as 90 from this position if desired, although it is usually advantageous to arrange them inclined or oriented downwardly. These bottom lateral openings 21 are fitted with wick material 29 to provide a properly regulated iiow of lubricant from the tubular shaft member I0.

It addition, it is advantageous to provide a packing of absorbent material, as represented at 30 in the tubular shaft member ID for storing a supply of lubricant. The packing material 3U may be felt or the like, and should be selected for high absorbent properties so that it will absorb and store a maximum quantity of lubricant. The wick material 29 may also be felt if desired, but should be a relatively denser material which will provide a positive but relatively slow ow of lubricant from the tubular shaft member Iii. The wick material 29 is held in place by the packing material 3D which angles the wick material 2B over the inner edges of the lateral openings 21 when it is inserted in the tubular shaft member I0. This arrangement also maintains the wick material 29 in intimate contact with the packing material 3i) so that while the flow of lubricant is throttled in the downwardly oriented lateral openings 21 by the wick material 29, a ready supply of lubricant is still maintained in these openings at all times.

The shaft member I0 should be further conditined by roughening or minutely pitting the interior surfaces o'f-the` shaft member and the lateral openings 21 and 28 as indicated at 3l,

to enhance the lubricant transfer characteris-ry tics of these surfaces. This roughening may be provided by Sandblasting the interior of shaft member I0 intensively, or by acid etching, or by investing the shaft member I0 with a crystalline phosphate coating or the like such as is applied by the process commonly identified by the name Bonderizing A phosphate coating treatment provides surface characteristics which are particularly well suited to the needs of the ber ID conditioned in this manner, sufficient creepage of lubricant through the upwardly exytending lateralopenings 21 in 'shaft member I0 -is obtained to lubricate-the sleeves II even if -the downwardly oriented openings containing the wicks 2Q become stopped up.

In preparing the top roll assembly for use, the packingmaterial 30 contained in the shaft It is first saturated with lubricant. For this purpose, the end closures 25, or at least one of them, are removed and the shaft member ID is immersed in a supply of lubricant. t will be appreciated that the lubricant might also be applied in various other ways, 'but the method of immersing the shaft member I0 in lubricant, as 'described above, has the advantage of bringing the packing material 3G more surely to its full state of saturation, while at the same time avoiding excessive application of lubricant, for

" the-packing material 30 will reach a condition of equilibrium at full saturation when allowed to stand in the supply of lubricant. This procedure may also be followed without removing the end closures 25, although saturation of the packing material 30 with lubricant takes place more slowly if this is not done. Any suitable oil or the like adapted for lubricating machinery may be applied as a lubricant to the packing material 30 as described above.

After the shaft member Ill has been allowed to stand in the supply of lubricant for a suiiicient period to saturate the packing material 30, it is removed and wiped clean of lubricant on its exterior surfaces, and the end closures 25 are fitted in place. The sleeves II carrying the spinning cots I2 may then be slipped on the shaft member Iii to the point where retaining engagement of ring members I3 is obtained and the top roll assembly is ready for use.

In operation, lubricant is fed from the packing material 30 through the lateral openings 21 and between the interior surface of the sleeves II and the shaft member I0. Initially, as the interior surface of the sleeves II and the interior surface of the shaft I0 will be relatively dry, lubricant will flow by capillary action from the packing material 30 to these surfaces rela'- tively rapidly. When sufficient lubricant has been delivered to these bearing surfaces, however, to form an adequate lubricant film, a state of equilibrium is reached at which the capillary action inducing the iiow of lubricant is balanced by the cohesion of the lubricant lm formed at the bearing surfaces, so that further'ow of lubricant from the packing material is stopped. After this condition is reached, flow of additional lubricant will occur only as the equilibrium becomes unbalanced.

The only possible point of loss of lubricant from this system is obviously at the ends of the sleeves i I. This loss is limited, according to the present invention, so that it is unnoticeable and does not aifect the satisfactory operation of the top rolls, by locating thelateral openings 28 in mandrel I0 adjacent the end portions of the sleeves il.` As lubricant works outwardly toward the ends of the sleeves El, it is carried around the Vshaft by the rotation of the sleeves II and is thus presented to the lateral openings 23 which provide a creepage path for return of the lubricant to the packing material 3i), the return ,of lubricant being jinduced until the equilibrium conditionsrmentioned above are satisfied. The treatment of thel internal surfaces of the lateral openings 28 soV that they are pitted and roughened as previously described facilitates the return flow or creepage of the lubricant. The top lateral openings 21 may likewise serve to return lubricant as it is delivered to the sleeves I I, although these openings constitute primarily equilibrium paths between the lubricant reservoir and the bearing surfaces.

