US1961291A - Grinding mill - Google Patents

Description

June 5, 1934. H P GUlLLO 1,961,291

GRINDING MILL Filed Jan. 20, 1953 F27- l- Patented June 5, 1934 UNITED STATES GRINDING MILL Harry P. Guillo, New York, N. Y., assignor to General Printing Ink Corporation, New York, N. Y., a corporation of Delaware Application January 20,

21 Claims.

This invention is directed to an improvement in grinding mills, and more particularly to a means for attaching the side boards to provide for their adjustment or removal from operative cooperation with the rolls.

Mills of the type with which the invention is more particularly concerned include a pair of revolving drums or rollers, between which the ingredients are repeatedly passed, with subsequent reduction of the space between the rollers until the material is reduced to the requisite fineness. To prevent spreading of the mass in the direction of the axes of the rollers, side boards are used, and these side boards have their lower edges conforming to and closely tting the periphery of the rollers for an appreciable distance beyond the grinding area of the rollers. Y

In the use of such a mill it is frequently necessary to reduce the space between the side boards to accommodate different quantities of material, and also necessary to move the side boards away from the rollers for convenient cleaning.

The present invention is directed particularly to the mountings for the side boards, providing a simple, convenient means for relative adjustment of the boards axially of the rollers, and a further means by which the side boards or either of them, may be readily and conveniently moved in a direction away from the rollers, as may be necessary from time to time.

The invention in a preferred form and construction is illustrated in the accompanying drawing, whereinz- Figure 1 is a view in side elevation illustrating the side board support according to the invention, a portion of the rollers and the side board in operative relation thereto being shown in full lines and the movement of the side boards to an inoperative position relative to the rollers being shown in dotted lines.

Figure 2 is a side elevation of the construction shown in Figure 1. f

Figure 3 is a broken vertical section on the line 3 3 of Figure 1.

The conventional parts of a grinding mill necessary to an understanding` of the present invention are illustrated as including cooperating rolls 1 and 2 and an end board 3, it being understood thatV the end board and the details of-support and connection of said board are duplicated for the opposite end of the rolls. 'I'he board 3 at each end is formed at its lower portions with arcuate edges 4 which are coincident with the peripheral surfaces .of the rolls, the

1933, Serial No. 652,744

apek or meeting point 5 of these arcuate edges fitting down close to the grinding area of the `rolls when the board is in operative position.

median line of the board 3, the lower end of the `bracket arm being laterally enlarged at 7 and formed centrally with a longitudinally ranging slot 8 to slidably fit over a bolt 9 secured in the end board 3 and projecting outwardly therefrom. The bolt 9 may be provided with a securing nut 10 to overlie the walls of the slot, and the lower end of the bracket is provided with an adjusting screw 11 which may be set to engage with the bolt 9 to properly position relatively the board and bracket. The lateral enlargement 7 of the lower end of the bracket is held against play relative tothe board by set screws 12 which bear against the board as shown.

The upper end of the bracket arm 6 above the board is provided with a block 13 projected at right angles to the arm with its length parallel to the similar. dimension of the board. The upper end of the block 13 has an undercut guidving projection 14 on its upper edge adapted to slidably cooperate Vwith a` complementarily formed guideway l5 in an upper block section 16, the top wall of which latter block section is formed with an opening 17 to receive a bolt 13 headed below theV opening to prevent independent upward movement. The bolt 18 slides between frame bars 19 which are arranged above and parallel to the axes of the rolls 1 and 2 and in line with the grinding point of the rolls. The threaded upper end of the bolt 18 is provided with a securing member, preferably in the form of a hand wheel 20, overlying the upper surface of the bars 19.

The guideway 15 and cooperating guide projection 14 on the block 13 are formed on an arcuate plane from a center coincident with the center of one of the rolls 1 and 2,'and the upper block section `16 is provided with aremovable end stop 21 removably secured by a bolt 22 to prevent relative movement of the block sections 13 and 16 in one direction, such movement in the opposite direction, however, being free when desired to remove the end board.

