US513830A - District of - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

S. SGOGNAMILLO- STEAM-ENGINE.

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(No Model.) 3 Sheets-Sheet 2.

s. SGOGNAMILLO.

STEAM ENGINE.

No. 513,830. Patented Jan. 30, 1894.

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(No Model.)

ASTEAM ENGINE.

No. 513,830. Patented Jan. 30, 1894.

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UNITED STATES PATENT muon.

SALVATORE SOOGNAMILLO, OF RICHMOND, VIRGINIA, ASSIGNOR OF ONE-HALF TO ALFONSO AMOROSO, YOF WASHINGTON, DISTRICT OF coLMBIA.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Iatent No. 513,830, dated January 30, 1894.

Application le. August 3, 1893.' Serial No. 482,295. (No model.)

To all whom it may concern: Y

Be it known that I, SALVATORE SooGNA- ivIILLO, a subject of the King of Italy, residing at Richmond, in the county of Henrico and State of Virginia, have invented new and useful Improvements in Steam-Engines, of which the following is a specification.

This invention relates to a class of steam engines in which several groups of pistons are connected with a cranked engine shaft, and the invention consists in the features of construction and novel combinations of parts as hereinafter particularly set forth. In the annexed drawings illustrating the lnvention-Figure 1, is a vertical longitudinal section of my improved steam engine. Flg. 2, is a plan of the engine with upper cylinder-casing heads and steam chests removed. Fig. 3 is a plan of the upper casing head, steam chests, valves and eccentric valve gear, with cap removed. Fig. 4 is a vertical transverse section on the line 4-4 of Fig. 1. Fig. 5 is a horizontal section on the line 5-5 of Fig. 1. Fig. 6 is a plan of the inner side of one of the caps forming part of steam chests and exhaust chamber.

Referring to the drawings the numeral 1 designates a framework supporti-ng two cylinder-casings2 in each of which are arranged three stationary open ended cylinders 3, as shown in Fig. 2. The cylinder-casings 2 are closed at each end, or at top and bottom, by plates 4 and 5 that are extended across and between the cylinder casings 2, as shown in Fig. 1. On the outer sides of the plates 4 and 5 are valve seats 6 eachof which has three ports 7 that communicate respectively with the ends of the three several engine cylinders 3 inclosed by each of the cylinder-casings. To the outer surfaces of the plates 4 and 5 are secured suitably chambered cap pieces S and 9, which are respectively so arranged as to form, with the plates 4 and 5 and valve seats 6, a steam chest or steam inlet chamber 10 at both ends of ea'ch cylinder-casing 2 and an intermediate exhaust chamberll between the steam chests at opposite ends of the cylindercasings. v

Each set of cylinder ports 7 is controlled by a slide valve 12, Figs. 1 and 3, pivotally attached to one end of a link 13 the other end of which has a pivotal or jointed connection With the strap 14 of an eccentric 15 mounted ,on a shaft 16 that is rotated from the main ,engine shaft, as presently explained. It will be understood that there are four precisely similar slide valves 12, one at each end of the two cylinder-casings, and that on the shaft 16 are four' eccentrics 15, two being arranged in each exhaust chamber 11 and each provided with an eccentric strap 14 connected with a slide valve. The several eccentrics l5 are set on the shaft 16 in such relative positions that as the said shaft is rotated the respective slide valves will be operated in such manner as to simultaneously admit steam into alternately opposite ends of the two sets of engine cylinders 3 and exhaust at alternately opposite ends.

The steam chests 10 are provided with inlets 17 Fig. 6 from a steam pipe or pipes 18 leading from a main supply pipe 19, Fig. 1, and each exhaust chamber 11 is provided with an outlet to an exhaust pipe 20, Fig. 6, the said steam inlet and exhaust pipes being arranged in any suitable or convenient manner.

.The inner side of each slide valve 12 is provided with suitable grooves or passages 21, shown by dotted lines in Fig. 3, to permit exhaust from the engine cylinders 3 to the exhaust chambers 11 when the grooves or passages in said valves are in communication with the cylinder ports.

In each engine cylinder 3 is a piston head 22 attached to a piston rod 23 projecting through suitable packed openings or stuffing boxes provided in the plate 5 or lower head of the cylinder casings. V

To each set or group of three piston rods is secured a cross-head 24 having guide arms 25 that are arranged to reciprocate in guideways 26, Figs. 1 and 5, formed in the bars or standards 1 that constitute the frame of the engine. The cross heads 24 are connected by pitmen 27 to cranks 28 set quartering or at angles of .ninety degrees to each other, on a main engine shaft 29, supported in suitable bearings.

The manner of gearing the main engine shaft 29 with the valve shaft 16 is clearly shown in Figs. 1 and 4, which also illustrate IOO the mechanism for reversing the valves. 'The valve shaft 16 is provided with bearings in the plates 4 and 5 and in a housing 30 that receives a bevel gear 3l secured to one end of said valve shaft in position to mesh with a bevel gear 32 on the main engine shaft.

