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April 7, 1936° w. J. ARMSTRONG 2,036,522 REDUCING MACHINE Filed June 25, 1931 3 Sheets-Sheet 1 m \D . [NI/ENTOR Wa/fer- J. Arms fro/17. April 7,-- 1936- I w. J. ARMSTRONG 2,036,522 REDUC ING MACHINE Filed June 25, 1931 3 Sheets-Sheet 2 / ,. ./ Il 4 [N V'ENTOF? Wa/P‘er J. Arms fro/1L7‘ W : ' Maw > April 7‘, 1936» _ w. J. ARMSTRONG 2,036,522 REDUC ING MACHINE Filed June 25, 1931 3 Sheets-Sheet 3 \ | iI I i i1 [NVENTOR Wa/f'er J. Arms fronj. Patented Apr.v V7, 1936 , 2,036,522 ‘UNITED STATES PATENT OFFICE REDUOING MACHINE Walter J. Armstrong, Columbus, Ohio, asslgnor to The Jeffrey Manufacturing Company, Go lumbus, Ohio, a corporation of Ohio Application June‘ 25, 1931, Serial No. 546,879 10 Claims. (01. 83-11) "The present invention relates to control In order to secure synchronized feeding and method and means for the feed and discharge of rotary reducing machines for the shredding of wet fibrous material such as wood chips, corn stalks, bagasse, rags, etc. ' , . The principal object of the invention is to provide an improved feed and discharge control method and means adapted to the production of a . relatively ?ne product in sufficiently large capac 10 ity' to insure economical operation of suchprotary reducing machines. , - , It is the purpose of this invention to feed mate rial to the reducing machine and hold it in the , machine under controlled or retarded discharge 15 so that effective reduction is secured. - According to the present invention, the feeding and‘discharging‘ means which are provided are capable of synchronization so‘that in continued operation an amount of material is discharged 20 which is equalv to the amount of material fed, a constant quantity‘ of material being maintained in the working zone of the machine. This con tributes to the production of a ?nished product of uniform ?neness and eliminates-the possibility of discharge effect, various arrangements are pos sible. According to one embodiment of the in vention to be hereinafter described, I provide . separate feed and discharge conveyors of substan- 5 tiaily the same capacity and having independent drives, each including change speed mechanism, the conveyors also being independent of each other, i. e., either one may remain stationary while the other is operated. On the other hand, 10 given two conveyors of substantially the same capacity and operated at substantially the same speed, synchronization of-their operating‘ effect may be secured by proper adjustment of the open ings-through which feed and discharge are cf- 15 fected. According to another preferred embodiment of the invention, the upper and lower runs above mentioned are the upper and lower runs of a sin gle draft device so that relative’regulation of the 20 speeds of‘ the runs is not possible. Synchroniza tion is, therefore, secured by proper relative ad justment of the feed and discharge openings. According to one method of operation of either 25 shock to the machine due to overloading and in embodiment of the invention, when operation of sures against undesirable rises in the power con the machine is to be initiated, the discharge ef sumption which has been the inherent fault of . fect is held in abeyance until the material has machines as heretofore used. been fed into the working zone to substantially 1 According to one preferred embodiment of the‘ fill the latter. ’ 30 invention, the feeding and discharge means are According to another method of operation of preferably in the form, of superposed conveyor either embodiment of theinvention, when opera ., runs, the upper conveyor run serving to' support tion of the machine is to be initiated, the feed is and feed the material to the machine and the stepped up, in either embodiment by adjustment lower run serving to engage and remove the mate of the feed opening and/or in the one embodi 35- rial which has passed through the working zone. ment by increasing the speed of the feed conThe discharge end of the working zone is up veyor so that the amount of feed is greater than‘ wardly faced and the lower conveyor run being in the amount that will be discharged, so operating overlying relation thereto may serve to hold the the feed until material has been fed into the work— , material in the working zone for more prolonged ing zone to substantially fill the latter. Upon 40 action than has heretofore been possible. For ex continuation of the feed, synchronized discharge ample, the discharge device may be operated at a is initiated so that a quantity of material sub speed insu?icient to remove the material at the stantially equal to that initially fed into the work speed with which it is passed through the work ing zone is always maintained in the latter so that I _ ing zone with a consequent backing up of thema the most-favorable reducing effect and a uniform 45 ter'ial andprolonged action thereupon. At what ever rate" the discharge is effected, feeding is ef- . product are secured. In the accompanying drawings, fected in ,consonance therewith. Preferably I Figure l is a plan view of a reducing machine utilizea machine having a grid formed ‘ofbars, _ stacked .in laterally contacting relation, rather with the device of the present invention applied 56‘- than theusual spaced screen‘ bar or similar ar rangement. Under these circumstances, all of the,’ thereto; . ' ' 25 30 35 40 45 - 50 ' Figure 2 is a section of the machine according material vwhich; is fed to the feeding end of, the’ to‘Figure 1 in a perpendicular