US1798676A - Alfalfa mill - Google Patents

Description

March 1931- P. v. JALl E T AL ALFALFA MILL Filed Feb. 26, 1930 2 Sheets-Sheet 1 Inventors Q 2 V r5 [1' E2216 Z5179? lol A ttomey Patented Mar. 31, 1931 V UNITED STATES PAT E'NT OFFICE PETER v. JALI AND FRED c. woRRALL, or PORTLAND, OREGON ALFALFA MILL Application filed February 26, 1930. Serial No.- 431,495.

This invention relates broadly to pulverizing mechanism and more particularly to an alfalfa mill.

The primary object of this invention is to '5 provide a mill of the character above mentioned, including an especially shaped casing or housing for receiving the alfalfa or materail to be pulverized together with a rotor arranged within the housing having a plurality of hammers associated therewith, the

hammers and the side walls of the casing being so arranged relatively to one another as to insure a thorough pulverizing of the maerial to be so treated.

A still further object of the invention is to provide a pulverizing device of this character, which comprises but comparatively few parts, can be readily and easily set up, will be thoroughly reliable, practical, and efficient in operation, and otherwise well adapted for the purpose designed.

Other objects and advantages of the invention will become apparent during a study of the following description, taken in connection with the accompanying drawings,

wherein:

Figure 1 is a front elevatio-nal view of a mill embodying the features of the present invention.

Figure 2 is a vertical longitudinal sectional view taken therethrough, substantially on line 22 of Figure 1.

Figure 3 is a vertical transverse sectional view taken through the device for IHOIGClQflI- ly showing the structure of the side walls and their relation relative to the pulverizing hammers.

Vith reference more in detail to the drawings, it will be seen that our improved mill comprises a base or platform 5 upon which is mounted a grain receiving housing designated generally by the reference character 5. As suggested in Figure 2, the base 5 is of oblong or elongated rectangular configuration and inwardly from the longitudinal 7 side edges thereof rises the front and rear walls 6 and 7 respectively of the housing, said 'walls rising in spaced parallelism. I

The said front and rear walls are connected through the medium of the angular attaching connecting walls 88. The connecting walls are identical in construction, to advantage comprise a vertical intermed tion 9, a downwardly and inw bottom forming wall section forming wall sections 10 bottom designated generally and as shown in Figure 3, each of said walls iate wall secardly directed 10, the bottom meeting at their lower ends to form a substantially V-shaped by the refer- V ence character 11 forthe housing.

The said connecting walls body the wall section 8 further em- 12 extending upwardly opening 1 1 at the top of said h wall section 13 providing a restricted outlet ousing.

Each of the sections of the walls 8 at their ends are rear walls 5 means such as provided with outwardly directed flanges 15 secured to the front and and 6 by suitable fastening the nut and bolt connections 16.

R1sing from the restricted outlet opening 14 in the top of the housing is an tube 17.

The front wall 5' is provided outlet pipe or with an intake or filling opening 18, as shown to advantage in Figure 2. If desired a mate or tube 19 at its lower end may registry with the intake o-peni ducting the material, such as like, into the housing to be pulverized in a rial feed chute be disposed in ng 18 for conalfalfa or the manner hereinafter to be more fully set forth.

Said. front wall 6 adjacent the bottom thereof is provided with an outlet opening 19 to permit access to be had of the housing designated by the reference to the interior at the bottom thereof. Mounted within the housing,

is a rotor character 20,

which rotor is of circular configuration, and 1S provided with, and pro ect1ng from opposite ends thereof stub shafts 21, which shafts 21 extendthrough the front and rearwalls of the housing, said stub shafts being j0urnailed in suitable bearings the housing, the bearings suitable brackets 2323, suita the front and rear walls' 6 and 7 22 eXteriorlyof being supported on bly secured to ward to the left r 'Further, -the pecuharshape afforded the housing by the walls 8 and tll6"10tflbl01l of The rotor 20 has a plurality of arms 2 L projecting radially therefrom and pivotally secured to the ends of these arms are pulverizing hammers, designated generally by the reference character 25.-

Since each of these hammers are identical in construction, it is thought that a detailed description of one will suffice. Each of the said hammers comprises a pair of relatively short angle irons 26 with theircorresponding ends disposed one to each side of the arm through the medium of a bolt 27 extending through said ends and the end of the'arm, and a nut 28 is threaded on the end of the bolt for securing the ends of the angle irons to the outerends of the arms, as clearly suggested in Figure 2. i i A cross bar or connecting plate 29 is boltet as at 30 at its opposite'ends to the flanges 31 of the angle bars 26 completing the structure of the hammer. It is to be noted that the longitudinal edge of the connecting bar 29 is flush with the ends of the angle bars 26,

the web of the connecting bar or plate 29 being substantially equal to more than half the'length of said angle bars 26.

