US2896A - Botaby steam-engine - Google Patents

Botaby steam-engine Download PDF

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US2896A
US2896A US2896DA US2896A US 2896 A US2896 A US 2896A US 2896D A US2896D A US 2896DA US 2896 A US2896 A US 2896A
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steam
hub
valve
chamber
shaft
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F01C1/356—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F01C1/3562—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation

Definitions

  • Figure l isV a vertical section through the center of the engine the axle being perpendicular.
  • Fig. 2 is a horizontal section of the engine on the line a' m of Fig. 1 showing' the hub and radiating piston.
  • Fig. 3 is a horizontal section on the line o o of Fig. l, showing the grooved steam way or channel in the hub.
  • Fig. 4 is a view of the top plate.
  • A is the revolving shaft arranged in a vertical position. This shaft maybe placed horizontally.
  • B is the hub fixed to and' revolving with the shaft;
  • C the piston radiating from the hub B and revolving with it.
  • This piston is hollow in the center forming a steam way communicating with a steam way in the center of the shaft; D, the
  • the grooved part of the hub This is made of greater diameter than the part of the hub from which the piston radiates.
  • the groove or channel F is circular of suflicient depth to form aV steam way for the escape of steam, a segment of which w extends entirely through grooved part of the hub to permit the steam to pass from the steam cylinder into said circular steam way which is on the under side of the hub E, the steam chamber in which the piston revolves.
  • This is a circular plate reamed out forming the steam chamber the center of which being of the diameter of the grooved part of the hub and of suiicient depth to receive the same.
  • This plate is called the bottom plate and has a circular ange perforated for screw bolts which fasten the top plate to it;
  • Gr top plate of the steam chamber made of the same diameter perforated in the center with a round aperture for the shaft and two oblong apertures for the valves to work through;
  • H H sliding or reciprocating valves.
  • valve chamber fixed to the outside of the steam chamber and in which the valves move made vin the usual maner, with grooves in the ends thereof for the ends of the valves to slide inV K K stuffing boxes through which the valve rods move fixed to.
  • This cam wheel is circular in the plan and winding or spiral in its side elevation, for raising and lowering the valves alternately as it turns horizontally
  • P the stuiing box of the shaft secured to the top of the valveV boxes in the center thereof.
  • Q a stuffing box of the sha-ft fixed to the under side of the bottom plate ofthe steam chamber.
  • R is the condenser secured to the under side of the bottom plate of the steam chamber over the escape aperture therein.
  • S pump for exhausting the condenser.
  • T tube for supplying the condenser with cold water furnished with astop cock for regulating the Y supply.
  • V aperture in the shaft for the admission of steam which is conducted from the boiler through the .tube I).
  • N aperture in the piston communicating with the aperture /U in the shaft for conducting the steam to the chamber.
  • This'aperture extends from the center of the shaft horizontally through the hub and through the radiating piston nearly to the outer extremity of the piston it then turns at right angles and passes out at one side thereof in the manner of the Avery steam engine.
  • W the aperture in the hub for the discharge of the steam.
  • This Y l l 105 aperture extends entirely through the hub nearly a quarter of the circumference of the circular Vsteam way in the hub with which it communicates and 'with the steam chamber as before described.
  • X screw bolt for securing the top plates of the steam chamber to the flanged rim of the bottom plate.
  • V screw bolts for securing the plates of the CTI valve chambers to the top plate .of the steam chamber.
  • e is a segment groove in the hub to allow the steam to pass from one side of the valve to the other as the valve descends to equalize the pressure of the steam on both sides of it until the valve is entirely down upon the bottom of the steam chamber to prevent any impingement of the valve in the straight grooves.
  • This segment groove is upon the top of the hub opposite the escape aperture w of sufficient depth to allow the steam to passfrom one side of the valve to the other, as the hub revolves and as this groove passes the valve the passage of the steam is cut off and a tight chamber is then formed which will cause the steam to have complete action against the piston.
  • This segment groove may be in the side of the smaller diameter of the hub in any convenient part of the hub.
  • The' circular steam chamber E 'in this modification is represented in a horizontal position in which the two circular plates become top and bottom plates; butV as before stated the shaft may be in a horizontal position and the chamber be vertical or placed edgewise in which modification the circular plates become end plates.
  • valves are arranged on the radius of the steam chamber on oposite sides of the shaft and in a direct line. rThe piston radiates from the hub in a direct line,A arranged vertically under the highest part of the cam wheel therefore when these are in a direct line with the line of the valves the valve will be raised or be withdrawn from the chamber so as to allow the piston to pass it without obstruction.
  • the steam is conducted to the interior of the steam chamber E through the hollow shaft A and piston c and acts against the piston at right angles and propel it around in the circular steam chamber by its elasticity, being confined by the valves H which are pushed into the steam chamber and withdrawn therefrom alternately so as to allow of the action of the steam and the escape of the same at the required periods of time to keep up the rotary motion of the shaft desired by means of the aforesaid cam wheel 0 which is adjusted on the revolving shaft to produce that result.
  • the steam is caused to escape at every semi revolution of the hub and at the moment of withdrawal of the valve from the chamber which has the effect of reducing the friction against the sides of the valves which would be produced by the pres sure of the steam if the'steam were not let off simultaneously with the receding of the valve.
  • the impingement which would be produced by the pressure of the steam against the valves as they enter the steam chamber is removed by allowing the steam to pass from one side of the valve to the other along the segment groove in the upper side of the hub for equalizing the pressure of the Vsteam on both sides of the valve until the valve reaches the bottomV of the steam chamber where a perfect stop or head is produced for the action of the steam by the flat or plain part of the hub being brought under the edge of the valve.
  • the steam begins to escape as soon as the eduction slot 1U in the hub passes the valve; the steam passes into the circular groove or channel F in the hub D, from whence it passes through the aperture a in the bottom plate of thev steam chamber into the condenser R where it is condensed.