plane at right working zone is' passed out at the discharge end angles‘ toithe rotor axis; Figurel3 is an elevation of the machine of an hence is under the complete control'ofv vthe ’ discharge’apparatus." Figures .li‘and 2; and l 55 2 ‘ 2,036,522 Figure 4 is a section taken similarly to that discharge opening of variable size is thus de?ned of Figure 2 of a machine embodying the inven by the lower run of conveyor 21 and apron 32. tion in modi?ed form. It will be noted that the lower run of con Referring to the drawings, reference numeral 5 veyc-r 21 overlies the discharge end of the work designates generally a frame in which is jour ing zone so as to engage material rising from the naled shaft 6 upon which is ?xed a rotor body ‘i latter and effect discharge over apron 32, the to which are pivoted the swing hammers or direction of travel of the conveyor being that beaters 8, the directions of rotation of the rotor , of the, arrow, Figure ,2. Adjustable guides as at being that of the arrow, Figure 2. It should be 36, Figure 2, may be provided‘ in connection with the casing side walls for engaging and support 10 stated at this point that the exact rotor con struction is immaterial to the present invention ing the ends of ?ights 3| on the lower run of and a rotor of .well known form has been shown the conveyer and a ba?le plate 31 underlying as a matter of convenience. Supported beneath and supporting the flights I8 of conveyor £2 at the rotor in conformation therewith is a grid com the rearward portion of their lower run supports 15 posed of, laterally contacting bars 9 arranged on at itsrearward end a ?exible ba?ie member 58 in 15 an are concentric with the rotor and supported by means of members as at Hi. It wiil be noted that the tops of the bars 9 are provided with sharpened abutment edges faced into the direc 20 tion of rotor rotation. The grid de?nes, together with the rotor, a reducing zone having upwardly faced feed and discharge ends. Above the feed end of the reducing zone, the casing 5 is provided with a feeding throat I I and ‘yielding contact'with the ?ights 3| of conveyor 1 The rotor shaft has ?xed thereto a belt pulley 39 belted to any convenient source of power, while, as here shown, a small electric motor 40 20 zone is a feed conveyor which is generally indi is provided for the drive of conveyors l2 and 21. Reference numeral 4| designates a change speed det’ice of well known construction. A drive pul ley 42 vand a driven pulley 43 are connected by a belt 44 and through manipulation of a hand wheel 45 which actuates the lever 56, the size of one pulley may be increased while the size of the cated at l2. other is simultaneously and proportionately de extending through the throat in substantially overlying relation to the feed end of the working ' Conveyor l2 comprises head and foot shafts creased so that a wide range of speed control with 30 I3 and I4 whose axes are in a substantially hori- I an in?nite number of variations is obtainable. ' zontal plane and are parallel to the axis of shaft 6. Shafts l3 and is‘ are journaled in the side Drive pulley 42 is ?xed on a shaft 4‘! and through walls of the casing and have ?xed thereto head and foot wheels as at I5 and l6,‘which engage 35 endless chains, as at II, the chains being‘ con nected by means of ?ights l8 which are in the adapted to be connected to a gear 50 which ieshes with armature pinion 5E. The power take-01f pulley 52 of the change speed device is form of angle bars having one web normal to the path of movement of the conveyor. The upper ley 54 ?xed on the head shaft I; of conveyor I2. a. clutch 28 under the control of a. lever 49 is in connection, by means of a belt 53, with a pul Reference numeral 55 designates a change run of the conveyor is supported on a plate l2a speed device similar to that already described, 40 which in turn is supported on shafts l9 and I4 , whose drive shaft 56 may be connected by means I. through brackets I35; and lid. ' ' of a cluteh 5‘!v under the control of a lever 58 Surmounting conveyor l2 and supported by the casing 5 is a hopper I9 whose lower open end is closed by the top run of conveyor l2 with the 45 exception of a feed opening 29 between the‘hop per and throat II, the size of the opening being controllable through adjustment of a sliding gate 2|, which is frictionally maintained in adjusted with a gear 59 meshing with armature pinion El. The power take-offpulley 60 isiconnected, by means of a belt.6|,‘with a puiiey 6,2 ?xed on . the head shaft 22 of conveyor 21. It will thus be evident that the conveyors l2 and 21 may be driven independently and at indi vidually controlled speeds. ’ ‘ ‘ ' position. It will be evident that with conveyor In the use of the machine, clutch 51 may be 50 I2 moving in the direction of the arrow, material initially disengaged and clutch 48 engaged so that = will be fed out of thehopper through the feed _ material in the hopper will be fed through gate opening 29 and to the feeding. end of the reducing 29 by conveyor 12, but its discharge will be pre zone at a rate dependent upon the speed of the vented by conveyor 21 which is at rest. When conveyor and the adjustment of gate 2|. suf?cient material has been fed into the working 55 At the discharge end of the reducing zone, a zone to secure the best working eifect; therein,' shaft 22 is journaled in the casing side walls and eonveyor 21 is setin m’otion through engagement has brackets as at 23 swung thereon, the brackets of clutch 51 and thereupon the feeding and dis having ?xed thereto a longitudinally ‘extensible charge effects may be synchronized through con frame 24 which has ?xed to its other endv similar trol ofv the conveyor speeds, through adjustment . 