US2601705A - Stahlecker - Google Patents

Description

July 1, 1952 w. STAHLECKER DRAWING MECHANISM FOR SPINNING MACHINES 2 SHEETS-SHEET 1 Filed NOV. 13, 1950 a Imus/75011" W 3 July 1, 1952 w. STAHLECKER 0 DRAWING MECHANISM FOR SPINNING MACHINES Filed Nov. 13, 1950 2 SHEETSSHEET 2 JZgc' Inventor? Patented July 1, 1952 OFFICE DRAWING MECHANISM FOR SPINNING MACHINES Wilhelm Stahlecker, Tubing-en, Germany Application November 13, 1950, Serial No. 195,191

, In France September 10, 1948 13 Claims. (01. 19 1a0) My present invention relates to a drawing mechanism for a spinning machine in which the upper rollers of the forward drawing field are saddle loaded.

One of the objects of my present invention is to provide a saddle member unit for the upper rollers of drawing mechanism which does not require any adjustments therein.

Another object of my present invention is to provide a saddle member unit which may be easily removed from the drawing mechanism so that it may be replaced by another saddle member unit of a different size than said first-mentioned saddle member unit.

A further object of my present invention is to provide a saddle member unit which will not permit the upper rollers to fall when the saddle member unit is removed. 7

A still further object of my present invention is to provide a saddle member unit which can have the loading means for the upper rollers removed therefrom only after the saddle member is removed from the drawing mechanism.

Another object of my present invention is to provide a saddle member unit which is of a simple, substantially one-piece construction so that it lends itself to mass production.

A preferred embodiment of my present invention mainly consists of a saddle member having some parts thereof shaped in such a way that the saddle member unit may be mounted on the shafts connecting the upper rollers of the forward drawing field and having other parts thereof immovable with respect to the first-mentioned parts and shaped so as to form holders for the clearer rollers, connecting means fixedly mounted on the saddle member unit for connecting the load for the upper rollers to the saddle member unit, the last-mentioned means being immovably mounted on the saddle member unit and means for connecting the saddle member unit to the drawing mechanism in such a way that the saddle member unit may be removed-from the drawing mechanism and replaced by a saddle member unit of a different size than the first mentioned saddle member unit.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

Fig. 1 shows a side elevation of a drawin mechanism constructed in accordance with my present invention, with parts thereof shown in section;

Fig. 2 shows a side elevation, partly in section, of some of the structure shown in Fig. 1;

Fig. 3 shows an embodiment of a saddle member which is of a slightly diiferent construction from the saddle member shown in Figs. 1 and 2;

Fig. 4 is a side view, partly in section, of a further embodiment of a saddle member constructed in accordance with the present invention;

Fig. 5 is a sectional view of a still further embodiment of a saddle member constructed in accordance with my present invention;

Fig. 6 is a plan view, partly in section, of a saddle member of the type shown in Figs. 1 and 2 and Fig. '7 is a sectional view taken on line 'il of Fig. 2 and looking in the direction of the arrows.

In drawing mechanism of machines for spinning cotton, cellulose fiber, wool and the like, it is customary to use either self loaded upper rollers, which are so large and heavy that they grip the fiber material between the upper and lower roller as a result of their own weight, or upper rollers of small diameter and weight which are known as saddle-loaded rollers. Where saddle-loaded upper rollers are used, the necessary gripping of the fiber material is obtained by means of a loading device which cooperates with a saddle member located on the upper rollers.

Self loaded upper rollers can seldom be made large enough to efficiently grip the fiber material because the drawing mechanisms do not provide room enough for such large upper rollers and because such upper rollers are diificult to handle. As the diameters of the self loaded upper rollers increase, the contact conditions between the upper and lower rollers become less favorable, and the gripping action becomes less reliable. This type of upper roller provides components of force which act in a direction parallel to the drawing plane as well as in a direction perpendicular to the drawing plane. This action is particularly disadvantageous because only the component acting in a direction perpendicular to the drawing plane is used for gripping the fiber material, whereas the component acting parallel to the drawing plane causes undesired friction in the upper rollers with the result that the upper rollersbecome worn and cannot be rotated eificiently by the lower rollers.

In spite of the disadvantages, self loaded upper rollers are generally preferred mostly for the entrance rollers in double-adjustable drawing mechanisms for ring spinning machines, because they simplify the adjustment of the drawing mechanism. If, in place of self loaded upper rollers, rollers are used which require additional loading means, then the device for attaching the load to the upper rollers must be adjusted in addition to the upper roller holder itself each time the drawing mechanism is adjusted. In addition to these operations, the adjustment of the clearer roller holders is also required so that the matching of the roller positions of the drawing mechanism to the length of the fibers of the spinning material requires a very co1nplicated process involving the use of expensive and elaborate adjustment mechanisms and the like.

