Dw 17, 1946- . 'E. G. EPPENBACH ET AL 2,412,677 ADJUSTABLE MILL UNIT» Filed March ‘1, 1944 2 Sheets-Sheet 1 / ‘A 37. ATTORNEY De¢~ 17, 1946- E. G. \EPPENBACH ETAL 2,412,677 ADJUSTABLE MILL UNIT Filed March 1, 1944 v 71:12,. 2 Sheets-Sheet 2 ‘ ATTORNEY Patented Dec. 17, 1946 2,412,677 UNITED STATES PATENT OFFICE 2,412,677 ADJUSTABLE MILL UNIT Edwin G. Eppenbach, Manhasset, and Henry Imshaug, Flushing, N. Y.; said Imshaug as signor to said Eppenbach Application March 1, 1944, Serial No. 524,823 4 Claims. (Cl. 241-259) This invention relates generally to mills of de vices for grinding, milling and mixing of mate 2 not shown in the drawings. Within base | 0 there is suspended a motive source H, such as an elec rial, such as is used in the production of col_ tric motor, with a. vertical shaft I2 extending up loidal compounds, and especially to the adjust wards. The motor is suspended from the em ment features of the mill units employed in such 6 closed bottom structure [3 of a frame M, which devices. latter rests upon base Ill. The center of frame The present invention is a continuation in part bottom #3 is apertured at I5, which aperture is of our co-pending application Serial No. 437,979, covered by a drip guard [6. Structure I3 and ?led July '7, 1942, for Vertical mill, and its major drip guard I6 effectively prevent liquid or mois object is to provide simple, effective and accu ture from entering the base and damaging the ra'tely operable means whereby the elements of motor. mill units may be precisely adjusted relative to Secured to and supported by frame i4 is a one another, and wherein are provided readily combination journaling and adjusting member visible means for calibrating such adjustment l7, consisting of a hub structure IS, with which and other means for locking the adjusting means 15 is associated a threaded adjustable cup l9, ac in the desired position. commodating a shaft bearing 20. Cup l9 may be While the adjustment of mill elements rela set in its adjusted position in respect to hub [8 tive to one another is nothing new in the art, by set screws 2!. Within hub I8 is lodged and this operation becomes exceedingly important in guided a sleeve 22, which is threaded externally devices where material of ?ne texture is to be 20 at 23 and is engaged by an internally threaded prepared, and especially when material which is and calibrated index ring 24, by means of which to be’ processed is intended to be milled to a cer ring sleeve 22 may be adjusted in upward or tain ?neness in order to bring it to a state of downward directions. Sleeve 22 may be held in colloidal suspension within a liquid carrier. its adjusted position by means of set screw 25 en In such devices it becomes imperative that the 25 gaging ringv 24. adjustment of the mill elements to be very accu Within sleeve 22 and j'ournaled in bearings 20 rate, and that the amount of such adjustment is rotor shaft 26. The latter is joined with shaft becomes readily perceivable to the operator from l2 of motor II by means of coupling 21, located without the device so as to- facilitate accurate re adjustments as may be required due to either the desire to increase the ?neness of the prod not, or to compensate for the wear of the mill elements in the course of continuous operation of the device. The foregoing important objects and advan tages will become more fully understood from the following description, in connection with the accompanying drawings, wherein: Fig. 1 illustrates an elevation of a device em ploying adjustable mill elements, shown partially in section; ' , Fig. 2 illustrates an enlarged partial detail view of the grinding and milling mechanism; Fig. 3 is a similar illustration‘ of a modi?ed form of the grinding and milling arrangement; Fig. 4 is an enlarged detail view in vertical cross section of the mill unit and its adjusting means; and . within frame l4. Secured to shaft 26 is rotor 28, forming a part of the grinder or mill unit of the device. Rotor 28 is exchangeable. The stator of the mill is indicated, at 29 and also com prises an exchangeable member or insert, which is supported by the broadened upper or ?anged end 38 of sleeve 22, and which broadened end forms the bottom of the mill casing, which houses the grinder unit. It will be seen that the casing is’ provided with a water jacket 3|, whereby the casing, and therefore the grinder unit, may be readily cooled or held at any desired tempera ture required for the matter to be treated within the device. , ~ Above jacket 3| is a jacketed top member 32, held together with ?ange 30 of sleeve 22 by means of spacer bolts 33. Supported by upper jacket structure 32 is a hopper 34, provided with a cover 35, which may be completely closed if so desired. By means of the jacket in member 32 the con Fig. 5 is a plan view of the adjusting nut tents of the hopper may be kept at any desired thereof. 