US2417485A - Mounting for textile mill spindles - Google Patents

Description

March 18, 1947.

H. GLEITZ ET AL MOUNTING FOR TEXTILE MILL SPINDLES Filed April 18, 1.945

LIGHT weacur METAL s ALUMINUM) 2 Sheets-Sheet l PA UL 965 964 965 Fag-1 l N v ENTO Rs H E R BE RT GLE frz CHARLE s EJVIILLER I. 'FHvR E EN ATTORNEY March 18, 1947. H n-z ET AL 2,417,485

MOUNTING FOR TEXTILE MILL SPINDLES Filed April 18, 1945 2 Sheets-Sheet 2 lNVENToRs:

HERBER G LEITZ CHARLES E, MILLER Patented Mar. 18,1947

UNITED STATES PATENT OFFICE MOUNTING FOR TEXTILEMILL SPINDLES Application April 18, 1945, Serial No. 589,010

9 Claims.

This invention relates to a spindle such as used in textile mills, as for spinning or twisting.

Textile mill spindles have been very highly developed and recent improvements made at the instance of the assignee hereof in anti-friction bolster bearing constructions and resiliently mounted footstep bearings have permitted increases in loading, speed of operation, and life of the unit, Increased speeds and loading have demanded improvements in brake design to provide adequate braking forces without complication of construction. Prior brake structures which have provided the necessary braking forces have not only been relatively expensive, but the operating mechanisms thereof have been subject to occasional failures and have not been as positive in operation as is desired. The cost of high speed spindles has been greatly reduced by forming the bolster case of seamless steel tubing and rigidly securing a main mounting and brake supporting flange thereto, However, further room for improvement was found to exist both in the manner of making such flange and in the manner of attachment thereof to the bolster case. Reduction in the cost of the bolster case has caused the blade to assume a disproportionate share of the cost of the completed spindle, and need has therefore arisen to simplify the method of blade manufacture as well as to render the brake and its supporting structure less expensive while at the same time improving as a Whole both the construction and operation of the spindle assembly.

The present invention provides an improved textile mill spindle having all of the advantages of present spindles, and particularly those possessed by the spindle construction described in United States Patent No. 2,351,951, issued June 20, 1944, to Herbert Gleitz and in the copending application of Herman H. Brooksieker and Paul I. Thyreen, filed June 21, 1944, as Serial No. 541,420. The invention also includes an improved bobbin or spool adapter which latter eliminates many disadvantages heretofore considered inherent and which enables the use of a shorter and consequently less costly blade. The spindle of the present invention further comprises an improved and simplified internal brake mechanism capable of exerting the maximum desired braking forces quickly, although gradually, with great uniformity of bearing loading; an improved means for effecting braking force application and release; an improved manner of securing a bolster bearing in place; a novel mounting structure for the brake and the whorl hook, and certain improvements relating to the footstep bearing.

The improvement in internal spindle brakes relates to the operating mechanism including a manual control lever and mechanism disposed between the lever and a pair of outwardly expandable shoes whereby the braking forces are uniformly distributed andmore quickly and positively released, and the entire mechanism rendered less subject to binding and rapid wear. A novel main mounting flange or collar, which also supports the brake (when used) and/or the whorl hook and driving band guide and usually an oiling fitting, is of a simplified construction which reduces many of the machining and drilling operations required in the manufacture of spindle mounting flanges or collars and thus eliminates the need for several costly fixtures and makes possible more rapid manufacture. The bobbin or spool adapter for the spindle herein described is made of aluminum or metal of the same type as aluminum instead of wood, as in conventional practice and not only possesses all of the advantages naturally to be expected from such change but also possesses many unexpected advantages which contribute to better operation as well as lower manufacturing and maintenance cost.

An object of this invention is to provide a spindle having the foregoing advantages and features.

Another object is to provide an improved internal braking mechanism for textile mill spindles which mechanism is economical in construction, wherein the braking force is uniformly distributed over the entire brake shoe area and whereby brake application and release are made more certain of rapid accomplishment.

A further object is to provide an improved collar or mounting flange construction for a textile mill spindle.

Another object is to provide a composite collar or mounting flange construction for a textile mill spindle in which complemental parts are formed by a simple punching and coining operation from sheet stock.