Due to recent investigations, it has become desirable to operate drawing mechanisms with 'a much greater drawing force in the forward drawing field than was generally used heretofore. This is particularly true in the working of synthetic fibers. This circumstance requires a great gripping force at the point where the fibers are drawn into the drawing mechanism, which, due to the above-mentioned reasons, can only be obtained by saddle loaded upper rollers.

My present invention avoids the above men tioned difficulties and make possible the use of saddle loaded entrance rollers with their preferable spinning techniques, without requiring several adjustments of the load carrier, the spacing of the rollers and the point of application of the load each time the drawing mechanism is matched to different fiber lengths of the spinning material. In this way the danger of erroneous adjustments is avoided.

This important advance is obtained by the use of interchangeable load carriers in Which the relation between the upper rollers of the forward drawing field, the corresponding point of application of the load and location of the clearer roller holders are not adjustable. The drawing mechanism is adapted to be used for various fiber lengths of the spinning material simply by changing one load carrier for another load carrier of a different size.

My present invention takes advantage of the fact that an accurate adjustment of the rollers to the fiber length of the spinning material is not as important in the forward field of the drawing mechanism as it is in the main drawing field, so that the relationship between the rollers in the forward drawing field can be regulated by a series of steps. If the magnitude of these steps are properly chosen so as to permit the drawing mechanism to operate efficiently, it will be possible in general to use only two to four different positions of the rollers in the forward drawing field.

In the construction shown in Fig. 1, the saddle member unit 4 is mounted on the upper rollers l and 2 of the forward drawing field. This saddle member 4 is made of sheet metal and has a U- shaped cross section, as may be seen from Fig. 5. The depending side portions of saddle member #3 have parts thereof cut away so as to form recesses extending upwardly from the lower edges of these side portions. As is shown in Fig. 6, the saddle member 4 is connected to the shafts which extend between the upper rollers l and 2. These shafts are received in the above mentioned recesses, as is clearly shown in Fig. 1.

Parts of the top portion of saddle member 4 are bent upwardly so as to form clearer roller holders l3 and l 4, as shown in Fig. 1.

' In order to connect the saddle member 4 to the drawing mechanism, an opening 29 is formed in the top portion of saddle member i. Pivotally mounted on the drawing mechanism is the pawl member 25 which engages an edge of the opening 29, as is clearly shown in Fig. 1.

In order to provide a proper load for the upper rollers l and 2, the saddle member 4 is provided with a cross member i which extends across the space between the depending side portions of saddle member 4 and is fixedly connected at its ends to these side portions. The member 1 may be of the type shown in Fig. 6, where the ends extending through the sides of saddle member 4 are upset; or the member 1' may simply-be a bolt and nut, as is designated by element 1, shown in Fig. 7.

The hook member 6, which has the loading weight (not shown) connected at the lower end thereof, is mounted on an elongated shaft member 3 on the upper part of which a number of notches are provided for seating the hook member 6 and adjusting it so as to achieve proper contactrpressure of the rollers, said notches being not shown in the drawing. The saddle member for the delivery rollers of the drawing mechanism is connected to the rear end of shaft memher it, as is clearly shown in Fig. l. Mounted on this last mentioned saddle member is the holder 21 for the clearer roller 28. The elongated shaft member is provided with a projection it at the forward end thereof.

A bifurcated element 15 is formed with an opening passing transversely therethrough and the elongated shaft member 8 extends through this opening. A threaded opening extends through a portion of bifurcated element I 5 which overlies the elongated shaft member 8, and the set screw 5 is threadedly mounted in this lastmentioned opening so as to rigidly connect element l5 to element 3. The bifurcations of element is are mounted on opposite sides of cross member I, as is clearly shown in Fig. 1. It may be seen from Fig. 7 that element l5 does not extend the entire distance across the space between the depending side portions of saddle member 4.

The saddle member 4 is provided with a cut out portion 9 in the top portion thereof, as shown in Fig. 1, so that the hook member 6 may be guided along the elongated shaft member 8.

As was mentioned above, saddle member 4 contains no adjustable parts so that, when it is necessary to provide a relation between the upper rollers l and 2 which is substantially different from that shown in Fig. 1, the saddle member 4 shown in Fig. 1 is removed and replaced by another saddle member of a different size.