50 temperature. The top of the hopper is provided Referring now speci?cally to the drawings, with an inlet 36 into which is removably placed numeral 10 denotes the base of the device, which the end of the goose neck 31 forming the upper is preferably placed upon the floor, but which portion of conduit 38, joined at its lower end with may be swung to any desired position and se outlet pipe 39. v The latter is connected at 40 with cured in that position by bolts or other means 55 the grinder unit, and its discharge is controlled 2,412,677 3 4 the ring hub are also machined, and the height of the hub substantially corresponds to the dis tance between the machined surfaces in body 5|, which surfaces form end abutments for the ring hub. Thus the ring is operatively held between these end abutments and can not move axially, whereby its movement is restricted to a purely by valve 4|. This valve may be so placed that it either provides a direct discharge from the grinder unit through its hollow structure 42, or that it closes outlet pipe 39 to provide circula tion of the matter being milled through pipe 38 to the top of hopper 34 and back ino the grinder. Referring now to Figs. 2 and 3, these detail ?gures illustrate'two forms of the grinding unit. In Fig. 2 shaft 26 is provided with a reduced por rotary motion. The ring hub is provided with an internal thread 62 which engages external thread 23 of tion 43, and a threaded end 44, with which two 19 sleeve 22. Extending from the ring hub is a portions one-piece rotor 28 is associated. Stator web which supports an annular enlargement 29 comprises also a one-piece structure and is‘ wherein a plurality of radial recesses 63 are pro supported by the upper ?anged end 30. of ad vided ‘to facilitate turning and adjustment of the justable sleeve 22. ' ' ' ' ring in respect to casing 5|, which latter has a Fig. 3 illustrates a somewhat modi?ed form of spare-out 54 in its otherwise closed, hollow body the mill elements. In that ?gure shaft 26_ is again to provide access to recesses 63 and to allow rota reduced at 43, but is provided with a much longer tion of the ring through a short arc. threaded end 44’, by means of which a multiple The upper portion of the annular ring en piece rotor is secured to the shaft. In this con largement is beveled, and upon that beveled por 20 struction the rotor comprises a supporting mem tion there is provideda calibrated strip 65. Se ber-45,21. cover member 46 and an exchangeable cured to the upper ledge of spare-out '64 is an insert-.41, which may be in the form of an abra indicator 55 pointed toward the calibration on sive ring. The latter is clamped between mem strip 65. At the top portion of the ring annulus bars 45 and 46. The stator of this modi?ed form is' also‘ provided with an exchangeable abrasive 25 there is provided a, plurality of recesses 61, seen clearly in Fig. 5, and serving for the reception element 48', lodged within the inverted dish-struc of the reduced lower end of set or lock screw 25, operatively mounted in the upper ledge or ture 49. Attention, is now invited to Figs. 4 and 5, and especially to the arrangement including the mill unit and its adjusting means. It will ‘be ob 30 served that frame l4, within which the shaft coupling‘ 2'! operates, ‘serves as support for the entire upper structure of the mill devicefover Frame l4 also ‘which is mounted hopper 34. serves forattaching that structure, such as by bpltsj5d.’ ' " ' ‘ ' cesses 5'! of the nut holds the latter against move ment._ When it becomes evident from the product leav The combination journaling and adjusting ing the- mill, or for any other reason, that a re 40 whichulatteris externally threaded. These jour guide sleeve 22. It will be noted that 'up'per hub 5; is provided with an opening 54 in registry with of adjustment may be usually determinedv for openingiiS, provided in'guide sleeve 22, in order to" facilitate thelubrication of’ shaft’26 within different types of ‘work before the device is, put into use, whereby the necessity, of employing skilled ‘manipulators is effectively overcome. It the guidesleeve. ' Theelower threaded end of hub 53. is engaged 50 marily designed for adjusting the stationary ele ment of the mill‘, unit in respect to the rotor, the ' latter is rendered, adjustable also. Bearing cup H3 in thread engagement with lower journaling Thu thrustrbearinlgh 20.; supports shaft 26, while in guide sleeve 22 bearings 51 and 58_are provided hub 53 accommodatesthrust bearingZil of rotor to correctly ‘journal shaft“ and its rotor in re shaftZiS. By unscrewing or tightening cup H! in respect to hub 53, the shaft may be lowered ‘or spectto the stator. Stator 29 is held in its cor rect'position by means of an inlay 59, secured by means'of bolt 60' passing through ?