The top roll assembly of the present invention may thus be made self-lubricating for an extended vperiod of time. Actual tests have shown that adequate lubrication for top'roils arranged in this manner can easily be maintained for periods in excess of six months. The spinning cots I2 must be removed more frequently than this for regrinding, and while the spinning cots I2 are being reground the packing material 30 may be resaturated with lubricant, so that all lubrication of the top rolls can be serviced conveniently and without loss of time while the top rolls are removed from operation.

As previously mentioned, a furtherimportant feature of the top roll assembly of the present invention isthe arrangement of the end portions of the` sleeves Il for excluding lint from between the lubricated interior surface of the sleeves II and the tubular shaft member I6. For this pur- -pose,the sleeves I I are formed with circumferential grooves adjacent the end portions of the interiorsurfaces thereof asdescrbed above. in the embodiment of the invention shown in Fig. 3 of the drawing, thesecircumferential grooves i2 are fitted with felt washers I9 which extend in contact with the, tubular shaft member til.

ri'he washers I9 may also be formed if desired ofv any 'other suitable packing material having sufficient flexibility for fitting in the circumferentialgrooves I8 and suicient resilienceor pliability, for maintaining effective contact with the 'shaft member I5. during rotation of the sleeves Il. Rubber might be used for the washers iii, for example, or a rubber-backed felt material could be used. Simple felt washers, however, are perhaps best adapted for use according to the present invention because-they are not deteriorated, such as rubber would be, by contact with the lubricant supplied to the sleeves II. As a matter of fact, the felt washers I9 have the particular advantage of' absorbing any lubricant which may work past the lateral drain openings 28. and thus providing further means for pre `ventingleahage oflubricant at the ends of the sleeves I I, and affordinga further reservoir point vforassisting in the maintenance ci equilibrium Athe shaft member HL' This abrasive action may be so pronounced in certain circumstances as to cause `the top roll assembly to break down or seize long before relubrication should be necessary.

The felt washers I9 preclude this result by forming a barrier having a great affinity for the lintso that it 'retains and excludes the lint from between the lubricated interior surface of the sleeves. IIV and the shaft member IS.. The ar- 'e rangement of the felt washers I9 in the circumferential grooves I8 provides for effective disposition of these washersas a lint barrier in relation to shaft member ill, while at the saine time maintaining the washers IS as a composite element of the sleeves II so that they create no assembly problem.

We have found that the exclusion of lint atthe ends of the sleeves lI may be further aided by lrelieving the end faces of the sleeves Ii on a bias as previously mentioned andas shown in the drawing at 22. This biased portion i?. should'be arranged to leave at least one extend ing nat or protruding portion 23 on the end faces ofthe sleeves II. A very satisfactory arrangement, as shown in the drawing, is to bias the end faces of the sleeves II in opposite directions 'so as to leave two extending fiat portions E3, The number of protruding portions 23 may be still further increased, if desired, so that a toothed 4conf!guration in the endiaces ofthe'sleeves II results, but the arrangement with only two flat portions 23 as shown in the drawinghas the advantage of allowing a less acute degree 'or angle of relief in forming the biased portions 22, so that the extent of the end faces of the sleeves II can be limited closely adjacent the edges of thespinning cots I2, which is desirable, and also so that a more gradual bias or taper is presented to thev lint accumulation.

The'function of the biased portions 22 on the end faces of the sleeves II is to displace lint on the shaft member I0 from thesleeves I I and vkeep it pushed back from complete circumferential rubbing contact against the end facesv of the sleeves II, so that the lint is not' presented for entrance between the sleeves II and the shaft member It. The biasel portions 22 act in the nature of a plow or wedge for this purpose during rotation ofthe spinning cots l2, with the result that the lint builds up as a collar on the shaft member I adjacent the protruding portions- 23 on the end faces of the sleevesV II rather than entering the end of the sleeves II. Theextending flat portions 23 are provided to space this displaced lint in a. collar on the shaft I0, the portions 23' purposely being made to protrude with a flat or rounded configuration, and preferably being polished smooth, so that they are adapted to rub this collar of lint withoutdisimegratng it. A further result of the reduced circumferential contact of thelint collaragainst the end faces of the sleeves Il is to reduce the possibility of absorption of lubricant by the lint collar from the endof the sleeves II.

When theend faces of thesleeves II are arranged in this manner, useof the felt washers I9 may in many` circumstances be eliminated if desired. If the felt washers I9 areelminated, the circumf'erentialv grooves may be formed as shown at-2Il inFig. with flared lip portions 2| so that the retaining rings I'may be carried on the mandrel Iand compressed by these'fiared lip portions 2I foi` assembly of the. sleeves II ori-the randrel I0.