Description

unirse .sauras PATENT orrron.
WILLIAM JONES AND ROSWELL FARNUM, OF BRADFORD, VERMONT.
ROTARY STEAM-ENGINE;
Specification of Letters Patent No. 2,896, datedv December 31, 1842.
To all lw'wm t may concern.'
Be it known that we, WILLIAM JONES and IoswELL FARNUM, of Bradford, in the county of Orange and State of Vermont, have invented a new and useful Improvement in Rotary Steam-Engines, which is described as follows, reference being had to the annexed drawings of the same makingV part of this specification. y
Figure l isV a vertical section through the center of the engine the axle being perpendicular. Fig. 2 is a horizontal section of the engine on the line a' m of Fig. 1 showing' the hub and radiating piston. Fig. 3 is a horizontal section on the line o o of Fig. l, showing the grooved steam way or channel in the hub. Fig. 4 is a view of the top plate.
A is the revolving shaft arranged in a vertical position. This shaft maybe placed horizontally. B is the hub fixed to and' revolving with the shaft; C, the piston radiating from the hub B and revolving with it. This piston is hollow in the center forming a steam way communicating with a steam way in the center of the shaft; D, the
grooved part of the hub. This is made of greater diameter than the part of the hub from which the piston radiates. The groove or channel F is circular of suflicient depth to form aV steam way for the escape of steam, a segment of which w extends entirely through grooved part of the hub to permit the steam to pass from the steam cylinder into said circular steam way which is on the under side of the hub E, the steam chamber in which the piston revolves. This is a circular plate reamed out forming the steam chamber the center of which being of the diameter of the grooved part of the hub and of suiicient depth to receive the same.
It is perforated in the center for the'hollow end of the shaft to pass through and near the center for the escape of the steam into the condenser which is placed over the aperture. This plate is called the bottom plate and has a circular ange perforated for screw bolts which fasten the top plate to it; Gr, top plate of the steam chamber made of the same diameter perforated in the center with a round aperture for the shaft and two oblong apertures for the valves to work through; H H, sliding or reciprocating valves. These are made rectangularV like others in use. I I valve rods attached to the valves made in thek usual manner. J J
valve chamber fixed to the outside of the steam chamber and in which the valves move made vin the usual maner, with grooves in the ends thereof for the ends of the valves to slide inV K K stuffing boxes through which the valve rods move fixed to.
the outside'of the valve chambers .L L guides of the valve rods vM M adjustable heads fixed to the valvefrods by screws so as to be raised or lowered on said rods at pleasure for accommodating the swivels to the po-sition of. the cam wheel N N the swivels attached to the adjustable heads and in which the cam wheel revolves said swivels having round stems or Shanks inserted in thea heads loosely so that they wll allow them to turn and accommodate themselves to the cam Vwheel O the cam wheel for moving the valves secured to the revolving shaft by a hub and made adjustable thereon by an adjustable screw passed through the same.
This cam wheel is circular in the plan and winding or spiral in its side elevation, for raising and lowering the valves alternately as it turns horizontally P the stuiing box of the shaft secured to the top of the valveV boxes in the center thereof. Q, a stuffing box of the sha-ft fixed to the under side of the bottom plate ofthe steam chamber. R is the condenser secured to the under side of the bottom plate of the steam chamber over the escape aperture therein. S pump for exhausting the condenser. T tube for supplying the condenser with cold water furnished with astop cock for regulating the Y supply. V aperture in the shaft for the admission of steam which is conducted from the boiler through the .tube I). N aperture in the piston communicating with the aperture /U in the shaft for conducting the steam to the chamber. This'aperture extends from the center of the shaft horizontally through the hub and through the radiating piston nearly to the outer extremity of the piston it then turns at right angles and passes out at one side thereof in the manner of the Avery steam engine. W the aperture in the hub for the discharge of the steam. This Y l l 105 aperture extends entirely through the hub nearly a quarter of the circumference of the circular Vsteam way in the hub with which it communicates and 'with the steam chamber as before described. X screw bolt, for securing the top plates of the steam chamber to the flanged rim of the bottom plate. V screw bolts for securing the plates of the CTI valve chambers to the top plate .of the steam chamber.