‘ange‘3il of gruidersleeve 22. This insert not only’ holds stator 29 in position, but also provides a seal betweenxthe rotor- and the stator, so that the ma terial milled by the unit is discharged into, an is merely necessary to give directions to what setting nut 24 is to be, advanced after stated op erating periods of the mill. ' While the above described arrangement is pri toiprevent the escape of lubricant passed through passage‘ 55", into guide sleeve 22. adjustmentjof the mill unit, is required, such new adjustment'may be easily and accurately made by simply elevatingv lock screws 25 above the'nut and: turning the latter to a desired mark of the calibration, whereupon screw 25, is again lowered into one of the ‘recesses 61. The amount naling hubs serve asv supports and journals for by“ the internally threaded portion of adjust able bearing cup» l8, in which'is lodged thrust V bearing. Him‘. shaft 25‘. In the lower erid of cup |_,, there is provided ‘at 55‘. a packing‘ring adapted latter may be turned with relative ease, whereby an exact adjustment of the stator in respect to the rotor is facilitated. Indicator 66 denotes such adjustment on the scale or calibration 65, and ‘ lock screw 25 screwed down into one of the re ' means l‘l include a hollow body 5| ,' thebase I8 ofjwhieh is secured by the aforesaid bolt 5|] to frame I4, Extending from body 5| are upper journaling hub 52 and lower journali'ng hub 53, cover portion of journaling body 5|. By means of radial recesses’ 63 of the nut, the raised. One or more set screws 2| provided in cup I9 will. keepthe latter in the desired ad justed position. ' ‘ ' Although we‘ have shown and described cer 65 tain'speci?c constructions of ‘our vadjusting means whereby the stator may be positioned ‘at‘th‘e for the'mill elements, it is obvious that changes and improvements may be incorporated‘therein, without departing from the broad scope of our invention, as defined in‘the annexed claims. lelly machined surfaces between which, operates said jrnill structure ‘including combination jour annular space‘indicated at“ 6|, from which it passesinto conduit 39. ‘ ' The adjusting means for guide sleeve 22, claim: desired distance from the rotor, are located with 70 We 1. In av colloidal mill device, a frame, a motive in. thehollow portion of enlarged body 5| se source suspended from the frame, a mill structure curedrtoeframe l4. The internal structure of supported by and removably secured to the frame, body 5| provides‘two oppositely disposed paral; nali'rig and" adjusting means, said journaling the hub of ring or nut' 24‘fThe outer faces of 75 2,412,677 5 6 means forming a hollow body, serving for at tachment of the mill structure to the frame, with upper and lower guide hubs extending from the hollow body, a bearing cup adjustably associated with the lower guide hub and accommodating a thrust bearing, a mill shaft ‘operative by said 3. In a mechanism for adjusting elements of mill units in colloidal mill devices and the like, an adjustable guide sleeve for journaling the _ shaft of the movable element of the mill unit, said guide sleeve serving as support of the sta tionary element of the mill unit, and means re stricted to a purely rotary movement by ?xed abutments, and being in operative engagement _ motive source journaled in said bearing, a guide sleeve for the shaft slidably mounted in said guide hubs; said adjusting means being operative with said sleeve for adjusting the latter, and thus the stationary element, relative to the movable element, and means for setting said adjusting within the hollow body of said journaling means and engaging said sleeve for adjusting the latter, a mill rotor associated with said mill shaft, said means, and other means for arresting said ad justing means in the set position. 4. In a colloidal mill device having an adjust rotor being rendered adjustable in respect to said guide sleeve by way of said mill shaft through the adjustable bearing cup, a mill stator sup ported by said guide sleeve and being adjustable 15 able mill unit, a centrally apertured ?xed support for the mill unit including an annular hollow, substantially closed body enlargement, a sleeve adjustably mounted in the apertured portion of the support and provided with a ?ange to which in respect to the mill rotor by way of the guide sleeve through said adjusting means in opera tive engagement with said guide sleeve, and means for arresting the movement of said adjusting 20 the mill stator is attached, a rotor shaft oper means in the adjusted position. ative in said sleeve and being adjustable both in 2. In a colloidal mill device, as set forth in respect to said sleeve and to said support, means claim 1, said calibrated adjusting means com operative within said body enlargement for ad prising an internally threaded member operative justing the sleeve, and thus the stator, in respect between end abutments, thus restricting its oper to the support and the rotor, means in said en ation to a rotary movement only, its internal largement for restricting the movement of said thread engaging the externally threaded portion adjusting means to a rotary operation only, and of said stator support, means provided with said other meansoperative from without said enlarge member for facilitating its rotary operation, and ment for preventing the movement of said ad a calibration arranged peripherally on said mem ber for setting it. said arresting means compris ing recesses in said member engageable by a lock screw to hold the member in its set position. 30 justing means. EDWIN G‘. EPPENBACH. HENRY IMSHAUG.