60 brackets as at 25, in which is journaled a shaft of gate 2|, and through adjustment of the dis‘ 26. Shafts 22 and 26 constitute'the head‘ and foot shafts of a ccnveyorgenerally- indicated at 2?, head wheels as at 28 being ?xed to'shaft 2E and engaging endless chains as at 3|)“ which charge opening through vertical adjustment pf the outer end of conveyor 21 which vfm'msthe upper boundary of the discharge opening. ‘ ‘ Another method ofv ?llingfthe working zone vupon starting the machine isv to open the gate 2| 65 so that the relative feed will be greater than‘ the A discharge spout ?xed to the casingat the , discharge. Either method may be successfully. discharge end of the working zone comprises a bottom apron 32 underlying the outer end of the employed but it should be understood that te conveyor 21 and side walls ,33_ and 34, between obtain the bestresults in reduction the'feed’and ' 65 support ?ights 3| similar to ?ights l8, above;de— scribed. ‘ 1 i > ' which the end of the conveyor lies, Conveyor 21 is swingable about shaft 22 and ?xed to frame 24 are a pair ofpoutwardly, extending‘ bolts which extend through arcuate slots 93' ‘and -_34’ to be clamped to the latter by wing nuts as at 35.‘ A discharge should bev synchronized immediately after the working zone is ‘?lled so that a constant ‘quantity of material is maintained therein. ' Asexplained above, an imperforategrldisprefé erably used as being best adapted to the ope'm- J 2,086,522 3 ing principle of the improved machine. Spaced 2. The combination with a reducing machine, screen bars or other screening means may be said machine comprising a. rotor mounted on a used under certain circumstances and since in horizontal axis and means mounted beneath the rotor and defining therewith a reducing zone hav such case a portion of the material will escape from the working zone through the cage open ings, it will be understood that conveyor 21 would be run at a proportionately slower speed than conveyor [2. With the machine set for syn chronized feed and discharge,’ and since the speed 10 of the conveyors is independent of the speed of the rotor, it will be evident that the nature of the product may be varied without varying the speed of the rotor. For example, a finer product will be secured when the speed of the feed and discharge is decreased relative to that of the rotor. ing upwardly faced feeding and discharge ends, of an endless conveyor having runs overlying the ends of saidzone and operative to effect feed thereto and discharge therefrom. 3. The combination with a reducing machine, said machine comprising a rotor mounted on a 10 horizontal axis and means mounted beneath the rotor and de?ning therewith a reducing zone hav ing upwardly faced feeding and discharge ends, of endless conveyor runs overlying the ends of said zone and operative to effect feed thereto and discharge therefrom, the conveyor runs being the superposed runs of a single draft device, the ma terial resting on the top run for feed thereby and According to the embodiment of the invention shown in Figure 4, the feed and discharge mech anisms are constituted by portions of a single‘ rising under the bottom run to be engaged and endless conveyor 63. A head shaft 64 journaled discharged thereby. in 65 at 68 69 the side walls of the frame has wheels as at ?xed thereto and engaging endless chains as 6B which pass over wheels as at 61 on a shaft journaled in the frame and over foot wheels on a shaft ‘I0 supported on a frame ‘H which is swingable about shaft 68. The endless chains carry material engaging ?ights 12 similar to those described with reference to Figures 1 to 3. The upper runs of the chains between shafts 64 and 68 are supported on a plate 63a which in turn is supported on the shafts through brackets 64a and 68a, the latter being independent of the mount ing means for frame ‘H on shaft 68. The rear ward end of the conveyor is adjustable relative to the discharge apron about shaft 68 and is se curable in adjusted position by means of out wardly projecting bolts on frame ‘ll extending through slots as at 13 and provided with wing nuts outwardly thereof. Guides as at ‘H ?xed 40 to the side wall of the casing support the ends horizontal axis and means mounted beneath the rotor and defining therewith a reducing zone hav ing upwardly faced feeding and discharge ends, of apparatus arranged to feed material to the feeding end of said zone, and a conveyor having a bottom run overlying the discharge end of said zone to engage and remove material passed through said zone, and means for regulating the 0 speed of said conveyor to synchronize its opera tion with that of the feed apparatus. 5. The combination with a reducing machine, said machine comprising a rotor mounted on a horizontal axis and means mounted beneath the rotor and defining therewith a reducing zone having upwardly faced feeding and discharge ends, of an endless conveyor arranged to support and feed material to the feeding end of said zone, of ?ights 12 on the lower run of the conveyor. and a conveyor having a bottom run overlying 110 the discharge end of said zone to engage and re Shaft 64 is driven through speed change mech move material passed through said zone, and anism such as has been described hereinbefore. According to this embodiment of the invention, synchronization of feed and discharge is secured through adjustment of the feed and discharge openings. In initiating operation of the ma chine, the conveyor may be disconnected from its drive and feed effected manually until the work drive means for the conveyors including means for varying the relative speeds of the conveyors. 