A still further object is to provide an improved bolster bearing construction in which rollers are used, and specifically a new manner of securing the bearing assembly against dislocation and undesirable tampering.

A further object is to provide an improved footstep bearing and support and centering means therefor in a bolstercase.

Other objects include the provision of a light metal adapter for cooperation with a spindle blade and bobbin, and the provision of a support- Fig. 1a is an enlarged sectional view of a footstep centering spring assembly with the spring in an abnormally unstressed condition;

Fig. 2 is a view illustrating two finished sections from which the spindle blade is formed by weldins;

Fig. 3 is a fragmentary view corresponding to the central portion of Fig. 1 showing a different (larger) type of spindle embodying the brake mechanism; t I

Fig. 4 is a cross sectional view taken generally at 4-4 on Fig. 3; y I

Fig. 5 is a central sectional perspective view of one of the two collar or mounting fiangesections according to Fig.3; f v

Fig. 6 is a sectional plan view of the spindle according to Fig. 3 showing an improvedmanner of securing the bolster bearing assembly in place in the bolster case; and I v Fig. 7 is a fragmentary planview showing a modified brake operating lever.

General construction In Fig. 1, showing the, simpler form of spindle hereof, a bolster case I0, preferably formed of seamless steel tubing, has an upper portion ll containing a bolster bearing assembly 12 and a lower portion I4 containing a footstep bearing l5. Rotatably supported by the bearings I2 and I5 is a spindle shaft or blade l6 comprising an 'upper, bobbin-supporting and drive-connection portion l8 extending through and upwardly from a driving whorl l9 and a coaxial lower bearingengaging portion 20 extending downwardly from .the whorl and into the footstep bearing I5. The

portion l8 has lower cylindrical portions 2| and 22 of two'different diameters, upon the larger diameter 2| of which the whorl is press or shrink fitted, and an upwardly tapered end portion received in a complementary socket 23a of the bobbin or spool adapter 23 to be described later. The lower portion 20 is tapered downwardly for its entire length and has a conical tip 24 at its lower end within the footstep.

Blade The blade [6 is preferably made in accordance with the disclosure of the application of Herbert Gleitz et 8.1., Serial No. 592,868, filed May 9, l945. The same blade construction in one form is shown herein particularly by Figs. 1 and 2. The blade as shown comprises separate blade sections I81: and 20a, Fig. 2, having larger diameter cylindrical portions 2 la and 2 I b constituting the single cylindrical portion 2| in the finished blade. The sections can be made advantageously on an automatic screw machine and later joined along the cut-off faces I811 and 2011 to form the joint 25, Fig. 1, as by electrical resistance butt welding.

Blade (continued) and adapter Although the blade l6 as shown in Fig. 1 is shorter than those commonly used in the type of spindle illustrated, it is to be understood that the foregoing described construction may be used for blades of any length. Fig. 3 illustrates, in part, the type of spindle construction employing a longer blade. The shortness of the blade it of Fig. 1 is enabled by the novel adapter 23 which in the type of spindle shown is preferably joined to the blade or at least so fitted thereto as always to rotate therewith.

The adapter 23 which, for example, may enter and fit the central opening of a tubular fiber or paper thread bobbin (not shown) comprises a slightly tapered sleeve formed of aluminum or suitable aluminum alloy or magnesium having the tapered axial socket 23a extending upwardly from the lower or larger end face to approximately the mid-portion of the sleeve. The socket 23a receives the tapered part of the upper portion [-8 of the blade l6, and the lower end face of the adapter ordinarily rests on the upper face of the whorl IS. A tight fit between the adapter and the blade 1-6 is preferably accomplished by a shrink fit operation which may comprise first chilling the blade IE to reduce its diameter, in-

,serting; the blade into the socket 23a, and then lIn addition, the aluminum or light metal adapter weighs no more than the hard wood currently used and permits a positive driving fit to be made between the adapter and blade without the use of keys, pins or other fasteners.

Blade (cont nued) and whorl The whorl H! has a hub portion 28 (compare Figs. 1 and 3) fixed to the blade l6 as by a pressfitting upon the cylindrical portion 2| .of the blade. When the blade is made in accordance with application Serial No. 592,868, advantage is taken of the press fitting between the blade and whorl to conceal the weld and assist in holding the two blade portions in alignment. The joint 25 as shown in Figs. 1 and 3 lies approximately centrally between the effective ends of the hub.

