US2374451A - Bolter drive - Google Patents

Description

2 Sheets-Sheet 1 m w w m m M Di 3 WM V v m 7 0 0 m M P. n w H w. E. NORVELL BOLT-ER DRIVE Filed March 3, 194:5

April 24,,1945- w. E. NQRVELL 2,374,451

BoLTER DRIVE Filed March 8, 1943 2 Sheets-Sheet 2 I i V 38 5 37 'WILLIA LI E N RVELL ATTORNEY Patented Apr. 24, 1945 UNITED STATES PAT ENT OF FI GE l w o 2,374,451

to e. DRIVE williarn E. No r viell, Kansas Aplilicationhflarch 8, 1943, sefialNo. 478,481 isoiei s. (c1. 2059:3665) My'invention relates to bolters, "and more particularly to a 'drive'for bolters.

In flour-sitters or'bo'l'ters, it isdesirableto provide a "gyratory motion tofthe bolter body cone tain'ing the sieves. This gyratory motion should vary in rate as well as in radius of ,gyration for different materials that are to be separated by the boltero It is desirable that the radius of gy ration be capable of very fine and accurate adjustment to glet 'the'desired bolting actionfor the particular material that is to 'be acted on by the bolter, and it is desirable that the motion that is produced by the niieans moving the bolter 'to produce the sifting action Jbea tr'ue gyratory motion.

It is an important purpose'of my invention to provide new and improved means for producing a gyratorymotion in a bolterthatis re'adilyatljustabre so as to produce a gyration of the bolter mourite'd rotatable weights, which after having beenfiset into motion and after having attained their desired rate of rotation, set up a gyratory motion of the desired radius of g'yrationof the bolte'r, said eocentrical'lyarrangediveights being,

Preferably, each or 'said 'rotat'able wheellike inein'bersi'sprovidd with "a weight spaced from the axisof rotation thereof, whi'ohrhas the'same mass as that of the weights provided on the other wheer-nke rotatable members, and the adjustrnen't'of thecente'r of mass is obtaihedby'rota'tme one n'iernber'of eachpair' about the axis of retation relative to the otherme mber of each pair, one of 1 the members of each pair being fire-e on the shaft carrying said memher'sso as to not be adjustable 'thera'l-du'nd; and the other -mem'lie'r er thatthe sam a'n be 'adjusted tofanyposinon desired aroupoith ax s or the'shafit. Preferably, the parrot members above and the pair of members: below the holter Body are adjusted tion to firovide new anermorov'e'o "nieains for drivpreferably, made up of means located adjacent thetop of the bolter and means located adjacent the bottom of the bolte'r and rotating about a comr'non axis, "so that the eocentrically mounted weight above the top or the bolter and the eccentricalliy mounted Weight below the bottom or tation thereof, comprises a pair of rotatable members, which are, preferably, of a wheel-like character, and which are each provided with a weight that is mounted eccentri'cally to the axis of rotation of said members, which are relative- 1y adjustable to vary the position of said eccentricaily mounted Weights relative to each other, toothus adjust the centers of mass of said rotatahle members relative to each other, whereby very fine "adjustment of the locatioh of l the cen;

ter of massof each ofsaid pair of members relative to the axis of rotation can be obtained,

- n themes taxrati a. Bi

mg "afbolter so that these-me ha gyratory inotion, cofnprising a drive shaft, 'vv'hich is aligned lIy with th axis of yration or the "e i s the he ea fl tqfil' w? t e l di fi of "gyration, so that the drive "shaft win lieft y hisi rr ag m t n re ayed. Qi Qtt dri e mernber being ,a

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un es r b e v. ,lssa' lto mm. a 1 i- 'edtion between thejdriv'e d said iklmean tt err on of the device can be star ed, at th devic at, tains t s d e' r the um a al J int is in; operative, in that the shaft portion or; on side eo i in true the l nment w th th shaft Po n n the o her side t ereof and. the zcou Fling h 1 th u ive sa min .act'j mer l a an ordina y shaft coupling latter the speed of gyration desired a has v been attained, with the a k properly a uste so tha th .leln ths h crank arm willlbe the same as the radius of gyration oithe bolter. o l

Other objects andadvantages of my invention will appear as the description oft he drawings proceeds. I desire to have it understood, however, that I do not intend tovlio it myself .tothe particular details jshown or described, except as defined in the claims.

crankmemb'er, said crank In the drawings:

Fig. l is a perspective view of a bolter to which my improved driving means is applied, the supporting means for the bolter and the drive shaft being partly broken away.

