US1233911A - Vertical grinding-mill. - Google Patents

Description

T..R|OS.

VERTICAL GmNDING MILL; H APPLICATION FILED APR. 191.6.

Patented. July 17, 1917.

2 SHEETS-SHEET l- R O WH m m T T. RIUS.

VERTICAL GRlNDlNG MlLL. MPL10/umn FILED APR. 17, i916.

Patentedl July 17,' 1917.

snEETs-sHEET 2.

INVENTOR WITNESSES:

THOMAS RIOS, 0F SAN' FRANCISCO, CALIFORNIA.

VERTICAL GRIN DIN G-MILL.

Specification of Letters Patent.

Patented July 1 7, 1917.

Application iled April 17, 1916. Serial N0. 91,609.

To all whom t may concern.'

Be it kn Improvements in Vertical Grinding-Mills, of which the following is a specification.

is invention relates to a grinding mill.

One of the objects of the present invention is to provide a grinding mill of the vertical type, which is struction and grinding disks, together with an automatic feeding mechanism for same and to provide a yielding support for one of the disks, to prevent injury to same if solid particles such as stones or pieces of metal should happen to enter with the product to be ground.

Further objects will hereinafter appear.

he invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings in whichpartly in secgrinding face ind a base 2. Formed on one side is a pair of journals 3, and extending through said journals is a shaft 14 on the upper end of which is secured by means of a set screw 16, a disk 15. Suitably secured on the upper face of said `disk is a grinding disk 417 provided with four definite circuand co-acts evenly distribute the product to be lar rows of grinding teeth such as indicated at 21, 22, 23 and 24. These teeth extend across said rows and the rows are so armediate rows being coarse inner row to he grain is thus iinally discharges in a tally disposed driving shaft 4 journaled in bearing members 7 carried by the base section 2 of the frame. The shaft 4 may be driven from any suitable source of power rect alinement with the shaft 14 is a feed hopper 20 and secured on the lower end of said feed hopper is a stationary plate 19 to which is secured a grinding disk 10 constructed similar to the one indicated at 17. 75

The outer edge of the plate 19 is turned outer edges of the disks 10 and 17 so as to deflect the ground material from the disks into a receptacle not shown. See Figs. 5 and 6. with disks 10 and 19 are supported by a bracket arm 30, adjustably secured by means of set Screws 31 to a ii bracket arm 30, and stationary grinding disk to be to and from the lower grinding disk also permits the several when it is 17 and parts to be endesired to clean a feed auger 18. his auger is centrally disposed with relation to the feed hopper and is sufliciently long to extend a considerable distance up into the feed end of the hopper. The interior is provided with spiral ribs 18', the pitch of which is opposite to the pitch of the auger. The auger revolves in unison with the shaft 14 and attached grinding disk 17 with the spiral ribs 18 hopperl so as to automatically deliver and ground upon a horizon- Arranged in di- The hopper 20, together Secured to the upper end of the of the hopper in the j a pivotally vit L tween the grinding with relation to the gear.

over the innermost teeth of the grinding disks. The intermediate shaft 14 carrying the lower grinding disk 17 is yieldably mounted to permit p articles ofmetal lor other hard material entering with the grain to discharge without breaking the burs or grinding teeth of the disks. i This is accomplished as follows: Pivotally mounted Aas at 11 in the base frame 2 is a lever 9, upon which is .adjustably mounted a weight 13V. The inner end of the lever is provided with mounted thrust bearing 8 which engages the lower end of shaft 14. The beveledgear 6, mounted on the lower end of the shaft 'is slidably keyed to the shaft to ermit longitudinal movement of the shaft It can therefore be seen that anyhard article entering 4between the disks will merely force the lower disk 17 with connected shaft 14 in a downward` direction,'this being permitted as the lower disk is only held against the upper disk by means of the weighted lever 9 and the thrust bearing 8. The amount of pressure brought to bear by the lower disk against the upper diskmay be varied by adjusting the position of the weight 13. The grinding mill vhere illustrated is particularly constructedV for grindingv niXtamal. Nixtamal is a product produced by grinding half-cooked corn while in a wet condition. The doughlorniixture thus produced is particularly used for baking tortillas. In actual practice it has 'been found advantageous to grind the half-cooked corn in one operatiOfIly as yregrinding the same tends to destroy the flavor and aroma `Contained in the corn.

'The operation will be as follows: The

.half-cooked corn is first placed in the hopper 20. Power is then applied to the pulley 8b and is thus transmittedY through the shaft 4 and the gears 5 and 6 to revolve the shaft 14v and the lower grinding disk 17. The feed auger will then revolve in unison with same and will consequently force the corn through the lower end 'of the hopper and out bedisks. The first set of teeth 21 williirst break or tear up the individual kernels, the second teeth will break the productV still finer; the thirdand fourth sets will similarly reduce the corn and will finally permit same to discharge'in a finely ground condition around the outer periphery of the disks.

By referring to Fig. 8, it twillvbe seen that the` lower disk 17 revolves in thedirection of arrow a. This causes the teeth to pull 'away from' each other and therefore to act reverse. This movement tends to eliminate lthe cutting or breaking action usually employed other grinding' mills and instead produces a mashing tendency which is particularly beneficial in grinding ,nixtamal receiving hopper or pan' not here shown,

' disks,

may be placed directly below as these are mounted above any `of the lubricated bearings indicated at 3 that no oil or foreign enter 0r mix with the discharging product. T he yieldable mounting provided for the lower disk positively prevents breaking of the grinding burs formed on the disks and furthermore provides a means whereby the pressure between the disks may be adjusted to suit various grades of materials.

The machine as a whole is simple and substantial in construction and as the upper hopper with connected grindingdisk can be removed by simply releasing the set screws 31, it can be seen that all parts are easily accessible for cleaning purposes or otherwise.

The materials and finish of the several parts of the invention may be suoli as the judgment and experience of the manufacturer may dictate.

I wish it understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims, and that l do not wish to limit myself to the specific design and construction here shown.

Having thus described my invention, what 1 claim and desire to secure by Letters Patent `isv u 1. In a grinding and 7, it can be seen matter can possibly mill, a pair of grinding means for rotating one of said disks with relation to the other, and a deliector ylate extending downwardly over the edges of the disks to deflect the ground material downwardly and away from the disks as it passes from between the disks.

2. ln a grinding mill, a frame formed with an upwardly projecting flange, a bracket having inturned side flanges slidably engaged over and with the side edges of the iange, a set screw projected through one of said inturned flanges of the bracket andV impinging against the adjacent side edge of the flange, a grinding disk secured to said bracket, and a grinding disk journaled in the frame and cooperating with the first named disk.

3. Tn a grinding mill, a frame, a rotatable grinding disk journaled in said frame, a bracket slidably mounted on said frame, a grinding disk secured to said bracket in grinding relation to said rotatable disk, means for securing said bracket to said frame with the disks in proper grinding relation to each other, a hopper on said bracket above the disk, spiralv ribs in the interior of said hopper, and an auger extending from the lrotatable .disk into said hopper in co-acting relation to said ribs.

4. In a grinding mill, a frame, a hopper i having a base plate rigidly connected thereto and provided with a downturned circular ange, a grinding disk secured to the under face of the base plate and spaced at its periphery from the circumference of said flange, a lower grinding disk extending upwardly within said flange, and means to rotate one of the disks witnesses.

THOMAS RIOS.

Witnesses:

FRANCES V. COLE, W. HEALEY.

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