In order to provide for reversing the valves the shaft 16 is made longitudinally movable and has secured to it a worin wheel 33 which, by moving said shaft longitudinally in the proper direction, may be made to engage with a worm 34 on a transverse shaft 35 provided with a hand wheel 36 through which the position of the valves may be reversed.

To a suitable support 37 is fulcrumed a foot lever 38 having one end engaged with a collar 39 that surrounds the valve shaft 16 immediately below the worm wheel 33 in position to bear thereon and lift the shaft sufficiently to bring said worm wheel into engagement with the worm 34 when the outer end of the lever 33 is depressed. On depressing the lever 38 to raise the worm wheel 33 into engagement with the worm 34 the bevel gears 3l and 32, connecting the shaft 16 with the main engine shaft, will be disengaged. By now turning the hand wheel 36 the valves may be reversed or adjusted as desired.

Any suitable fastening may be provided, as indicated by dotted lines in Fig. 4 to hold the lever 38 in a depressed position.

For the purpose ofpermitting the required longitudinal adjustment of the shaft 16, preparatory to reversing the valves, the eccentrios 15 are loosely placed on a squared portion 16 of the shaft 16, the upper eccentrics being preferably attached to an internally squared sleeve 16b removably placed on the upper portion of the squared shaft section 16 so as to permit removal of the upper plate 4, to give access to the cylinders and cylindercasings, without disturbing the eccentrics and the connected valves.

The cylinder ports 7 are so arranged as to deliver steam directly in line with the several pistons. By arranging a group of engine cylinders and pistons in each of two or more cylinder-casings and connecting the several groups of piston rods with the main engine shaft in the manner shown and described economy of space and compactness of structure are combined with increased capacity for development of power; strains are equalized so as to reduce the liability to a breakdown, and in the event of any cylinder or piston becoming disabled the engine can still be run elfectively with the others.

If desired the main engineshaft 29 may be connected by gearing 40 with two parallel shafts 41 and 42 for driving twin propellers or for other purposes.

What I claim as my invention is 1. The combination with a cranked engine shaft, of a group of open ended engine cylinders inclosed in a cylinder-casing and provided with pistons, a cross-head connecting the several piston rods of a group of pistons,

a pitman connecting said cross-head with a crank on the engine shaft, steam chests at both ends of the cylinder-casing and provided with ports in the ends of the engine cylinders, and slide valves for controlling said ports, substantially as described.

2. The combination with an engine shaft having a series of quartering cranks, o f separate groups of open ended engine cylinders provided with pistons, a cross-head connectin g the several piston rods in each group, pitmen connecting the cross heads with the cranks of the engine shaft, cylinder-casings that inclose the separate groups of engine cylinders, steam chests at both ends of the cylinder-casings, each of said steam chests being provided with ports, slide valves for controlling said ports, exhaust chambers between the steam chests at both ends of the cylindercasings eccentrics located in said exhaust chambers and provided with straps having link connections with the slide valves, and a shaft connected with the eccentrics and actuated from the engine shaft, substantially as described.

3. The combination of a cranked engine shaft, engine-cylinders arranged in separate groups each comprising three open ended cylinders provided with pistons, cross-heads connecting the piston rods in each group, said cross heads provided with guide arms, a frame having guide ways for the guide-arms of the cross-heads, pitmen connecting said cross-heads with the cranks on the engine shaft, cylinder-casings iuclosing the separate groups of engine-cylinders, steam chests at both ends of the cylinder-castings, each provided with valve seats having ports communicating with the engine-cylinders, and slide valves for controlling said ports, substantially as described.

4. The combination of a cranked engine shaft, separate groups of open ended enginecylinders provided with pistons, cross-heads connecting the piston rods in each group, pitmen that connect said cross-heads with cranks on the engine shaft, cylinder-casings inclosing the separate groups of engine cylinders, steam chests and intermediate exhaust chambers at both ends of the cylindercasings, slide valves located in the steam chests, eccentrics located in the exhaust chainbers and connected with the slide valves for operating them to admit steam into alternately opposite ends of the cylinders and to simultaneously exhaust at alternately opposite ends, and reversing mechanism. for shifting `the eccentrics, substantially as described.

5. The combination of a cranked engine shaft, cylinder-casings each inclosinga separate group of open ended engine cylinders having pistons connected with the cranked engine shaft, steam chests and intermediate exhaust chambers at both ends of the cylinder-casings, slide valves located in the steam chests, eccentrics located in the exhaust chambers and connected with the slide valves to and cause it togear with the worm shaft for reversing the engine, substantially as described.

In testimony whereof I have hereunto set 15 my hand in presence of two subscribing Witnesses.

SALVATORE SCOGNAMILLO.

Witnesses:

ALBERT H. NoRRIs, ANGELO AMASSINO.

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