US547814A - Valve for steam-engines - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. E. P. SPAULDINGJ VALVE FOR STEAM ENGINES. NO. 547,814. Patented @011. 15, 1895.

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B F SPAULDING v VALVE-FOR STEAM ENGINES. No. 547,814.

Patented Oct. 15,1895.

'- INVENTOH WITNESSES:

' NITEDY STATES- PATENT Fries.

ELIJAI-I F. SP AULDING, OF BOUND BROOK, NEW JERSEY.

VALVE FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 547,814, dated October 15, 1895.

Application filed August 17, 1894.

To all whom it may concern:

Be it known that I, ELIJAH F. SPAULDING, a citizen of the United States, and a resident of Bound Brook, in the county of Somerset and State of New Jersey, have invented certain new and useful Improvements in Valves for Steam-Engines, of which the following is a specification.

The invention relates to improvements in valves for steam-engines and pertains particularly to the valves located within the steam-chest. In accordance with my invention I provide within the steam'chest a slidevalve which has a uniform reciprocation, and within this valve is located an inner or cutoff valve which has no reciprocation from or toward its seat, but simply at the proper time an axial rotation against its seat, the time of the motion of the cut-0E valve being variable and under the control of the governing devices. The form and construction of both the slide-valve and the cut-off valve are new and constitute a part of the present invention, which in its broader scope is not limited to details of construction, but without regard to form and details comprisesa reciprocating slide-valve within the steamchest and having a uniform reciprocation and a cut-oft valve within the slide-valve and having an axial oscillatory motion which is variable, the two valves receiving their motions from one rod operated by the valvegear.

The invention will be more .readily understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, forming a part of this application, and in which- Figure 1 is a central horizontal longitudinal section through the cylinder and valvechest of an engine, the valves Within the chest being constructed in accordance with and embodying the invention. Fig. 2 is a side elevation of same, the outer face of the valve-chest being removed. Fig. 3 is an enlarged detached central longitudinal section of one end of the inner or cut-off valve, and Fig. 4 is an enlarged vertical transverse section of the valves on the dotted line 4 4 of Fig. 2.

In the drawings, A designates the steam cylinder, and B the valve-chest. The steam- Serial No- 520560. (No model.)

cylinder A is of usual construction and contains the customary piston O.

r The reciprocating valve within the steamchest is designated by the letter D and the cut-off valve within the reciprocating valve by the letter E. The valve D has at its ends the corresponding heads F F, and these heads are connected by the cylindrical open frame G, the meeting portions of said heads and cylindrical frame being provided with flanges and bolts, as shown in Figs. 2 and 4, to effect their union and form a continuous slidevaive. The outer portions of the heads F F are rectangular in general outline and are adapted to travel on the seats Ct a, formed in the valve-chest, and said outer portions of the said heads are provided with the grooves 6, containing packing d, the steam spaces or ports 66, which at the proper time are adapted to communicate with the steam-cylinder A through the usual ports ff, and the flanges g g, which are adapted to cover and uncover said ports f f, as indicated in Fig. 1. The inner ends or portions of said heads F F are cylindrical and contain the series of longitudinal ports h, and the inner surfaces of these cylindrical portions of the heads F F constitute seats for the inner cut-off valve E, which is cylindrical, and has at each end, beyond a closed head i, the longitudinal ports j, adapted to register with or be turned to cut off communication through the longitudinal ports 72. in the heads F F. The middle or intermediate section of the valve E is open to the steamchamber G, and the closed heads'i afford supports for those portions of the cut-0E valve containing the ports j, radial flanges H being provided and extending from said heads outward to pointsintermediate the ports 3'. The

-v alve E has no movement longitudinally except with the valve D, and hence said valve never leaves its valve-seats, but has simply an axial oscillatory movement thereon sufficient to bring the ports j into alignment with the ports h, so as to establish communication from the steam chamber G, through said ports j h, to the steam-space e, port f, and cylinder A, as shown at the left-hand end of Fig. 1, or to remove said ports j from alignment with the ports it, so as to cut off such communication from the steam-chamber G to the space e and steam-cylinder.

