US30224A - Kotaby engine - Google Patents

Description

W. HUMPHREYS.

ROTARY Enema PATENTED OCT. 2, 1860.

*rmlsr FROM PATENT OFFICE REPORT 1860 VOL. 1:,

ONLY DRAWING ACCESSIBLE (1916) UNITED STATS as ice.

YVILLIAM HUMPHREYS, JR., OF GOLD SPRING, NEXV YORK.

ROTARY ENGINE.

Specification of Letters Patent No. 30,224, dated October 2, 1860.

To all whom it may concern:

Be it known that I, VILLIAM HUMPHREYS, Jr., of Cold Spring, in the county of Putnam and State of New York, have invented a new and Improved Rotary Engine; and I do hereby declare that'the following is a full, clear,'and exact description of the same, reference being had to the accompanying drawing, forming a part of this specification, in which Figure 1' represents a sectional side ele vation of this invention. Fig. 2 is a plan or top view of the same. Fig. 3 is a transverse vertical section of the same taken in the plane indicated by the line 00, m, Fig. 2, and looking in the direction of the arrow marked near to that line. Fig. f, is an end elevation of the same, the fly wheel having been removed to expose the working parts of the engine. Figs. 5, 6, 7, 8, 9, and 10, are detail arrangements of the steam valve chest and its connections. Figs. 11, 12, and 13, show the modifications necessary to make the engine condensing.

Similar letters of reference in all the figures indicate corresponding parts.

The principal object of this invention is to prevent the escape of steam at, and around the working surfaces of the engine, and also to arrange the steam valves in such a manner and in such relation to the steam cylinder, that by a simple change in the position of a hand wheel the engine can be reversed.

The invention consists, first, in combining the cylinder, the cylinder heads, and the flanged piston, in such a manner, that an annular recess is formed on each end of the cylinder to receive the packing, and that all the packing, being exposed to surfaces working at equal velocity, wears out more even and more uniform than the packing as now arranged with rotary engines of the ordinary construction; second, in arranging the rising-and-falling steam abutment with adjustable ends or packing plates to prevent an escape of steam on the ends of said abutment where the same is brought in contact with the end flanges of the piston; third, in the arrangement of the rising-and-falling steam abutment in the interior of a closed chamber which communicates with the condenser in such a manner that if the engine is to be worked at low pressure or with condensation, the pressure on both sides of the steam abutment is balanced thereby preventing an undue strain on the links through which motion is communicated to the abutment and also preventing the abutment from slamming on the surface of the piston; fourth, in the arrangement of a hand rock shaft, with a pinion and two eccentric cams in combination with a double slide valve and with the usual bow link and eccentrics on the driving shaft in such a manner that by turning said hand rock shaft in one direction or in the other one or the other of the valves is brought into action and the engine reversed.

To enable those skilled in the art to make and use my invention, 1 will proceed to describe its construction and operation with reference to the drawing.

The frame or bed-plate A, supports the stationary cylinder B, the latter being attached to it by means of screw bolts and flanges in the usual manner. The piston C, rotates in the interior of the cylinder B, on the driving shaft 64, and this shaft has its hearings in journal boxes 6, at either end of the bed plate A. The piston is provided with two projecting flanges 0, one at either end and a projection (Z, extending in a longitudinal direction from one flange to the other and fitted up with suitable packing works steam tight against the inner surface of the cylinder B. The flanges c, are made of equal height with the projection cl, and they fit nicely into the cylinder, the latter being provided with annular recesses e, to receive the packing. This packing consists of a series of composition packing rings f,-

made in sections so as to break joints and to admit of setting toward the center for the purpose of preventing the escape of steam. These packing rings surround the horizontal circumference or face of the flanges c, of the piston and they are set up by set screws 9', that act against the packing pieces h, which surround the outer circumference of the packing rings f. The packing rings. f, and the packing pieces h, are kept in the recesses e, by means of heads or covers 2', which are fastened to either end of the cylinder by means of screws 2", and they are made of such a form that they bear sufficiently hard against the packing pieces h, and rings f, to prevent them revolving with the piston. By these means the working surfaces, viz., the faces of the flanges c, and the face of the projection (Z, are

made to revolve with the same speed and the packing therefore will wear out uniform all over and it can be kept tight.

The cylinder B, is provided with an abutment D, which slides up and down in the guide box IE, and which is raised at the proper intervals by means of cams j, on the driving shaft a, to a sufficient height for the projection (Z, on the revolving piston to pass by. This abutment works steam tight on the surface of the piston C, between the flanges 0, its face being provided with suitable packing or otherwise made to fit tight on said surface and its ends are provided with movable packing plates 70, that are set up against the inner sides of the flanges c, and against the packing rings f, and packing pieces 71., either by means of adjustable wedge shaped keys Z, acting on thewedge shaped packing pieces Z, as shown in Fig. l, or by set screws l and springs Z*, as shown in Fig. 12, or in any other suitable manner. That portion of the packing plates lo, which comes in contact with the inner sides of the flanges 0, may be furnished with a suitable packing is, which can be renewed in case of wear. By these means the escape of steam from one side of the abutment D, to the other is entirely obviated, and the packing plates k, can be adjusted so nicely that they create little or no friction.

