US257540A - Daniel - Google Patents

Description

(No Model.) v 2 Sheets:.'S heet 1. D. G. WILGUS & G. H. BEEBE.

GROSS HEAD FOR STEAM ENGINES.

Patented May 9 1882.

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ETERS, PhotwLiXhcgmphcr. Washinglon, D. c.

(No Model.) 2 Sheets-Sheet 2. D. U. WILGUS &G. H. BEEBE.

GROSS HEAD FOR STEAM ENGINES.

Patented May 9, 1882..

lI Ztn 64:18.1

llwrrso STATES DANIEL O. \VILGUS AND GEORGE H.

BEEBE, or MAnsHALLTowN, IOWA,

ASSIGNORS TO SAID BEEBE.

CROSS-HEAD FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 257,540, dated May 9, 1882.

Application filed August 31, 1881.

To all whom it may concern:

Be it known that we, DANIEL O. TILGUS and GEORGE E. BEEBE, both of Marshalltown, Marshall county, in the State of Iowa, have invented certain new and useful Improvements relating to Gross-Heads for Steam-Engines and Analogous Machinery, of which the following is a specification.

Thelateral pressure of the cross-head against the slides is in the same direction whether in the outward or in the return stroke. The wearing away of the metal tends to bring the piston-rod out of line on the side toward which the force tends. We have devised means for remedying this evil and efficiently guiding the piston-rod by a single slide, which the crosshead receives inan open side or face.

Our construction affords a broad surface to receive the friction in the direction of the greatestforce,withasufiicientsurface toreceive the friction in the opposite direction due to reversing, &c. It makes it easy to adjust the tightness of the fit by always setting up on the side which is subjected to the wear. What we esteem the most important feature of the whole is the open character of the framing on the side opposite to our guide. The framing has sufficient metal distributed so as to get the best effect, but with only one slide, which is taken hold of by the cross-head so as to efficiently guide the latter. This leaves an open space on the opposite side of the framing, which greatly facilitates examining and adjusting the cross head, and packing and adjusting the packing of the stufiing-box. r

The accompanying drawings form a part of this specification, and represent what we consider the best means of carrying out the invention.

Figure 1 is a side elevation, and Fig. 2 a plan view, partly in section. The above represent the cross-head and the parts immediately in contact therewith. Fig. 3 is a general view of the entire engine.

The drawings represent the novel parts with so much of the ordinary parts as is necessary to indicate their relations thereto.

Similar letters of reference indicate like parts in all the figures.

A is a portion of the fixed upright framing of the engine, and B is a T-piece castin one (No model.)

therewith or bolted rigidly thereto, and truly planed or otherwise finished to serve as a slide. The outer face of the slide B is beveled in both directions from the center line, as indicated in Fig. 2. The cylinder is connected to the bed by a series of frame-pieces, A, d stributed as shown, so as to constitute a rigid frame with a moderate weight of metal. The frame-piece A, carrying the slide B, is bolted on cross-pieces'A fixed on two of the uprights A. Opposite to this the framing is open and allows free access for packing or adjusting the stuffing-box.

O is a tapering brass finished. on one face to match the double-beveled face of the slide B. It is provided at its largest end with a rigid arm, 0, which receives the neck of an adj ustin g-screw, D, which latter is tapped into the cross-head.

The entire cross-head will be referred to when necessary by the single letter M, certain portions being designated by additional marks, as M, M &C. One portion, M, is knuckled by a transverse pin, m, to a connecting-rod, (not represented,) which may be of any ordinary or suitable construction, and adapted to perform its usual functions by connecting with a crank on a shaft. (Not represented) Another portion, M is socketed, and receives a piston-rod, m which extends through a stutting-box (not represented) into a cylinder, and connects with the piston from which motion 1s received by the action of the steam, controlled in any ordinary or suitable manner. The piston-rod is strongly and stiffly connected to the cross-head by a key, m The side of the crosshead adjacent to the slide B is formed with a recess having a greater depth at the upper than at the lower end, the taper corresponding exactly to the taper of the brass O. The sides of this recess are formed by parallel jaws M M, truly finished on their interior surfaces to match the brass 0. Two pinchingscrews, P P, are tapped through one ofthe jaws, and arranged to pinch firmly against the brass and hold it in the position in which it is adjusted longitudinally by the screw D. Each jaw M M is formed with a stout internal lip, M finished to match against the back face of the slide B.

The hole which recei vcs the screw D is drilled care to finish the back face of the slide B and the adjacent inner faces of the lips so that when the brass O is driven tight the centers of M and M coincide with the prolonged axis of the cylinder. (Not represented.) By means of our tapering brass O and the means for ad justing and confining it we can always take up all the slack and provide a fair bearin g of the cross-head through the intervention of the brass 0 against the broad beveled face of the slide B. Whenever the wear requires it we slacken the pinching-screws I and, giving a partial turn to the adjusting-screw D, again tighten the pinching-screws I, and the adjustment is completed. The wear is all borne by the brass. It is always uniform on all parts of the face presented to the slide, is peculiarly easy of adjustment, and the parts may be constructed cheaply and easily kept in order.

Modifications may be made in the form and proportions of the details. The pin m for the connecting-rod may be smaller and differently confined. One pinchingscrew P may serve, or three may be employed. We can employ pinching-screws on each side of the crosshead, if desired. The arm 0, by which the screw D controls the position of the brass,may be cast or otherwise formed in one with the brass or rigidly screwed on as may be preferred. The head and collar may be forged or otherwise formed in one with the screw D, and the necl; of the screw between may be received in a slot' in the arm 0. Various other modifications of the details may be allowed without departing from the principle of the invention.

The rigid frames A may be curved either in vertical or horizontal section, or both.

We can produce the slide as rigidly and permanently connected to the main framing A. Such arrangement is preferable as avoiding maladjustments. It is essential to hold the slide rigidly and guide the cross-head truly by the single slide, while the opposite side of the framing A is open and unobstructed.

We claim as our invention- The combination of the slide B, projecting on either side of the framing, to which it is attached, and provided with a raised center on its outer surface, with the cross-head M, having the jaws M M M, and the wedge O, fitting over the outer face of the slide and provided with the adjusting means D P, substantially as set forth.

In testimony whereof we have hereunto set our hands at Marshalltown, Marshall county, Iowa, this 26th day of August, 1881, in the presence of two subscribing witnesses.

1). o. WILGUS. eno. H. BEEBE.

Witnesses:

Gno. S. HIcKoX, A. D. EHLE.

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