US942768A - Grinding-mill. - Google Patents

Description

J. BERCHA.

GRINDING MILL.

APPLICATION FILED MAY 4. 1909.

942,768. Patented Dec. 7. 1909 2 SHEBTs-SHEET 1 nmmtoz wi (Me-aces J. BBROHA.

GRINDING MILL.

APPLIOATIOR' FILED HAY 4. 1909. 942,768. Patented Dec. 7. 1909.

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' enacting grinding ro the drawings, 1 designates JOSEPH BERCHA, OF BEATRICE, NEBRASKA.

GRINDING-MILL.

Specification of Letters Patent.

Patented Dec. 7, 1909.

Application filed May 4, 1909. Serial No. 493,860.

T 0 all whom it may concern:

Be it known that I, Josnrrr BERCHA, a citizen of the United States, residing at Beatrice, in the county of Gage and State of Nebraska, have invented new and useful Improvements in Grinding-Mills, of which the following is a specification.

This invention relates to improvements in machines for crushing and grinding grain, the main object of the invention being to provide a construction of machine whereby the rapid and effective winding of grain may be effected without 0 ogging or heating of the grain durin the process of grinding, to rovide means or rinding either coarse or no grain to a suita le de rec of fineness, and to mount the grindin e ements in such manner as to permit of their ready adjustment for a fine or coarse action, to prevent their injur b excess adjustmentor the passage of oreign particles throu h the machine, and to provide for the reacfy removal and replacement of worn out parts without the removal of parts which are still good for service.

A further object of the invention is to )rovide a construction of grinding mechanism by which two or more different kinds of grain may be out admixture thereof, and to provide a crushing attachment for the mill by which car or head corn and bulky or unshelled grains may be reduced to a suitably comminuted condition prior to grinding, such attachment being susceptible of removal from the machine when its use is not reuired.

With these and other objects in view, the invention consists of the features of construction, combination and arran ement of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a vertical sectionthrough the machine taken on the line of the operating shafts. Fig. 2 is a similar section taken at right angles to the plane of section of Fig. 1. Fig. 3 is a perspective view of the hanger arm and the concave sections supported thereby, the latter being removed therefrom. Fig. 4 is a pierspective view of the Referring to the frame of the machine, on which is supground simultaneously withported a casing 2 divided by a central vertical partition 3 into counterpart vertical chambers or compartments 4 and 5 open at their upper ends for the feed of the grain thereto, and each provided with an outwardly and downwardly curved lower end terminating ina discharge spout or outlet 6 for the ground grain.

Arranged vertically within the rear of each chamber or compartment is a bracket or hanger arm 7 having an outwardl curved end 8 and provided at its upper on with a hooked portion 9,which projects outwardly through a slot 10 in the up er rear wall of the casing and forms a guide engaging said wall. To the outer or depending portion of this hook is ivotally mounted at its upper end an a justing screw 11 passing downwardl throu h an openin in a guide leg 12 an provi ed above an below the same with hand nuts 13 and 14 by which said screw may be respectively raised and lowered to correspondingly adjust the bracket arm.

The lower curved end of the bracket arm is formed with a concaved seat 15 separated into upper and lower portions by a transverse recess 16 and having at its lower end a transverse hearing or stop shoulder 17. This seat is adapted to receive and support a grinding concave composed of upper and ower sections 18 and 19, the upper section being adapted to occupy the upper ortion of the seat and bear against a shou der 20 at the upper end thereof, while the lower section 18 is adapted to occupy the lower portion of the seat between the lower edg of said upper section and the shoulder 1 The section 19 is clamped in position by the section 1 8, which latter is formed on its under side with a transverse rib 21 to fit within the recess 16 and is provided with acountersunk opening 22 for the passage of a screw or rivet 23, which is also adapted to pass through an opening 24 in the bracket arm to secure said upper concave section in position.

A drive shaft 25 extends throulggi (prenings in the partition and side we o the compartments and is journaled in suitable bearm 26 provided upon said walls. One end 0 this shaft carries a fly wheel pulle 27 by which the motion of the shaft 18 ba anced and to which power may be communi- :Lured thereby as well as to cushion an cated from a drive belt leading from a suitable motor. Mounted on this shaft within each compartment. is a gri iding roll or bur 28 arranged opposite the concave in the throat or passage between the lower end of the compartment and its discharge spout 6 and properly disposed with reference to the concave for the passage between them of the grain to be ground. The acting surfaces of the concave sections and the periphery of the roll are provided with grinding faces of zigzag construction, such as disclosed in the patent to Bercha and Chapman, #689,034, dated December 17, 1901 in order to revent undue spreading of the grain and c ogging and heating 0 the grain during the grinding action.