6. The combination with a reducing machine, said machine comprising a rotor mounted on a horizontal axis and means mounted beneath the rotor and de?ning therewith a ‘reducing zone having upwardly faced feeding and discharge ing zone is ?lled to the proper degree. Conveyor 63 is then set in motion, the forward portion of ends, of an endless conveyor arranged to support and feed material to the feeding end of said zone, its upper run serving as a feed conveyor and the rearward portion of its lower run serving as a and a conveyor having a bottom run overlying the discharge end of said zone to engage and re move material passed through said zone, and discharge conveyor. Another method of initiating operation is to open the feed gate and allow the conveyor to carry in a greater amount of material to the working zone than can be discharged by the con veyor. 60 4. The combination with a reducing machine, ' said machine comprising a rotor mounted on a . It will be understood that the invention is capable of embodiment in forms other than those shown and described, and accordingly, I do not limit myself except as in the following claims. I claim: 1. The combination with a reducing machine of the class described, said machine comprising a casing with feed and discharge openings, of a conveyor section arranged to effect material feed through said feed opening, a conveyor section ar ranged to effect discharge through said discharge opening, said discharge conveyor section consti tuting the top boundary of said discharge open ing and being adjustable to vary the capacity of said discharge opening, and means for retaining said discharge mechanism in adjusted position. drive means for the conveyors including change ' speed mechanism for each of the conveyors._ 7. The combination with a reducing machine, said machine comprising a rotor mounted on a horizontal axis and means mounted beneath the 60 rotor and de?ning therewith a reducing zone having upwardly faced feeding and discharge ends, of an endless conveyor arranged to support and feed material to the feeding end'of said zone, and a conveyor having a bottom run overlying the discharge end of said zone to engage and re move material passed through said zone, and in dependently operable drive means for the con veyors. 8. The combination with a reducing machine, said machine comprising a rotor and means mounted adjacent the rotor and de?ning there with a confined reducing zone having feeding and discharge ends, of mechanism arranged to feed material to the feeding end of said zone, a con— 75 4 2,086,522 veyor having a run adjacent the discharge end of said zone, said conveyor being of such width and said run being so disposed as to extend sub stantially across said discharge end, the conveyor being of a construction to prevent the passage therethrough of reduced material,_said run‘ de ?ning a portion of a discharge opening and serv ing to engage and discharge material out of said zone, the arrangement beingsuch that material 10 is passed through said zone under the impelling action of the rotor at a rate determined ‘by the discharge action of said conveyor run, and means for regulating the speed of said conveyor to syn chronize its operation with that of the said mech , discharge material out of said zone, the arrange ment being such that material is passed through said zone under the impelling action of the rotor at a rate determined by the discharge action of said conveyor run, and drive means for the con veyors including means for varying the relative speeds of the conveyors. I 7 10. The combination with a reducing machine, said machine comprising a rotor and means mounted adjacent the rotor and de?ning there 10 with a confined reducing zone having feeding and discharge ends, of endless conveyor runs of which one is disposed adjacent the feeding end of said zone and is operative to e?ect feed thereto, an other of said runs being adjacent the discharge 9. The combination with a reducing machine, end of said zone and being of such width and so said machine comprising a rotor and means disposed as to extend substantially across said mounted adjacent the rotor and de?ning there discharge end, said other run being of a construc with a con?ned reducing zone having feeding and tion to prevent the passage of reduced material discharge ends, of an endless conveyor arranged therethrough and de?ning a portion of a dis 20 to support and feed material to the feeding end charge opening and serving to engage and dis of said zone, a discharge conveyor having a run charge material out of said zone, the arrange adjacent the discharge end of said zone, said dis ment being such that material is passed through charge conveyor being of such width and said run said zone under the impelling action of the ro being so disposed as to extend substantially across tor at a rate determined by the discharge action 25 said discharge end, the conveyor being of a con of said other run, the conveyor runs being the struction to prevent the passage therethrough of opposite runs of atsingle endless draft device. reduced material, said runs de?ning a portion of a discharge opening and serving to engage and WALTER J. ARMSTRONG.