Saddle member 4 is removed first by taking oif clearer roller 28, then removing hook member 6, and then lifting pawl member 28 so that saddle member 6 may be moved from the carriage of V the drawing mechanism. When saddle member 4 is separated from upper roller 2, the set screw 5 is loosened and the shaft member 8 may be drawn through the bifurcated element 15 until the projection it comes in contact with the bifurcated element i5. It will be noted that the bifurcated element 15 is located so close to the top portion of saddle member 4 that it cannot be removed from cross member 7 by being raised in a direction perpendicular to the drawing plane. Therefore, when shaft member 8 has the projection 16 thereof in contact with, or located adjacent to bifurcated element I5, this element may be rotated through 90, as shown in Fig. 2. so that it may then be removed from cross member I. The new saddle member 4 is easily and accurately placed in proper alignment with the carriage of the drawing mechanism simply by a reversal of the above steps.

In the saddle members 4 which are of different sizes the cross member I and the cut out portions 9 are so arranged that the proper gripping force for the new relationship of the upper rollers is provided. Also, the clearer roller holders I3 and I I of the saddle members of different sizes are located in a proper position for the particular rollers with which the respective saddle members are to be used. In this way, the need for special adjustment of the point of application of the load and for holders of the clearer holders each time the drawing mechanism is adjusted is not required. Thus, an extremely simple means is provided for changing the positions of the upper rollers without errors and adjustments.

The depending side portions of the saddle member 4 are yieldingly formed so that they bear against the sides of the rollers as shown at I], I8, I9 and 20 in Fig. 6. In this way a faultless transmission ofthe force of the load to the upper rollers is obtained.

In the usual working of cotton and cellulose fibers, two or three well chosen saddle members 4 will usually suffice. Therefore, it is not necessary to purchase several groups of saddle members for each machine of a spinning plant, but instead a single group of saddle members will suffice for changing the roller positions of a whole row of machines.

In special cases, it may be desirable to provide a saddle member 4 of the type shown in Fig. 3 where several positions II are provided for the upper rollers, where several openings I2 are provided for the location of cross member I and where an additional clearer roller holder 24 is provided.

Under certain circumstances it may be desirable to secure the shafts connecting upper rollers I and 2 against falling during the removal of saddle member 4. In order to obtain this result a saddle member constructed as shown in either Figs. 4 or 5 may be used.

The spring means 25, shown in Fig. 4, comprises a pair of depending fingers associated with each of the shafts connecting the upper rollers and yieldingly holding these shafts fast to saddle member 4 so that when the saddle member 4 is removed these rollers are also removed. However, these rollers may easily be separated from member 4 by spreading apart the spring members 25.

The same result is obtained in a simple way by the structure shown in Fig. 5 wherein the depending side portions 2I of saddle member 4 are yieldingly mounted against the shoulders 23 of the upper roller members I and 2. These depending portions 2I are provided with outwardly bent ends 22, as shown in Fig. 5. Thus when the saddle member 4, shown in Fig. 5, is removed, the roller members I and 2 will be carried along with it but may be easily separated from saddle member 4 by moving the side portions 2I towards each other.

It is evident that the saddle members of my present invention are of a simple construction and may be very inexpensively manufactured, so that they lend themselves to massproduction techniques. They can be used with advantage not only for new drawing mechanisms but also lend themselves equally to the modernizing of old drawing mechanisms.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of spinning machines differing from the types described above.

While I have illustrated and described the invention as embodied in drawing mechanism for spinning machines, I do not intend to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of my invention.

Without further analysis, the foregoing will so fully reval the gist of my invention that others can, by applying current knowledge, readily adapt it for various applications without omit ting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by a shaft extending between said pairs of rollers, in combination, an elongated saddle member unit having a U-shaped cross section so that said unit comprises a pair of depending side portions forming a space therebetween and having upper edges connected by a top portion of said unit, the said side portions having lower edges distant from said upper edges and having parts thereof including said lower edges cut away so as to form spaced recesses in one side portion located opposite to spaced recesses in the other side portion, said recesses extending upwardly from said lower edges, whereby the shafts connecting the upper rollers may be located in said recesses of said saddle member unit, and said saddle member unit having parts of said top portion bent upwardly therefrom so as to form holders for clearer rollers; connecting means fixedly mounted on said saddle member unit for connecting the load for said upper rollers to said saddle member unit, said lastmentioned means being immovably mounted on said saddle member unit; and means for connecting said saddle member unit to said drawing mechanism in such a way that said saddle member may be removed from said drawing mechanism and replaced by a saddle member unit of a different size than said first mentioned saddle member unit.

2. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by a shaft extending between said pairs of rollers, in combination, an elongated saddle member unit having a U- shaped cross section so that said unit comprises a pair of depending side portions forming a space therebetween and having upper edges connected by a top portion of said unit, the said side portions having lower edges distant from said upper edges and having parts thereof including said lower edges cut away so as to form spaced recesses in one side portion located opposite to spaced recesses in the other side 7 portion, said recesses eirtending upwardly from said lower-edges whereby the shaftsconnecting the upper rollers maybe located in said recesses of said saddle member unit, and said saddle memberjunit having partsof said top portion bent upwardly therefrom "so as to formholders for clearer rollers; connecting means, "fixedly mounted onsaid saddle 'memberuiiit forconnecting the load for said upper rollers tolsaid saddle member unit; said last-mentioned means,

being imznovablymounted'on said saddle member unit, comprising a cross member'extending across said space between said dependingportions of said saddle member unit, located between said upper and lower edgesand having a pairof ends each of which is connected to oneof saiddepending side portions; and means for connecting said saddle member unit to saiddrawingmechan'ism'in such away that said saddlememberjmay be removed from said "drawingmechani'sm" and replaced by a saddlefmeniber unit of'a different size than said first mentioned saddle member unit. 7

3. In a drawingmechanism for spinningmachines having clearer: rollers and saddle loaded pairs of upper rollerslocated'in the forward drawing field and connected by a shaft extending between'said pairs of rollers, in combination, an elongated saddle member unit having a U-shaped cross section so that said unitcomprises a pair of depending side portions forminga space therebetween and having upper edges connected by a to portion of said unit, the said side portions having lower edges distant from said'upper edges and having parts thereof including said lower edges cut away so as toform spaced recesses'in 'one side portion locatedopposite to spaced recesses in the other side portion, said recesses extending upwardly fromsaid' lower edges, whereby the shafts connecting the upper rollers may be located in saidrecesses ofsaid saddle member unit, andsaidsaddle member unit having parts of said top portion bentupwardly therefrom so as to formholdersfor clearer rollers; connecting "means fixedly mounted on said saddle member unit for connecting theload for said upper rollers to saidsaddle member unit, said last-mentioned means, being immovably mounted'on said saddle member unit, comprising a cross'member extending across said space between said depending portions of said saddle member unit, located between said upper and loweredg'es and having a pair of endseach'of which is connected toone of said depending side portions; and a pawl member pivotally rnountedat the entrance end of said drawingmechanism, said top portion of said saddle member unit being formed with an opening passing therethroughand having anedge which said pawl member engages so as to connect said saddle memberunit to said drawing mechanism and so as to permit the removal of said saddle member unit from said drawing mechanism.

l. In a drawing mechanismfor"'spinning machine having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and'connect'e'd' by a shaft extending betweensaid pairs of rollers, in combination, 'an elongated saddle member 'un'it'havinga u sh'aped cross section'so' th'at'said unit comprises a pair or "depending side portions 'forming a space therebetween and havingupper edges connected by a top 'portionlof said unit, the said'side portions' having lower edges distant'irom said upper edges and having parts'throf. including said lower edges -cut away 'so'as toifo'r'm spaedre- V cessesextending upwardly from said lower'edges,

whereby theshafts'conn'ecting the upper "rollers may be located in said recesses of said saddle member unit; and said saddle member unit having "parts of said top portion bent upwardly therefrom so as to form holders for clearer rollers; connecting means fixedly mounted on said saddle member unit for connecting the load for said upperrollers to said saddle member unit, said last-mentioned means, being immovably mounted on said saddle member unit, comprising a cross member 'extendingacross said spaceibetween said depending portions of said saddle member unit, located between said upper andlower edges and having a'pair of ends each of which is connected to one 'of said depending side portions; a pawl member pivotally mounted 'at the entrance end of said drawing mechanism, said'top portion of said saddle member unit being formed with an opening passing therethrough and 'having an pairs of upper rollers located in the forward drawing field and connected bya shaft extending between said pairs 'of rollers, in combination, an elongated saddle member unit "having a U-shaped cross section so thatsaid unit comprises a pair of depending sideportions forming a space therebetween and having upper edges connected bya top portion of'said unit, the'said side portions having lower-edges distant'from said upper edges and havingparts thereof including said lower edges cut away so as to form spaced recesses in'one side portion located opposite to spaced recesses inthe'other' side portion, said recesses-extending upwardly from said lower edges, whereby" the shafts connecting the upper rollers may be located in said recesses of said saddle member unit, andsaidsaddle member 'unit having parts of said topoportion'bent up- "wardly therefrom so as to form holders for'clearer rollers; connecting means fixedly mounted on saidsaddle member unit for connecting the load for said upper rollers 'tosaid saddle memberunit, said last-mentioned "means, being immovably mounted on said saddle member unit, comprising a cross memberextendingacross said space between said depending portions of said saddle member unit, located between said upper and lower edges'andhaving a pairfof, endseaeh of which is connected to one of said depending's'ide portions; a pawl member pivotally mounted'at the entrance end of said drawing mechanism, said top portion of said saddlemember unit'being formed with. an opening passing therethrough and having'anedgewhich said pawl member engages so 'as to connectsaid saddle member unit to' said "drawing mechanism and so as'to permit the removal of said saddle member unit from said drawing mechanism; an elongated shaft member located in said saddle member and having the'hook forthe load on the saddle member connected theretojmeans'for connecting said elongated shaft :member to said "cross "member comprising a bifurcated element having the bifurcations thereof located on opposite sides of said cross member, the said bifurcated element being formed with an opening passing transversely therethrough and the said elongated shaft member extending through said last-mentioned opening; and means for fixedly connecting said bifurcated element to said elongated shaft member.

6. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by a shaft extending between said pairs of rollers, in combination, an elongated saddle member unit having a U-shaped cross section so that said unit comprises a pair of depending side portions forming a space therebetween and having upper edges connected by a top portion of said unit, the said side portions having lower edges distant from said upper edges and having parts thereof including said lower edges cut away so as to form spaced recesses in one side portion located opposite to spaced recesses in the other side portion, said recesses extending upwardly from said lower edges, whereby the shafts connecting the upper rollers may be located in said recesses of said saddle member unit, and said saddle mmeber unit having parts of said top portion bent upwardly therefrom so as to form holders for clearer rollers; connecting means fixedly mounted on said saddle member unit for connecting the load for said upper rollers to said saddle member unit, said last-mentioned means, being immovably mounted on said saddle member unit, comprising a cross member extending across said space between said depending portions of said saddle member unit, located between said upper and lower edges and having a pair of ends each of which is connected to one of said depending side portions; a pawl member pivotally mounted at the entrance end of said drawing mechanism, said top portion of said saddle member unit being formed with an opening passing therethrough and having an edge which said pawl member engages so as to connect said saddle member unit to said drawing mechanism and so as to permit the removal of said saddle member unit from said drawing mechanism; an elongated shaft member located in said saddle member and having. the hook for the load on the saddle member connected thereto, said shaft mem ber having a projection mounted at an end thereof; means for connecting said elongated shaft member to said cross member comprising a bifurcated element having the bifurcations thereof located on opposite sides of said cross member, the said bifurcated element being formed with an opening passing transversely therethrough and the said elongated shaft member extending through said last-mentioned opening; and means for fixedly connecting said bifurcated element to said elongated shaft member, comprising a threaded opening extending through a portion of said bifurcated element which overlies said shaft member and a screw member threadedly mounted in said threaded opening and bearing against said shaft member, said elongated shaft member being prevented from completely sliding through said opening passing transversely through said bifurcated element by contact of said projection thereof with said bifurcated element, and said bifurcated element extending upwardly from said cross member and toward said top portion of said saddle member unit so that it is adjacent to but slightly spaced 10 from said top portion of said saddle member unit, whereby said elongated shaft member and bifurcated element may be removed from said saddle member unit only after turning said bifurcated element and said shaft member therewith about said cross member.

7. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by a shaft extending between said pairs of rollers, in combination, an elongated saddle member unit having a U-shaped cross section so that said unit comprises a pair of depending side portions forming a space therebetween and having upper edges connected by a top portion of said unit, the said side portions having lower edges distant from said upper edges and having parts thereof including said lower edges cut away so as to form spaced recesses in one side portion located opposite to spaced recesses in the other side portion, said recesses extending upwardly from said lower edges, whereby the shafts connecting the upper rollers may be located in said recesses of said saddle member unit, and said saddle member unit having parts of said top portion bent upwardly therefrom so as to form holders for clearer rollers; connecting means fixedly mounted on said saddle member unit for connecting the load for said upper rollers to ,said saddle member unit, said last-mentioned means, being immovably mounted on said saddle member unit, comprising a cross member extending across said space between said depending portions of said saddle member unit, located between said upper and lower edges and having a pair of ends each of which is connected to one of said depending side portions; an elongated shaft member located in said saddle member and having the hook for the load on the saddle member connected thereto, said shaft member having a projection mounted at an end thereof; means for connecting said elongated shaft member to said cross member comprising a bifurcated element having the bifurcations thereof located on opposite sides of said cross member, the said bifurcated element being formed with an opening passing transversely therethrough and the said elongated shaft member extending through said lastmentioned opening; and means for fixedly connecting said bifurcated element to said elongated shaft member, comprising a threaded opening extending through a portion of said bifurcated element which overlies said shaft member and a screw member threadedly mounted in said threaded opening and bearing against said shaft member, said elongated shaft member being prevented from completely sliding through said opening passing transversely through said bifurcated element by contact of said projection thereof with said bifurcated element, and said bifurcated element extending upwardly from said cross member and toward said top portion of said saddle member unit so that it is adjacent to but slightly spaced from said top portion of said saddle member unit, whereby said elongated shaft member and bifurcated element may be'removed from said saddle member unit only after turning said bifurcated element and said shaft member therewith about said cross member.

8. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by a shaft extending between said pairs of rollers, in combination, an

elongated saddle member unit haying a U -shaped cross section so thatsaidunit comprises a ,pair.

of depending side portions forming a space therebetween and having upper edges connected-by a top portion of said unit, thevsaid side portions having lower edges distant from-said upper edges and having partsthereof including said lower edges cut away so asto form spaced-recesses in one side portion located opposite to spaced-re cesses in theother side portion, said recesses extending upwardly fromsaidlower edges, whereby the shafts connecting theupper rollers maybe located in said recesses of said saddle member means, being immovably mounted onsaidsaddle member unit, comprising across .member ex-. tending across said space between said depending portions of said saddle member. unit, located be..- tween said upper and. lower edges and. having a pair of ends each ofwhich is connected to one of said depending.sideportions; means for. connecting said saddle member .unit tosaid drawing mechanism in such a way that said saddle member may be removed from said-drawing mech-- anism and replaced'bya saddle member unit. of a difierent size than said'first mentionedsaddle member unit; and spring means mounted onsaid saddle member unit between said depending side portions thereof and embracing said shafts-oi said rollers for yieldably connecting said rollers to said saddle memberunit so that when'said unit is removed said rollers are carried therewith and so that said'rollers may easilybe removed from said saddle member unit by separating said rollers from said spring means.

9. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by ashaft extending between said pairs of rollers, incombinationan,

elongated saddle member unit having a U-shaped cross section so that said. unit comprises a ,pair of depending side portions forming a space therebetween and having upper edges connected by a top portion. of said unit, the said sideportions having lower. edges distant from said upper. edges and havingparts thereqf including said lower edges cut away so as to formspaced recesses in one side portion located opposite to. spaced re. cesses in the other side portion saidrecesses ex.. tending upwardly from saidlower edges, whereby the shaftsconnectingthe upper rollers maybe located i said recesses of said saddle member unit, the said saddle member ,unit being ,made of a resilient material, so that said. depending. side portions thereof, may be .yieldingly moved, toward each other, andthe said sideportions .yieldingly bearing against adjacent .sidespf said .pairs .of upper rollers, said, lower. edges adjacent to said recesses being bent outwardly .so that saidrollers are yielding ly maintained insaid saddle. member unit, and. said saddlememberunit having parts of .said-topv-portion bent upwardly therefrom so as to form holders for clearer rollers; connecting. means fixedly mounted on. said saddle member unit for connecting the load for said upper rollers to said saddle member unit, said last-mentioned means being .immovably mountedon said saddle member unit andcomprising .a cross member extending across said space between said depend- 12 ing portions of said saddle member. unit, located between said upper andloweredges and having a pair oi ends each-of Which is connected .to one of said depending side portions; and. means for.

connecting said saddle member unit to said drawing mechanism in such a wayithat said saddle.

member may be removed from said drawing mechanism and replaced by a saddle member unit of a different size thansaid firstmentioned saddle member unit.

0-; I dr v amecb eism r n n chines, having clearer rollers and saddle-loaded pairs of upper rollere located in; the forward drawing fieldand connected by a shaft extending between said pairs of rollers, incombination, an elongated saddle member unit having a U-shaped cross section so that said-unitcomprisesa pair of depending sideportions forming a space therebetween and having upper edges connected by a top portion of said unit, the said-sideportions havinglower edgesdistant. fromsaid upper edges and having parts thereof including said lower edges .cut, away .soas to, form,spaced,recesses in one side portionlocated oppositentov spaced re: cesses in the other side portion, said recesses extending upwardly .fromsaid-lower edges, .whereby the shafts connecting the. upper rollers may be.

locatedmin said recesses .of said. saddle .member unit, and said saddleinember unit having parts of said. .top .portion. bent upwardly therefrom, so. as to form holders .for clearer rollers; connecting.

