US110022A - Improvement in rotary engines - Google Patents

Description

6 Sheets-Sheet 1.

R. DUDGEON. ROTARY ENGINE.

No. 110,022. 4 Patented Dec. 13, 1870.

,6 SheetsSheet 2.

' ROTARY ENGINE. No. 110,022. Patented Dee. 13, 1870.

O '2 O O O I O I O l I I O O HI 0 0 IO 0 6 Sheets-Sheet 3.

R. DUDGEON. ROTARY ENGINE.

I No. 110,022. Patented Dec. 13, 1870 R.DUDGEON. RRRR RY NNNNN E.

No. 110,022. Patented Dec. 13, 1,870.

R. DUDGEON. RRRRRRRRRRR E.

5 Sheets-$heet 5.

, ted Dec. 13, 1870.

/: r i v 6 Sheets-Sheet 6. R. DUDG'EON. ROTARY ENGINE.

No. 110,022, Patented Dec; 13, 1870.

hair-1d can;

RICHARD DUDGEO-N,

OF NEW YORK, N.

Letters Patent No. 110,022, datedDecemb er 1 3, 1870.

impnovsmsn'r m ROTARY ENGihIl ZS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.-

Be it known that I, RICHARD Dunenox, of the city, county, and State oi' Ncw York, have made an invention of a new and useful Rotary Engine; and

that the following is a full, clear, and exact descrip-' -tion and specification of the same.

'The'invention consists of an engine which is a combination of the following instrumentalities, viz., two

cog-wheels geared together, cheek pieces to close the ends of the spaces between the cog-teeth,- and an entry-port so arranged as to admitsteam into the spaces between the cog-teeth at one side of the line connecting the axes of the two cog-wheels.

In this combination the practical 'eticct of admitting" steam at saidentry-port is to cause thewheels to turn on theiraxes in a direction extending from the line Y of the axes toward that side thereof atwhich the steam is'admitted. x

As the wheels turn each pair of cog-teeth passes over the steam port in succession, and acts'as'a valve foclose the supply of the steam to the space between it and the preceding pair of teeth, and to admitsteam to-tho spacebetween-it and the succeeding pair of teeth. Moreover, as the teeth gradually drawiout of engagement during their recession from the. steamport, the space between the teeth is enlarged, and the steam iuclosed in that space is permittedfto. expand progressively, the expansion beiugcontinued-until the teeth reccdc sufiicieutly to form an opening, where. upon the steam exhausts.

The invention consists, further, ot'the combination of the said cog-wheels, cheek-pieces, and entry-port, with a. second port, the two ports being arranged at opposite sides of the line drawn through the axes of the wheels, so'that one port may be used to supply.

steam when the wheels are run in one direction, and the other port may be used when the direction of mo tiouis to be reversed. This. combination is advan-' tageous because it permits the engine to be readily reversed by simply shutting off the supply of steam to oue-steam-port and admitting the supply to the other port. I

Theinvention consists, further, oft-he combination of the said cog-wheels, cheek-pieces, and steam-port with an external casing to receive the'exhaust steam, so that the said steam may be conducted to an 'exboost-pipe, and be thereby discharged in any desired direction. v

.. The invention may be embodied in various forms, a

cw of which are represented in'the accompanying drawing as illustrations ofthe'diversity of form which the invention may assume without a change in its principle.

Figure 1 represents a side elevation of one form of rotary engine embodying the invention.

Figure 2 represents a'vertical'longitudinal section of the same.

. Figure 3 representsa plan of" the engine with oer tain portions removed.

The two cog-wheels A Af are. secured to shafts B B, which are constructed to turn in boxes 0 c o'rmed in the casing D, one ot' the shafts B extending sufficiently beyond the casing to receive a pulley-wheel, E, to which a belt maybe applied for the purpose of transmitting the power.

. .The teeth of the two cog-wheels should he. care fully scraped, so as to engage accurately throughout their wholelength and prevent the p'assageot' steam between their contiguous faces. 7

The sides of the wheels, as far as the ends .of the teeth-and the rims, should also be carefully faced off,

so that these sides may move steam tightz gains't the -.adiacent faces of the check-pieces'EF, which close the ends of the spaces hetweenthe teeth of the wheels. These cheek-pieces F; F .are ,fitted into sockets formed for the purpose in thecasing' D, and are constructed to be pressed against andheld in contact with the adjacent sides .of the cog-wheels bymeans of set-screws, which are not shown in the drawing.

One of the cheek pieces is perforated to form the steam-port c, by means of which steam is admitted into the adjacent space'between the teeth of the two cog-wheels; the steam, being supplied to this port by meanspf a steam-pipe which leadsfrom ,theboiler, is counectedwvith the rear side of the port, and is provided with a throttle-valve.

The steam-port 'e is arranged to admit the steam into the said space when it is at one sideof the dotted line B B, drawn through the axes of the two cogwheels, so that the aggregate of the portions of the surfaces of the cog-teeth in "1,11 ,011 which the steam can act atone side oft-he said space, is greater than the aggregate of the portions of the surfaces of the cog-teeth a 11, upon which-the steam can act at the other side of that space, Hence, when steam is ad'- mitted into thespace between the cog-teeth, the prepouderating pressure uponthe teeth In m'will cause the wheels to-turnin the direction of the arrow f. I

As the wheels turn the space is gradually enlarged by the recession of the teeth from their engagement, so that the quantity of steam admitted increases until one of the succeeding set of teeth it passes over the steam-port and closes it for the first space.

