(No Model.) A. L., DE. STEAM. ENGINE CROSS HEAD, No. 32,727, Patented July 7, 1885. Fig. 2. gy. 1

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UNITED STATES PATENT OFFICE.

ALBERT L. IDE, OF SPRING FIELD, ILLINOIS. STEAM-ENGINE CROSS-HEAD.

SPECIFICATION forming part of Letters Patent No. 321,727, dated July 7, 1835. Application filed May 18, 1885. (No model.) To all whom it may concern: bearing-surfaces fitted to work in correspond Be it known that I, ALBERT L. IIDE, of ingly-shaped upper and lower guides, HH', Springfield, in the county of Sangamon and which are formed upon the engine-frame K. 55 State of Illinois, have invented certain new The box A", which constitutes the body of the and useful Improvements in Steam-Engine cross-head, is formed with an open end, a, Cross-Heads; and I do hereby declare that the through which the end portion of connecting following is a full, clear, and exact description rod B passes, and an opposite partially thereof, reference being had to the accompany closed end, a, provided with a central hub, a', ing drawings, and to the letters of reference to which the piston-rod C is secured, and IO marked thereon, which form a part of this which is preferably apertured to receive the Specification. threaded end of the Said rod. The object of this invention is to provide an The connecting-rod is preferably made with improved construction in steam-engine cross a solid or forged end, or one which is mor heads; and it consists in the matters herein tised through from side to side, to provide a 15 after described, and pointed out in the ap seat for the usual brasses, B, which are fitted pended claim. in the mortise of the rod and held in place by The main feature of novelty in my inven a wedge or other suitable means. tion is embodied in a construction in means D is the wrist-pin, which is made separate for attaching to the cross-head the wrist-pin from and detachably secured in the opposite by which the connecting-rod is pivoted to the sides or walls of the hollow or box cross-head, cross-head, whereby the said wrist-pin may be thus permitting it to be passed through the mor readily detached from the cross-head and the tised end of the connecting-rod after the latter employment permitted of a “solid-end’ con has been inserted into the cross-head. By this 75 necting-rod or one having a mortise to receive construction the obvious advantage is ob 25 the brasses, instead of the usual strap at its tained that a connecting-rod made solid, or end engaged with the Wrist-pin. forged at both ends to form mortises to receive The invention may be more fully understood the brasses, may be employed in place of a by reference to the accompanying drawings, connecting-rod in which the brasses are held in Which Figure I represents a longitudinal by a strap at its end adjacent to the cross Section taken on a vertical plane through the head, such as has heretofore usually been em cross-head and guidestherefor, with a portion of ployed. the connecting-rod also shown in section. Fig. As a preferred means of attaching the Wrist 2 is a transverse vertical section taken through pin in the cross-head, the walls of the aper the guides upon the line aca, the cross-head tures or seats provided in the sides of the box being shown in elevation. Fig. 3 is a top A for the wrist-pin are beveled, so as to give plan view of the cross-head; and Fig. 4 is a an inward taper to each aperture, as clearly transverse section taken on line y y of Fig. 1, shown at a, Fig. 4, and the Wrist-pin is formed showing the Wrist-pin in elevation, with the with a conical part, d, at one end, which is exception of one end thereof, which is shown in fitted to one of the inwardly-tapering ap section. Fig. 5 is a detail showing a tapering ertures in the box A, and is reduced in diam bushing for supporting one end of the wrist. eter at its end opposite the tapered part d, so pin, said bushing being viewed from its larger as to form a cylindric stem, d, around which end. is placed a bushing, E, which is fitted to the The cross-head A consists in its principal stem and externally beveled to conform to the 45 part of an oblong rectangular metal box, A', tapered aperture in the cross-head wall. the upper bearing-surface of said cross-head The walls of the box are, as herein shown, being formed by a plate, a, rigidly bolted to thickened or re-enforced by inner and outer the top of the box A, and its lower bearing flanges in order to form relatively broad annu surface being similarly formed by a plate, a?, lar bearing-surfaces for the end of the wrist-pin which is likewise securely bolted to the under and the bushing. The Wrist-pinisheld in place side of Said box. The plates a and a? are each, by means of a nut, F, which is provided with as herein shown, formed with part cylindric a short screw-stem entering a threaded socket 2 321,727 in the smaller cnd of the wrist-pin. The said equally over the lower bearing-surface of the nut is arranged to bear against the bushing E, cross-head, and has, therefore, no tendency to so as to at once wedge the tapered end of the tip the cross-head in the guides, or to cause pin into its aperture at one side of the box, the said lower bearing-surface of the croSS and simultaneously therewith to force the split head to press more forcibly upon the guide at bushing into the tapering hole at the opposite its end beneath the wrist-pin than at its op side of the said box. A washer, G, which is posite end, as is liable to be the case when the preferably interposed between the head of the usual construction in the parts is used. nut and end of the wrist-pin, serves as a back IBy the location of the wrist-pin as described, O ing for the bushing, and the latter, as shown also, both ends of the bearing-surfaces of the 45 in Fig. 5, is preferably split, as indicated at cross-head are in the same manner caused to c, Fig. 5, so that when forced into the tapered press equally upon the guides, under the up aperture in the box-wall it will close upon the ward or downward thrust of the cross-head stem d' of the wrist-pin, and thereby rigidly against the guides due to the angular position clamp, and at the same time accurately center, of the connecting - rod at the middle of the 5) the end of the latter in the said aperture. stroke of the piston. The construction of the parts described ob I claim as my invention viously affords a rigid and secure means of The combination, with the cross-head guides holding the wrist-pin in both sides of the cross and connecting-rod of an engine, of a hollow head box, and also permits the Wrist-pin to be cross head provided with opposite tapered ap 55 easily taken out and replaced in disconnecting ertures in its side walls, a wrist-pin provided and connecting the parts of the engine. with a tapered portion, d, at one end adapted Aside from the improved result obtained to fit one of the said apertures, a split tapered by the use of the “box or hollow cross-head, bushing, E, fitting the opposite end of the 25 as affording a convenient and secure means of wrist-pin and the aperture adjacent thereto, removably attaching the wrist - pin of the and a nut for clamping the parts mentioned cross-head in the manner set forth, an advan in place, substantially as described. tage is obtained by locating the axis of the piv. In testimony that I claim the foregoing as otal joint between the slide and the connect my invention I affix my signature in presence ing-rod at the middle of the cross-head, or at of two witness.cs. a point midway of the length of the bearing surfaces of said cross-head, for the reason that ALBERT I. II) E. by this construction the pressure caused by Witnesses: the weight of the end of the connecting rod J. F. BUNN, 35 and parts connected therewith is distributed YATES.