A lower part 29 of the whorl surrounds the portion ll of the bolster case (free therefrom), and may have an approximately cylindrical but barrel-shaped surface 30 for engaging a driving belt or band (not shown). Below the surface 30, the whorl has an enlarged reinforcing and band supporting rim or flange portion 3|, the inner cylindrical face of which, as shown only in Figs. 3 and 4, constitutes an internal braking surface 32 for cooperation with shoes of a brake mechanism described below.

M oant'ing flange and brake The lower part of the portion ll of the bolster case [0 is received within aligned openings 36 in substantially identical top and bottom sections 38a and 38b of a composite flange or collar 38 which serves as a supporting means for the bolster case and mounts the brake mechanism and a whorl hook and band retainer 34. The flange sections 38a and 38b are integrally joined together for example by spot welding (not shown) or by brazing (described later) with their complemental face surfaces 48 in face to face contact thus in effect forming an integral flange or spindle collar structure.

Each of the sections 38a and 38b is preferably formed by a blanking operation from suitable plate or strip stock and has a body portion 4| (Figs. 3, 4, and 5) with curved or obtusely directed end faces 4|a extending to a lateral projection or tongue 42 and an opposing end face 4|b which is curved as shown. The projection 42 in each instance has a. longitudinal slot 45 having parallel side walls, and a slot 46 formed in the opposite edge portion of the body 4| has inwardly diverging side walls 46a. Also diametrically aligned with the opening 36 and having parallel side walls which intersect the peripheral wall of the opening is a slot 41. The opening 36 and the slots 45, 46 and 41 may be formed by a punching operation e. g. simultaneously with blanking of the body from the strip, and a subsequent coining operation may provide at the face 48 a chamfered surface 36a around the peripheral edge of the opening 36 as well as oblique, chamfers 48 (one shown in Fig. 5) at the intersection of the walls 46a and the respective main faces 48 of each section.

Also formed in the surface 48 of each of the sections 3811 and 38b and preferably by a coining or similar operation are aligned hemicylindrical, transverse grooves 49 intersecting the respective slots 46 near their inner end walls. A similar pair of grooves 58 are formed in the face 46 of each section intersecting the slot 45 of the extension arms 42. When the sections 38a and 38b are secured together, in a manner to be described and as shown in Fig. 3, the complemental pairs of grooves 49 and 50 in the respective faces 48 define interrupted, and respectively aligned cylindrical, transverse pinreceiving openings 52 and 53. Additional recesses or grooves 5| (Fig. 5) may be coined or stamped in each section to form, after assembly of the sections, the cylindrical opening 54 (Figs. 3 and 4) radial with respect to the aligned bolster-case-receiving openings 36. The opening 54, however, is rather large for such formation and usually is formed by drilling and counterboring after assembly of the flange 38 onto the bolster case. As indicated on Figs. 1 and 3, the chamfered surfaces 36a define an annular V- shaped groove 55 intermediate th outer ends of the aligned opening 36, and the chamfered surfaces 48 define opposed V-shaped notches 56. Additionally, the sections 38a and 3812 are provided with punched openings 58a and 58b, respectively, which are located between the respective openings 36 and the slots 46 and which constitute the only difference between the two sections. The opening 58a as shown is somewhat larger than the opening 58b.

From the foregoing it is seen that the composite collar or mounting flange 38 is completely formed without recourse to costly and timeconsuming machining and drilling operations. This is of particular importance because the accurate drilling of an interrupted opening such as the opening 52 is an extremely complicated operation requiring skillful machine operation and a costly fixture, and the forming of a groove such as the groove 55 in a one-piece flange or collar would obviously require an expensive boring operation after th bolster-case-receiving opening has been drilled.

In the case of the flange 38 of Fig. 1 the two sections 38a and 381) are exactly alike. The

threaded opening which receives the oiling fitting L and conducts lubricant therefrom to the bolster case as illustrated in Fig. 1 is preferably drilled and tapped after assembly of the flange on the bolster case but even that opening can be partly coined.

