B. BLMEL.

REGULATIN G VALVE.

APPLIOATION FILED MAR. 12, 19o@t Patented Nov. 9, WG9.

BY WM TTORNET.

Civ

uiuinn srarns rarer ernten BEREHOLD BLMEL, F MIELWAUKEE, WISCONSIN, SSIGNGR TO ALLIS-CHALMERS COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION F NEW' JERSEY.

REGULATING-VALVE.

vSpecification of Letters Patent.

Patented Nov. 9, 1909.

Application ledfllareh 12, 1906. Serial No. 305,496.

To all whom 'it may concern:

Ee it known Vthat l, BEn'rHoLD BLMEL, a subject of the Emperor vof Austria-Hungary, (but having declared my intention of becoming a citizen of the United States), residing at Milwaukee, in the county of Milwaukee and State of lVisconsin, have invented certain new and useful Improvements in ltegulatingfalves, of which the following is a specification.

,his invention relates to a regulating valve in which there are two oppositely movable parts governing orA forming a passage.

ltv is especially applicable for use as a relay valve or any valve where they normal position is central and movement caused by the governorin either of two opposite directions from the central position is followed by corresponding actuation of a .controlled mechanism.

The objectof the invention is to provide in a single casing avalve means which gives by the travel of one valve a magnified portv opening by the travel of another valve. The speed of travel of the second. valve may be controlled to any desired extent, or the amount of` such travel mayI be the same as that of the first valve. The port controls of fluid for actuating the controlled mechanism.

in the drawings-Figure 1 is a side elevation in reduced scale of the relay regulating valve system with the main control cylinder in section. Fig. 2'is a central sectional view through the relay valve of Fig. l. Fig. 3 a central sectional view ofthe valve taken at right angles to the views of Figs. 1 and 2. Figs. 4. 5 and 6 are broken sectional views of modifications. Fig. 7 is a development of a portion of the upper inner surface of the valve casing of the modification shown in Fig. (5.

the invention to a relay governor.

.1 relay cylinder' 1 v(Figs. land 2) has conduits 2, 3, eommuiiicating with the opposite ends of cylinder 4. A piston l1 and rod ll2 oact with cylinder al and constitute a controlled mechanism which' has connec tion, not shown,` to a water gate, a throttle valve, or any other means of control, for regulating the same. The governor conr eche illustration shows the'applicat-ion ofv tion is shown as by ymeans of a floating lever 5 connected at one end to the tiy ball governor ring 51, at its other end to the pin valve 52 through linlrfl, and at an intermediate point to the piston rod f1.2. The fly ball governor is not shown complete in Fig. 1, merely its movable ring 51 being shown as sliding upon Xed rod 511. Any form of centrifugal governor may be used.

rl`he internal structure of the preferred form of relay valve 1 is shown in Figs. 2 and It consists essentially of two oppositely moving valves 6, 7, which, as shown, telescope each other; and the -areas of the valves subjected to pressure tending to separate the valves is one-half that of the areas subjected to pressure tending to telescope them. The outer valve 7 has ports 72, 7 3, coacting respectively with conduits 2 and 3, while the inner valve 6 has portions 62, 63, which are coextensive and coact with the ports. A port '6l between the portion 62, 63, allows of communication to either of the ports 72, 7 3, from the interior of valve 6. The'valve 7 also has ports 74, 7 5, and is closed at the end adjacent ports 75. The valve 7 has connection to a dash pot or stop 76.

@ne Vend of the inner valve 6 is closed, ex-

i cept as hereinafter' specified, and is provided with ports 65.' This end of the valve coacts directly with the valve casing. The valve 6 is formed on its outer surface with channels 6G, 67,`for a purpose which will hereinafter appear. At the same end of the valve 6 in which are formed the port-s 65 the valve is closed and provided axially with a short tube 68. `The inner end of this tube (S8-has a passage 681 which is-.one-half the size of the passage 682 in its outer end. This passage 682 is under the control of the pin valve 52. Intermediate the ends of the tube 68 are ports 683 communicating with intermediate pressure chamber 11 formed between the end of the valve 6 and the partition 12 in the casing. i

The casing has an inlet port 18 (see Fig. 3) which terminates in annular pressure chamber 131 communicating with. the interiors of the valves through ports 75 of valve 7. The casing is provided with annu.-4l lar exhaust chambers 141, .142, and with an end exhaust chamber 143, all in communication with the exhaust port 14.(s'ee Fig. 2).

