US777592A - Distributing-valve. - Google Patents

Description

No. 777.592. PATENTED DEC. 13, 1904. I" BURGER.

DISTRIBUTING VALVE.

APPLIOATION FILED AUG.30,1901.

N0 MODEL. I 3SHEETB-BHBET 1.

I 22'& 221 41 Wu mamas 4115mm I @551, attomm p No. 777,592. PATENTED DEC. 13, 1904. F. BURGER.

DISTRIBUTING VALVE.

APPLICATION FILED AUG. an. 1901.

N0 MODBL- 3SHEETS-SHEET 2.

/ I I j g 21 I a 5 J I l 34 3 l7 Z 15 g 18 I w 33 i 5 Z 1 it I w PATENTED DEC. 18, 1904.

F. BURGER.

DISTRIBUTING VALVE.

APPLICATION FILED AUG 30. 1901.

3 SHEETS-SHEET 8,

N0 MODEL;

5n uantoz IIIH .mlmmlm n 1 7 operation of the engine.

Nrrnp STATES Patented December 13, 1904.

PATENT OFFICE.

FRANZ BURGER, OF FORT \VAYNE, INDIANA, .ASSIGNOR OF THREE- FOURTH S TU HENRY M. WILLIAMS, OF FORT AYNE, lNDlANA.

DISTRIBUTING-VALVE.

SPECIFICATION forming part of Letters Patent N 0. 777,592, dated December 13, 1904. Application filed August 30, 1901. Serial No. 73,839. (No model.)

To It whom it may col merit.-

Be it known that I, FRANZ Bone an, a citizen of the United States, residing at Fort \Vayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Distributing-Valves, of which the following is a specification.

My invention relates to engine-valves; and its object is to overcome some of the objectionable features of the slide-valve or pistonvalve by reducing friction, while at the same time increasing the steam-fit of the parts.

My invention consists of a valve for an engine operating with steam or other motive fluid; and my invention further consists of inlet and exhaust valves of novel construction provided with auxiliary balancing valves which control the operation of the inlet and exhaust valves, while each valve is independently operated and the inlet-valves are also operated independently of the exhaust-valves.

My invention is hereinafter more fully set forth in its many details of construction and operation in the accompanying specification and drawings, in which- Figure 1 is a side elevation in section of. an engine-cylinder and valve-chest, showing my improved construction of valves. Fig. 2 is a transverse section of a cylinder and valvechest on the line A B in Fig. 1. Fig. 3 is a plan view, partly in section, of the cylinder and valve-chest.

Referring to the drawings, 1 represents the cylinder of an engine operating by means of steam or other motive fluid and having a suitable piston 2 and piston-rod 3. i

1 represents the valve-chest suitably arranged with reference to the cylinder for the As shown in Fig. 2, the steam or motive fluid enters the valvechest by the passage 11, while its entrance to the engine-cyliiuler l is controlled by suitable passages and valves hereinafter to be described, the motive fluid. taking the direction of the arrows in the various drawings. The exhaust connects with the spaces and 16 in the valve-chest, the exhaust taking the direction of the arrows as shown in the drawings.

\Vhile my. invention may be carried out by means of various kinds of valves, l have shown it in connection with pumiet-valves, in this instance 7 and 8 representing the inlet-valves, while and 41 represent the exhaust-valves. Arranged within the valve-chest is a central steam-chamber 12, with which the inlet-passage 11 connects, as shown in Fig. 2, and to either side of the chamber 12 are shown inletports 9 and 10, provided with suitable valveseats 22, shown in this instance as having tapering seats. against which the puppet-valves make a tight lit.

My improved inlet-valves consist, essentially, of hollow portions or shells 22, sliding within the valve-chest and guided therein by suitable ribs 17 which tend to keep the valves in a central position, but allow the motive fluid to pass around the valves to the ports. Within each shell, which may be of metal, is placed a guide-piece 27, connected to the shell and shown in this instance as having an extension 27 of smaller cross-section than the.

main portion, while the main portion is provided with perforations 28 and an aperture 39, the functions of which are hereinafter to be referred to. Suitable valve-seats 23, shown tapering, are provided on the shells 22, within which are adapted to seat auxiliary contr0lling-valves 24:, the stems 25 of which are shown as passing through and guided. by the smaller guide portions 27 and the guidepieces 27. As will be seen, the guide-pieces 27 form perforated caps about the auxiliary controlling-valve 24, and springs 38 are suitably arranged, tending to press the auxiliary valves against the main valves, and suitable means, as springs 37, are shown tending to seat the main valves against the seats 22 in the inlet-ports. These springs 37 are conveniently arranged surrounding the guide-pieces 27 and abutting against shoulders in the valvechest at theirinner ends, while exerting pressure upon the shells 22.

As shown in the drawings, those inlet-valves on the right, Figs. 1 and 3, are shown closed, while those on the left are shown open, and it will be seen that the arrangement of shells 22, guide-pieces 27,and auxiliary valves and stems 25 is such that by actuating the valve-stem 25, causing it to slide within its guidepiece, the shells 22 are operated to open and close the ports 9 and 10. The shells are withdrawn from the valve-seats against spring-pressure by a pull on the valve-stem 25, the release of which will allow the shells 22 to seat against their valve-seats under springpressure. In this operation of the valves the auxiliary controlling-valves open the ports 9' 10 in the shells 22 before the inlet-valve itself is opened, and it is obvious that the shells 22' seat against the valve-seats 22 before the ports 9 10 are closed by the auxiliary valves.