Fig. 2 is an elevation of the bolter driving means producing the gyratory motion, the gyratory shaft being partly broken away and only fragments of the bolter body being shown.

Fig. 3 is a fragmentary enlarged view partly in section and partly in elevation, showing the mounting of a pair of the wheel-like members on the gyratory shaft.

Fig. 4 is a perspective view of the adjustable crank member forming part of my invention.

Fig. 5 is a bottom plan view taken substantially on the line 55 of Fig. 2 on a slightly enlarged scale.

Fig. 6 is a section taken on the line I5--6 of Fig. 2 on a slightly enlarged scale, and

Fig. 7 is a vertical sectional view through the adjustable crank member forming part of my drive. I

Referring in detail to the drawings, my bolter comprises a'body portion II], which may be of conventional construction as far as its general arrangement is concerned, and which, of course, contains the sieves that are usually provided in the bolter. Said body portion may be provided with a frame that has a plurality of members running in various directions, such as the members II, upon which the bearings 12 and I3 for the shaft I4 are mounted. Said shaft l4 extends vertically of the bolter body between the two sections thereof lying in the space I5 provided between said bolter body sections, so as to be located substantially centrally of said bolter body. The bolter body is, .preferably, mounted so as to be capable of a gyratory motion, this being preferably accomplished by means of a plurality of Wooden reeds I6, which are provided substan- The shaft I4 has mounted thereon a pair of wheel-like members I8 and 19 adjacent the top of .the body l0 and a pair of wheel-like members and 2| adjacent the bottom of said bolter body I0. Each of the wheel-like members is of a similar character, and one wheel-like member of each pair is a duplicate of a wheel-like member of the other pair, In the arrangement shown, the wheel-like members I8 and29 are duplicates, and the wheel-like members I9 and 2| are duplicates. Each of said wheel-like members 20 and I8 are provided with a hub portion 22, which is provided with a key-Way cooperating with a similar keyway in the shaft l4 to secure the wheel-like members l8 and 20 in fixed position on said shaft I4 by means of a key 23, Each of the wheel-like members 19 and 2| is provided with a hub portion 24, which is provided with a set screw engaging the shaft I4 for clamping saidwheellike members I9 and 2| in position .on said shaft, so as to rotate therewith, said wheel-like members being, however, adjustable around said shaft,

as willbe obvious. A washer 26 may be provided tially atthe corners of the bolter body, being sebetween the head of the set screw and the hub portion 24, if desired.

Referring to Figs. 5 and 6, it will be noted that the wheel-like member 2| is provided with a plurality of spokes 21 extending from the hub to the rim thereof, and that a Weight 29, similar to a counterweight, is provided between certain of said spokes 21, said weight 28 lying at a spaced point from the hub 24 and extending from the rim of said wheel-like member2l inwardly a uniform distance, so as to form a weight of a given mass having its center of mass at a certain definitely spaced distance from the axis of the shaft I4. The wheel-like member 20, as far as its construction otherwise than at the hub is concerned, is a duplicate of the wheel-like member 2|, having spokes 27', similar to the spokes 21, and having a counterweight portion 28 that is a duplicate in size, location and mass relative to the axial center'of the wheel, of the weight member 28. The wheel-like member I9 is provided with spokes 29 and with a weight 39 extending inwardly from the rim thereof, which is similar in all respects to the weight 28 provided on the wheel-like member 2| and is, preferably, of the same mass and similarly located relative to the axis of the shaft I4 as said weight 28. Also the wheel-like member I8 is provided with spokes 29, similar to the spokes 29, and with a weight 39' that corresponds in size, location and mass to the weight 39 of the wheel-like member I9.

