US322334A - House - Google Patents

Description

(No Model.) 2 Sheets-shat i.

H. H. WESTINGHOUSE.

STEAM ENGINE.

No. 322,384. Patented July 14, 1885.

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H. H. WESTINGHOUSE.

STEAM ENGINE. No. 322,334 Patented July- 14, 1885.

INVENTOR.

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UNITED v STATES PATENT OFFIC H. HERMAN WEsTI GH UsE, OF W YORK, N. Y., nssieNon TorHE WESTINGHOUSE MACHINE COMPANY, OF PITTSBURG, PA.

STEAM-ENGlNE.

SPECIFICATION forming part of Letters Patent No. 322,334, dated July 14, 1885.

Application filed May 12, 1885. (No model.)

To aZZ whom it umy-concern:

Be it known that I, H. HERMA WESTING- HOUSE, residing at New York, in the county of New York and State of New York, a citizen of the United States, have invented or discovered certain new and useful Improvements in Steam-Engines, of which improvements the following is a specification.

In the accompanying drawings, which make part of this specification, Figure 1 is a Vertical longitudinal central section through a steamengine embodying my invention; Fig. 2, an end view in elevation of the same, as seen from the right; and Fig. 3, a vertical transverse section at the line a: w of Fig. 1.

My invention more particularly relates to the type of engines having one or more singleacting cylinders whose pistons are connected to the cranlepins of a crank-shaft, which rotates within a closed case, serving as the bed or support of the engine, and also as a tank or receptacle for lubricating material, instances of which are exemplified in my Letters Patent Nos. 240,482 and 303,083, dated April 19, 1881, and August 5, 1884, respectively.

. The object of my invention is to provide a si mi ple, effective, and inexpensive engine adaptable either to stationary or marine service, which shall occupy a comparatively small compass, and enable the advantages of an automatic cut-off to beattained by mechanism which is free from complication or liability to derangement and readily accessible for desired renewal or repair.

To this end my improvements consist in certain novel devices. and combinations hereinafter fully set forth.

In the practice of my invention one or more single-acting cylinders, l 1, (in the'instance shown two being employed,) are secured upon the top of a closed cranlecase, 2, which serves as the bed or support of the engine, and also as a tank or receptacle for thelubricating ma terial of the crank-pins and the journals of the crank-shaft 4, which rotate in bearings 5 5, secured in the ends of the case 2.

Access to the cranks may be had, when required, by the removal of a bonnet, 6, on the side of the crank-case, and additional support is afforded to the crank-sh aft by a center hearing, 7. The cylinders 1 1 are open at their lowerends, and are fitted with long pistons 8 8 of the trunk class, which are coupled by connecting-rods99 with crank-pins setoppositely, or at an angle of one hundred and eighty de grces, upon a pair of double cranks, 10 10, on the crank-shaft 4.

So far as above set forth the construction of the engine accords generally with that of my Letters Patent aforesaid, and is not, therefore, claimed as of my present invention.

Steam is admitted to and exhausted from the cylinder-spaces above the pistons 8 by a main or distribution valve, which is preferably, as shown, of the piston type, and is fit ted to reciprocate longitudinally of the engine in a valve-chest, 3, formed upon or secured to a cap-plate, 12, which closes and forms the heads of the upper ends of the cylinders l 1.

In the instance illustrated the distribution- 7c valve is composed of a pair of suitably-packed pistons, 38, connected by a body, 39, secured upon a valve-stem, 16, passing through a long guide, 17, and packed stuffing-box 18 in one of the heads of the valvechest, the valve- 7 5 pistons fitting accurately within a cylindrical casing, 40, in the chest. Steam is admitted to the valve-chest through an inlet or supply pipe, 11, cored in the cylinder-casting between the cylinders, and passes from the chest into the valve-casing 40 through ports 13 therein.

In the traverse of the valve the steam which enters the casing 40 is supplied to the cylinders through ports 14in the head or cap plate 12 of the cylinders as said ports are alternately placed by the valve in communication with the casing-ports 13, and is exhausted through the ports 14 into the space between the valvepistons 38, from which it passes through a 7 port, 43, in the casing 40 into the exhaust-pipe o 15, which is cored in the cylinder-casting below and adjoining the steam-pipe 11.

It will be obvious that if desired the valvechest may be located upon the side of the cylinder, in lieu of upon the cap-plate, as 5 shown, in which case the ports 14 would pass through the shells of the cylinders into the upper end thereof, instead of being formed in the cap-plate.

Movement is imparted to the main valve by an eccentric, 21, which is fitted freely upon the crank-shaft 4, adjacent to the outer supported upon a fiy-wheel or pulley, 25, fixed to the crank and acting as a governor-disk in addit on to the performance of its ordinary functlon. An arm, 28, 011 the eccentric 21, is

V pivoted to a pin, 24, on the governor-disk, and

the eccentric is coupled by links 29 to arms 28, pivoted to the disk 25, and carrying weights 26 at or near their free ends. The requisite centripetal action is provided by springs 30, coupled at opposite ends to the weight-arms and to the disk, respectively.

The valve-stem 16 is connected by a link, 44, to the upper arm of a bell-crank or angle lever, 45, journaled in bearings 46 on the side of the cylinder nearest the eccentric, and the lower arm of the bell-crank 45 is coupled by a ball-and-socketjoint to the eccentricrod 19, said joint being composed of a ball or spherical enlargement, 47, on the end of the bellcrank arm, and a socket of corresponding form recessed in the head 48 of the eccentric-rod and in a cap, 49, secured thereto. Theincident longitudinal vibration of the eccentricrod is provided for either by pivoting the rod to the eccentric-strap 20 or by turning the eccentric to the form of a spherical zone, as shown, and correspondingly recessing the eccentriostrap.

In lieu of actuating the main valve by an eccentric, which is varied in position relatively to the crank line by a centrifugal governor regulator, as above described, the governormay, in engines designed for marine or other service in which its employment may not be deemed essential or desirable, be dispensed correspond.

the movement of the engineer a link-motion,

or other mechanism for reversing, applied in connection with a pair of fixed eccentrics.

Such minor variations of structure being within the ability of those skilled in the art to which my invention relates, and not constitutingpcr se, part of the same, need not be herein at length described.

I claim herein as my invention 1. The combination of one or more singleacting cylinders, each having its piston coupled to acrank-pin upona shaft fitted to rotate in a closed crank case or receptacle, a main or distribution valve adapted to reciprocate longitudinally to the cylinders in a valve-chest communicating therewith by ports opening into their upper ends, an eccentric located upon the shaft exterior to the crank-case, and a bellcrank or angle lever having one of its arms connected to the valve-stem and the other coupled by a universal joint to the rod of the eccentric, substantially as set forth. 1

2. The combination of a pair of single-acting cylinders, each having its piston coupled to a crank-pin upon a shaft fitted to rotate in a closed crank case or receptacle, a main or distribution valve reciprocating longitudinally to the cylinders in a valve-chest com municating therewith by ports opening into their upper ends, a centrifugal governor or regulator fixed upon the crank-shaft exterior to the crankcase, an eccentric mounted freely on the shaft and coupled to said governor, and a bell-crank or angle lever having one of its arms connected to the valve-stem and the other coupled by a universal joint to the rod of the eccentric, substantially as set forth.

In testimony whereof I have hereunto set my hand.

l-I. HERMAN WVESTINGHOUSE. \Vitnesses:

RICHMOND BREWER, ROBERT C. YOUNG.

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