The perforations 28 are partly closed by the auxiliary valves 24 when an inlet-valve is closed, as in the position of the valve shown at the right in Figs. 1 and 2, and when an inlet-valve is opened the motive fluid immediately passes through the perforations 28 to the other. side of the valve, producing a counteracting pressure, tending to balance the original pressure, and thus allow the inletvalve to be readily opened without great expenditure of force. Continuing to open an inlet valve, the auxiliary valves 24 pass beyond the perforations 28, entering the annular space 29 in the guide-piece, while at the same time a cushion of steam, if steam is the motive fluid, is produced behind the auxiliary valves 24, which prevents the head of the valve from making violent contact with the guidepiece. The spring 38 is to facilitate the closing of the auxiliary controlling-valve, while the openings 39 are to counterbalance pressure against the auxiliary valve, their function coming into play when the inlet-valves are to be closed.

Suitable means are provided for actuating the inlet-valves and for operating them independently of each other, in this instance a rock-shaft 18 being shown, passing transversely through the steam-chamber 12 in the valve-chest and through suitable lugs thereof, whereby a steam-fit may be made between the walls of the valve-chest and the rock-shaft, a screw-plug 32 being shown at one end of the rock-shaft to insure the joint being steamtight. The lever 19 is connected to the rockshaft 18, which lever is shown provided with a roller 33 engaging the slotted ends of the valve-stems 25. One of these slotted ends is preferably shown forked (best seen in Fig. 3) and straddles the end of the other valvestem, so that the slotted ends may slide longitudinally relatively to each other. Means are provided, as a rod 21, which may be connected to the eccentric and also to an arm on the rock-shaft 18 for rocking the shaft and the lever or arm 19, thereby causing the roller 33 to engage the end of one or the other of the slotted portions 34 of the valve-stem 25, and thereby pulling the auxiliary valve 24 against the main portion of the inlet-valve to open the said valve against the pressure of spring 37 While one valve, therefore, as 9, is being opened, the other one, 10, is being closed under the pressure of its spring 37, and this alternate action will be kept up by the operation of the rock-shaft, the arrangement of the parts being such that there is sufficient play between the roller 33 and slotted portions 34 of the valve-stem to allow an auxiliary valve 24 to seat under the action of its spring 38 after the inlet-valves have been closed.

Substantially the same arrangement of main and auxiliary controlling-valves is shown in connection with the exhaust-ports as have been described in connection with the inletports, the exhaust-ports 13 14 being shown in this instance at the ends of the valve-chest and formed with suitable tapering valve-seats 16, the exhaust-valves 40 41 opening inwardl y from the exhaust-ports. The exhaustvalvcs 4O 41 are shown comprising suitable disks connected by arms 40 to a hollow valvestem 43, within which hollow valve-stem is arranged the valve-stem of an auxiliary valve 45, adapted to close a port 42, with a suitable valve-seat in the valve 40, after the valve 40 is seated within the exhaust-port, and the valve is further adapted to open the port in the valve 40 before such valve leaves the valve seat in the exhaust port. Suitable means for accomplishing this purpose are provided, as shown, consisting of rock-shafts 48, having arms 49, two of which arms are suitably connected by a rod 51, while the remaining two are adapted to actuate the exhaustvalves, with their controlling-valves, by first moving into engagement with the inner valvestem 44 of the controlling-valve 45, assuming such exhaustvalve to be closed, as shown at the left in Fig. 1, for instance, and having forced the auxiliary controlling-valve 45 away from its seat in the exhaust-valve 41 the arm 49 will continue its movement and abutting against the hollow valve-stem 43 of the exhaust-valve 40 will finally force the exhaustvalve from its seat. The operation of the inlet and exhaust valves is so timed as to control the flow of motive fluid to the cylinder of the engine for the operation thereof. A suitable connection 52 is also made with the eccentric or other suitable movable part of the engine and the connecting-rod 51 and rocksliafts 49.

It will thus be seen that I have in combination with the valve-chest of an engine suitable valves, which may be puppet-valves, controlling the flow of motive fluid to the engine, and auxiliary valves controlling the operation of said motor-fluid-controlling valves. I have also provided independent means for operating each of said valves, while the exhaust-valves are operated independent of the inlet-valves. I have also provided an improved valve seat for my valves, as shown, the valve-seats for the inlet and exhaust valves being formed removable from the valve-chest. The valve-seats for the exhaust-valves are preferably formed integral with the head of the valve-chest, while the valve-seats 22 of the inlet-valves are suitably connected by connections 53 with valve -seats of the exhaustvalves, so that by removing an end of the valve-chest the valve-seats for the inlet and exhaust valves may be removed therewith for cleaning and repairs.

Without limiting myself to the precise construction and arrangement of parts herein shown and described, I claim as my inventi0n- 1. The combination with the valve-chest of an engine, of inlet-valves therein. exhaustvalves, means for operating the exhaustvalves. and operative means between the inlet-valves within the valve-chest whereby said valves are adapted to be independently operated, substantially as described.

2. The combination with the valve-chest of an engine and its ports, of removable valveseats for said ports supported by the covers 01' the valve-chest, substantially as described.

3. The combination with the valve-chest of an engine, of inlet-valves therefor consisting of shells provided with perforated guidepieces, and auxiliary balancingvalves mounted withi u said guide-pieces and adapted to close after but open before said inlet-valves close and open whereby a cushioning efi'ect in the guidepieces is obtained for the auxiliary valves when the inlet-valves are open, substantially as described.

In testimony whereof] have signed my name to this specification in the presence of two subscribing witnesses.

FRANZ BURGER. Witnesses:

G100. B. CRANE, ORRA ERVIN.

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