The circumferential grooves 20 then become accumulating chambers for any lintv which may enter the ends ofthe sleeves I I and the lint that deposits in thegrooves` 20 in this manner tends to build up in the form'ofa washer which then as a` shield against'furtherjpassage of lint.

In addition tol the substantial "operating advantages of tlietoprollassembly of thisinvention'as pointed outin the-foregoing description, thislassembly has the further'advantageiof a simple and i sturdy construction. The arrangement of the asseinbly is such that standardv tubular stock may be used for the shaft'member4 I0, and as the shaft' member vI is of uniform'diameter throughout its entire length, except' for the saddle positioning fiat I8, it is easily machined for' incorporation in the assembly. Also, as previously noted, conventional spinning cots I2 Ymay be used with the assembly, and ther` assembly is interchangeable in spinningframes and the like with conventional toprolls, Without anyunodification of the spinning'frames on whichthey are installed.

We claim:

l. A top roll assembly forspinning frames and the like comprising a tubular shaft member forming a mandrel andV adapted as a 'reservoir .for lubricant, sleeves carrying spinning cots disposed for rotation onsaid tubular shaftmember; said shaft member beingjformed with lateral openings allowing ltransfer of lubricant betweenthe reser- 9 Voir formed by said shaft member and the interior surface of said sleeves, certain of said lateral openings being positioned adjacent the longitudinal center of said sleeves forifeeding lubrifor lubricant, sleeves carrying spinning cots disposed for rotation on said tubular shaft member, and lateral openings extending through the walls of said tubular shaft member for transfer of lubricant between the reservoir formed by said shaft member and the interior surface of said sleeves, all of said lateral openings being covered by said sleeves, certain of said lateral openings being positioned adjacent the longitudinal center of said sleeves for feeding lubricant between the interior surface of said sleeves and the exterior surface of said shaft member, and other of said lateral openings being located adjacent both of the end portions of said sleeves for returning excess lubricant to the reservoir formed by said shaft member, said last mentioned openings extending upwardly from said reservoir and being unobstructed.

3. A top roll assembly for spinning frames and the like comprising a tubular shaft member forming a mandrel and adapted as a reservoir for lubricant, sleeves carrying spinning cots disposed for' rotation on said tubular shaft member-,`and lateral openings extending through the Walls of said tubular shaft member adjacent the longitudinal center of said sleeves as Well as adjacent both of the end portions thereof for feeding and return of lubricant between the reservoir formed by said tubular shaft member and the interior surface of said sleeves, the openings adjacent said sleeve end portions extending upwardly from said reservoir and being unobstructed.

f1. A -top roll assembly for spinning frames and the like comprising a tubular shaft member forming a mandrel and adapted as a reservoir for lubricant, sleeves carrying spinning cots disposed for rotation on said tubular shaft member, and lateral openings extending through the walls of said tubular shaft member for transfer of lubricant between the reservoir formed by said tubular shaft member and the interior surface of said sleeves, the interior surfaces of said tubular shaft member and said lateral openings being invested with a crystalline phosphate coating for enhancing the lubricant transfer characteristics of said surfaces.

A top roll assembly for spinning frames and the like comprising a tubular shaft member forming a mandrel, sleeves carrying spinning cots disposed for rotation on said tubular shaft member, end closures adapting said tubular shaft member as a reservoir for lubricant, and lateral openings extending through the walls of said tubular shaft member adjacent the longitudinal center of said sleeves as well as adjacent both of the end portions thereof for feeding and return of lubricant between the reservoir formed by said tubular shaft member and the interior surface of said sleeves, certain of said lateral openings adjacent the longitudinal center of said sleeves being oriented downwardly and the lateral openings adjacent said sleeveend portions extending upwardly from said, reservoir,` the interior surfaces of said tubular shaft member and said lateral openings being minutely pitted for enhancing the lubricant transfer characteristics of said surfaces, saidupwardly extending lateral openings being unobstructed, and wick material being disposed in said downwardly oriented lateral openings. A