Although the preferred method of forming the sections 38a and 38b of the flange 38 is described herein as comprising stamping, punching, and coining operations, it is to be understood that this invention extends to the novelty of forming a spindle flange or collar in two separate sections and then joining them as by copper brazing into what is in effect an integral structure; and is not to be limited to the use of the precise manufacturing methods above described.

Brazing, as used herein The above references to brazing and. those given below contemplate fusion of the joined metal parts together so that those parts become in effect integral. Such operation and function cannot be accomplished by the silver solder methods described in application Serial No. 541,240, identified above. Silver solder alloys usually fuse at around 1300 F. or lower. Copper and copper brazing alloys fuse at 2100 F. and at higher temperatures at which molecular surface changes are believed to occur on most steels such that actual fusion of the joined steel surfaces take place during the brazing operation. A further difference is that solder of all types when used to join ferrous metals requires space in which to operate. Press fitted and shrink fitted generally smooth ferrous parts cannot be made more secure by soldering because the solder cannot penetrate the spaces actually left between ferrous parts so fitted together whereas copper braze will penetrate and fuse the parts. The brazing operations in accordance herewith can be accomplished by heating the assembled parts by induction, by immersion in a fused salt bath and in a controlled atmosphere furnace (substantially non-oxidizing atmosphere).

Whorl hook and mounting The whorl hook 34 (Figs. 1, 3 and 4) serves as a, temporary driving band support in two positions and comprises a cylindrical spring wire bent into a U-shape. The upper or bight end portion 59, Figs. 3 and 4, of the hook is reversably bent upon the remainder of th wire (free therefrom) and intermediate portions of the legs are offset in the same direction as the portion 59 by angularly disposed portions 68. The extreme lower or free end portions 6| of the opposing legs are bent outwardly in axial alignment but in opposite directions and are rotatably received respectively in the spaced portions of the interrupted cylindrical opening 52 defined by the complemental grooves 49 in the sections 38a and 38b. The hook 34 is preferably mounted upon the flange 38 by forcing the leg portions of the hook toward each other and thus inserting the outwardly bent end portions 6| into respective portions of the opening 52 of the flange. Alternatively, the outwardly bent leg portions 6| can be placed in the interrupted grooves 49 in one of the two flange sections 38a and 381) before bringing the sections together in face to face contact as above described and welded or otherwise secured into a right flange unit.

In order to disconnect the spindles from the driving band at times it is of advantage to be able to move the belt or band (not shown) away from the surface 30 and to retain it in its removed position. The hook 34 as shown may be rotated counterclockwise to an intermediate position shown by broken line 62 (Figs. 3 and 4), and to extreme lower position (not ordinarily used) indicated, in Fig. 3, by the broken lines 64. The inwardly diverging walls 46a releasably but strongly hold the hook 34 in the normal operating position shown by solid lines in each of Figs. 1 and 3. When the whorl hook is moved to the horizontal position 62, the opposing legs are bent inwardly toward each other by camming action of the walls 46a, and when the position 62 is reached the legs spring outwardly into the respective V-shaped notches defined by the chamfered surfaces 48. Thus the hook does not have to be supported by the spindle rail, as usually is the case, in order to be retained in a horizontal position.

Bolster case-further features As shown in Fig. l, the flange or collar 38 is clamped against the top side of the usual fixed spindle rail R as by a suitable nut 65 and washer 66, the nut fitting threads 6'! formed on the portion l4 of the case. The brazed joint between the collar and case is provided by inserting a wire or strip of brazing alloy (e. g. copper) in the annular groove 55 defined by the opposing chamfers 36a, sliding or pressing the collar 38 into position; heating the assembly as previously described, causing the brazing metal to flow throughout the space between the collar and case as well as between the faces 40 of the flange sections 38a and 38b, and then cooling the assembly. The portion of the brazing alloy caused to flow between the faces 40 is sufficient to hold the sections 38a ad 38b integrally together in event they have not been previously brazed or welded to join them into a self-sustaining subassembly as may sometimes be practiced.

Attention is called to the fact that, in Fig. 1, there is no shoulder on the upper non-threaded part of the bolster case against which the composite flange or collar 38 abuts. That surface can be and usually is the original cylindrical unturned surface of the bar or tube stock from which the bolster case is formed. The abutment shoulder in the construction according to Fig. 3 is mainly to definitely locate the operating parts of the brake with reference to the position of the brake shoes I (described later). Formation of the threads 61 in any case can be reduced in cost by rolling instead of cutting or grinding.

