US1103087A - Valve mechanism for motors. - Google Patents

Description

A. F. SCHMIDT.

VALVE MECHANISM FOR MOTORS. APPLICATION FILED MAR.13, 1912.

1,103,087. Patpnted July 14,19M

3 slums-31mm 1.

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A. F. SCHMIDT.

VALVE MECHANISM FOR MOTORS.

APPLIGATION FILED MAR.13, 1912.

1,103,087. Patented July 14,1 14.

3 SHEETS-SHEBT 2.

VIVITNESSES.75 I fl. Max:177 Jowf ml CL.

A. F. SCHMIDT.

VALVE MECHANISM FOR MOTORS.

' APPLICATION FILED MAR. 13, 1912.

Patented July 14, 1914,

3 BEEETS-SHEET 3.

WITNESSES.

; UNITED STA ES PATENT. OFFICE;

- AUGUSTUS F. SCHMIDT, OF PITTSBURGH, PENNSYLVANIA.

4 of Pittsburgh, in the county VALVE MECHANISM FOR MOTORS.

Patented July 14., 1914..

Specificationof Letters Patent.

Application filed March 13, 1912. Serial No. 683,643.

To all whom it may concern:

Be it known that I, AUGUSTUS F. SCHMIDT, a citizen of the United States, and resident of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Valve Mechanism for Motors; and I do hereby declare the following to be a full, clear, and

exact description thereof.

My invention relates to rotary mechanism for motors.

The main object of my invention is to provide rotary valve mechanism in WhlCh there is a quick opening and closing of the ports while at the same time a comparatively valve slow motion is imparted to the rotating parts.

Another object of my 1nvent1on is to provide for the cooling of a rotary valve sleeve on the inside as well as outside.

To these ends my invention comprises the novel features hereinafter set forth and claimed.

In the accompanying drawings Figure 1 is a longitudinal section'taken through the exhaust valve, the remaining parts of the motor being shown in full lines. Fig. 2 is an end elevation. Fig. 3 is a vertical section through the cylinder and cross-section through valves. Fig. 4 is a view of one of the valves partly broken away. Fig. 5 is across-section of one of the valves; Fig. 6 is a detail showing the end bearing for the rotary sleeves; and Fig. 7 shows a modified form ofmy invention.

In Figs. 1, 2 and 3 of the drawings, I

i have ,illustratedmy invention in connection i to the crank-shaft bv'the cranks 5- and 6,

The upper ends of the piston-rods are connected to the pistons 7 and 8 contained Within the cylinders 9 and 10, respectively. The cylinders may all be cast in one piece if desired and this casting'is formed with the T-head 11 with the bores 12 at each side of the cylinders. These bores 12 are surrounded b the outside water-jackets 13 and on the lnside by the water-jackets 14. The

' cylinders are provided with the intake ports 1 5 and the ex aust ports 16.

I will first describe the rotary-sleeve.mech-- anism for controlling the supply of gaseous directions.

fluid to the cylinder, and this is. the valve mechanism on the left-hand'side' of the cyl inder as shown in Figs. 2 and 3. The mech- Y anism, however, for the exhaust side is iden-' tical. Within the bore 12 is the inner rotary valve 17 which consists of a hollow sleeve surrounding the inner concentric core-piece 18 provided with the water jacket 14 connecting with water-jacket 13 by means of cap 19. This hollow valve sleeve 17 is provided with ports 20 arranged apart, the ports leading to one cylinder being staggered with reference to those leading to the other cylinder, as shown in Fig. 4. The outer rotary valve sleeve 21 fits around the inner sleeve 17. Each of'the sleeves 17 and 21 have the annular grooves 22 at their inner ends to'receive the, balls 23 carried by the annular ball-race 24 which' is contained within the bore 12, and is held therein by the annular retainer 25 formed as part of the head 19 which is secured to the casting forming the water-jacket, the same as shown at Fig. 4 in connection with the exhaust valve. The core-piece 18 has the ports 27 and 28. The port 27 is the port through which.

the explosive fluid passes to the cylinder.- A pipe 29 is connected up to the core-piece 18 said pipe leading from a suitable carburetor.

The outer end of the valve sleeve 17 has the threaded seat 30 in which-the stud 31 is secured. A work-wheel 32 is keyedto the stud 31 and is held in place by the nut 33. The worm-wheel 32 has formed therein the bevel pinion 34. The bevel pinion 34 meshes with the bevel pinion 35 on the stud-shaft 36 journaled in the casing. This pinion 35 'meshes wit-lithe internal bevel gear 37 which is secured to the outersleeve 21 by the screws 38. I

A worm 39 is carried by the vertical shaft 40 and said worm meshes with the worm wheel 32.- The shaft'40 is provided 'at its lower end with the bevel pinion 41 which loo is engaged by the bevel pinion 42 on the crank-shaft 3. The gear connections be tween the crank-shaft 3 and the inner and outer valve sleeves" are so adjusted that the valve sleeves will make a quarter revolution to each revolution of the crank-shaft.

Furthermore it is apparent from the above I described gearing that the rotary valve sleeves 17 and 21 will be'driven in opposite The abovemechanism is shown in connection' with the exhaust'valvel Fig.

' 1, but this construction applies equally well to the inlet valve. Theouter valve sleeve" 21 is also provided with orts 43 whlch correspond to the ports 200 the inner valve sleeve and said ports are adapted to register at the intake port as indicated in. Fig. 3 or upon each quarter of said valve.