vThe casing is also provided with annular chambersl 21,I 31, communicating respectively with conduits 2, 3, (see Fig. 2). Between the closed end of valve 7 and the casing is formed pressure chamber 111. An annular chamber 11? is formed in the casing and coacts directly with valve 6. A conduit 112 (see Fig. 3) connects chamber 111 with chamber 113. v

The operation of this preferred form of apparatus is as follows: Constant fluid pressure having access to the interior of the valves through port 13, the pressure will .leak past port U81 into intermediate pressure chamber 11 and also out through port 682 past pin valve to chamber-143 and the exhaust. The size of port (S81 being hait` that of i382, and the pin valve 52 normally cutting off half of the area of port G82, the Pressure in intermediate chamber 11 will be half that of the fullpressure.' This establishes a hydraulic connection, so to speak, between pin valve 52 and valve G. As the area of valve 6 in the intermediate chamber 11 is double that of the area of' valve t3 subjected to internal full pressure, this will establish the relation of half pressure on full area in one direction, and full pressure on half area in the other direction, and valve (3 will therefore be poised as longas these conditions exist. `Valve 7 will also remain poised as long as the fluid is held eiitrained below it in chamber 111 and in conduit 112. )Vhcn the pin valve 52 is moved up by the Governor, valve 6 will also be moved up by ull pressure within the valves because of the drop in pressure in intermediate chamber 11. Conduit 2 (see Fig. 2) ywill also be opened to 'full Fig. 1) in the regulating cylinder to movev pressure through ports 72. Conduit 3 will be opened to exhaust through ports 73, chan- 'nel (37, and annular chamber 141. These conditions alone will cause piston 41 (see downwardly and correspondingly actuate the controlled water gate, throttle valve, or device to which it is connected. But the porting is magnified to quicken this action' by the quick movement of the valve 7 in the opposite direction to that of 6. This is caused by the pressure being relieved in chamber 111 by the movement of valve 6. Chamber 111 is exhausted (see Fig. 3)

through conduit 112, channel (3G, and annu-- 11 to increase and to move valve 6 d0wn. u'ardly by reason 01": the hydraulic connection above described. Until it reaches mid position, the valve 7 willstill remain in its' extreme lowest position. But when the valve (3 moves very slightly beyond its mid position, the annular chamberl 113 is brought into communication with the full pressure through port (35. This will admit full pressure through conduit 112 to chamber 111 underneath valve 7 and the pressure being full pressure upward on the full area, Will cause valve 7 to quickly return to its normal mid position, thus restoring the poise. downward motion of pin Valve 52 by the governor is followed by a similar sequence of conditions and actions the reverse of those described.v f

vIn the modification shown in Fig. 4, conduit 1124, corresponding to conduit 112 of Initial y Fig. 3, is placed in communication with the intermediate pressure chamber 11 land is not controlled by valve 6, ports 65 (Fig. 3) being omitted. This structure will insure equal pressurev in intermediate pressure chamber 11 and chamber 111 at all times. struction will therefore cause approximately the same extent of travel of Valve 7 as that ot' valve 6,y but, of course, in an opposite direction. Friction is about equal in each. A dash pot or stop is not necessary.

1n the modification siiown in Fig. 5, conduit 112 is placed in communication through port 50 with annular chamber 21. I-I'i'other respects this modification is similar to *that ot' Figs. 2 and 3. The operation of this modification differs from that o1 the modification of' Figs. 2 and 3, in causing a so'mewhat diminished speed of movement of valve 7. This is for the reason that when the valve 7. moves downwardly, some of the fluid exhausted through conduit 112, channel (56, and exhaust chamber 142 is renewed by the entrance of fluidA under pressure .through port72, annular chamber 21, and

t3 is equal in area to that of port 50. This is for the reason that up to this pointof' travel the exhaust of' fluid from conduit 112 through annular chamber 113 is constantly equal to the inlet of, pressure through the port 72 because the circumferential lengths of ports 72 and chamber 113 are equal and the flow is not throttl'edby port 50. When this point of travel of' valve 6 has been reached, that is, where the opening through port 72 is equal to the` opening through port munication -is not shown,

`tained under half pressure.

