US707259A - Stamp-tappet. - Google Patents

Description

PatentedAug. 59,19132, C. C. EUEGER STAMP TAPPET.

' (Application UNITED STATE- P- TENT OFFicE.

CHARLES C. RUEGER, O-F'; BUTTE, MONTANA.

STAMEP-TAPCPLET.

SPECIFICATION formir ig part of LettersPatent No. 707,259, dated August 19, 1 902. Applioatihn filed l lune $19101. Serial meazto. (No model.)

To all whom it may concern:

Be it known that I, CHARLES 0. RUEGER, a

citizen of the United States, residing'at'Butte,

county of Silverbow, State ofMontana, have invented an Improvement in Stamp-Tappets;

and I hereby declare the followingito .bea full, clear, and exact description of the same.

My invention relates to an'improvementin tappets such as are secured' to thestems of ore-crushing stamps in suchposition asto be engaged by cams upon a cam shaft, which serve to alternately raise the stamps and re lease them, so that they may; drop 'and crush the ore within the mortar oftthe'battery.

My invention consists in an.v improved means for securing the tappet upon the stem and in details of construction which will be more fully explained by referen'cdto the accompanying drawings, in Which- Figure 1 is a vertical section of my inven-- tion, taken on the line x 00 ofFigxZ. Fig. 2' is a horizontal section on the line y y of Fig. 1. Figs. 3 and are horizontal sections illus-' trating modifiedbores of the tappet. Fig. 5 is a horizontal sectionof the tappet similar to Fig. 2 and showing the stem, the gib, and the key in dottedlines. V

In stamp-tappets as ordinarily used great strain must be put upon the gib andkeys in order to hold the tappet so firmlyto the storm that it will not slip when the stamp is in operation, and thisstrain tendsi to rupture the key-seat besides damaging thegibs and keys on account of the hard driving which is necessary to hold the parts firmly in place. In consequence of this thegrip' of thegibupon the stem only extends to'a short distance beyond the bearing area of the key upon; its back, and by reason of the loose .fit of the tappet upon the stem there is buta verysmall bearing-surface between the outside ofthe, stem and the inside of the tappet-bore at the point opposite the key-seat.

It is the object of-my invention to provide an improved means for securing the tappets' to the stems, to increase the bearing-surface between the stem and tappet, and to increase the power of the gib and key whendriven in opposition to this surface.

In my invention, A is a stamp-stem, and B the tappet. Instead of using one gib and two or three keys I employ independent gibs with the keys:

2, one .foreach key 3, and the key is made of such size that it' bears upon the entire back of the gib.- The gib is a block of ample size made'oftough cast-ironor of cast-steel, re-

seat in the keyway. The key being about dou-- ble .the, usualsize is very stiff and offers a corresponding resistance to deformation. Ordinarily the tappet has a uniform cylindrical bore, and'thisj fits loosely upon the stampstem untilthe'keys are driven. The result is that when the tappet is keyed on the holdingsurfaces are only that part of the gib which may be in contact with the stem and a narrow strip of the bore of 'the'tappet upon the opposite side of the stem ,and in orderto prevent the -tappet from shifting the keys must bedriven veryhard with corresponding'detriment to the parts. In my tappet the bore'is in the form of segments of cylinders of different ra- The radius of the part 4 is slightly less than the radius of the stamp-stem, this part being upon the opposite side from the keydius.

seats,where the radius of the part 5, which corresponds with the side on which the keyseats are, is correspondingly of larger diameter than that of the stamp-stem. The side opposite the gib is bored out to a very tight -fiton the stem, so that the stem will fully seat in the tappet only when driven home The stem then has a bearing at least tentimes as great as in the old style of bore, the tappet clamping it closely around a considerable portion of the circumference, and it is held very tightly in place. In consequence of this a very moderate driving of the keys will hold the tappet very securely. The space on the gib side being so much larger is entirely free when the keys are withdrawn, and the space between the stem and the tappet is so large on this side that dust and dirt will not lodge and pack therein, as

it will easily drop out at the bottom. Consequently when the keys are withdrawn a few blows with a heavy hammer upon the key side of the tappet will force it away from its hold upon the stem, and the larger space into which the stem is thus forced allows the tappet to be moved easily to any desired point for reseating.

In the modification shown in Fig. 3a recess 5' is cast in the seat & directly opposite the gibs, and this insures a perfect, although somewhat reduced, bearing for the stem, which is of advantage if it should have a loose fit.

In Fig. 4 the clearance is provided by two equal parallel bores intersecting each other and with the ridges at the junctions cut out, or that part of the bore contiguous to the gibs may be made of larger radius than the part opposite to them butintersecting the opposite side of the bore in which the stamp-stem fits and is normally locked by the gibs and key.

In either construction the removal of the gibs and key permits the stem to be disengaged from its seat.

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

1. A stamp-stem tappet adapted to receive independent and separated gibs and keys upon one side, and having the bore opposite the gibs of less, and the bore upon the side adjacent to the keys of greater diameter than that of the stamp-stem upon which the tappet is fitted.

2. A stamp-tappet having a bore longitudinally through it approximately half of said bore being of such radius as to fit tightly about the stem, and the other and opposite portion of the bore having a larger diameter to form a clearance between itself and the stem, keyways passing through the tappet at two or more points removed from each other upon the side contiguous to the larger bore, and gibs and keys by which the smaller part of the bore is caused to seat about the stampstem.

3. A stamp-tappet having a longitudinal bore of two diiferent radii, the smaller of which is adapted to seat tightly around the stamp stem, openings made transversely through the tappet upon the opposite side, gibs fitting said openings, and occupying portions only of the clearance-space formed by the larger bore,and seating against the stampstem, and independent keys for each gib adapted to lock them in position.

4. A stamp-tappet having a longitudinal bore, one portion of which is of smaller radius than that of the stamp-stem, and the opposite portion of larger radius, independent gibs and chambers removed from each other and into which they fit in the portion opposite the smaller portion of the bore, keys bearing on approximately the entire back surface of the gibs, and keyways through which they are driven to force the gibs against the stem and seat the latter in the opposing smaller bore of the tappet.

In witness whereof I have hereunto set my hand.

CHARLES C. RUEGER.

Witnesses:

J. A. RUEGER, ALFRED HAHN.

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