US8670A - blasdell - Google Patents

Description

Nera ra H. BLASDELL, OF NEW YORK, N. Y.

MILL FOR GRINDING QUARTZ.

Specification of Letters Patent No. 8,670,l dated January 20, 1852.

T0 all whom t may concern Be it known that I, I-IoRA'rIo BLASDELL, of the city and county of New York and State of New York, have invented a new and useful Improvement in Metallic Mills for Reducing GOldQuartz Rock to a Flour, called Blasdells Gold-Quartz Flourer, and I do` hereby declare the following to be a full and clear description of the construction and operation thereof, reference being had to the annexed drawings, making part" of this specication'.

Figure l represents a side elevation of the mill. Fig. 2 is a vertical central section t-hrough the same. Fig. 3 is atop view of the semispherical runner, with its channeled circular ring plate. Fig; 4 is an inverted View of the stationary concave, and channeled circularpring plate. Fig. 5 is an elevation of Fig. 3. Figi 6 is avertical'section of the case or shell- 'showing the hopper,

\ throat, and grooved! concave.

Where the same `letters of reference occur onthe several figures they indicate the same' parts.

The arrow Fig. 3 shows the direction of the turning of the runner.

The distinguishing feature of improve.- ment consists in so constructing and coinbining the several parts of the mill, that the quartz rock shall be received and cracked or reduced so as to pass between the grooved surfaces of the semi-spherical runner, and concave, wherein the quartz is held and the particles thereof made to `act by friction directly upon each other, and thus effect its own pulverization, and allowed to descend or case is mounted a frame F, in the upper;

portion whereof are the journal boXes of a horizontal shaft G, on one end of which is a pulley H, from which the `band leads to the driving power, and on the opposite `end is a fly or balance wheel I, for equalizing the motion of the mill. Near the pulley H, on

the shaft G, is a bevel pinion J, matching with a horizontal bevel gear wheel K, on the upper end of the spindle or shaft L.

M is a lever having its fulcrum in the spider frame at N, and furnished with a screw rod O, projecting through a pillar b and provided with a screw nut (o) whereby the wrought iron step or ink for the shaft L, and mounted upon the lever M, is raised or lowered for adjusting the se1nispherical runner to the concave.

P is a spider frame attached to the bed piece A, for retaining the wrought iron step or ink in a vert-ical position. Q, is a horizontal plate for retaining the upper end of the shaftin an upright position. The throat of the case or shell is furnished `with a' chilled iron throat or hollow cylinder R2 having its inner surface cast with vertical channels and convex swelling as shown in Fig. 4, and having ribs r on its circumference which fit corresponding recesses in the throat and thus prevent the hollow cylinder from turning. The semi-spherical concave E, is furnished with a separate chilled iron ring E2 being a section of a sphere near the diameter thereof, and fitted securely into va corresponding recess cast around the larger diameter of the concave E, and held in its place by ribs fitting recesses in the shell. This separate chilled ring is provided with grooves l on lines drawn from the vertex to the base, and coincident with similar grooves formed in the upper `portion'of the concave-each groove beingof a'concave form.

B is a flat chilled 'iron ring plate bolted to the under surface of the horizontalflange of the shell or case B, and fitting against the lower edge of the grooved ring E2'and by which thelatter is held in its place. This ring plate R, is channeled radially on its under surface Fig: 4 to a sufficient depth the sides (c) of said channels being tangential to the dotted circle f Fig. 4. These channels are made slightly wider neXt to the concave chilled grooved vring E2 than at the circumference of the ring plate, for receiving the pulverized quartz as it descends from the concave. The heads of the screw bolts which confine the chilled ring` plate R are flush with the bottoms of the channels and the nuts are screwed down upon the flange of the case B.

S is a chilled iron nut fitted to the square portion of the shaft L, and turning in the chilled iron ring W, fitted into a recess in the runner T, and held securely thereon by projections and having grooves coincident with those in the runner. On the projecting flange U of the runner there is confined by screw bolts t a flat chilled iron ring X having radial channels in its upper surl face one of the sides e2 being tangential to the dotted circle f2 F ig. 3,-and of the form of the channels of the stationary ring R.

; The inner or smaller diameter of the ring plate X, fits against the periphery or larger diameter of the convex grooved ring W,

'whereby the latter is held securely in its place on the runner. There is a space beitween the outer diameter o-r periphery of the ring plate X and interior of the case or curb B for the passage of the quartz after being reduced to a flour. The channeled surfaces of the flat ring plates R X, are

' a nearly in contact with each other-and the ohannels of one plate cross those of the pther diagonally during the rotation of the runner, whereby the tangential sides (e e2) of said channels are made to have the effect @of checking the passage of the quartz through the channels and working or whirling the quartz centrifugally between the ring plates R X and allow it to pass over the edge of the rotating ring plate X.

The employment of the separate chilled iron grooved rings E2 W, and the horizontal circular channeled plates R X in combination with the semi-spherical runner and concave enables the operator to renew these portions when worn away without the necessity of renewing any other part of the mill, and by which arrangement of parts a mill may be used a long' time, the difiiculty of removing a worn out ring and replacing it with one not worn being quite inconsiderable.

Operation of my mill-The gold quartz rocks in suitable pieces are put into the hopper, and the mill being put in motion by steam or other adequate power descend grooves of the chilled concave and convex rings E2 W, wherein the prisms and other shaped pieces of gold quartz are held and whirled around with great speed and force against each other, until reduced to such a degree of fineness as to permit the same to pass into the radial shallow channels of the flat rings R X which revolve nearly in contact with each other, wherein the fine gold quartz prisms are rubbed against each other until the particles of gold therewith mixed, shall be reduced to a fine powder, and thrown gradually from the periphery of the revolving ring or plate X against the interior diameter of the circular curbrB from whence it descends to a receiver t be removed and the gold separated from the quartz flour in the usual manner.

From the foregoing description it will be perceived that the'pulverization of the gold quartz rock is not performed by ribs, projections, or edges of the iron runner, concave, rings or plates, but is effected 'by holding the pieces or particles of gold quartz in the grooves of the semi-spherical concave E E2, and runner and between the horizontal circular rubbing ring plates R, X, thus` `producing great frictional resistance, and

rubbing quartz against quartz until reduced to a fine dust powder or flour-the grooves in the upper portion of the cast runner and concave are designed to yconduct the pieces of quartz to the grooves of the chilled rings as they are reduced to the proper fineness. In order to reduce the gold quartz to a still finer powder it is only necessary to turn the thumb screw c to the right which will have the effect of raising the lever M, and with it the lower circular plate X toward the' upper plate R, between whose surfaces the operation of powdering the gold quartz takes place.

Having thus described my mill for reducing gold quartz rocks to a powder or flour, what I claim as new and desire to secure by Letters Patent, is

The combination of the chilled hollow cylinder R2, and nut S of the form represented, and the grooved chilled ringsW E2, and horizontal circular channeled chilled ring plates R X, with the grooved concave E and'runner T for breaking, pulverizing and powdering gold quartz rockthe said chilled rings and plates being arranged and operating in the manner and for the purpose herein fully set forth.

In testimony whereof I have hereunto signed my name before two subscribing witnesses.

H. BLASDELL.

Witnesses P. F. PRUCKNEY, A. E. H. JoHNsoi'v.

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