The concave is adjustable with relation to the bur both vertically and radially in order to regulate the size of the intervening grain passage and to dispose the grindin surfaces in pro er relation for a coarse, ne or interme iate grinding action. The vertical adjustment is effected by means of the screw 11 and hand nuts 13 and 14, by which the distance between the grinding surfaces may be regulated in an obvious'manner. In order to limit the downward vertical adjustment of the concave an angular stop bracket 27 is detachably and adjustably secured to the lower wall of the outlet 6 by a screw 30, which screw passes through a slot 31 in said late, and an angular washer 32 is clamped y the head of the screw'against the body of the bracket and bears against the u turned flange thereof to prevent indepen ent pivotal movement of said bracket. The upward vertical adjustment of the concave is limited by an adjustable stop screw 33 mounted upon a detachable chamber 34 secured u on the top of the casing by bolts 35, the racket/and screw serving to limit the adjustment of the concave in either direction beyond predetermined degrees so as to prevent possi lecontact between and injury to the grinding surfaces. The bracket arm is pivotally supported in the manner 1 described for a yie ng movement of the concave toward and from the'bur, and this yielding movement is cushioned and limited by a coiled spring 36 extending through an opening in 9. 0s 37 said opening having its outer end internall threaded to receive a screw plug 38 by w ich the ressure of the spring may be regulated. his 5 rin allows the concave to yield outwardly from the bur when a nut nail or other hard foreign object mingled with the grain is encountered, thus reventing the grinding surfaces of the rol i and concave from bein in te. e up all shoc s and jars from the sudden backward movement of the concave under conditions.

Arranged above and in parallel relation with the shaft 25 is a countershaft 39 which extends throu h openings in the oartition and sidesof tiie compartments an is journaled in suitable bearings 40 and provided at one end with an internal gear 41 meshing with a pinion 42 on the end of the shaft 25 opposite the pulley 27, by which said countershaft is driven from the drive shaft. Keyed upon the countershaft within each chamber or compartment is a rotary force feed device 43 provided with toothed arms 44 at diametrically opposite sides thereof to engage and force the rain down to the concave and grinding ro l, by which the material is fe to the grinding devices in an effective manner and banking of the same above the roll revented. Within the upper portion of each compartment is mounted. a sliding valve or plate 45 to control the feed of grain thereto, said late being movable outwardly through a s ot 46 in the front wall of the compartment and held in adjusted position by a set screw 47.

The detachable top casing 34 supports contained means for preliminarily grinding ear or head corn or other bulky and unshelled grains too large or coarse to be ground without reduction between the grindmg roll and concave. This casing is adapted to receive and support a sheet metal hopper 48 into which the material to be crushed and round is introduced. Secured by bolts or ot ierwise to the front and rear walls of the casing 34 are opposite sets of stationary crushing devices 49 and 50, the one having a concave and the other a convex body por tion or surface, and rovided respectively with sets of spaced r1 s 51 and 52 against and between which the material is crushed by the action of a crushin roll hereinafter described. The lower end of the crushing device 49 terminates in a bar 53 extending across the outlet at the lower end of the easing 34 to divide the dischargin crushed material into two streams for feed into the grinder casing 2, by which the material is revented from chokin in said outlet, and between this bar and tie concaved body of the device 49 slots 54 are also formed for the downward feed of the crushed material.

The side walls of. the casing 34 are provided with bearings 55 for a shaft 56 w iich is provided at one end with a gear 57 meshing with a gear 58 on the countershaft 39. b -which the shaft 56 is driven. On said s aft 56 within the crusher chamber is rigidly mounted a rotatin crushing roll 59 provided with annular ongitudinal series of crushing teeth or blades 60 arranged for movement in the rotation of the rolls between the crushing flanges of the concavcs or breaker plates 49 and 50, by which the corn or other material willbe loosened up,

carried downward and crushed or disintegrated between the teeth and flanges and surfaces of said breaker plates.