The valve I will, as shown in Fig. 1, be secured to both the valve D and valve E, any suitable means of connection being employed, the essential consideration being thatthe rod be enabled to reciprocate the valve D and at the proper time, regulated by the governing apparatus, turn the valve E. The valve-gear for driving and operating the valves D E will be of any suitable character, and as disclosing an example of satisfactory gear for this purpose attention is called to Letters Patent of the United States No. 385,533, granted to me July 3, 1888. The present invention is not confined, however, to any special form or construction of valve-gear.

At each end of the valve-chest B is provided the usual exhaust-space J.

The operation of the valves made the subject hereof will probably be understood from the foregoing description. It may be said, however, that when the valves are in the position in which they are illustrated in Fig. 1 the steam at the right-hand end of the cylinder A may exhaust, through the portf, into the space J at the right-hand end of the steamchest, and the live steam from the chamber G may pass through the longitudinal ports hj at the left-hand end of the valves D E, and enter the space 6, then in communication with the port fat the left-hand end of the cylinder A. The outward movement of the valve-rod I would reverse the position of the valves D E with relation to the ports ff, communicating with the steam-cylinder, and at such time the exhaust would take place at the left-hand end of the cylinder and the admission at the right-hand end thereof. The longitudinal ports h j of the valves D E are shown in alignment with each other, and when such is their position the steam from the chamber G may pass freely through them to the spaces e e, whence it will escape to the cylinder A through that portf which at the time may be uncovered. When during the operation of the engine the valve E is turned axially, its ports J are removed from alignment with the ports h of the valve D, and at such time the steam is entirely out off from the spaces 6 and ports f.

As above described, the valve D has a uniform reciprocation, while the valve E has no reciprocation with respect to its seats and cooperating ports, but simply an axial oscillatory or rocking movement against its said seats. The rocking motion of the cut-offvalve E is variable under the control of the governing devices, while the transverse of the valve D is invariable.

Vhat I claim as my invention, and desire to secure .by Letters Patent, is

1. In a steam engine, the reciprocating valve, combined with the cylindrical cut-oil valve carried thereby and having a movement independent thereof and reciprocating valve red I connecting said reciprocating and cut elf valves and adapted to turn axially and operate the latter, substantially as and for the purposes set forth.

2. In a steam engine, the reciprocating valve having the spaces e and longitudinal ports h, combined with the cylindrical cut-off valve seated Within said reciprocating valve and having the longitudinal ports j and the reciprocating valve red I connecting said reciprocating and cutoff valves and adapted to turn axially and operate the latter, substantially as set forth.

3. In a steam engine, the reciprocating valve adapted to cover and uncover the ports communicating with the steam cylinder, and having ports, combined with the cylindrical cut-off valve carried by said reciprocating valve and having ports arranged with respect to the ports thereof and the reciprocating Valve red I connecting said reciprocating and cut off valves and adapted to turn axially and operate the latter; substantially as set forth.

4. In a steam engine, the reciprocating valve having the heads F, F, and cylindrical intermediate section, said heads having the spaces e and inner cylindrical portions provided with longitudinal ports, combined with the inner cylindrical cut-oflf valve having closed heads and beyond these the longitudinal ports, and the reciprocating valve red I, connecting said valves and adapted to turn with the inner valve; substantially as set forth.

5. In a steam engine, the reciprocating valve having the longitudinal ports h and spaces e, combined with the inner cylindrical cut-off valve having the closed heads 'i and beyond these the longitudinal ports j and radial flanges H; substantially as and for the purposes set forth.

Signed at New York, in the county of New York and State of New York, this 16th day of August, A. D. 1894:.

ELIJAI-I F. SPAULDING.

Witnesses:

CHAS. O. GILL, ED. D. MILLER.

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