Bolster bearing and staked-in retainer cap The bolster and footstep bearings l2 and I5, Fig. 1, may be of any suitable type but are shown to be and preferably are very similar to those described and claimed in the previously identified patent and copending application. Considering the bolster bearing [2, the reduced lower end portion 22 of the blade I6 extends for some distance downwardly from the whorl hub 28 and serves as the inner race surface in respect to a set of rollers 68, Figs. 3 and 6, preferably bearing directly on the inner polished surface of a tubular member 69 received in a counterbore of the bolster case I8. The member 69 is clamped between a ring or collar H which is press-fitted into the counterbore against the bottom thereof and a top cap '12 which is pressed or shrink fitted into the upper end portion of th counterbore. The lower end faces of the rollers 68 rest on the smooth upper surface of th collar H. A roller retaining and spacing cage 14 formed of a cylindrically shaped (curled up) strip of sheet metal and having roller-receiving, vertically disposed slots 15 defined by radially inwardly converging surfaces of the slots hold the rollers against inward movement toward the axis of the bolster case when the spindle blade is removed.

The roller retainer or cage 14 freely occupies the space horizontally between the race forming inner wall surface of the member 69 and the race portion of the blade I6.

The upper end portion of the cage 14 is received loosely within a counterbore 19 of the top cap 12. The outer marginal area of the lower end face of the top cap bears against the member 69 and the inner marginal area serves to limit upward travel of the rollers 68 to a very slight movement To avoid expensive threading operations, to avoid application of heat incident to welding such, as might damage the bearing race surfaces or those of the rollers and to make the rollers etc. removable and replaceable for authorized service, the top cap is simply staked into place by a series of punch indentations 13, Figs. 3 and 6, in the top of the bolster case. The indentations cause small portions 13a of the bolster case metal to overhand and force against the outer rim portion of the top cap as will be clearly apparent, The staking indentations are done simultaneously by a suitable gang punch operation in a press. When replacement of bearing parts becomes necessary the portions 13a are cut away; and later the re-staking is done in new positions around the rim of the bolster case. A completely turned in flange such as previously proposed on bolster bearing retainer caps cannot be removed and replaced as a practical matter usually because the turned in flange is destroyed in removing it.

Footstep bearing Referring to the footstep bearing l5, the body 8| thereof is appropriately bored and polished at 82 and 84 to receive respectively the tapered portion and the conical tip end 24 of the spindle blade, the latter'and the tapered hole being in close running fit at the lower part of the blade. The body 8| is held against turning by, for example, a diametrally extending slot 85 formed on its lower face and loosely receiving a complementary cross tongue 81 formed on the upper face of a closure plug 86. The plug has an axial hole 89 in its upper face providing a sludge sump, and the hole divides the tongue 81 into two parts.

The plug 86 is high wear resisting metal, preferably Nitralloy or other metal that will adequately resist damage when the bolster case and plug assembly is subject to the brazing temperature. The brazing metal or alloy, e. g. copper strip of wire is placed prior to assembly in an annular groove 9| formed in the peripheral surface of the plug close to the lower end face of the bolster case. After the plug is properly positioned, being limited during press or shrink fitting by a precision formed mandrel temporarily placed inside the main bore of the bolster case and shouldered against the bolster bearing support counterbore, the footstep plug and bolster case are heated to fuse the brazing metal which flows between the bolster case and plug where it virtually fuses the plug rigidly in position and fills any space which might enable oil leakage. .An annular groove 94 provided near the top of the plug 86 effectively prevents the brazing metal from flowing to the cross slots which receive the projections 85.

The centering means for the footstep body 8| comprises a plurality of radially guided buttons 95 biased outwardly by respective calibrated coil springs 96, one of which is shown in non-stressed condition in Fig. 1a. The spring 96, as shown, is of hour glass shape having small central coils 96a and gradually increased diameter coils 961) at both ends. The adjacent coils 961) are so related to each other and two of the coils 96a are so related to adjacent coils 961) that the coils nest or radially overlap whereby a considerable number of coils of fairly strong spring wire can be used in the rather small space allowed for accommodating the spring. The enlargement of the coils at both ends of the spring assists greatly in preventing the spring from becoming skewed in position during assembly and in service.