When the engine is to be worked at high pressure (without condensation) the abutment projects beyond the box IE, and its sides are made to work steam tight in said box by means of packing pieces m, which are set up by means of set screws 9% and they connect with the cams by means of links n. These links are made out of two pieces, being connected by a sleeve having a right and left handed thread cut on the inside, which is used for the purpose of adjusting the sliding abutment, so that, when it is lowered, it will not slam on the surface of the revolving piston but merely come in contact with it so as to prevent the steam from passing between the surfaces. The connection between the links a, and the cams j, is effected by levers 0, which are pivoted to the ends of the cylinder B, and which also connect with the frames j, to which a rising and falling mo tion is imparted by the cams j. If, on the other hand, the engine is to be used at low ressure or with condensation, the abutment and box E, is to be arranged as shown in Figs. l1, l2, and 13. In this case the abutment is inclosed in the box E, the latter being covered over by a bonnet a with two stufiing boxes 6 for the stems 0 to work through. These stems connect with the cross-bar d the ends of which connect by means of the links it, levers 0, and frames j, with the cams j. The upper portion of the box IE, connects by a small pipe e with the condenser and if now a vacuum be formed within the condenser and on the exhaust side of the projection (Z, on the revolving piston, causing a vacuum throughout the entire annular space between the revolving piston and the cylinder during the time of raising and lowering the abutment, there will be a vacuum on the upper side of said abut-ment as well as on its under side, and the abutment will be perfectly balanced thereby preventing any unnecessary strain upon the links n, and their connections and also preventing the abutment from slamming on the surface of the revolving piston.

The steam is admitted to the engine through the pipe 37, which connects with the valve chest F, in the usual manner, and the valve chest communicates with the cylinder B through pipes g, g, which emanate from the opposite sides of the valve chest and connect with the cylinder on opposite sides of the abutment D. There are also two exhaust pipes 7", 1", which communicate with the cylinder on opposite sides of the abutment and conduct the exhaust steam from opposite sides through the exhaust valve chest G, to the exhaust pipes s. This double set of pipes is necessary for the purpose of reversing the engine and this object is effected by the double valves t, t, which work in the interior of the Valve chest F. The valves are adjusted by a hand rock shaft 7, with two eccentric rollers Q}, o, the eccentricities of which are opposite to each other and which work in the open ends of the valve rods u, a. By turning the rock shaft T in one direction or in the other, one of the valves t, t, is brought farther from the center of the driving shaft and the other is brought nearer to this center, and these valves are so arranged, that the valve which is moved farthest from the center of the driving shaft, admits steam at the proper time and closes at any part of the revolution of the piston for which it may be adjusted, whereas the valve that is nearest to the center of the shaft, is in such a position, that, it remains closed during the entire stroke or revolution of the piston. The rock shaft 1, is operated by a hand wheel H, and by giving to this hand wheel one half revolution the position of the valves t, t, is reversed aiid the engine is made to take steam in the opposite direction.

If the valve takes steam through the valve 2?, and the pipe 9, it exhausts through the pipe 1, which communicates through the space to, in the exhaust valve chest G, with the exhaust pipe 8. By referring to Fig. 12, it will be noticed that this space is partitioned off from the remainder of the interior space of said valve chest and from the pipe 1', by the exhaust valve G, the position of which is governed by the rod 7", and arm 9 If the engine is reversed so that it takes steam through the pipe 9, the position of the exhaust valve G, has to be changed so that it partitions off the space w, and that it brings the pipe 1', in communication with the exhaust pipe 8.

The valves 2?, t, are operated by means of eccentrics I, I, one of Which gives motion to the valves While the engine is running in one direction, and the other While the engine is running in the opposite direction. The action of the eccentrics is governed by a bow link M, which embraces the rock shaft 1 and the position of Which is changed by a pinion 2' on said rock shaft, so that by giving to said rock shaft one half revolution, the valves 6 t, are changed, by the action of the eccentric rollers 71, Q1, and at the same time the eccentrics are changed by the action of the pinion 2' This engine can be Worked at high or low pressure with equal facility. It can be reversed by a simple motion of the valves, and the packing in the cylinder and on and around the piston is so arranged that an escape of steam is obviated, Without creating an undue friction on the Working parts.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is-

1. The arrangement of the annular recesses e, in the ends of the cylinder B, in combination with the flanges 0, 0 on the piston C, and With the cylinder heads or covers 2', constructed and operating sub stantially as and for the purpose described.

2. The arrangement of the adjustable packing plates 1:, in the ends of the sliding abutment D constructed and operating substantially as and for the purpose set forth.

3. The arrangement of the abutment D, in the interior of a closed box E, in combination with the pipe 6 constructed and operating substantially in the manner and for the purpose specified.

l. The arrangement of the hand rock shaft 4, With eccentric rollers v, o, and a pinion i, in combination With the valves 2?, t, and eccentrics I, I, the Whole constructed, combined and operating as and for the purpose described.

WILLIAM HUMPHREYS, JUNIOR.

itnesses F. RUMPF, JULIUS HORNIG.

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