' The steam which is now within that space is permitted'to expand by the continu enlargement of the space produced by the turning o the wheels, and expansion will continue until the teeth at the advancing side of the space recedc snificiently to form an opening and permit'the steam to exhaust.

' Meanwhile, the tooth which closed the steam-port to the first space has passed by it sufficiently to open it between the succeeding space between the teeth,

and this space in turn receivesa supply of steam to act inthe-same manner as the supply to the precedmg space. 1 H

The steam, operating in succession upon' all the spaces between the teeth of the 'two'wheels, produces a continuous rotary motion withoutijar, and this motion may be transmitted directly to the machinery to be driven by-the belt-pulley E and a belt. or by other transmitting mechanism.

In order that the direction of motion of the engine may be reversed, a second steam-port, e, is provided at the side of the line. B B, opposite that at which the first steam-port e is situated.

This second port is Supplied. with steam-by means of a steam pipe connected with it and fitted witha throttie-valve; hence, when the engine is to be re-' versed the throttle-valve of the first steam-port is closed and that of the other is opened, whereupon motion commences in the direction indicated by the arrow 9 in fig. 2.

The form of the engine and the shape of the cogteeth may be'vaiiedto a great extent without changing the principle of the invention. Thus, for example, the cog-wheels of the engine thus faridescribed are plain spur-wheels, with the teeth of both wheels of the ordinary form. Teeth of different forms are represented in profile in Figure 4, in which-figure the letters indicate the same parts as the corresponding letters in the previous figures.

In the form of engine represented at Figures 5," 6.,"- and 7, the cog-wheels A A have-conical faces similar to those of beveled wheels.. 7 The cheek-pieces. F F are of spherical form, the one, F, convex, and the other, F, coucavej and. the teeth are of different dimensions, the teeth h of .one wheel having concave sides and being very "broad, while-the teeth h of the other wheel are very narrow.

'Wheels of this construction should not have less than eight teethon each wheel; four only are represented upon the wheels in the drawing, in orderthat their forms may be more clearly seen.

Figure 8 represents a transverse section of another form of engine, and

Figure 9 represents the arrangement of the teeth in profile. v

In this form th e-two tooth ed wheels A A have beveled faces, and areboth constructed with broad teeth similar to those, h, of onepf the wheels of the last preceding engine'. 7

As the teeth do not engage with each other, a separate piece, H, is provided, to engage simultaneously in the opposite cavities between the teeth of thetwo wheels. v

This piece H consists of two wings, 'r. =r, which are secured to a bolt, s,'so as to change their relative positions like the two parts of a hinge.

The bolt '3 connectsthe piece- H with the spherical casing 1*", which forms thccheek-piccc at the outer ends of the cog-teeth.

- The steam is supplied in this'case by a steam-port, e, formed in astationary hub, T, that surrounds one of the -wheel-ln1bs,,'andthe exhaust takes place through a similar port, ufformed in a stationary hub, T, surrounding the hub of the other wheel, A.

The space between each set of teeth is connected withthe steam-port by'mea'ns of a passage, 'u, and with the exhaust-port by means of a passage, 1:. In this case the spherical. cheek-piece 13- revolvcs with the wheels. v

The drawing, fig. 8, represents a sect-ion of the engine taken in a plane which is at right angles to the plane in which the axes of the two wheels diverge.

In practice,'I- propose to use aslide-valve operating against the back face of the cheek piece to reverse the engine, the valve being so arrangedthat when it .ismoved to the greatest extent in either direction it will open a port at one side of the line-joining the centers of the wheelsand close the 'port at the opposite side of that line, and when the valve is in its central position both ports will be closed.

The engine maybe used as a condensing-engine as well as a high-pressure engine. -In the former case with a port formed in one of the cheek-pieces at the side of the line joining the centeis of the wheels op posite the side at which the steam-port is arranged.

I also propose to employ the engine as a pump,by' connecting one or more of the'steam-ports in the cheek-pieces with the source from which the water is to be taken.

' Having thus described several modes in which I have contemplated the application of theprineiple of my'invention, I declare that. I am aware that cogwheels have been empl'oyedin the."eonstruction of many rotary engines long previous to my invention,

other-members, which are required to constitute my new combination; but v What I claim 'as my invention, and desire to secure by Letters Patent, -is

l. The combination, substantially as before set forth, 'of two cog-wheels, the cheeh-pieees,aud the entryport, arranged to admit steam, as described.

of the two'cog-wheels, the cheek-pi eees, and two ports, arranged as described. 3. The combination, substantial] y as before set forth, of the two cog-wheels, the cheek-pieces, the entry-port, and the exterior casing.

In witness whereof, I have hereto set my hand this 18th day of April, 1870.

RICHARD DUDGEON.

Witnesses:

WALTE BUCHANAN. JOHN F. DETTMAR.

the exterior casing'may be connectedwith the cpndenser, or the condenser may be connected by a-pipe' and therefore I do not claim them separately from the 2. The combination, substantially as before set i'orth,

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