Spindle brake (continued) The brake as shown in Figs. 3 and 4 comprises two identical arcuate shoe members I slidably received in a shallow, annular groove in the bolster case opposite the flange portion 3| of the whorl I9. One pair of spaced, non-radial (inwardly converging) end faces IOI (Fig. 4) of the shoes I00 are slidably disposed on opposite sides of a fixed cylindrical pin I02, and the other similar pair I04 of inwardly converging end faces are likewise disposed on opposite sides of a reduced head portion I05 of a brake operator or pin I06 having an inwardly directed, hemi-cylindrical face surface I 08. The shoes I00 are formed of substantially rigid friction material. as in the above mentioned application, and are normally pressed inwardly into non-braking position by a C-shaped spring wire I09 which lies in a groove I I0 formed in the outer peripheral surface of the shoes and extending around the entire periphery of the two shoes. The pin I02 which is cut away at II I to provide clearance for the spring, and is secured as by a press fit into the opening 580. in the mounting flange section 38a and rests on an annuar shoulder defined by the aligned openings 58a and 58b which latter opening provides space for a tool such as may be used to drive the pin I02 out in servicing the brake. The lower body portion of the operator pin I06 is slidably received in the aligned slots 41 of the flange sections and has a threaded socket which receives a complementary, reduced threaded inner end portion of a pin I I2. The pin I I2 is slidably received in the opening 54 and has an outer terminal flange I I4 between which and the inner transverse wall surface of the slots 41 a compression coil spring H5 is disposed. As shown, the spring surrounds the shank of the pin 2 and biases the pin outwardly to a released position of the brake. The pin I I2 is moved inwardly against the bias of the spring II5 by generally circular cam surfaces I I6 of a generally channel-shaped manual lever II8 pivoted near its upper end on a pin I I9 received in the opening 53. Movement of the pin H2 inwardly moves the pin I06 inwardly to force the end portions of the shoes I00 which lie adjacent the end faces I04 outwardly against the braking surface 32, and, concurrently, the opposite ends of the shoes I00 are forced against the surface 32 with equal force as the end faces IOI slide on the pin I02.

The cam surfaces II6 as shown in Figs. 3 and 4 are formed on the edge surfaces of side walls I of the lever H0 at the upper end portion thereof near the pivot, the lever II8 having a curved bight portion I2I and having its side walls I20 below the cam surfaces curled inwardly as at I22. If desired a lever I24 partially shown in Fig. 7 may be used instead of the lever H8. The lever I24 is pivoted in the same manner as the lever H8 and is also channel-shaped, but is in a relatively reversed position and has the upper end part of its bight portion I25 curved to define a cam surface I26 which functions as do the paired cam surfaces II6 on the head of the pin Positive releasing action of the brake operating mechanism is assured because the spring wire I09 need only exert sufiicient force to move the shoes I00 to brake-released position, the other moving parts of the brake mechanism being returned to brake-released position by the spring II5.

Lubricator For lubrication of the spindle shown in Fig. 1, a sufiicient volume of oil is preferably introduced into the bolster case as through an oil gland or nipple L on the collar 38, previously referred to, so that the portion of the blade above the footstep bearing is maintained immersed. As the oil level recedes, enough oil for lubrication of the bolster bearing climbs the slightly tapered portion of the blade portion 20. Common practice is to introduce oil into a similar bolster case of spindles not provided with brakes through a nipple on a case-supporting collar. The improved oiling collar and mounting flange of Fig. 1 is constructed in a manner similar to the flange 3B of Fig. 3 so as to permit the advantages and economics of coining operations to be realized. The sections 38a and 38b of Fig. 1 are essentially the same as those of Fig. 3 except that no provision for supporting a brake is made. It will be apparent that the flange 38 of Fig. 3 can be provided with an oiler the same as is the corresponding flange of Fig. 1. The partially threaded opening I35 which align-s with and opens into a radial bore I36 of the bolster case l0 to form an oil duct can, as previously stated, be partially coined into the matching sections 38a and 38b although it is not believed practical to coin the threads in that manner.