The block section 13 is provided with a transverse shaft 23, on one end of which is secured a hand lever 24 and on the opposite end of which is secured a disk 25 having a lateral pin 26 to yprovide with the disk anoperating crank. Car,- ried by and loosely depending from the crank lpin 26 is a rod 27 on which is threaded an ad- A bracket arm 6 is secured in the vertical justing nut 28. Normally the rod 27 aligns with a similar rod-like projection 29 from the upper edge of the board 3 and between the board and the adjusting nut 28 and encircling the rod sections 27 and 29 is a coiled spring 30, the tension of which may be obviously adjusted by the nut 28. 5

By reason of the crank structure described, it is apparent that through operation of the hand lever 24, the crank pin 26 may be arranged at its lowest point of throw or at any point above such lowest point by movement of the lever. point of throw, the spring is naturally compressed and pressure is applied Von the upper edge of the board to thereby substantially -lock the block sections 13 and 16 in operative relation, as shown in full lines in Figure l. The arrangement is such that when the crank pin is in the position of maximum holding effect, the lever is vertical, aligned with the bracket, and limited in further movement in one direction by astop 31 carried by the block section 16 and cooperating with the projecting portion 32 ofthe lever. Y

In this locking position of the parts, it will be apparent from the drawing that the spring rod including the section 29 ispermitted to move slightly past the center position, thus'serving as Va lockfor the whole device when the upper end of the lever 24 isagainst the stop 31. By reason of this stop 31, the lever 24 is movable in but one direction, i. e. toward the left in Figure 1, and may be moved in this direction to the limit permitted by a stop 33 carried by the block section 13. When the' lever is in this latter or inoperative position, the crank pin 26 lis raised from its lowermost position, the tension of the spring relieved, and the block section 13 may then be moved laterally or toward the left as controlled bythe track 15 ofthe block section 16, and as the plane of this movement is exactly coincident with the periphery of the grinding roll, it is apparent that/the board as a whole following thisr movement will follow the periphery of one roll andbe moved wholly'from cooperation with the other roll. This position is indicated in dotted lines in Figure 1. As previously stated, the opposite end board is supported in an exactly identical manner and, of

course, may be operated andl controlled in the same way.

The board 3 is ypermitted, a limited vertical .movement by the construction described being guided by the lower connection of thebracket arm 6 and further by a pin 34 carried bythe board and engaging in a slot 35y in a portion 36 of the bracket arm 6 which directly overlies and bears against the board 3. The relative limited movement ofthe side board is controlled by the bolt 9 movingin the slot 8. `The adjusting screw 11 serves tolimit the travel of the board toward the roll and 'thus',definitelydetermines l :the space betweenlthe edges ofthe board and the periphery of the rolls. The'setscrewslZ bear against' the surface of the board with suflicient "tension to hold the board rmly to the bracket arm 6 to prevent any possibility ofrwabbling of vthe side board without, however, interfering with 'each other axially of the rolls' by loosening the locking means 20 and thus freeing the blocks,

bracket arm andboards for longitudinal 'move- When the crank pin is in its lowest ment between the bars 19. Either board at will, when in operative position, may be readily removed therefrom to permit necessary cleaning or for any other purpose by shifting the lever 24 in the direction indicated in dotted lines in Figure 1 to materially reduce the tension of the spring 30 and thus permit the bracket 6, block section l3'carried thereby, and board 3 secured thereto to be swung in a path coincident with the periphery of one of the rolls so that the .-board will move around one of the rolls, away A:from` the other, and away from the grinding Aline of the rolls, all as clearly indicated in dotted lines in Figure 1 of the drawing.

Obviously, complete removal of the board is facilitated byiswinglng the block section 13 wholly free. of the guideway 15, whereupon all connections of the board proper with the upper'block section 16 are removed and the board as a whole may be lifted entirely free from the rolls.

1. A mill including grinding rolls, a side board at each end of the roll, the side boards having roll-cooperating edges corresponding incontour with that of the rolls, means for adjusting the side boards toward and from eachother, a'standard connected 'to each side board, a block guidilngly receiving the upper end of the standard, Vthe guiding means ofthe block forming a guiding path for standard movement 'concentric with the surface'of one of the rolls.