- Itwill be unnecessary to describein detail'the valve mechanism controlling the exhaust 16, as it is-a duplicateof that described in connection with the valve controlling the intake, and the same reference numerals areemployed on like parts, such as 17 18, 20 etc. The same worm 39 opcrates both valves, the only point of differencebeing that the rotary sleeves of the ex- ,haust valves are set so as to open the exhaust port when the intake is closed as indicated in Fig. 3; The exhaust side has the pipe 47' connected'up thereto for carrying ofl-the exhaust gases; The valve casings are passages 44:, 44 When it is desired {28 into-the intake port 15. The exhaust side h'as the port 48in the core-piece 18 which 49 leading'from the cylinder, so that when the piston passes below the port 48 the is brought into'connection with the by-pass exhaust can beginto'take place before the I cylinder casting.-

piston begins toascend. A cooling-jacket 50 is provided for the by-pass'et9 in the From the above it will be apparent that the valves controlling'the intake will make broughtinto coincidence on the a quarter revolution to each revolution of the crank shaft, and as said valve sleeves rotate in opposite directions, they will be quarter, and this will occur at the intake valve 15 where H the gaseous fluid is delivered to the upper end of the cylinder. It is apparent that by :having the valves rotating in opposite directions the full opening of the ports will take place quicker than where a single plug valve is employed, and furthermore there also will be a quicker closing of the ports.- ..This also permits the valves to have their .ports open the full width for a longer 1 period.

In Fig. 7-1 have shown another modified form of my invention in which the cylinder .is provided with the valve casings 71 at I each side thereof and at one side is the valve .mechanism controlling the inlet port 72 and at, the other side is the valve mechanism controlling the exhaust 73. In this construction only one rotary sleeve 74 is employed provided with ports 75. The central 1 core-piece @5 fluid is admitted to the central chamber 77 76 is stationary and the gaseous 7 8 is brought into register with theports by the rotation of the valve sleeve 74 so that at the time of the admission of the charge limit it to this particular type as it maybe applied to steam-engines as well.

What Iclaim is:

1. The combination of a cylinder, a'casing, an inner rotary valve sleeve in said casing, an outer rotary valve sleeve in said casing, a stationary core-piece within said inner sleeve, said stationary core-piece having a passage therein, said sleeves having ports and means for rotating; said sleeves inopposite' directions whereby the ports in said sleeves are adapted to register with a port in said cylinder'and with a port in said core leading to said passage to form communication between said cylinder and said passage. I

2. The combination of a cylinder, a casing, a rotary valve sleeve in said casing, a core within said sleeve having a passage therein and a port in communication therewith, means for admitting gas to said passage, means for cooling said core piece, said sleeve having a, port adapted to register with a port leading to said cylinderand with the port in said core piece, and means for rotating'said sleeve. 3

3. The combination of a cylinder, a i? ing, a rotary valve sleeve in said casing having ports adapted to register. with a port in said cylinder, a stationary core-plece withv v .in said rotary sleeve having an exhaust passage, said exhaust passage communicating with said cylinder when said ports are in register, said core-piece having'a 'port communicating with said passage, and said cylinder having a port at the lower end communicating with said passage.

4. The combination of a cylinder,'a piston, piston rod, crank shaft, an inner rotary valve sleeve having ports, a worm wheel connected to said valve sleeve, an outer rotary valve sleeve having ports adapted to coincide with the ports of said first mentioned sleeve, connections between said worm wheel 'and said outer rotary sleeve, and between said inner rotary sleeve and said wormwheel to rotate said inner sleeve in an opposite direction, a worm engaging said worm wheel, a vertical shaft on which said worm 1s mounted, and connectlons beg tween said vertical shaft and crank shaft. whence itv escapes by the port 7 8. This -port 5. The combination of a cylinder, a pisv a vertical shaft supporting a piston rod, crank shaft, an inner rotary valve sleeve having ports, a worm wheel connected to said valve sleeve, bevel gearing on said Worm Wheel, a bevel pinion engaged by said gear, an outer rotary valve sleeve having ports, a bevel pinion carried thereby engaged by said intermediate bevel pinion, a worm engaging said worm wheel,

said shaft, conshaft and said ton,

nections between said crank vertical shaft.

6. The combination of a cylinder having a port, an outer valve casing an inner valve casing, rotary valve sleeves between said casings having ports, means for rotating said valve sleeves in opposite directions, said outer casing having a passage coinciding with a passage in said inner casing in line with the port leading into said cylinder and a cover plate on said outer casing closing said passage.

7. The combination of a cylinder, a casing, an inner rotary valve sleeve in said casing, an outer rotary valve sleeve in said casing, a stationary core Within said inner Copies of this patent may be obtained for five cents each, by addressing the sleeve having a passage therein and a port in communication therewith, means for cooling said core-piece, said sleeves having ports adapted to register with a port leading to said cylinder and with the port in said corepiece, and means for rotating said sleeves in opposite directions. 7

8. The combination of a cylinder, a casing, an inner rotary valve sleeve insaid casing, an outer rotary valve sleeve in said casing, a stationary core-piece having a passage therein and a port in communication therewith, said core-piece having a cooling chamber, said sleeves having ports adapted to register with a port leading to said cylinder and With the port in said core-piece, and means for rotating said sleeves in opposite directions.

In testimony whereof, I, the said Aneus'rus F. SCHMIDT, have hereunto set my hand.

AUGUSTUS F. SCHMIDT' Witnesses:

ROBERT 0. Torrent, J OHN F. WILL.

Commissioner of Patents.

Washington, D. 0.

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