Reference is directed to the following co-pending applications claiming subject matter originally disclosed by this case: Herbert Gleitz et al., Serial No. 638,944, filed January 4, 1946, entitled Method of making textile spindle elements; Herbert Gleitz et al., Serial No. 647,721, filed February 15, 1946, entitled Spindles for textile mill use; and Herbert Gleitz et al., Serial No. 647,722, filed February 15, 1946, entitled Spindle-s for textile mill use.

We claim:

1. In a mounting flange construction for a textile mill spindle, a pair of substantially identical flange sections, each having a central opening and a substantially planar face surface, complemental cavities on said face surfaces, respectively, and means securing said sections together with said face surfaces in face to face contact and said cavities in complemental relation.

2. In a flange construction for a textile mill spindle, a pair of substantially identical flange sections, each having a central opening and a substantially planar face surface, chamfers formed about the periphery of said openings at said face surfaces, respectively, and means securing said sections together with said face surfaces in face to face contact and said openings in axial alignment, whereby said chamfers define a groove about the peripheral wall of said aligned openings.

3. A flange construction in accordance with 11 claim 2 characterized in that said chamfers are die formed depressed in said face surfaces, respectively.

4. In combination, a bolster case adapted to be turned from metal bar stock, and a mounting flange for the bolster case having an opening tightly fitting the bolster case and fused to the case by relatively high melting point brazing metal..

5. In a textile mill spindle, a pair of substantially identical flange sections having respective face surfaces in face to face engagement, bolster case-receiving, aligned openings in said sections, alignedjslots in said sections, respectively, complemental grooves in said face surfaces, respectively, transverse to and intersecting said slots, respectively, said aligned slots being adapted to receive and support a brake-operating lever, and said complemental grooves being adapted to receive and support a pivot for such lever.

6. In a textile mill spindle, a bolster case having a mounting flange and bearings for ablade, a blade having a whorl, said blade and whorl being removably carried by the bearings, a slot extending into one edge of the flange and having side walls diverging inwardly from said edge toward the bolster axis, aligned openings intersecting the side walls of the slot, a whorl hook of spring material with shank portion pivotally engaging said aligned openings-respectively, and recesses in said side walls positioned for spring engagement with shank portions of the hook when the hook is in a generally horizontal position.

7. A bolster case for a textile mill spindle comprising a central hollow metal body adaptedto support a spindle blade for rotation and a bodysupporting flange comprising a pair of sheet metal stampings with mutually registering apertures arranged to receive said body, means rigidly joining the two stampings together in face to face relationship, and means joining the resulting flange unit to the body adjacent the apertures.

8. A bolster case for a textile mill spindle assembly, said case comprising a central hollow metal body adapted to support a spindle blade for rotation, and a body-supporting flange comprising separate laminated metal sections apertured to receive the body, said portions being intimately joined together by fused metal and attached to the body by fused metal at the wall surfaces which define the apertures.

9. A bolster case for a textile mill spindle assembly, said case comprising a central tubular metal body adapted to support a spindle blade for rotation, a body-supporting flange comprising laminated metal sections with registering apertures to receive the bolster case, intimately joined together in face to face relationship and secured to said body adjacent the apertures, the joined faces of the sections having mutually registering depressions therein which together function to provide a receiving bore or socket'parallel to the principal plane of the flange for carrying a part ancillary to the spindle assembly.

HERBERT GLEITZ. PAULJ. THYREEN. CHARLES E. MILLER.

REFERENCES CITED The' following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 135,189 Wilson Jan. 21, 1873 1,966,677 Naylor July 17, 1934 2,351,951 Gleitz June 20, 1944 1,452,673 Adkinson Apr. 24, 1923 1,425,521 Glennon et al Aug. 15, 1922 2,230,652 Nelson Feb. 4, 1941 2,295,111 Hemmings Sept. 8, 1942 2,157,918 Rankin May 9, 1939 2,241,118 Cotchett May 6, 1941 2,168,248 Staufert Aug. 1, 1939 2,168,249 Staufert Aug. 1, 1939 2,320,565 Cabot June 1, 1943 2,245,423 Winslow June 10, 1941 FOREIGN PATENTS Number Country Date 458,746 German Apr. 20, 1928 329,166 German Nov. 15, 1920 23,988 Swiss May 30, 1901 6,387 British 1892

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