US82285A - browne - Google Patents

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AURTHUR W'BROWN E, OF BROOKLYN, NEW YORK, ASSIGN OR TO CHARLES R. SQUIREOF NEW YORK CITY. i i

Letters Pate-nt'No. 82,285, dated September 22, 1868.

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,TO ALL WHOM IT MAY OONCERN i Be it known that I, AURTHUR W; BROWNE, of Brooklyn, county -of Kings, and State of New York, have inveted certain new and useful Improvements in Rotary Engine's; and I doherehy declare the following to be a full, clear, and exact description of the same, reference being had tothe accompanying drawing, making a part of this specification, in whichi 'Figure lis a Vertical transversc section. i w i Figure 2 is a side elevation of the shell er cylinder with the upper portion broken away, for the purpose of showing the form 'of the steam-chamber lin section.

- Figure 3 represeuts one of the piston-slides'detached.

Similar letters of reference denote corresponding parts in all the 'figures.

My invention relates to that class of rot'aryl engines which have a drum inside of and eccentric to the shell Vor cylinder, andV which is driven'or made to'revolve by the pressure of the steam upon a pistou or pistons, which slide or vibrate in slots through the drum, at right anglesto its axis, thus conforming readily to the contour of the shell. i I I My improvement consists in the construction and arrangement of parts whereby friction, and consequent wear and leakage, are largely prevented, and also wherehy, 'on account of the engine being made more efl'ectually self-packing, the waste of power from unavoidable wear is greatly reduced. v

In' order that others skilled in the manufacture of engines may be enabled to make anduse my invention, I will proceed to describe it, with reference to the drawings. v

A is the shell or outer cylinder, ,which may be made in one piece or in segments. For the sake of convenience, I shall speak of it as being in segments. It is composed of the abutnient E E', provided with the pressurechamber O, and the two cocks D D.',` the segment HV H', and the two segments E Hand E' H'. The segment H H' I find is best made an exact are of ninety degrees, having a radius equal to the line H'I. The segments E H and E' H' should be eonstructed so as to conduct the pistons Gr to and from therpoints E E' H H', with as little friction and jar as possible, but beyondthat their exact' shape is immaterial. They have each a port, F F', for the passage of steam, communicating'with the pipes K K', which pipes are 'used elternately, for the Vpurposeof induction or eduction, as the engine is run either forward or backward. I

The steam-Chamber of the cylinder, that is, the eccentricspace e'xtending around the` drum B, from E to H, to, H',. to E', and transversed by the piston G, is made slightly flaring from its outer eircumferenca t oward its centre, so as to fit closely the piston, which is made a little wedging, as shown at G, fig. 2.

The abutment E E' is located on the side of the shell oppositeto the are H H', and must be long enough to bring the points E E' diametrically opposite to .these points H H7. Each end of the vahutment must fit accurately the drum i I C is the'pressure-'chamher, provided with two cocks, D and D' B is the drum, having slots or waysl extending through from side to sideyintersecting its axis, and atl'ight angles with the same, through which the pistons G-vibrate.

G G are the pistons, made in the usual form, except that at each end they are made in the form of awedge, as shown in fig. 3.

Having described the construction of ,my engine, I will nowproceed to explain its operation. Supposing that I wish it to run in thedirection indicated by the arrows at H, fig. 1, I open the cock D, close cock D', and

admit the steam by the pipe KV; pressure is instantly applied to one of the' pistons Gr, which is traversing the ,are H H', and whichs held closely in contact with the surface of the cylinder by theforce of the steam acting upon the other end of the same piston in the pressure-chamher C. .In case it is desired to run the engine in an opposite direction, I' close the cock D, open D', and admit'steam from the pipe K'. i

It'will be .seen that this construction does away with'nearly all the wearand conseduent leakage of steam pastl the pistonf, common to this class of engines, from the fact Vthat while the piston is passing from H' to E', and fis being pushed into the drum, as shown at E', it is not suhjected to the pressure of 'the steam upon either end; consequently it moves easiiy and with butlittle wear. This results from the extension of the ports F and F', from the pipes K and K', up to the poinlsH and H', as seen in fig. 1. Then, again, the nnavoidahle Wear upon both the ends and the edges of the pistons is provided for by oonstrueting them and the cylinder of lthe form described, and then, while the piston is traversing that portion of the cylinder between H and H' where steam is applied to it, a'nd the leakage would occur, it (the piston) is made to adjust itself by means of the pressure of the steam in the charnber C acting upon the opposite end of each piston during the time occupied in passing between these points, thus making the engine self-packing.

Having thus desoribed the construction and operation of my invention, what I olaim, and wish to secure by i etters Patent, is-`- 1.v The arrangement of the abutment E E', pressure-Chamber C, and the cocks D end D'. 2. The pistons G, when construeted as set forth. 3. The construction of the segment H H', forming the Chamber through which the piston passes while being octed upon by the steam, as'herein set forth.

4. The arrangement in the shell of the rotary engine of the abutments E'E', pressure-Chamber C, and segments H H', substantially as set forth.

A. W. BROWNE.

Witnesses:

JOHN W. TANNER, WM. F. GooDWIN.

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