US608422A - Steam ore-stamp - Google Patents

Description

No. 608,422. Patented Aug. 2, I898.

n. sous.

STEAM ORE STAMP.

(Application filed Kay 8, 1897.)

(No Model.)

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UNITED STATES PAT NT rrrcn.

THE GATES IRON STEAM ORE-STAM P.

SPECIFICATIONforming part of Letters Patent No. 608,422, dated August 2, 1898.

7 Application filed May 3, 1897. Serial No. 634,873. (N0 dem To all whom it may concern.-

Be it known that I, DAVID COLE, a citizen of the United States, residing'at Chicago, in

the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam Ore-Stamps, of which the following is a specification. I

The object of my invention is to provide a simple, economical, and efficient ore-stamp; and the invention consists in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure l is a longitudinal sectional elevation of the upper portion of a steam ore-stamp constructed in accordance with my improvements, preferably showing the ports and passages for the admission of fluid-pressure in diagrammatic form; and Fig. 2, a modified'form of my, improvement', showing the same as applied to a single cylinder and stamp-piston. 7

My invention relates particularly to that class of steam ore-stamps in which a battery,

consisting of two cylinders and stamp-pistons, is arranged to be controlled by the operation of a single valve. In this particular it is usual to use the controlling-valve to admit and exhaust the fluid-pressure; and my invention has for its principal object the providing of a controlling-valve to govern the admission of the fluid pressure only while the stamp piston or pistons in their operation control the exhaust directly without the intervention of other means.

Other objects of the invention will appear from the following description and an eXaInination of the drawings.

In illustrating and describing my improvements I will only illustrate and describe those parts which I consider to be new, taken in connection with so much that is old as will enable those skilled in the art to understand the same and practice the invention, leaving out of consideration other and well-known mechanisms which if described here would only tend to confusion and ambiguity.

In describing a steam stamp-mill constructed in accordance with my improvements I will first describe one form to which my improvements are applicable-viz. a mill comprising a battery of two cylinders having movable stamp-pistons therein, as shownpartieularly in Fig. 1. In this form a casing A is provided having two cylindrical pressure-chambers a a, in which stamp-pistons B and B are reciprocatingly mounted, such stamp-pistons being provided with the usual stems Z) Z), to the bottom of which the shoes and other parts are attached. To admit fluid-pressure above and below such stamp-pistons directly and expansively, I provide a single controllingvalve (1, having a piston-rod C for moving the same, all of which are mounted in a valvechest 0 This valve piston-rod is preferably provided with two pistons c and 0, between which the live steam at high pressure is ad-' mitted, so that such piston-rod is practically balanced. Each of the valve-pistons is provided with small longitudinal openings or passages c and 0 adapted to admit a limited supply of fluid-pressure behind such pistons or between them and the valve-chest casing in opposition to each other, so as to actuate said rod, as more fully hereinafter described.

To admit fluid -pressure from the valvechest tothe'cylinder, a passage D is provided, which leadsto the pressure-chamber a below the stamp-piston, and a second passage d, that leads from the valve-chestto the cylindrical pressure-chamber a above such piston. A passage E leads from the cylinder-chamber cto the valve-chamber in a position to be covered and. uncovered by the movements of the valve-piston'c','wl1ile the exhaust-passage G connects directly with both of the cylinderchambers and is arranged to be covered and uncovered by the movements of both pistons, as will be more fully hereinafter described. A second passage D connects the valve-chest with the cylinder-chamber a at a point below the stamp-piston located therein, while a piston d connects such chamber with the valvechamber at a point above the stamp-piston. A passage E also connects the cylindrical chamber a with the valve-chest and is arranged to be covered and uncovered by the movements of the valve-piston c, as will be hereinafter more fully described.

The operation of the parts is as follows: The valve-piston is arranged to be moved by a hand lever H first to one side and then to the other. When the valve-piston is moved.

to the position shown in the drawings, high fluid-pressure flows from the valve-chest through the passage D below the stamp-piston 13 and raises the same, as shown in Fig. 1. The exhaust is covered, as is also the passage E, that leads to the valve-piston chamber. Pressure iiowing through the small inlets c and c and acting positively between the piston c and the walls of the valve-ehamber, such piston and valve are moved to the opposite position from that shown in the figure, so as to connect the cylinder-passages D and (Z. l luid-pressure then flows through such passages from below the piston l to above the same, where, acting expansively on the stamp-piston over the large and superflcial area, it forces the same downwardly, being assisted by the weight of the parts. \Vhile this action is taking place, the passage I) is uncovered, so that high pressure flows below the stamp-piston l3 and acts to raise the same to its upper limit of motion, covering the cxhaustport and the passage E. When this passage is covered and the stamp-piston l is at its lowest limitof motion, it will be seen that the pressure between the valve-piston c and the walls of the casing is allowed to expand or become less than between the walls of the casing and the valve-piston c to unbalance the rod and cause such pistons, with the slide-valve, to move back into the position shown in Fig. 1. At each reciprocation of the stamp-piston fluid-pressure is exhausted into the open air through the exhaustrpassage G.

