US205573A - Improvement in guides for the stems of stamp-mills - Google Patents

Description

2 Sheets-Sheet 1,

F. P. PIOKINGQ de r the Stem of Stamp-Mill.

5R3. Pate nted July 2,1878.

FIE E7 Ynyenfor 2 Sheets-Sheet 2.

F P. PIOKING. Guide for the Stem of Stamp-Mill.

Patented July 2, 1878.

Inventor 9??? -%V%%y Witne s s e 8- aa %Z/ @w NPTERS. PHO HER. WASHINGTON D O UNITED STATES PATENT OEEIoE.

FRANKLIN P. PIGKING, OF PIOOHE, NEVADA.

IMPROVEMENT IN GUIDES FOR THE STEMS OF STAMP-MILLS.

Specification forming part of Letters Patent No. 205,573, dated July 2, 1878; application filed April 22, 1878.

To all whom it may concern.-

Be it known that I, F. P. PIOKING, of Pioche, county of Lincoln, State of Nevada, have in vented an Improved Guide for Quartz-Mill Stamp-Stems; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanyin g drawings.

My invention relates to improvements in girt-timbers or guide-frames of quartz-mills, which keep the stems carrying the stamps in position, allowing them a vertical but no latral motion.

It consists in forming a metal back plate which bolts to the girt-timber, in or on which are formed dovetail mortises, and a metal box, formed square and tapering, having on one edge a dovetail tenon to fit in the mortises in the back plate. In this metal box is a wooden lining or bushing, made also tapering, which is formed in two longitudinal halves, each half having a semicircular groove cut lengthwise down its inner face, so that when they are in position in the tapering box the two grooves in the halves form a circular hole, through which the stamp-stem plays.

Figure l is a perspective view of a stampmill. Figs. 2, 3, 4, and 5 are enlarged views of my invention.

Let A represent the frame of a quartz-mill, in which B are the girt-timbers or guideframes, serving as guides for the stamp-stems O, keeping them in avertical position over the battery D, and admitting of avertical motion to the stamps.

To the girt-timbers B is fastened, by means of a flange, E, and the necessary bolts, a metal back plate, F, having dovetailed mortises G, formed either by projecting lugs or by sinking in the body of the plate. lthen construct a metal box or holder, H, having formed on one edge a tenon to fit the dovetail mortises in the back plate, so that the box stands vertically when in position for use. This box or holder H is made square, with the opening cut tapering; or it may be made in any desirable form, the recess being cut tapering for the purpose below described.

In the tapering hole in the box H, which I preferably make square, is fitted a hard-wood bushing or lining, I, made in two pieces for its easier insertion, withdrawal, and convenience of manufacture. In this bushing or lining I to the box H the stamp-stem 0 moves vertically through the cylindrical hole J formed in the bushing.

The tapering form of the interior of the box H prevents the bushing or lining I, which, as stated, is also made tapering, from sliding down farther than its shape admits, and holds it firmly in place.

Through the side of the box H is a slot, in which is fitted a key, K, which passes through the box, and a notch, L, cut in the two pieces of wood forming the inside lining or bushing I. This key then serves to keep the lining or bushing from sliding upward out of its seat in the bushing by the upward motion of the stamp-stem.

The two pieces forming the lining I are made of hard wood, cut so that the grain is' vertical. A lining made in this manner is easily and quickly removed by taking out the key K, and a slight tap from below will loosen the bushing.

When the hole J becomes enlarged by the continued friction of the stamp-stem, the bushing may be taken out, and by removing a little wood from each inner side of the halves forming the bushing, and inclosin g the stampstem by dropping one-half on each side into its seat in the box H, the wear is taken up.

I thus provide a simple, cheap, and effective appliance through which the stems of a stampbattery may play. There are no bolts or fastenings to be removed, and the bushing may be removed and replaced in a moment without the aid of any tools.

In case of anecessity for removing the stampstem, the box holding the bushing may be taken from its dovetailed seat by sliding it up the ste1n,\vhere it may remain or it may be slid off altogether.

The back plate and box may be made of steel, so as to be light and strong. The hardwood bushing will last a long time, and may easily be removed and replaced when considered necessary.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The plate F, with its flange E and the dovetailed mortises G, in combination with In witness whereof I hereunto set my hand the holder or box H, substantially as shown, and seal. and for the purpose herein described. FRANKLIN PIE RCE PICKING 2. The metal box or holder H, made tapering, in combination with the tapering wooden Witnesses: bushing I and the locking-key K, substantially A. A. YOUNG, as shown and for the purposeherein described. E. D. TURNER.

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