US790536A - Valve mechanism. - Google Patents

Description

110.790,536. l y, PATBNTED MAY23,1905. W. R.=TEMPLET0N. l

VALVE MECHANISM.

APPLICATION FILED JULY 23,1904.

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Patented May 23, 1905.

- UNITED STATES PATENT OEEICE.

' YILIQIAM R. TEMPLETON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO TEMPLETON MANUFACTURING COMPANY, OF BOSTON, MASSACHU- SETTS, A CORPORATION OF MAINE.

l VALVEv MECHANISM.

SPECIFICATION Vteeming.para of Letters Pate-nt No. 790,536, Vdated May 23, 1905.

.Lippiication lined ruiy 2s, 1904. seriai No. 217,766.'

I To all whom it Wawy concern.-

"tion of simple and eliicient valve mechanism Be it known that I, WILLIAM R.V TEMPLE- roN, a citizen of the United States. and a resiz dent of Boston, county of Suffolk, State of Massachusetts, have invented an ImprovementY in Valve Mechanism, of which the following ing drawings, is a specification, like characterson the drawings representing like parts.

This invention hasfor its object the producor water, steam, or other iuid motors where- `by the admission and discharge of motive fluid 'from the motor-cylinder are effected without the use of packing, stuliing-boxes, and similar leak-preventing devices. The construction and arrangement of the valve mechanism are such f that the pressure of the incoming motive iiuid serves to tightly seat and hold the valve within its casing or shell.

The various novel features of my invention 4'will be fully described in the subjoined speciication and particularly pointed out in the' 'following claims.

I have herein chosen to illustrate my invention in connection with a water-motor air- 'compressing apparatus, for which'my invention is particularly well adapted; but it is to be understood that my invention isfin no sense restricted to such use or application, nor to the control of any particular motive iiuid.

Figure l is a top or plan view of a duplex air-compressor with the cylinders of themotor provided with valve mechanism embody- `ing one form of my present invention. Fig; 2 is 'a partial sectional View on the irregular line 2 2 2, Fig. l, looking toward the right, lshowing very clearly the construction of the 'valve mechanism. Fig. 3 isl a side elevation 4of the valve-shell, showing the admission and exhaust ports therein. Figs. 4 and 5 are side 'elevations of the valve, the latter being turned one-quarter roundin Fig. 5 from the position shown in Fig. 4. Figs. 6 and 7 are enlarged horizontal sectionsth rough the admission and exhaust ports or openings, respectively, of the shell and valve when the valve is set'in one position; and Figs. 8 and 9 are similar views, but showing the valve set in its other position to admit motive iiuid to the outer end of the motive cylinder and exhaust from its inner end viewing Fig. 1. y l y Referring to Fig. l, A A represent two aircompressing cylinders provided with suitable valves `for inlet and egress of air and forming no part of my invention,'said cylinders being rigidly mounted on a base or bed B, and two motor-cylinders C C are mounted on the bed in axial alinement with the compressing-cylyiriders, the piston-rods a a liavingsuitable pistons (not shown) within the motor and compressing cylinders, respectively. The motorcylinders are connected by a chambered casting CX, having an inlet-port c', opening into a compartment c2, (see Fig. 2,) and an outlet or discharge port c3, which communicates withthe two lower compartments o4 in the casting. Adjacent each cylinder a hole-is bored through the casting from top to bottom, as at ox, Fig. 2, each hole communicat- `ving with the compartments c2 and 04 of the castingV on the one side and on the other side Acommunicating with the admission and exhaust passages of the adjacent motor-cylinder. A

The admission-passages for the cylinde'ii` C are shown atc10 ou on dotted lines, Fig. 1, and the end of one of the exhaust-passages is shown at cl2 in Fig. 2, the outer ends 0I' the exhaustpassages being in practice below the correv.

thrust-bearing L is presented at the lower andv smaller end ofthe shell,the shell being slightly tapered internally. A threaded cap 5 screws .into the casting CX and closes the upper end of the hole 0X, forming a supply-chamber 6,

Fig. 2, which is located at the upper end 'of the shell. y

Referring to Fig. 3, I have shown two elongated and longitudinally-extended ports 7 7X in the shell near its upper end, which ports register with the ends of the admission-passages 010 ou of the cylinder when the shell is in place, and such ports I term admissionports. These ports are near each other, and below them I have arranged two similar ports 8 8 to register with the cylinder exhaust- .passages 012, while a much larger port 9 is formed in the shell opposite the ports 8 8X. These latter I have for convenience termed Lauxiliary exhaust-ports of the shell and the port 9 the main exhaust-port thereof.