2. A mill including grinding rolls, a side board at each end of the rolls, the roll-cooperating edges of the side boards corresponding in contour with the peripheries of the rolls, a standard connected to each side board, 4a block carried 'by the upper end of the standard, ya second blocksupported above the standard, the meeting faces of the blocks rbeing formed for sliding engagement on a path concentric with the surface of one of the rolls.

3. A mill including grinding rolls, a side board at eachend of the rolls, the roll-cooperating .edges of the side boards corresponding in contour with Ythe peripheries -of the rolls, a standard connectedto each side board, a block carried by theupper end ofthe standard, a second block supported abovethe'standard, the meeting faces of the blocks `being'formed for sliding engagement on a path concentric with" the surface of one of the rolls, andspring means between the sideboardand the standard-carried block for clamping the blocks against movement.

4. A mill including grinding rolls, a sideboard at'each end of the rolls,` a standard-connected to each sideboard, a block carried bythe upper end 4of the standard, a secondblock supported above the standard, the meeting faces V-of the vblocks being formed vfor sliding cooperation on a path concentric 'with the rsurface of one'of the rolls. spring means for yclamping "theblocks against movement, and -a lever for operating the spring means. 'A

" `5. A mill including grinding rolls, aside board having an edge for cooperating with the iolls and of a contour corresponding to that of the `roll periphery, a standard connected to the side board, a block secured to the-upper end of the standard, a second'block mounted for adjustment longitudinally ofthe rolls, said blocks be- "i" ing designed for sliding engagement on a path concentric to the surface of one of --the rolls,a crank' rcarried by theblock secured to the standard, a springint'erposed between said 'crank and r the adjacent side boardgand alever for'operating the crank to tension or release the spring for holding the blocks against or permitting their relat'ive'movement. Y

6. In a mill, grinding rolls,fa sidev boardat each vend of the rolls, a standard connected to the side board, a block secured to the upper end ofthe standard, asecond block mounted for adjustment longitudinally of the rolls,` said blocks being designed forsliding cooperation on a'path concentric to the surface or one of the rolls,a crank carried by the'block secured'to the standard, a spring interposed between said crank and thev adjacentside board, fa lever for operating the crank to tension or-release the spring for holding the blocks against or {permitting their relative movement, and means carried by the respective blocks for limiting `relative movement of the lever.

7. A mill including grinding rolls, side boards having roll-cooperating edges corresponding in contour tothe peripheries of the rolls, a standard adjustably connected to each side board, a block carried bythe upper end of the standard, a second block supportedabove the standard, the leading faces of the blocks being in engagement and formed for sliding cooperation on a path concentric with the surface of one of the rolls, a spring rod between one of said blocks and the side board for clamping the blocks against movement, and a lever for operating the rod.

8. A mill including grinding rolls, side boards having roll-cooperating edges corresponding in contour to the peripheries of the rolls, a standard adjustably connected to each side board, a block carried by the upper end of the standard, a second block supported above the standard, the leading faces of the blocks being in engagement and formed for sliding cooperation on a path concentric with the surface of one of the rolls, a spring rod between one of said blocks and the side board for clamping the blocks against movement, a lever for operating the rod, and means for limiting the movement of the lever in locking position, the spring rod when the lever is in locking position being carried beyond center to utilize the spring as an additional locking means.

9. A mill including grinding rolls, a side board at each end of the rolls, standards, a set screw connecting each standard to one of the side boards, cooperating bearing blocks for the upper end of the standard having their meeting faces on a path concentric with thesurface of one of the rolls, and manually controlled means for locking the blocks against movement and for releasing the blocks for sliding cooperation.

10. A mill including grinding rolls, a side board having roll-cooperating edges of a contour corresponding to that of the periphery of the rolls, standards connected to the side board, the connection providing for adjustable limited movement between the standard and side board, and means for supporting the standard for bodily movement in an arcuate path.

11. A mill including grinding rolls, a side board having roll-cooperating edges of a contour corresponding to that of the periphery of the rolls, a standard, a bolt engaging the board and movable in a slot in the standard, a set screw for limiting the relative movement of the bolt and standard in one direction, and manually operable means for fixing the side board and standard at the limit of play permitted by the set screw.

