US43248A - Stamping-mill for quartz - Google Patents

Description

WHEELER E HURTAUNG. i

Stamping Mill.

No. 43,248. Patented )une 21,1864.

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UNITED STATES PATENTN OFFICE.

ZENAS WHEELER, OF SAN FRANCISCO, AND O. K. HOTALING, OF GRASS VALLEY, CALIFORNIA.

sTAMP'lNe-MILI. FoP. QUARTZ.

Specification forming part of Letters Patent No. 43,218, dated June .21, 1864.

To all whom it may concern:

Be it known that we, ZENAs WHEELER, of San Francisco, in the county of San Francisco and State of California, and G. K. HOTALING, of Grass Valley, in the county of' Nevada and State of California, have invented certain new 'and useful improvements in stamping-mills for reducing gold-bearing quartz to a powder suitable for amalgamating purposes; and we do hereby declarethat the following is a full, clear and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 isa front elevation of our invention, partly in section; Fig. 2, a side sectionalview of the same, taken in the line a: x, Fig 1; Fig. 3, a horizontal section of a portion of the same, taken in the line y y, Fig. 1; Fig. 4., a horizontal section of a portion of the same, taken in the line z a, Fig. 2.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates, first, toA a certain means employed for taking the powder or dust from the mortar-chamber, and conveying it to the depositchamber, said means consisting of a blast generated by a fan or an equivalent device, arranged in connection with la blast-spout in such a manner that' the dust will be taken from the mortar-chamber and conveyed to the deposit-chamber and the same blast made to act continuously, so as to avoid the admission of fresh external air, and the consequent mixing of' dirt and Vother light inn` purities held in suspension in the external air with the quartz powder or dust.

The invention relates, second, to the employment or use of a valve arranged in connection with the mortarchamber and blast-spout in such a manner that by regulating or adjusting the valve the quartzmay be reduced to-a greater or less degree of tneness, as desired.

The invention rel ates, third, to an improved mode of securing the dies in the bed of the mortar, whereby said dies are firmly held in position and very readily adjusted in the mortar-bed and detached therefrom.

rlhe invention relates, fourth, to an improvement in the construction of the frame of the mortar, Ywhereby the frame is rendered exl the jars and concussions caused by the stampi ers in the prosecution of their Work.

To enable those skilled inthe art to fully understand and construct our invention, we

-will proceed to describe it.

A represents a cast-iron frame which is composed of posts a, (four more or less,) secured to a base-plate, B, as follows: The plate B is cast` with sockets b, corresponding in number to the number of posts a, and having an internal diameter greater than that of the posts, so that the latter may be iitted in the former and a space allowed all around the post between them and the sockets. These spaces are filled with melted metal c, (lead will answer.) and a key, d, is driven transversely through each socket b and post a. (See more particularly Fig. 3.)

The posts a at their upper parts are con nected by cross-bars or girts e e f, which are cast with swells g, having holes in them to admit of' the crossbars or girts being dropped down on the posts to rest upon shoulders h, spaces being allowed between the interior of rthe swells and the posts a, to admit of melted metal being poured in to secure the girts in proper position; keysalso, if necessary or desired, Imay pass through the swells g and posts a. By this mode of construction a very strong and durable v mortar-frame is obtained, one which will eifectually resist the jars and concussions produced by the operation of the stampers.

The mortar-box is composed of two horizontal parts,G D. One part, C, is cast with the baseplate B of the mortar-frame A; The other` part, D, is cast separately, and is secured on C 'by means of keys h', which pass between a stamper guide-bar, t', and uprightsj j on the part D of the mortar-box. (See Figs. 1 and 2.) The stamper guide-bar t is permanently connected to the girt f- Y A tight joint is formed between the Atwo parts U D of the mortar-box by havingthe contiguous edges of the same grooved to receive an india-rubber packing, k. (See Figs. 1, 2, and 4.) j

E represents the stampers, of cylindrical form, and at the lower ends of rods F, which pass up through. the top of the upper part of' the mortar-box and through the guide-bar i.

These stampers are raised by means of wipers of the mortar-box.

I chute.

G, placed on a horizontal rotating shaft, H, in

the upper part of the frame A, said wipers acting upon collars l on the rods F, and rotating the rods and stampers as they raise them. The stampers fall by their own gravity veach time an arm of a wiper passes the collars l. t

The stampers work over dies I, which are of circular f'orm and secured in the bottom or bed m of the mertanbox, as follows: The bed in has a groovem, made longitudinally in it, and each die I is provided at its lower end with two flanges, o o, which are at opposite points on the dies and of such a length as to admit of Vpassing into the groove a, which has dovetail recesses p made in its sides opposite each die to receive the flanges o o by turning the dies, (see Fig. 4,) in which the flanges 0;

The dies I are prevented from casuallyy turning, so that their flanges o will not pass lont of the recesses p by having the undcrl surfaces ot the dies I and the bottom of the groove n grooved to receive a rod, q, whichA passes through one side of the lower part, C,

flanges o, consequently, cannot pass out from .the recesses p. The dies therefore will be held in proper position and may be readily removed -at any time by withdrawing the rod q and turning the dies until their flanges o are out from the recesses p and within the groove m,

as shown in red in Fig. 4, when vthe dies may be lifted from their working position. Thus when the dies become worn by use or broken they may be very readily replaced by new ones. At the front side of the upper part, D, of

the mortar' box there- 'is a chute, J, through the vsame time the valve vwill readily yield or 'igive, :so as to open when quartz is thrown into the-'chute J.

