USRE11743E - parsons - Google Patents

Description

.B'ssued May 23, |899.

l Nn. ||,743.

.1. n. Masons. ROTARY ENGINE.

(Application am Apr. 2v, labs.)

2 Sheets-Sheet I.

N0. ",743. Reissued May 23,- |899.' A J. H. PARSONS.-

ROTARY ENGINE. (Application fuga Apr. 21,1'999.)

z sham-'sheet z.

UNITED STATES PATENT OFFICE. y

.IoI-IN n. masons, or wILuINc'roN, DELAwAnnnssIeNon, `nv DIRECT ANI) MESNE ASSIGNMENTS, TO THE PARSONS INGINE COMPANY, OF

SAME PLACE.

ROTARY ENGINE. i

SIECIFCATION forming part of Reissued Letters Patent No. 11,743, dated May 23, 1899.

Original No. 605,906, dated June 21, 1898. Application for reissue filed April 27, 1899. Serial 110.7141758.

To au whom, I-t may con/cern: l Beit known that I, JOHN I-IJPARSONS, a citizen of the United States, residing at Wilmington, in the county of Newv Castle and State of Delaware, have invented certain new and useful Improvements in Rotary Engines; and I do hereby 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.

My invent-ion relates to alternating-piston rotary engines which comprise in their struc- Fig. 3 is a side elevation. A3S

' cylinder-head 2.

ture a stationary cylinder, two continuouslyrotatable pistons provided with cranks, and links so connected with a wheel or disk secured to an eccentric 'driving-shaft that said pistons will be alternately rotated at variable speeds.

The object of the invention is to provide an improved construction of rotary engine'which shall possess superior advantages with respect to eiciency in operation.

The invention consists in the novel construction and combination of parts, as hereinafter fully described and claimed.

In the accompanying drawings, Figure l is aside elevation of a rotary engine constructed in accordance with my invention, the cylinder-head being removed to show the pistons and'the piston-rims partly-b`roken away to show the openings therein. -Fig. 2 is a plan view of the same, partlyin horizontal section.

Fig'. 4 is a transverse sectional view on the line m Fig. 2. Fig. 5 is asimilar view showing the cranks and links in different positions.

In the said drawings the reference-numeral V1 'designates thecylindenprovided with heads 2-and 3, the inner head 2 being preferably castintegral therewith, while the outer one 3 is bolted to the cylinder. Also lformed with the' cylinder is a hollow base 4, divided by la central partition 5 into an inlet steam-chambei' 6 andan exhaust-chamber 7, provided .with inlet and exhaust pipes 8 and 9. -The inlet-chamber communicates with a steampassage 10, which in turn commu nicatcs with an inlet-opening 12 inthe inner side of the The exhaust-chamber communicates with an exhaust 13 in the cylinder. It will be seen that the inlet-opening-12 is contracted, as seen at 14, Fig. 1, for a purpose hereinafter described.

The head 2 of the cylinder is provided with a boss 15, thrbugh which passes a shaft 1G, on which is journaled a .sleeve 17, both of which are rotatable independently of each other. Secured to the said shaft is the hub 18 of a piston 19, while secured to or formed integral with the sleeve is a similar hub 20 of a piston 21. ends arecut away for about one-half of their length, so that the inner ends of the piston will overlap the same.

Formed centrally in the removable head of the cylinder are two-recesses 23 and .24, with which the shaft 16 and the hub 18, respectively, engage. A .washer 25 is interposed between said hub 18 and the cylinder-head, which is pressed against the hub by a spring 26,'so as to make a steam-tight joint, while a dowel 27 engages with slots in the cylinderhead and washer to prevent the latter from rotating.

The numeral 28 designates spring-pressed packing-strips inserted in grooves in the pistons. v The pistons are made hollow or formed with openings 29, extending therethrough and connecting the opposited side of said piston, the latter having apertures 30 in the rims. vThese. openings, it will be observed, are adapted to receive steam from the inlet in the head of the cylinder as the pistons 1'0- tate, so that the motive fluid will pass to both sides of the piston and counterbalance the same against end pressure. The purpose of these is to counterbalance the pistonsagainst the centrifugal force of the pistons when rotating at a highl speed, steam entering the pistons from the inlet-opening and pressing against the rim of the cylinder.

The numeral 81 designates the drivingshaft, eccentric to the cylinder andjournaled in bearings 32, supported by a standard 34.

Y are jou'rnaled links 37 and 38, which in turn are pivoted at iixed points thereon to cranks These hubs at their adjoining Secured to the inner end of this shaft is a Y3er-imi 4o, seein-ed te the shaft 416 and sleeve 17, respectively.

The operation is as follows: `ln the position shown in Fig. l steam is admitted between the pistons from the inlet-opening and will force the same in the direction shown by the arrows, therear pistonv acting as an abutment forthefrontone. front piston will.

