US1039326A - Attrition-mill. - Google Patents

Description

A. SGHROEDER.

ATTRITION MILL.

APPLIOATION FILED JUNE 17, 1912.

1,039,326. Patented Sept. 24, 1912.

Il |y i jfw/ff ADAM SCHROEDER, F BARTON, WISCONSIN.

ATTRIIION-MILL.

Specification oi Letters Patent. Application led June 17,: 1912. Serial No. 703,994.

Patented Sept. 24, 1912.

To 'allflbhowi it may concern." .A s

Be it known that I, ADAM SCHROEDER, a

i citizenof the United States, andresident off of a fixed brid Barton, in the county of Washington and; State of Wisconsin, have invented certaln; new and useful Improvements in Attrition-y 'Mills; and I do hereby declare that the fol-g 'lowing ris a full, clear, and exact description; i thereof. ,10.

' 'obj'ect being to provide as'imple,

IMy invention refers to4 attrition mills,h.itlsi Velfective and economical ,means for effecting a tight.y

'jlo'nt between the non-adjustable rindmgl "disk Iand delivery throat ofthe mill '.whereby the finest seed or analogous mate-i rialmay be 4delivered between the grinding surfaces 'of'Y he'lrespective disks, wlthout: leakage of said material between the disk and delivery throat, the joint b'eiing'rendered practically airsti'gh't by nested engagement? 'ng collar'and a sealing ring that is carrie bythe adjacent grinding .disks-.1 The :constructionand arrangement of the bridging collar and sealing disk are such that the same may readily be attached-temills ofthe' general character to which my invention refers.

With the above vobject in view the invention consists in certain peculiarities of construction and combination of parts as set forth hereinafter Vwith reference to thev accompanying drawings and subsequently clalmed.

In the drawings Figure 1 represents a sec- :tional elevation of a portion of an attrition mill embodying the features of my invention, the view showing parts' broken away and parts in full for clearness of illustration; Fig. 2, a detailed sectional face view of a portion of the sealin ring and collar, the vsection being lindicate by line 2-2 of Fig. 1, and Fig. 3, a fragment of the sealingA ring lookin at the reverse side from that shown in Fig. 2. w

Referring by characters to the drawings, 1 represents a housing having a wall 1 that is provided' with a circular delivery throat 2, which throat is incased by a hopper 3 that forms part of said housing. Journaled in the housing are the usual alined oppositely r rotative power shafts 4, 4, which power shafts carry inder disks 5, 5, respectively, the grinder isk 5, in conjunction with its shaft, being in this form of mill longitudinally adjustable (by mechanism" not shown) for the purpose of regulating they able grinding disk 5 is formed with a rim connected by spokes to a hub portion whereby an openmg 1s provided through which l grade of milled material. 'Ihenon-adjusti the materialpasses to the grinding surfaces, said non-adjustable disk being in 'uxtaposition to the delivery throat 2. Eac of these dlsks 1s also provided with, rinding plates 6, 6 respectively, of any desired ty e, it being understood that ,all of the a ove described mechanism is usual to grinding lmills "if of the character mentioned.

A bridging collar 7 is secured to the houslng wall 1 by means of bolts 7 which engage said housing wall and pass through apertured .ears 8 of the collar, .the bolts be- I' ing of suchy dimensions relative Ito the ear apertures as to permit adjustment of .the collar in all directions, whereby 'it can be set concentric. with the non-adjustable .grinding disk 5.l --The 'collar 7 is provided with a :i

horizontally disposed iiange 49 havin .an outer 'taperedfaceland shoulder; that orms al concentric seat about the disk axis, it be` Vingunderstood that-'the inner face of the collar and its flange portion extend inwardly from the throat 2 and form a feed channel over which the 'material kto be ground passes in its travel to the inner surface of the rim portion of the grinding disk. Secured to the rim portion of the grinding disk 5 by 'bolts 10 is a sealing ring 11, which rin due to its thickness, is oifset from the disr and provided with a tapered inner circular face for nested engagement with the outer tapered face of the collar ange 9, the inner tapered face bengapproximately the same diameter` as the inner face of the rim portion of the disk to which it is attached. lBy this construction it is apparent that the material to' be ground will ow over the {ianged collar and closed joint between it and the sealing ring, through the spider portion of the disk, to the grinding lates of the pair of disks, the said material eing ground and discharged in the usual manner. lFurther-4 more by the sealed joint thus formed between the rotatory disk members and fixed collar, material cannot sift therethrough, nor

is it possible for the current of air induced to pass out into the machine in an vunground condition and thereby injure the grade of milled material, while with the arrangement of collar and ring as described this objectionable feature is entirely overcome, it being apparent that when the nested joint between said ring and collar becomes Worn that the wear can be readily taken up by movement of the shaft 4 longitudinally, and thereafter locking said shaft by a set collar l2, such as shown in connection with the shaft or other suitable mechanical arrange ment. It will also be observed that by employin an apertured ear in connection with the bridgingl collar as described, said collar may be so adjusted to the Wallf of the housing as to be self centering with respect to the rotatory ring which is carried by the disk 5.

In order to economize space the outer face of the ring 11 is preferably provided with countersunk seats through which the apertures for the retaining bolts l0 pass and by this countersunk arran ement clearance for :the nuts of the retaining bolts 10 .is had, whereby said nuts are not rendered liable to contact with the adjacent face of the bridging collar.

has been foundy that where In practice it fed to the grinding mechawet grains are nism there is some liability of the grain clicking at the mouth of the hopper and to overcome this liability I provide a spiral flight 4 which is securedv to the shaft 4 within the hopper opposite the delivery throat 2. This flight forms an agitating device for the moist grain and will positively feed the same to the grinding mechanism.

I claim:

Inan attrition mill having a housing provided with a delivery throat, alined oppositely rotative power shafts and grinder disks carried thereby; the combination of a bridging collar adjustably secured about the delivery throat of the housing, the collar being provided with a flange having an outer tapered circular face, and a sealing ring secured to one of the disks, the sealing ring being provided with an inner tapered circular face for engagement with the outer tapered circular ace of the collar flange.

In testimony that I claim the foregoing I have hereunto set my hand at Bartonin the county of Washington and State of Wisconsin in the presence of two witnesses.

ADAM SCHROEDER.

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