Packing, stuiiing-boxes, and similar devices for preventing valve -leakage have been largely used; but in my present invention I have constructed the valve mechanism in such manner that the use of such antileak devices is obviated. `To this end the valve proper is made as a metallic elongated plug 10, shown separately in Figs. 4 and 5 and tapered to correspond to the internal taper of the shell, the latter andthe plug being preferably ground to secure a Huid-tight fit. The valve is rotatably mounted in the shell, and its lower end is seated on the annular thrust-bearing 4, the valve being' red uced in diameter and prolonged to form a spindle 11, which is adapted to pass easily through the center of the bearing and project beyond the shell, as in Fig. 2. At its upper end the valve is cored out to form a chamber 12, open at its upper end, and thus in continuous communication with the supplychamber 6, and two like openings 13 13 are formed in its side walls diametrically opposite each other, as will be apparent from Figs. 6 and 8. These openings are at such a height that when the valve is oscillated they will alternately coperate with the admissionports 7 7X of the shell, as will be manifest. Below the chamber and whollyseparate therefrom a large transverse passage 14 is formed in the valve, extending diametrically therethrough and adapted to connect the main exhaust-port 9 with either of the auxiliary ports 8 8 of the shell.

Referringto Fig. 2 it will be seen that the incoming' motive fluid passes from the compartment c2 into the supply-chamber 6 and lls the valve-chamber 12, the pressure of the iiuid acting upon the valve in the direction of its length to maintain it seated Huid-tight upon the thrust-bearing 4 without any packing, glands, or stuffing-boxes. The fit between the shell and valve prevents any leakage therebetween. Now when the valve is turned into the position shown in Figs. 2, 6, and 7 the fluid will vpass from chamber 12, through the opening 13 and admission-port 7, to the cylinder admission-passage 01, and the fluid will be admitted at one side of the piston to move the piston-rod a to the left, Fig. 1, while the exhaust passes through passage 012 and port 8X to the passage 14 and thence through the main exhaust-port 9 into the exhaust-compartmenta4 of the casting (fx. The valve is then turned by any suitable mechanism into the position shown in Figs. 8 and 9, shutting ports 7 and 8 and connecting port 7X by opening 13X with the chamber 12, to admit iiuid through passage c to tile'lQ/flhand end of the cylinder. At the same time the passage 14 connects the main exhaust-port 9 and auxiliary port 8 to exhaust tllC .ighthand end of cylinder C, Fig. 1, the several ports in the valve being so located and of such size that the desired admission and exhaust are secured. The width of the port 9 is sufiicient to register with the valve-passage 14 when the latter at its opposite end cooperates with either auxiliary port 8 or 8", and when the valve is turned there will be an interval when both of the latter ports are closed by the solid wall of the valve.

Any suitable valve-operating mechanism may be employed, and I have shown in Fig. 1 a simple and effective form of such mechanism, which I will describe brieilv. Pinions 2O 30, Fig. 2, are secured to the projecting valve-spindles 11 in such manner that the pinions will be in different horizontal planes, said pinions meshing, respectively, with segmental gears 21 31, mounted to rock on an uprig'ht port on the bed B. A link 22 pivotally connects the segment-gear 21 with the end of a lever 23 fulcrumed on a port /X on the bed, the opposite outer end of the lever being pivotally connected with the piston-rod c by a coupling 24. Similarly a link 32 connects the segment-gear 31 with a lever 33,

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also fulcrumed on the port bx, the lever being connected at its outer end with the piston a, by a suitable coupling 34. The reciprocatory movement of each piston operates through the described connections to oscillate the valve controlling the admission and exhaust of the other motor-cylinder, as will be manifest, the relation between the two valves and their actuating devices being such that one piston-rod will be moving when the other piston-rod is changing its direction of movement, so that the two motor-cylinders cannot get on dead-center.

By the valve construction herein described the pressure of the incoming motive Huid always maintains the valve properly and tightly seated, preventing leakage or lifting of the valve at the time of exhaust from back pressure; secondly, the wear on the side walls of the shell is practically inapprcciable, as the thrust-bearing at the bottom takes up the pressure of the valve, the bearing presenting sufficient area for the purpose, and the friction between the valve and the sides of the shell is reduced to a minimum; thirdly, neither the valve itself nor the valve-stein or spindle requires any packing or stuiling; iinally, the number and arrangement of ports is such that a single valve controls the entire admission and exhaust for the motor-cylinder.

Various changes or modiiications in details spirit and scope of my invention.