It will be obvious that thennbalanced condition of the rotating system made up of the wheellike members I8 and I9, and the rotating system made up of the wheel-like members 20 and 2I can be varied between a maximum, with the weight-like members-28 and 28', and the weightlike members 3|).and 3D in axial alignment with each other and a minimum, with the weight-like members 28 and 28' diametrically opposite each other, and the weight- like members 39 and 30 diametrically opposite each other. When said weight-like members 28 and 28, and 39 and 30', are diametrically opposite each other there will be no gyration of the body member I0 and any degree of adjustment of the amount of gyration between the maximum obtainable in the manner above referred to, and this minimum, or zero, gyration can be obtained by adjusting the wheellike members I9 and 2| relative to the wheel-like members I8 and 29 to get any desired relative position of the weights 28 and 28 and 30 and-30 about the axis of rotation of the shaft I4. Obvi ously a very fine adjustment of the gyratory movement of the bolter body Ii) can be obtained in this manner, and if the upper pair of members I 8 and I9 and lower pair of members 20 and 2| are carefully adjusted so that the relative position of the members !8 and I9 and of the members 20 and 2! is substantially the same, the unbalanced weight creating the gyration will ,be the same above and below said body, thus avoiding all stresses due to a lack of balance between the weight above and below the bolter body and producing a true gyratory motion about a-center or axis that is parallel to the drive shaft to be described below.

The shaft I4, with which the Weighted members rotate, is driven from the drive shaft 3!, which may be mounted in bearings in any desired manner, so as to extend vertically downwardly from above the bolter, through a driving means made up of a pair of relatively adjustable members 32 .and 33. The member 33 is provided with an upwardly extending stub shaft portion 34,

to adjustthe center of mass of each of said rotatable means relative to is center of rotation.-

l 2.-In a bolter, a flexibly mounted body portion 1 and means for producing a gyratory motion thereof, comprising rotatable means above and below said body portion, each of said rotatable means having its center of mass adjustable relative to its center of rotatiomand means for rotating said rotatable means comprising a drive shaft, a shaft upon which said rotatable means are mounted,

and a crank of adjustable throw connecting said shafts. i

3. In a bolter, a flexibly mounted body portion and means for producing a gyratory motion thereof, comprising rotatable means above and below said body portion, each of said rotatable means having its center of mass adjustable relative to itscenter of rotation, and means for rotating said said rotatable members having its center of mass eccentric to its center of rotation, said members being relatively adjustable to adjust the centers of mass thereof relative to each other.

5. In a bolter, a flexibly mounted body portion and means for producing a gyratory motion thereof, comprising rotatable means above and below said body portion, each of said rotatable means comprising a pair of rotatable members, and means for rotating the same about a common axis comprisin a drive shaft, a shaft upon which said rotatable means are mounted, and a crank of adjustable throw connecting said shafts, each of said rotatable members having its center of mass eccentric to its center of rotation, said members being relatively. adjustable to adjust the centers of mass thereof relative to each other to adjust the center of mass of each of said rotatable means relative to its center of rotation.

6. In a bolter, a drive shaft, a bolter body, flexible means for suspending the same, a gyratory shaft mounted for rotation on said body, an adjustable crank connecting saidshafts, and rotatable means on said gyratory shaft above and below said body portion, each ,of said rotatable 4 means having its center of mass adjustable relative. to the axis of rotation of said gyratory shaft.

7. In a bolter, a drive shaft, a bolter body, flexible means for suspending the same, a gyratory shaft mounted for rotation on said body, an adjustable crank connecting said shafts, and rotatable means on said gyratory shaft. above and below said body portion, each of said rotatable bolter body, a pair of wheel-like members mounted on said shaft adjacent the top of said body and a pair of wheel-like members mounted on said shaft adjacent the bottom of said body, each of said members being provided with a weight mounted eccentrically of said shaft, one of said members of each pair being mounted in fixed position on said shaft and the other member of each pair being adjustable around said shaft, to adjust the relative. position of said weights, and means for rotating said shaft to cause said bolter body togyrate. I v

