US628953A - Steam-engine. - Google Patents

Description

No. 628,953. Patented July l8, I899. E. MOCDNVILLE.

STEAM ENGINE.

(Application filed Dec. 1, 1898.]

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STEAM ENGINE ion filed Dec. 1, 189 8.)

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#vinesses Nrrnn STATES PATENT @FFICE.

EMMET" MCCONVILLE, OF PITTSBURG, PENNSYLVANIA;

STEAM-ENGINE;

srncrrrcArron forming part of Letters Patent No. 628,953, dated m 18, 189d.

Application filed December 1, 1898. Serial No. 697,983. (No model.)

To all whom it may concern:

Be it known that I, EMME'rr MoOonviLLn,

a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Steam-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 invention has reference to improvements in steam-engines whereby much saving of steam and increased horse-power are gained, and which consists of certain novel features of construction, which will be here inafter fully described in the specification and pointed out in the claims.

The object of my invention is to so construct a steam-engine that a reciprocating cylinder which moves in an opposite direction to the within'contained piston upon ways or guides will have the friction upon said moving cylinder reduced to a minimum through the medium of friction-rollers properly arranged between the moving cylinder and its supportingguides.

A further object of my invention is to so construct the connecting-rod with springs or any other yielding devices that all undue shocks will be eliminated from the wrist-pin when the engine is changing its position from forward to backward stroke or the opposite.

A further object of my invention is to connect a rocking lever upon a moving cross-head, with its opposite ends attached, respectively, to an eccentric-rod and a valve-rod.

A further object of my invention is to pro vide a pair of cross-heads, one connected direct to a piston and connecting rod and having openings for allowing reach-bars for-connecting to the cylinder-head, the opposite ends being secured to a yoke cross-head adjacent to two connecting rods.

A further object of my invention is to provide parallel jointed steam connections whereby a movable cylinder can reciprocate and allow said jointed rods to accommodate them selves to the moving cylinder.

It is obvious to those conversant with steamengines that this class has advantages not possessed by stationarycylinder engines. The cylinder moving opposite to the piston In theldrawings, Figure lis a side eleva tion of my improved engine. Fig. 2 isa plan of the same. Fig. 3is a plan indetail of the cross-heads and cylinder-heads, parts being broken away and partly in section, exhibitin g the construction and relative position of the three connecting-rods. Fig. 4 is a front elevation of the yoke cross-head with the valve-rod lever pivoted thereon and the reach- I bars and connectingrods secured thereto. Fig. 5 is a front elevation of the piston-rod cross-head. Fig. 6 is a transverse vertical section of the steam-cylinder and valve--cham ber secured to its accompanying guides or ways by friction-rollers. Fig. 7 is a detail, partly in section, of a connecting-rod head, exhibiting the means for arranging the spring devices. Fig. 8 is a detail in section of the relative position the guides or ways assume toward the cylinder, with the friction-rollers removed to exhibit more fully the bearingsurfaces for the friction-rolls. Fig. 9 is a modification of the friction-rolls and their bearings in the guides and cylinder.

The en gine consists of a bed A, having ordinary boxes for a shaft B and which are integral with three cranksviz., two side cranks b b and a central crank b. The side cranks I) carry connecting-rods G O. The opposite ends of said connecting-rods O are secured to a yoke cross-head D by means of pivotal pins cl (2, respectively. Also secured to said yoke cross-head D by pins 61 are reach-bars E E, their opposite ends beingsecured by pins e e through earsff, the latter being integral with the front cylinder-head F of the steam-cylinder F. The central crank 19, previously re- .ferred to, carries a much heavier connectingrod 0 and which is secured at its opposite end to a cross-head G. Said cross-head supports the piston-rod H, which makes direct connection with the steam-cylinder through the medium of a piston. Gross-head G has two rectangular openings 9 g for allowing the reach-bars E to pass through freely, but not contacting said openings g.

The mainconnecting-rod 0', previously reeccentric-rod L at its lower end ferred to, not only receives all the load that comes upon its crank, but it also must operate the side cranks b for moving the reciprocating cylinder F, and to provide for sudden shocks outside of cushioning by the steam, which may, or may not operate, I provide an effective means through the medium of two opposing springs I, (see Fig. 7,) which will be hereinafter more fully set forth.

Secured to the yoke cross-head by means of a wrist-pin 7c is a lever K, fulcrumed near its lower end and adapted to connect with an and at its upper end to a valve-rod M.

Secured to the bed A by bolts a are ways or 7 guides N, having an external Vshaped contour a for the reception of friction-rollers P. The ways F upon the cylinder F are internally V-shaped in their contour and make connection with Ways N through the medium of friction-rollers P, previously referred to. (See Fig. 6.) To-p'revent any slight movement of the steam-cylinder and to keep it in aline ment, I provide an annular rib p centrally located on each friction-roller, and I also provide-longitudinal grooves f in the V-bearings n and F respectively, for said ribs to move By this means the cylinder is in perfect alinement both laterally and vertically.

The friction-rollers P are provided with oilholes 10 and also covers q, the latter for pre venting dust from entering among the rollers.

The springs I, previously referred to, play against the opposite ends of a bisected box R. Said box is secured in the head of the connecting-rod by side flanges 4'. (Shown in dotted lines in Fig. 7.) Boxes Rare recessed for holding said springs. Projections s extend partly into said recesses to more fully operate as bearing-surfaces for springs I to rest against.

Fig. 9 is a modification of the friction-rollers, which are well adapted for heavy reciprocating cylinders. The reciprocating cylinder is connected to jointed steam connections 25, which oscillate in harmony with the reciprocating steam-cylinder and furnish steam and exhaust similar to a stationary cylinder.

Having described my invention, that which I desire to secure by Letters Patent'of the United States is-'- v r 1. I11 combination with a reciprocating steam-cylinder moving on ways or guides, friction-rollers interposed between said cylin= der and guides, longitudinal grooves in projections integral with said cylinder, also similar grooves in the ways or guides secured to the engine-bed, said guides being adapted to receive friction-rolls which are provided with annular ribs for entering said longitudinal grooves in the cylinder and Ways, for the purpose as shown and described.

2. In combination with a reciprocating en'- gine mounted on ways secured to an engine bed and operated by two reach-rods and three connecting-rods and two cross-heads, of an eccentric and valve rod connection through the medium of a lever pivoted to a movable yoke cross-head, as specified.

3. In combination with a steam-engine, a connecting-rod provided with a bisected box, and an enlarged head surrounding said box, springs at opposite ends or sides of said box located in recesses formed in the same, and projections integral with the connecting-rod and extending into said recesses against said springs, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

EMMET' MCCONVILLE.

\Vitnesses: W. REEs EDELEN,

D. McOoNvILLE.

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