; rThechute J may be nearly or quite equal in width to the length of the mortar-box, and

the valveK extends the whole length of the This valve prevents dust and dirt heldin suspension in the surrounding air from entering the mortar-box, and, as it is'self-adjusting, it requires noparticular attention on f the part of the operators or attendants.

L represents a rotary fan, which is placed in a suitable case, M, which communicates by means ofl one or more pipes, N, with the rear of the upper part, D, of the mortar-box, as

. shown in Fig. 2. The fan-case M also communicates by means of a pipe, O, with-'the lower part of a ctafnber, l?, which we term the deposit chamber.7 This chamber extends This rod eifectually pre' vents the dies I from casually turning, and the upward to any suitable height, and with its upper part a spout, Q, communicates, said spout extending forward over the tcp of the mortar-frame A, and communicating by means of al spout, It, with thc upper part of the chute J. The fan-case M has closed sides, so as not to admit the external air, and at the back of the upper part, D, of the mortar-box there is a valve, S, which is at a short distance from the orifices of the pipes N7 and is capable of being raised and lowered, so as to regulate the strength of the blast in the .mortar-box, as may be desired; By lowering the valve S the strength of the blast from the lower part of the mortar-box up into the pipes N'wil'l beincreased .and diminished by raising said valve.

The deposit-chamber l? is comparatively of large dimensions, very much larger than the mortar-box and spouts Q R, as will be seen by referring to Figs. l and 2. The fan L is driven by a belt, T, from a pulley, U, the shaft r of which is driven by a belt, V, from a pulley, NV, on the wiper-shaft H.

The operation is as follows: The wipershaft H is rotated by any'convenient power,

rand the stampers E operated by the wipers G. The quartz is fed into the mortar-box through the chute J, and is pulverized by the stam pers on the dies I. While the stampers are thus performing their work a blast is produced by the fan L through the mortar-box, fancase M, pipes N O, deposit-chamber I), and spouts Q It, as indicated by the red arrows in Fig. 1, and as the quartz becomes sufficiently pulverized in the mortar-box it is .drawn up by the blast underneath the valve S, through the pipes N, into the fan-case M, and expelled through the pipe O, into the deposit-chamber l?. This deposit-chainber P, in consequence of being so much .larger in dimensions than the pipe O and spout Q, has a'` comparatively sluggish blast4 passing through it, and therefore the quartz- -dust when forced into it will not be carried up by the current into spout Q, but will gradually settle to the bottom of said chamber, as indicated in red in Fig. 2. This is an essential feature, for without it the pulverized quartz would be circulated continuously around through the deposit-chamber, blast-spouts, and mortar-box. The valve S is also an essential feature of the invention, as by regulating it as described the strength of the blast from the lower part of the mortarbox into the pipes N N may be increased or diminished, and consequently the quartz pulverized to a greater or less degree of tineness, as desired. If the blast is strong, it will of course draw up coarser or heavier particles of quartz into the pipes N than if it were weak. A weak blast allows said particles to remain in the mortar-box until f'urther reduced or Vcomminuted so that they can be raised by it.

veyed into the depositchamber P without the liability of having any dirt or other foreign impurities mixed with it, as the blast rent through the mortar-box, pipes, fancase,

deposit-chamber, and spouts, as described. The pulverized quartz is also prevented from being blown out from the machine and around the apartment, and much waste prevented. and the workmen are not compelled (as in the old mode of dry crushing) to inhale the pulverized ores, which soon produces fatal disease in the lungs.

` Having thus described our invention, what we claim as new, and desireto secure by Letters Patent, is-

1. The combination ot' the fan L M, pipes N O, 'chamber l?, spouts Q R, and mortarbox C D, all constructed and arranged to voperate in the manner and for the purposes specitied.

2. The valve S, arranged in relation to the mortar-box and pipes N, substantially as shown, to regulate the strength of the blast in the mortar-box, and consequently the degree of iineness or comminution of the quartz as set forth.

3. The securing of the dies I in the bed m of the lower part O of the mortar-box by means ot' the anges o o at the lower parts of the dies, the recesses p p at the sides of the groove n, and the wire q, fitting in a groove in the bottoms of the dies and the bed m,

.substantially as described.

4. The combination of the posts a. a, socketed girts e g, shoulders h l1., bed-plate B, sockets b b, soft metalc, and keys d d, all constructed and arranged, as herein described, to constitute an improved frame for stamping mills. Y

ZENAS WHEELER. C. K. HOTALING.

Wi tn esses to si gnatureof Zenas Wheeler :4

J F. GREENMAN, R. H. SWITON.

Witnesses to signature of (l. K. Hotaling:

J. F. GREENMAN, R. H. Swi'roN.

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