US316187A - Valve-gear for steam-engines - Google Patents

Description

' 2 Sheets-Sheet 1. R. SOHEIDLER.

VALVE GEAR EUR STEAM ENGINES.

(No Model.)

Patented Apr. 21, 1885.

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Invent or.

2 Sheets-Sheet 2.

(No Model.)

R. SGHEIDLBR.

VALVE GEAR EOE STEAM ENGINES.

Patented Apr. 21, 1885.

Inventor. @LIZ/ard fo/zezdii:

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Nrrn STATES' vREINHARD SCHEIDLER, OF NEWARK, OHIO.'v

VALVE-GEAR Fou STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 316,187, dated April 21, 1885. Application fue-fi June V11, 1884. (No model.)

To all whom it may concern: l Be it known that I, REINHARD SGHEIDLER,

a citizen of the United States, residing at Newark, in the county of Licking and State of Ohio, have invented certain new and useful Improvements in Valve-Gear for Steam-Engines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable. others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon,which form a part of this specification.

My invention relates to improvements in steam-engines.

My invention relates to valve-gear for steamengines; and it consists in certain improvements in the same, as described in the specification, and more particularly set forth in the claims.

A guide-bar for the valve is operated in a pair of guide-boxes, which latter are cast in a single piece with an oil-boat and bolted to one of the slides. A curved bracket bolted to the middle of the guide-bar, having the valve-.rod and connecting-rod attached to itsupper and lower ends, respectively, allows a more complete parallel as well as line movement, caus- A ing less wear ofthe operative parts, and adapting the engine for a greater amount of work with less cost for repairs than in the ordinary construction.

rlhe object of the invention is to dispense with parts which are liable from wear to get tical plane and in the direct line of the stroke.

Figure l is a side elevation of a steam-engine havin g my improvements embodied therein. Fig. 2 is a top view of the same with the cover ofthe steam-chest removed. Fig. 3 is a view of the guide-bar and its connections. Fig. 4 is a vertical longitudinal section of the same with the bracket and valve-rod removed. Fig. 5 is an end view of the guide-bar with the bracket bolted thereto.

A is the steam-chest,which is shown in vertical longitudinal section in Fig. 1. In this engine it is placed on the top of the cylinder B. An ordinary slide-valve, C, is used.

The outer end of the .valve-rod b extends through a guide, b, on the outer end of the steam-chest, whichresembles in its outward appearancethatin common usein locomotives; but, unlike those, it has no stuffing-box. A hole of sufficient size t'or the valve-rod is bored through the piece b (which is' cast solid) from the front end of the steam-chest, and is counterbored from the outside by a tool about double the size. The outer end of this larger hole is threaded and a steam-tight cap, b2, screwed therein, and the space inside the latter babbitted. Two bearings are thus given to the valve-rod, and at the same time dispenses with a stufling-box at this end of the lat-ter.

On the outside top slide, z', and covering the entire upper surface ofthe same, is a flat plate, c2, which is cast in a single piece with the upright square guide-boxes c thereon, and an oil-boat, o, between them. This plate has holes in its ends, and the bolts 7c, which secure the upperand lower slidebars, t' and i', together, extend through this plate also, securing it to the slide-bar t'.

A square guide-bar, d, extends through the boxes c and operates therein, on which is bolted a bracket, C', bent to conform to the shape of bar d in the middle part, and curved at the top end to bring the latter in line with the valve-rod,which extends through it and is adjustably secured thereto by nuts n n on either side. lThe bracket C is wide in the middle part, and is secured to the bar d by the horizontal bolts d d (Seen in Figs. l and 8.) Its lower end extends downward over the side of the slide i', and has a hole, g, therein for the wrist-pin c of the connecting-rod D.

The bracket C', being supported over the angle d2 of the bar d upon the top and side ol the latter, forms a very firm and strong connection between the valve-rod b and the connecting-rod D, andas the guide-bearings c of the bar d are cast in one piece with the plate c2, andare wide apart, (being near the ends of the latten) the whole gear'operates smoothly andv easily. In a rock-shaft connection the deflection of the end of the valve-rod by the oscillating arm causes the hole in the stuffingbox to wear vertically oblong, and sometimes knocking is caused by this or the Wear of the valve carrier or bridle, both of which defects in the operation of the engine are avoided in ICO opposite slide i2 and reversing the position of the bracket on the guide-bar.

I claim as my invention- 1. In a steam-engine, the combination of the valve-rod, the bracket connected therewith, the guide-bar to which the latter is'attachcd,

the plate having guide-boxes in which said guide-bar operates, the engine-slide on which i 2o said plate is secured, and the connecting-rod pivotally connected to the lower end. of Said bracket, as and for the purpose set forth.

2. The combination, with the plate, guideboXes, and guide-bar, of an oil-boat in said plate and means provided 'for allowing the waste oil therein to lubricate the cross-head and slide beneath it.

3. In a valve-movement for steam-engines,

i the combination, with the valve-rod and connecting-rod, of a bracket connected at its upper and lower ends with said valve-rod and connecting-rod, respectively, and aguide-bar operating in guideboxes attached to the slide of the engine, said bracket being reversible, whereby it may be operated with the valvef gear described by either a crank or eccentric connection, substantially as set forth.

In testimony whereof I alx my signature in presence of two Witnesses.

REINHARD SCHEIDLER.

Witnesses:

A. A. STAsEL, EDWARD KIBLER.

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