In practice, the grinding roll is rotated by the shaft 25 at a desired high rate of speed, while the gearing between said shaft and the counter-shaft is roportioned to retate the feeder 44 at a out one-third the rate of speed of the grinding roll, while the gears 57 and 58 are proportioned to drive the crushing roll at a still slower rate of speed, so that a proper amount of material may be fed to the grinding roll and an excess feed prevented. I

When it is not desired to use the crushing attachment, this part of the dlevice may be removed by detaching the bol s 35 and the grain may be fed directly into the compartments 4 and 5 or into any suitable type of ho per applied in lieu of the crushing attac ent.

It will be manifest from the foregoing descri tion that different kinds of grain may be ed into the compartments and ground simultaneously without admixture, and in practice any desired number of compartments and sets of grinding and coacting feed de'vices run be employed.

Having thus ully described the invention, what is claimed as new, is 1- 1. In a grinding apparatus the combination of a casing having a slot in the upper end thereof, a grinding roll in the lower portion of said casing, a vertical bracket arm having a curved lower end partially surrounding the roll and a projection at its upper end extending exteriorly through said slot, a concave carried by the curved lower end of the arm, an adjustable support on the exterior of the casing to which said projection is pivotally connected, and a spring upon the casing yieldingly backing the curved end of the arm.

2. In a grinding apparatus, the combination of a casing, a grinding roll at the lower end of the casing, a bracket arm extending vertically within the casing having a curved lower end carrying a concave arran d adjaccnt the roll, a vertically ad'ustab e support pivotally connected with t e upper end of the arm, a spring upon the casing an yieldingly backing the curved end of the arm, and an adjustable stop for limiting the upward vertical adjustment of the arm, and an adjustable stop for limiting the downward vertical adjustment of the arm.

3. In a grinding apparatus, the combination of a casing having a slot at the u per end thereof, a grinding roll journale in said casing, a bracket arm vertically arranged within the casing and having a lower-curved end carrying a concave for coaption with the roll and provided at its upend with a projection extending through said slot, a screw stem su ported exteriorly of the casing and pivotal y connected with said rejection, adjusting nuts for raising and owering said stem, and a sprin arranged upon the casing and yieldingly backing the curved end of the bracket.

4. Ina grinding apparatus, the combination of a casing having a end thereof, a grinding roll within the easing, a vertically disposed bracket arm within the casing having a lower curved end partially surrounding the roll and having a projection at its upper end ext/en ing throu h said slot, a concave carried by the curve end of the arm, an adjustable support upon the exterior of the casing pivotally connected with said projection, a concave carried by the curved end of the arm, adjustable stops engaging the upper and lower ends of the arm or limiting the vertical movements thereof, a spring upon the casing yieldingly backing the curved end of the arm, and means for varying the tension of said spring.

5. In a grinding apparatus, the combination of a casing having a slot therein, a grinding roll within the casing, a vertical bracket arm within the casing having a lower curved end partially surrounding the roll and having a projection at its up er end extending outwardly through said s ot, a sectional concave carried by the curved end of the arm, a bracket on the exterior of the casing, a threaded rod carried by the bracket and pivotally connected with said rojection, nuts upon said rod above and be ow the bracket for vertically adjusting the rod, a spring upon the casing yieldingly backing the curved end of the arm, means for regulating the resistance of said spring, and adjustable stops engaging the upper and lower ends of the arm for limiting the vertical movements thereof.

6. In a grinding apparatus, the combination of a casing, a grinding roll journaled horizontally therein, a vertically arranged bracket arm having a curved lower end partially surrounding the roll and provided with a grooved seat, a concave composed of sections detachably secured in said seat, means for yieldingly backing the curved end of the bracket arm, and means pivotally connecting the upper end of said arm to the casing, said means embodying means for ad justing the arm in a vertical plane.

7. In a grinding apparatus, the combina: tion of a casing, a grinding roll therein, a bracket arm having a grooved lower end, means for pivotally supporting said bracket arm, means for verticall adjusting the same, a concave detach bly fitted in the grooved portion of the arm, and means for yieldingly backing the arm. i 8. In a grinding apparatus,

the combinaslot in the upper,

' having a concaved tion of a casing, grinding mechanism therein. spaced parallel stationary breaking de- Vices" within the casing above said grinding mechanism, one of said breaking devices body portion provided with spaced breaking flanges and the other having a convex body portion provided with oppositely arranged spaced breaking flanges, and a rotary crusher arranged between said breakin with fingers movab e between the flanges thereof.

In testimony whereof I aflix my signature in presence of two witnesses.

JOSEPH BERCHA. Witnesses E. G. DRAKE, JOHN MCCREA.

devices and provided 10

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