e is a segment groove in the hub to allow the steam to pass from one side of the valve to the other as the valve descends to equalize the pressure of the steam on both sides of it until the valve is entirely down upon the bottom of the steam chamber to prevent any impingement of the valve in the straight grooves. This segment groove is upon the top of the hub opposite the escape aperture w of sufficient depth to allow the steam to passfrom one side of the valve to the other, as the hub revolves and as this groove passes the valve the passage of the steam is cut off and a tight chamber is then formed which will cause the steam to have complete action against the piston. This segment groove may be in the side of the smaller diameter of the hub in any convenient part of the hub. The' circular steam chamber E 'in this modification is represented in a horizontal position in which the two circular plates become top and bottom plates; butV as before stated the shaft may be in a horizontal position and the chamber be vertical or placed edgewise in which modification the circular plates become end plates.
The valves are arranged on the radius of the steam chamber on oposite sides of the shaft and in a direct line. rThe piston radiates from the hub in a direct line,A arranged vertically under the highest part of the cam wheel therefore when these are in a direct line with the line of the valves the valve will be raised or be withdrawn from the chamber so as to allow the piston to pass it without obstruction. The steam is conducted to the interior of the steam chamber E through the hollow shaft A and piston c and acts against the piston at right angles and propel it around in the circular steam chamber by its elasticity, being confined by the valves H which are pushed into the steam chamber and withdrawn therefrom alternately so as to allow of the action of the steam and the escape of the same at the required periods of time to keep up the rotary motion of the shaft desired by means of the aforesaid cam wheel 0 which is adjusted on the revolving shaft to produce that result. The steam is caused to escape at every semi revolution of the hub and at the moment of withdrawal of the valve from the chamber which has the effect of reducing the friction against the sides of the valves which would be produced by the pres sure of the steam if the'steam were not let off simultaneously with the receding of the valve.
The impingement which would be produced by the pressure of the steam against the valves as they enter the steam chamber is removed by allowing the steam to pass from one side of the valve to the other along the segment groove in the upper side of the hub for equalizing the pressure of the Vsteam on both sides of the valve until the valve reaches the bottomV of the steam chamber where a perfect stop or head is produced for the action of the steam by the flat or plain part of the hub being brought under the edge of the valve. The steam begins to escape as soon as the eduction slot 1U in the hub passes the valve; the steam passes into the circular groove or channel F in the hub D, from whence it passes through the aperture a in the bottom plate of thev steam chamber into the condenser R where it is condensed. The water in the condenser, Y
which is partly heated by the steam and the condenser steam, is drawn off by the pumps to supply the boiler. This will produce a partial vacuum in the condenser which will cause the cold water to flow therein through the supply tube T which is provided with a cock for regulating the supply of cold water. It will thus be seen that from the before described construction and arrangement of the several parts of the engine that at every semi revolution of the cam wheel and shaft one of the valves will be withdrawn from the circular steam chamber andthe opposite valve pushed into it while a continual column of steam passes from the boiler into the said chamber where it acts on the piston constantly and against the valves alter.- nately and is let off alternately on opposite sides of the chamber into the steam way leading to the condenser in which there willY be formed a partial vacuum, as before stated, causing the steam to pass instantaneously from the side of the piston opposite to that on which the steam presses, which will give this engine the properties of the lowpressure engine.
What we claim as our invention and which f we desire to secure by Letters Patent is- The' revolving circular valve or hub constructed with the slot on one side, grooved or channeled on the other end an aperture passing through it, placed in a grooved or circular recess in the bottom of the cylinder
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