v 9. In a bolter, a bolter body, flexible means for suspending the same to permit gyration thereof; a shaft mounted to rotatein bearings on said bolter body, a pair of wheel-like members mounted' on said shaft adjacent the top of said body and a pair of wheel-like members mounted on said shaft adjacent the bottom of said body, each of said members being provided with a weight mounted eccentrically of said shaft, one of said members of each pair being mounted in fixed position on said shaft and the other member of each pair being adjustable around said shaft, to adjust the relative position of said weights, a crank comprising a pair of longitudinally adjust able members, one of said members being fixed to said shaft, and the other of said members having a stub shaft projecting therefrom, a drive shaftand a universal joint connecting said drive shaft and said stub shaft. v

10. In a bolter, a bolter body, flexible means for suspending the same to permit gyration thereof, a shaft mounted to rotate in bearings on said bolter body, a pair of wheel-like members mounted on said shaft adjacent the top of said body and a pair of wheel-like-members mounted on said shaft adjacent thebottom of said body, each of said members being provided with a weight mounted eccentrically of said shaft, one of said members of each pair being mounted in fixed position on said shaft and the other member of each pair being adjustable around said shaft to adjust the relative position of said weights, a crank comprising a pair of longitudinally adjustable members having interfltting tongue and groove portions slidably engaging, one of said members being fixed to said shaft, and the other of said members having a stub shaft projecting therefrom, a drive shaft and a universal joint connecting said drive shaft and said stub shaft' 11. In a bolter, a bolter body,flexible means for suspending the same to permit gyration thereof, a shaft mounted to rotate in bearings on said bolter body about a substantially vertical axis, a pair of wheel-like members mounted on said shaft adjacent the top of said body and apair of Wheellike members mounted on said shaft adjacent the bottom of said body, each of said members being provided with a weight mounted eccentrically of said shaft, the Weights on each of said members being of substantially the same mass and shape and mounted the same distance from the center of rotation of the Wheel-like member on which it isprovided, one of said members of each pair being mounted in fixed position on said shaft and the other member of each pair being rotatable around said shaft to adjust the same to any position around said shaft, to adjust the relative position of said weights, means for fixing said rotatable member to said shaft for any position thereof and means for rotating said shaft to cause said bolter body to gyrate, comprising a vertical drive shaft and a universal joint connecting said first mentioned shaft and the lower end of said drive shaft tosuspend'said first shaft therefrom for freedom of movement with said body.

12. In a bolter, a bolter body, flexible means for suspending the same to permit gyration thereof, a shaft mounted to rotate in bearings on said bolter body, a pair of wheel-like members mounted on said shaft adjacent the top of said body and a pair of wheel-like members mounted on said shaft adjacent the bottom of said body, each of said members being provided with a weight mounted eccentrically of said shaft, the weights on each of said members being of substantially the same mass and shape and mounted the same distance from the center of rotation Of the wheellike member on which it is provided, one of said members of each pair being mounted in fixed position on said shaft and the other member of each pair being adjustable around said shaft to adjust the relative position of said weights, a crank comprising a pair of longitudinally adjustable members, one of said members being fixed to said shaft, and the other of said members having a stub shaft projecting therefrom, a drive shaft and a universal joint connecting said drive shaft and said stub shaft. l

13. In a bolter, a bolter body, flexible means for suspending the same to permit gyration therethe same in adjusted position. WILLIAM mounted eccentrically of said shaft, the weights on each of said members being of substantially the same mass and shape and mounted the same distance from the center of rotation of the wheellike member on which it'is provided, one of said members of each pair being mounted in fixed position on said shaft and the other member of each pair being adjustable around the shaft, to adjust the relative position of said weights, a crank comprising a pair of longitudinally adjustable members having interfitting tongue and groove "portions slidably engaging, one of said members being fixed to said shaft, and the other of said members having a stub shaft projecting therefrom, a drive shaft and a universal joint connecting said drive shaft and said stub shaft, said members being provided with means indicating the spacing of the axes of said shafts extending therefrom and having means for clamping E. NORVELL.

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