means fixedly rmounted on said. saddlemember. unit for connecting theload forsaidlupper rollers to said saddle member. unit, saidlast-mentioned meam, being immovably mountedon said saddle member unit, comprising across member extending across-said space between'said depending-portions ofsaid saddle member unit, locatedbetween said upper and lower edges and having a -pair of ends eachv ofwhiclr isconnected -to one of .saiddepending side portions; means for connecting said saddle mem-ber unit to saiddrawing mechanism-insuch-a way'that said saddle member may be removed from said drawing mechanism and replaced by a saddle member-unit of a different size than-- said I first -mentionedsaddle member unit; spring means mounted onsaid saddle member unit between said depending side portions thereof and embracing said shafts of said rollers for yieldably connecting said rollers to said saddle member unit so that when said unit is removed said rollers are carried therewith and so that said rollers may easilybe removed from said saddle member unit by separatingsaid rollers from s'aid spring means; an elongated 'shaftmember located insaid saddle member and having thehook for he l a n. h ddl em e onne e thereto, said. shaft; meznber having a projection o n e at ne t reo e n v nne t n a e o eat ds a t mem e to sai cr m mber comprising abifurcated element, having the bifurcation thereof located on opposite sides of said cross member, the said. bifurcatedelement being formed w i th an opening passingvtransversely therethrough andthe saidelongated. shaft member. extendin through, said. last-mentioned openin and Ineans for,fixed1y connectingsaid bifurcated elementto said elongatedshaft mem. ber,, comprising a threaded, opening extending through a portion ofsaid bifurcated, element which overlies .said. shaft .member and a screw memberv threadedly, mounted. in. said I threaded opening and. bearing against said shaft member, saidelongated shaft member being. prevented from completely sliding through said opening passing transversely through said bifurcated element by contact of said projection thereof with said bifurcated element, and said bifurcated element extending upwardly from said cross member and toward said top portion of said saddle member unit so that it is adjacent to but slightly spaced from said top portion of said saddle member unit, whereby said elongated shaft member and bifurcated element may be removed from said saddle member unit only after turning said bifurcated element and said shaft member therewith about said cross member.

11. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by a shaft extending between said pairs of rollers, in combination, an elongated saddle member unit having a U-shaped cross section so that said unit comprises a pair of depending side portions forming a space therebetween and having upper edges connected by a top portion of said unit, the said side portions having lower edges distant from said upper edges and having parts thereof including said lower edges cut away so as to form spaced recesses in one side portion located opposite to spaced reoesses in the other side portion, said recesses extending upwardly from said lower edges, whereby the shafts connecting the upper rollers may be located in said recesses of said saddle member unit, and said saddle member unit having parts of said top portion bent upwardly therefrom so as to form holders for clearer rollers; connecting means fixedly mounted on said saddle member unit for connecting the load for said upper roll erstosaidsaddle member unit, said last-mentioned means being immovably mounted on said saddle member unit and comprising a cross member extending across said space between said depending portions of said saddle member unit, located between said upper and lower edges and having a pair of ends each of which is connected to one of said depending side portions; spring means mounted on said saddle member unit between said depending side portions thereof and embracme said shafts of said rollers for yieldably connecting said rollers to said saddle member unit so that when said unit is removed said rollers are carried therewith and so that said rollers may easily be removed from said saddle member unit by separating said rollers from said spring means; an elongated shaft member located in said saddle member and having the hook for the load on the saddle member connected thereto, said shaft member having a projection mounted at an end thereof; means for connecting said elongated shaft member to said cross member comprising a bifurcated element having the bifurcations thereof located on opposite sides of said cross member, the said bifurcated element being formed with an opening passing transversely therethrough and the said elongated shaft member extending through said last-mentioned opening; means for fixedly connecting said bifurcated element to said elongated shaft member, comprising a threaded opening extending through a portion of said bi furcated element which overlies said shaft member and a screw member threadedly mounted in said threaded opening and bearing against said shaft member, said elongated shaft member being prevented from completely sliding through said opening passing transversely through said bifurcated element by contact of said projection thereof with said bifurcated element, and said bifurcated element extendin upwardly from said cross member unit so that it is adjacent to but slightly spaced from said top portion of said saddle member unit, whereby said elongated shaft member and bifurcated element may be removed from said saddle member unit only after turning said bifurcated element and said shaft member therewith about said cross member; and a pawl member pivotally mounted at the entrance end of said drawing mechanism, said top portion of said saddle member unit being formed with an opening passing therethrough and having an edge which said pawl member engages so as to connect said saddle member unit to said drawing mechanism and so a to permit the removal of said saddle member unit from said drawing mechanism.

12. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by a shaft extending between said pairs of rollers, in combination, an elongated saddle member unit having a U-shaped cross section so that said unit comprises a pair of dependin side portions forming a space therebetween and having upper edges connected by a top portion of said unit, the said side portions having lower edges distant from said upper edges and having parts thereof including said lower edges cut away so as to form spaced recesses in one side portion located opposite to spaced recesses in the other side portion, said recesses extending upwardly from said lower edges, whereby the shafts connecting the upper rollers may be located in said recesses of said saddle member unit, the said saddle member unit being made of a resilient material so that said depending side portions thereof may be yieldingl moved toward each other, and the said side portions yieldingly bearing against adjacent sides of said pairs of upper rollers, said lower edges adjacent to said recesses being bent outwardly so that said rollers are yieldingly maintained in said saddle member unit, and said saddle member unit having parts of said top portion bent upwardly therefrom so as to form holders for clearer rollers; connecting means fixedly mounted on said saddle member unit for connecting the load for said upper rollers to said saddle member unit, said last-mentioned means, being immovably mounted on said saddle member unit, comprising a cross member extending across said space between said depending portions of said saddle member unit, located between said upper andlower edges and having a pair of ends each of which is connected to one of said depending side portions; means for connecting said saddle member unit to said drawing mechanism in such a way that said saddle member may be removed from said drawing mechanism and replaced by a saddle member unit of a different size than said first mentioned saddle member unit; an elongated shaft member located in said saddle member and having the hook for the load on the saddle member connected thereto, said shaft member having a projection mounted at an end thereof; means for connecting said elongated shaft member to said cross member comprising a bifurcated element having the bi furcations thereof located on opposite sides of said cross member, the said bifurcated element being formed with an opening passing transversely therethrough and the said elongated shaft member extending through said last-mentioned opening; and means for fixedly connecting said bifurcated element to said elongated shaft member, comprising a threaded opening extending through a portion of said bifurcated element which overlies said shaft member and a screw member threadedly mounted in said threaded opening and bearing against said. shaft member, said elongated shaft member being prevented from completely sliding through said opening passing transversely through said bifurcated element by contact of said projection thereof with said bifurcated element, and said bifurcated element extendin upwardly from said cross member and toward said top portion of said saddle member unit so that it is adjacent to but slightly spaced from said top portion of said saddle member unit, whereby said elongated shaft member and bifurcated element may be removed from said saddle member unit only after turning said bifurcated element and said shaft member therewith about said cross member.

13. In a drawing mechanism for spinning machines having clearer rollers and saddle-loaded pairs of upper rollers located in the forward drawing field and connected by a shaft extending between said pairs of rollers, in combination, an elongated saddle member unit having a U-shaped cross section so that said unit comprises a pair of depending side portions forming a space therebetween and having upper edges connected by a top portion of said unit, the said side portions having lower edges distant from aid upper edges and having parts thereof including said lower edges cut away so as to form spaced recesses in one side portion located opposite to spaced recesses in'the other side portion, said recesses extending upwardly from said lower edges, Whereby the shafts connecting the upper rollers may be located in said recesses of said saddle member unit, the said saddle member unit being made of a resilient material so that said depending side portions thereof may be yieldingly moved toward each other, and the said side portions yieldingly bearing against adjacent sides of said pairs of upper rollers, said lower edges adjacent to said recesses being bent outwardly so that said rollers are yieldingly maintained in said saddle member 7 of said depending-side portions; an elongated shaft member located'in said saddle member andhaving the hook for the load onthe saddle member connected thereto, said shaft member having' a projection mounted at an end thereof; means for connecting saidelongated shaft member to said cross member comprising a bifurcated element having the bifurcations thereof located on opposite sides of said cross member, the said bifurcated element being formed with an opening passing transversely therethrough and the said elongated shaft member extending through said last-mentioned opening; means for fixedly connecting said bifurcated element to said elongated shaft member, comprising a threaded opening extending though a portion of said bifurcated element which overlies said shaft member and a screw member threadedly mounted in said threaded opening and bearing against said shaft member, said elongated shaft member bein prevented from completely sliding through said opening passing transversely through said bifurcated'element by contact of said projection thereof with said bifurcated element, and said bifurcated element extending upwardly from said cross member and toward said top portion of said saddle member unit so that it is adjacent to but slighly spaced from said top portion of said saddle member unit, whereby said elongated shaft member and bifurcated element may be removed from said saddle member unit only after turning said bifurcated element and said shaft member therewith about said cross member; and a pawl member pivotally mounted at the entrance end of said drawing mechanism, said top portion of said saddle member unit being formed with an opening passing therethrough and having an edge which said pawl member engages so as to connect said saddle member unit to said drawing mechanism and so as to permit the removal of said saddle member unit from said drawing mechanism.

WILHELM STAHLECKER.

REFERENCES CITED The followingreferences are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 411,388 Meats Sept. 17, 1889 1,944,965 Casablancas Jan. 30,1934 2,246,474 Stahlecker June 1'7, 1941' 2,353,333 Hess July 11, 1944 2,359,820 Solanas Oct. 10, 1944

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