The spindle 21 of the rotor extending through the rear wall 7 of the housing has splined thereto a suitable drive fwheel 32 whereby rotative movement is imparted to the rotor from any suitable source of power.

An arcuate shaped screen extends between the connecting walls 8 and has its ends secured to the upper converging edges of the wall sections 12 as at 34.

It is to be noted that the hammers :25 pivotally carried to the arms 2% of the rotor, have their outer ends terminating close to the wall sections 9, 10, and 12, and especially is this fact to be noted with respect to the'inclined bottom forming walls 10 since it will be appreciated that during the rotation of the rotor in a clockwise direction, the downward swinging movement of the hammers 25 upon their pivots will enable the hammers to strike with the maximum force, with a terrific blow on thematerial to be pulverized resting on the walls 10 and this being so since it is obvious that this swinging or pivotal connect-ion of the hammers lends greater impetus to the hammers during the rotation of the rotor than if the hammers were fixedly secured to the outer ends of the arms 24; of the rotor.

Another feature tobe noted, is in the particular shape of the connecting walls 8 since such shape of the walls'in conjunction'with the rotation of the rotor and t ie hammers 25 will result in suitable friction being formed'at the automatically assist in drawing thematerial to be pulverized into the housing and downofthe housing.

24 and pivotally secured thereto 'is susceptible to changes v on said filling or intake opening 18 to 7 the rotor 20 will cause a suction to the right within the housing and draw the pulverized alfalfa or material up through the screen 33 to exit through the outlet opening it.

Furthermore, through the medium of the inclined sections 10 forming the V-shaped bottom 11 of the housing, will permit hard objects, such as metal and other material unsuitable to be pulverized to drop through the bottom of thehousing and there be removed through the opening 19 in the'bottom of the front wall 6.

It will also be appreciated that in having the hammers pivotally secured to the ends of the arms 24, the hammers coming in contact with any article which is too hard to pulverize will of course be swung about their pivots to pass over such articles and in this way eliminate any danger of thehammers being torn away from their connection to the rotor arms 2 f as is apparent.

It is thought that from the foregoing des ription, taken in connection with the accompanying drawings, a clear understanding of theoperation, construction, utility and advantages of an invention of this character will be had without a more detailed description. Even though we have herein shown and described the preferred embodiment of our invention, it is to be understood that the same fully comprehended by the spirit of the invention as herein described, and the scope of the appended claims. Having thus described our invention, what we claim as new is: I

'1. In a pulverizer of the class described, a casing including front and rear walls, side walls inclining downwardly and inwardly at their lower ends to provide a V-shaped bottom, and inclining upwardly substantially and inwardly at their upper portions, the upper edges of the side walls terminating in spaced relation to provide a restricted outlet, said front wall being provided adjacent its upper portion with an inlet opening, a rotor in said casing, radial arms rotor, and pulverizing hammers pivotally secured to the outer ends of said arms. 5

2. In a pulverizer of the class described, a casing comprising parallel front and rear walls, side walls connecting said-front and rear walls, each of said side walls comprising relatively vertical sections, downwardly and inwardly inclined'bottom forming sections, upwardly and inwardly inclined "sections inclining upwardly from said vertical sections,

3. In a pulverizer of the class described, a casing comprising parallel front and rear walls, side walls connecting said front and rear walls, each of said side walls comprising relatively vertical sections, downwardly and inwardly inclined bottom forming sections, upwardly and inwardly inclined sections inclining upwardly from said vertical sections, said last mentioned section terminating in an upwardly and inwardly directed section, said last mentioned sections of said side walls terminating in spaced parallelism to provide a restricted opening in the top of said casing, a rotor in the casing, and a plurality of radially disposed pulverizing hammers mounted on said rotor, the front wall of said housing having an opening in a portion thereof whereby material to be pulverized may be drawn into the housing to provide a suction created in the housing during the rotation of said rotor.

4. In a pulverizer of the class described, a casing comprising parallel front and rear walls, side walls connecting said front and rear walls, each of said side walls comprising relatively vertical sections, downwardly and inwardly inclined bottom forming sections, upwardly and inwardly inclined sections inclining upwardly from said vertical sections, said last mentioned section terminating in an upwardly and inwardly directedsection, said last mentioned sections of said side walls terminating in spaced parallelism to provide a restricted opening in the top of said casing, a rotor in the casing, and a plurality of radially disposed pulverizing hammers mounted on said rotor, the front wall of said housing having an opening in a portion thereof whereby material to be pulverized may be drawn into the housing to provide a suction created in the housing during the rotation of said rotor, said front wall having an opening in the bottom thereof whereby access may be had to the bottom of said housing, an arcuate shaped screen disposed across the discharge opening in the top of the housing transversely of the housing.

In testimony whereof we aflix our signatures.

PETER V. J ALI. FRED O. OR-BALL.

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