-be rotated rapidlywith a gradually-increasing speed, while the rear one will rotate with gradually-decreasing speed until its speed is vaneing edge of the following piston andthe' pistn will b e further rotated byexpansion. As' the said pistonvnears the end' of its stroke the steam pressurewillgdecreasm but the power exerted on the driving-shaft will not vary,as theleverage of the crank and lin-k will be increased,owing totheir changein position.v Wlx'enihe front piston reaches the exhaust,the

othclpistlog will have reached the inlet-opening, when itill-become the fastpiston and .the other piston the slew'oner- This operation 1 will be kept up continuously as long as steam is supplied to the cylinder, the speed ofthe two pistons alternately varying. A When the v, rear edge of the front piston reaches the exhaust to open the same, the crank, link, and the driving-shaft disk will be`justiapproach--' ing or on a center, so that any exertion of' pressure on either side of the piston will be resisted, at which time the leverage of said 'l piston is the least, and it changes from the acting piston to the abutment, while the otherl piston is on the point of becoming the acting piston'. At oir-slightly prior to this position, however, whenthe said front piston has started to move away from the abutment-piston and in order .to provide a cushion between the two pistons at such time to insure smoothrun' ning and at the same time admit motive fluid between the pistons atthe proper time to insure forward movement withoutA undue back pressure, I contract the forward end of the inlet-port 12, as shown at'14, Fig. l. This construction therefore PITDVdes for a retardation o f full admission ,or reduced supply of motive fluid until the leverage of the piston I to become active has become greater than the other piston, avoiding undue back pressure and reducing to a minimum any tendency to shock or jar. As' this-latter piston continues' its movement the leverage between its crank and the link and the driving-shaft disk will be increased, so that the front Ypiston will ro-v tate about four times as fast as the back one when the maxim um speed of the front piston is attained, the back pistou being moved forward after its crank and link passesthe center by the movement of the said disk and the connections. There are no valves admitting and exhausting steam, and there will be only one dead-center to be overcome for each complete revolution of `the acting piston-nam ely, when the twopistons are closest to eachother, at which timethe admission of steam through 'the contracted inlet will cause the front piston to continue 'its movement in the proper direction. y'

Having no w fully described my invention, what I claim as new, and desire to secure by LettersPtent, isr 1, In arotary engine, the combination with and sleeve and pivotally con 'nected to the link,

substantiallyas described.

2. In a rotary engine,l;the combination with the cylinder, the base formedwith an inlet and exhaust chamber, and the rim formed with an exhaust-opening, and the cylinder formed with an inlet-opening with a contracted end, and the inlet-pipe communicating therewith and with the inlet-chamber, of the rotatable shaft, the sleeve, the `alternately-operating pistons, formed with steam-chambersand with openings in the rims,I the eccentric vdriving- 'shaft the disk secured thereto, the links pivotally connected with said disk at diametrically opposite points, and the cranks secu-red rto saidshaft and sleeve and pivotally connected with said links, substantially "asdescribed. Y y n 3, In rotary engine theeombination with the stationary cylinder, provided with an inlet in the head thereof, and an exhaust communicating with said cylinder, of the rotatable shaft, the sleeve jonrnaled thereon, the pistons acting alternately as an abutment'and piston, each providedlwith an opening there\ through connecting the opposite sides thereof and adapted to receive steam from the inlet as the pistons rotate, the eccentric' driving-shaft, the disk secured thereto, the links pivotally connected with said disk at diametrically opposite points, and the cranks 'secured to said shaft and sleeve and pivotally connected with the links, at fixed points thereon, substantially as described.

' Q4.; Ina rotary engine, Athe combination with a cylinder having an exhaust-port, a shaft, pistons carried by said shaft acting alternatelyasan abutment and piston, an eccentric driving-shaft, connections between said driving-shaft and piston, so constructed as to cause the pistons to move alternately at' varying speeds, said cylinder being provided IOD los`

IIO

with an inlet-port having a contracted en d,

j adapted to admit'the motive fluid gradually between the pistons when they approach each other, substantially as and for the purpose set forth.

5. In a. rotary engine, the combination with a cylinder, pistons in said cylinder, a. shaft by which said pistons are carried,a. d riving-shaft, connections between said drivin g-shaft and pistons, so constructed as to cause the pistons to rotate alternately at varying rates of speed saidcylinder having an inlet-port controlled bythe movements of the piston and provided with a contracted end, whereby a reduced motive-fluid supply is admitted between the pistons prior to a full admission, substantially as and for the purpose set forth. In testimony whereof I have aixed my signature in the presence of two witnesses.

JOHN H. PARSONS.

Witnesses:

' EvA M. POOLE,

CHARLES W. GoonING.

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