Describing the modification shown in Fig. 2, a cylimiler-casing I is provided in which a single stamp piston K is reciprocatingly mounted. To admit high pressure below this piston and expansively above, a controllingvalve L is mounted in a suitable valve-chest Z. This valve is provided with a piston-valve rod L, having pistons Z and Z of different superficial areas, while a rod 1 projects through the outer portion of the valve-casing and is provided with a eoil-spring l to assist in the operations and form a cushion for the same. The cylinder casing is provided with a passage M, that connects the chamber with the valvechest below the stamp-piston, and with a second passage N, that connects the valve-chest with a point above the stamp-piston, both of which are arranged to be connected and disconnected by the movements of the slide or controlling valve. The valve-casing is provided with an escape-passage I, that leads from a point between the valve-piston head I and the val ve-easing to the outer air, though it maybe connected with the exhaust-passage. A d not or passage 711/ connects the space between the .'alve-piston head I with. the passage 3i for the purposeshereinaftcrdcseribed.

In operation, the parts being in the position shown in Fig. 2, high pressure is admitted from the valve-chest through the passage M to a point below the sta1np-piston, causing such piston to rise and close an exhaust-1mm;

i and compressing the low pressure of steam above such ports, so as to act as a cushion and overbalance the direct pressure until the lower part of the piston passes above the opening of the passage t" to admit pressure above the piston-head expansively. The prcssu re above the piston-head being compressed to a point that equals or overbalances the direct pressure a portion of it is forced through the pas sagcM and the by-pass m to the space between the valve-piston head Z and the valve-casing, overcoming the direct pressure in the valvechest on the larger superficial area of such piston and forcing the piston to the other limit of its motion, thereby causing the controlling-valve to move and connect the passages M and M. \Vhen such passages are connected, the high pressure below the stamppiston flows to a point above the same and, acting expansively on the larger superficial. area of the upper portion of the stamp-piston, forces it down to the position shown in the figure. \Vhen such stamp-piston has reached its lower limit of motion, the exhaust-openings are uncovered and the pressure above and below the piston perm itted to exhaust into the open air. At the same time the pressure which has been compressed between the valve-piston head Z and the valve-casing is allowed to exhaust, and the direct pressure in the valve-chest, acting on the larger superficial area of such piston, causes it to move again to the position shown in the figure, thereby admitting pressure directly beneath the stamp-piston.

The adjustable collar or nut L on the valve rod or stem, taken in connection with the helical coiled spring Z, acts as a cushion and as tension mechanism to properly balance the action of the valve or regulate the same. A pipe 0 is used to connect the valve-chest with some suitable source of pressure-supply. It will be understood that the passage t" is a bypass and is not necessary to the complete operation of the mechanism, but may be dispensed with or used to suit different circum stances or conditions.

\Vhile I have described my invention in two forms in which it may be embodied, and minutely as regards details, I do not desire to be limited thereto unduly any more than is pointed out in the claims. On the contrary, I contemplate all proper changes in form, c011- struction, and. arrangement, the omission of parts and substitution of equivalents as circumstanccs may suggest or necessity ren er expedient.

I claim 1. In a steam ()I'G'Siiiiilj), the combination of a cylinder provided with a reciprocating stamp-piston, the cylinder having passages leading to points above and below the stamp piston, a controllingwalve arranged to connect and disconnect the above-named ports and, passages in the cylinder so as to admit high pressure below he stamp-piston and low pressure above the same, and a port or IIO passage in the cylinder communicating with the upper portion of the cylindrical chamber which forms the low-pressure chamber and so arranged as to be covered by the piston during the larger portion of its upward stroke and uncovered as the piston nears the lower limit of its stroke to exhaust the pressure at low pressure, substantially as described.

2. In a steam ore-stamp, the combination of a cylinder provided with a reciprocating stamp-piston and inlet and outlet passages, the outlet of fluid being controlled by the movements of the reciprocating piston, and a controlling-valve arranged to cover and uncover the passages so that high fluid-pressure is admitted below the stamp-piston and low pressure above the stamp-piston to recipro cate the same, a valve-rod provided with piston mechanism for moving the controllingvalve, the cylinder being provided with passages leading from the cylinder-chamber to such piston mechanism and adapted to be covered and uncovered by such piston mechanism, so that the'movements of the stamppiston causes the overbalanoing of the valvepiston mechanism and shifts the valve from one position to the other, substantially as described.

3. In a steam ore-stamp, the combination of a casing having at least two cylindrical chambers, a stamp-piston in each of such chambers, a Valve-chest'having passages connecting with each cylinder above and below the stamp-pistons, a controlling-valve adapted to cover and uncover connect and disconnect such passages so as to admit high pressure below the stamp-pistons and expansively above the same to reciprocate the parts, the cylinder-casing having an exhaust-passage that connects each of the cylinder-chambers with the outer air, the exhaust of fluid through the same being controlled by the movements of the reciprocating pistons, a valve pistonrod provided with two pistonsone located 2 DAVID COLE. Witnesses:

PHILETUS W. GATES, W. R. TALBOT.

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