6. A top roll assembly for spinning frames and the like, comprising a tubular shaft member forming a mandrel, sleeves carrying spinning cots disposed for rotation on said tubular shaft member, and means for lubricating said sleeves for rotation on said shaftmember comprising end closures adapting said tubular shaft member as a reservoir for lubricant, a packing of absorbent material in said tubular shaft member for storing a supply of lubricant, and lateral lopenings extending through the walls of said tubular shaft member for transferf lubricant between-said packing material and the interior surface of said sleeves, all of said lateral openings-being covered by said sleeves, certain of said lateral openings being positioned adjacent the longitudinal center of said sleeves for feeding lubricant between the interior surface 0f said sleeves and the exterior surface of said shaft member, and other of said openings being located adjacent both of the end portions of said sleeves for returning excess lubricant to the reservoir formed by said shaft member, said last mentioned openings extending upwardly from said .forming a mandrel and adapted .as`a`reservir for lubricant, sleeves carrying spinning cots` -.'dis posed for rotation on said tubular shaft member, and lateral openingsextending through the walls of said tubular shaft member adjacent the longitudinal center of said sleeves as well as adjacent both of the end portions thereof for transfer of lubricant between the reservoir formed by said tubular shaft member and the interior surface of said sleeves, the lateral openings adjacent said sleeve end portions extending upwardly from said reservoir and being unobstructed, the interior surface of said sleeves being circumferentially grooved adjacent both of the end portions thereof beyond said last mentioned lateral openings,

and said grooves being fitted with felt washers extending in contact with said tubular shaft member for preventing entrance of lint between the lubricated interior surface of said sleeve and said tubular shaft member.

8. A top roll assembly for spinning frames and the like comprising a tubular shaft member forming a mandrel and adapted as a reservoir for lubricant, sleeves carrying spinning cots disposed for rotation on said tubular shaft member, and lateral openings extending through the walls of said tubular shaft member adjacent the longitudinal center of said sleeves as well as adjacent both of the end portions thereof for transfer of lubricant between the reservoir formed by said shaft member and the interior surface of said sleeves, the lateral openings adjacent said sleeve end portions extending upwardly from said reservoir and being unobstructed, said sleeves being formed with a circumferential groove adjacent the central portion of the interior surface thereof and carrying a resilient ring member in said groove for yieldingly engaging a complementary if groove formed in said tubular shatxnember, and the interior surfaceof saidV sleeves 'beingformed with further circumferential grooves adjacent cant ibetween the reservoir formed by said shaft member'and the interior'surface of said sleeves, theend faces of said sleeves being relieved'on a bias. whereby said end faces act in the nature of ai plow'to; displace lint on said tubular'v shaft member vfrornsaid sleeves during rotation of `said spinningcots', and the interior surface ofsaid sleevesbeing circumierentially Agrooved adjacent the end'portions thereof, said groovesy providing accumulating chambers for lint entering between said tubular shaft member and said sleeves.

10. A top roll assembly for spinning cots and the like as dened in claim 9 and further characterized' in that saidgrooves in the interior surface of said sleevesn adjacent the end portions thereof are tted with felt washers rextending in contact withsaid tubular shaft member for preventing entrance' of lint between the lubricated interiorsurface of said sleeves :and said tubular .shaf t .memb er.

l1. A" top roll assembly' forspinning' frames andthe likeLcomprising a tubular 'shaft member frminga' mandrel and' adapted'as' a reservoir forlubricant; sleeves carrying spinning'cots disposed for rotation on said tubular shaft member,

andlateral openings extendingthrough the walls ofY sai-d tubularshaft member for transferV oi lubricant betweenv the reservoir formed by said shaft member and the Vinterior surface ofsald sleeves, the end'faeesiofsaidsleevesl being partially-relieved on' a bias providing', atleast one protruding lportion whereby the biased portion of said end faces'acts-inthe nature of a plow to displace li-nt on saidtubularshaft member from said sleeves andY saidy protruding portion tends to space the displaced lint inY a; collar on said tubular shaft member during rotation o said spinning cots.

l2. A topv roll assembly for spinning cots and the likeas definedin'claim 11 and'further characterized in that the vinterior surfaces of'said sleeves are circumferentally grooved adjacent the end portionsk thereof-said grooves being` formed with iiaredV lip portions and'providing accumulating chambers s for lintlenteringbetween said tubular shaft member Aandsaid sleeves.

OUWER R. ROWE; GEO. SCHOENECK. WILLIAM, J. STOLP'.

REFERENCES CITED Thefollowing references are of record in the le of lthis patent:

UNITED STATES PATENTS Number: Name Date 212,670 Fenton et a1 Feb. 25, 1879 313,133 Tuttle Mar. 3, 1885 342,778 Carroll June 1, 1886 414,224' Kellogg Nov. 5, 1889 628,521 Campbell July 11, 1899 739,041 Weiss. Sept. 15, 1903 1,630,842.: Grubb May 31. 1927 FOREIGN PATENTS Number Country Date 15,464.- Great.Britain of,1903

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