A Having described my invention, what I claim, and desire to secure by Letters Patent, is-

1. Valve mechanism comprising an elongated shell, a supply-chamber located at one end thereof and a thrust-bearing at its opposite end, said shell being provided with lateral admission-ports .and exhaust-ports, a valve rotatably mounted in the shell and seated at one end on the thrust-bearing, a chamber in the opposite end of the valve in continuous communication with the supply-chamber and having openings in its walls to coperate with the admission-ports, and a transverse passage through the valve and located between the bottom of the valve-chamber and the bearing end of the valve, to coperate with the exhaust-ports of the shell, the pressure of the motive fluid in the supply-chamber acting longitudinally of the valve to maintain the saine seated upon the thrust-bearing.

2. Valve mechanism comprising an elongated, internally-tapering shell, a supplychamber located at its larger end and a thrustbearing at its opposite end, said shell being provided with lateral admission-ports, and exhaust-ports on opposite sides of the shell, a correspondingly-tapering valve rotatably mounted in the shell and having its smaller, Hat end seated on the thrust-bearing, an openended chamber in the opposite end ofthe valve in continuous communication with the supplychamber and having openings in its walls to cooperate with the admission ports, and a transverse passage through the valve below the bottom of the chamber therein, to coperate with the exhaust-ports of the shell, the pressure of the motive iuid in the supplychamber acting longitudinally of the valve to maintain the same seated upon the thrustbearing and in contact with the tapering walls of the shell.

3. Valve mechanism comprising an elongated, internally-tapering shell, a supplychamber located at its larger end and a thrustbearing at its opposite end, said shell being provided with lateral admission-ports near its upper end and a main and two auxiliary exhaust-ports near its lower end, a correspondingly-tapered, solid valve rotatablymounted in the shell and having its' smaller, lower end seated on the thrust-bearing, an open-ended chamber in the upper end of the valve open- 1ng into the supply-chamber and having openings in its side walls to cooperate withV the admission-ports, and a transverse, diametral passage through the valve below the bottom of the chamber therein to intermittingly establish communication between the main and either auxiliary exhaust-port, the pressure of the motive fluid in the supply-chamber acting upon the upper end of thevalve to maintain the same seated upon the thrust-bearing and in contact with the tapering walls of the shell.

4. Valve mechanism comprising an elongated, internally-tapering shell, a supplyextended through the latter and projecting beyond the shell, anopen chamber in the upper end of the' valve in continuous communication with the supply-chamber and having openings in its side walls to intermittingly cooperate with the admission-ports of the shell,

lsaid valve. having a diametrical passage eX- tend'ed through it below the chamber to at times connectexhaust-ports on opposite sides of the shell, the pressure ofv the motive iiuid in the supply-chamber acting upon the valve longitudinally to maintain it seated upon the thrust-bearing and Huid-tight in the shell Withj out packing, and valve-actuating means connected with the projecting end of the valvespindle.

5.- Valve mechanismV comprising an internally-tapered shell, a supply-chamber located at its upper end and a thrust-bearing formed byits lower end,'said shell being provided with lateral admission and exhaust ports, a correspondinglytapered valve rotatably mounted Within the shell and seated at its lower end upon the thrust-bearing, the upper endof the valve receiving the pressure of the motive fluid in the supply-chamber, to maintain the valve'iuid-tight Within the shell without packing, passages in the valve to intermittingly connect the supply-chamber and the admission-ports of the shell,vand a separate passage in the valve to cooperate lwith the exhaust-ports of the shell.4

6. The combination with 'a motor-cylinder having admission vand exhaust passages, of controlling-valve mechanism comprising a fixedly-mounted, internally-tapering shell, asupply-chamber located at its upper end and said shell having two adjacent admission-ports registering with Vthe admission-passages of the cylinder, a mainl and two auxiliary exhaustports, the latter registering with the cylinder exhaust-passages, and an annular thrust-bearing at the lower end of the shell, a correspondingly-tapered plug-valve rotatably mounted in the shell and seated at its lower end upon the thrust-bearing, said valve having an open chamber in its upper end communicating with the supply-chamber and provided in its side IIO Wall with openings to intermittingly cooperate l In testimony whereof I have signed my name with the admission-ports, the valve having a to this specioation in thepresonce of two sub- 10 transverse passage therethrough below the scribing witnesses. chamber, to at times connect the main and one f t f v 5 of the auxiliary exhaust-ports of the shell, a V ILLIAM R' 'I'LMl LIMON valve-spindle projecting through the thrust- Vitnesses: bearing and beyond the shell, andv valve-aetu- JOHN C. Enmmns, ating means connected with the spindle. l ELIZABETH R. MomusoN.

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