12. -A miliV including. vgrinding relis, v a side fboard havingfroll-cooperating edges or a contourfcorresponding-to that of theV periphery of the rolls,` a standard, a 'bolt secured-to the board and -movable in a slot in the Standard, a set screw toadjustably limit movement of the bolt in one direction in the standard, and means carried by' the standard and cooperating with the board to prevent relative movement of the board and standard' other than that permitted by the bolt. i

13.` A millvincluding grinding rolls, a side board having roll-cooperating edges of a contour corresponding to that-of the periphery of the rolls, a standard for supporting the side board, said standard being formedwith a' longitudinal slot, a bolt passing through said slot andiixed to the sideboard, a set screw adjustably mounted in one end of the slot'toi limit movement of the bolt relative tothe slot in one direction, a pin carried by the standard remote from the slot, said board beingv formed'with a recessr toreceive ythe pin tof guide the boardA in movement' 'relative to lthestandard. i

14..A mill including grindinglrolls, a side board having roll-cooperating edges of a contour corresponding to that of the periphery of the rolls, a standard for supporting the side board, said standard being formed with a longitudinal slot, a bolt passing through said slot and fixed to the side board, a set screw adjustably mounted in one end of the slot to limit movement of the bolt relative to the slot in one direction, a pin carried by the standard remote from the slot, said board being formed with a recess to receive the pin to guide the board in movement relative to the standard, and means carried by the standard and bearing upon the board in both directions beyond the bolt.

15. A mill including grinding rolls, a side board having roll-cooperating edges of a contour similar to that of the periphery of the rolls, an element carried by and movable with the side board, and a member having sliding engagement with the element, the relatively slidable engaging parts of the element and member defining an arcuate path having a center substantially coincident with the center of the roll through which the element and thereby the side board is moved in operation.

16. A mill including grinding rolls, a side board having roll cooperating edges of a contour similar to that of the periphery of the rolls, an element carried by and movable with the side board, and armember having sliding engagement with the element, the relatively slidable engaging parts of the element and member defining an arcuate path through which the element and thereby the side board is moved in operation, said arcuate path substantially corresponding in curvature to that of the periphery of the rolls.

17. A mill including a grinding roll, side boards having roll-cooperating edges of a contour corresponding to that of the periphery of the rolls, a standard carried by each side board, an element carried by the standard, a member engaged by the element, the engagement of the member and element permitting sliding movement of the element with respect to the member in an arcuate path corresponding substantially to the periphery of the rolls, whereby movement of the element along such arcuate path compels similar movement of the standard and side board.

18.;A millincluding grinding rolls,- side boards having edgesf cooperating with therolls: and of la' commun-corresponding toi the, periphery =of the rolls, afstandandcconnectedatothe .side board for limited. free movement :Withrespect thereto,

`azblock carried-by.theuupperaend of the: stand- ;ardma second;.block-f.with whichzthe standard- 4carried :Ablockyengages for slidingpooperation,

.the engaging;facesy of-theblocks presenting an larcuate :pathzcorresponding substantially to the periphery of a roll, and manually operable means :whereby-fthe blocks 'may-be held against yfree sliding cooperation.

19. Amill including,k grinding rolls, side boards havingedgesccooperating @with the rolls andof afzcontoun` corresponding to the; periphery of the rol-1s, la standard connected to the sideboard for limited"l free. movement with 4 respect theret0,-,;ai:b1ock carried eby theiupperend of `Athe -standard,..a second-.block with which the standard-,carried @block :engages for sliding y cooperation,\the` engaging-.faces of ,the` blockspresenting. anzlarcuate path corresponding'substantially to the periphery of arroll, manually operable vmeans whereby the'-b1ocks may he held.y against substantially coincident `with the centerof one Yof the roll cooperating edges-,ofA the` side boards.

--21.v=In-a mill, grindinglrollspside boardshav- .ingroll-cooperating` edges corresponding in contour to the periphery of the rolls,.and.a..sup-

Vport. for A the side boards, said. `support comprising l"cooperatively Aengaged relatively sliding parts formed to compel such relative sliding .movement to followhanlarcuate path, .said arcuate -vpath being concentric `with the curvature of .the periphery of the rolls.

HARRY P. GUILLO.

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