7 consequently commences to move almost immediately after valve 6 commences to move.`

The niodilication shown in Figs. 6 and 7 differs from thatshown in Fig. 5 in proportionally controlling the size of port-50 by valve 6 itself. The 'conduit v112 terminatesv in annular chamber 1126, which communicates with the interior of the casing or valve seat surface through two series f ports 1136, 506. The total circumferential length of ports 506 is a fraction of the total circumferential length'of ports 1136, and some of the ports 506 may be plugged to reduce this fraction. The proper ratio is found `by test and the ports are left in diametric balance,

that is, the ports are arranged in diametric pairs. The ports 1136, 506, are controlled by corresponding walls 667 and 668 of the valve v6.- before. Beyond the wall 668 in the valve 6 is formed annular channel 666 which is in communication with the exhaust. This combut it may easily be accomplished by forming an' additional that this con- (see Fig. 2) between the. end lchamber 143 and the exhaust 14.' In operation, as the valve 6 is moved upwardly through the governor connection, communication will be established throu h ports 506 between the interior of the va ve and chamber 1126, while at the same time the,chamber 1126 is placed ins communication with the exhaust through ports 1136 and channel 66. If the sizes of the passages formed in these two communications were constantly equal, then there would be as much pressure entering. the

chamber 11,26; as is Vexhausted therefrom. ffflbis would givefthe same conditions as the 'modification shown in Fig. 4: In other words, the chamber 1126 would be main- But, as shown clearly in Fig. 7, the size of the communication with the full ,pressure Within the valves is a fraction of the size of the communication with the eXhaustA so that the will gradually This will ngive a slower downward motion4 of the -valve 7. 'It will be seenby reason of the peculiar construction of the arts 506, 1136, in the casing and the coacting' valve 6, that 'for a given travel ofthe valve 6, the total opening? of port 506 will always be a constant fraction of the total .opening of port 1136. down- 'contradistinction to lpatent statutes, the

Between these are ports 65, asl

Yvided with ports,

Thevalve 1,6 will then control the passages 506,1136, at a constant ratio of opeiiiiiprfor pressure actuationot valve 7.. This will insure the prompt action of the valve 7 as soon as the valve 6' is moved-` the inlet to conduit. 112 bears a constant ratio to the outlet therefrom. This is in modification 'of Fig. 5 in which the valve 7 is subjected to upward half-A pressure until. the opening past port 72 becomes equal to port 50; also, where the area of inlet to conduit 112 bears no constant ratio to the area of outlet.

In accordance with the provisions ofthe principle ofA v operation of the invention has been described, together, with the means which `is now considered to. represent the best embodiment thereof; but it is desired to be understood that the means` shown is merely illustrative and that the invention can be carried out by other means.

It will also insure that What is claimed and it is desired to have secured by Letters Patent is,--

1. A casing, a plurality of oppositely movable valves therein, passagesin the casing, one of the valves controlling a plurality of said passages and by other of the valves in the opposite direction. 2.- A casing, a plurality of valves therein2 and Asets of-passages in the casing, one of the valves controlling the sets vof passages moving in either' direction allowing pressure actuation of anat a constant ratio of opening for pressure actuation of another .of the valves.

l 3. The combination with'a casing p rovided with ports, oli a valve provided with ports lseated* inV said casing and movable therein under the influence of a fluid under pressure admitted to said casing, la second valve also providedwith ports adapted to register with the ports of said first mentioned valve and the ports of said casing,

said second mentioned valve being also movably seated in said to be actuated by casing and being adapted the i'luid under pressure admitted to said casing.

-1.The .combination with a casing provided with poi-ts, of a valve provided with ports seated provided with portsalso seated in said casing, the ports in said valves and casing being adapted to register, and each of said valves being provided with opposed pressure surfaces whereby differences of pressure ef the fluid upon said surfaces arey adapted to actuate said valves.

f5. Tho combinati-,ieu with a casing pro- 0i a valve provided with ports seated in said casing, a second valve provided with ports also seated in said casing, the portsin said valves and casing being adapted to register, and each of said valves in said-casing, a second valve j being provided with opposed pressure surated, both said valves eoaetingfg` to establish 10 faces whereby differences of pressure of the the same passage through said casing and Huid upon said surfaces are adapted to acmoving in opposite directions. v

tuate said valves, and, means to vary the In testimony whereof I aix my signature 5 pressures exerted upon said pressure surin presence of two Witnesses.

faces of said vaivesby the Huid. BERTHOLD BLMEL.

6. The combination with a casing, of a Witnesses: y movable valve therein, and a second valve in' l JOHN DAY, J r.,

said casing the- Valve being pressure actu- G. F. DE WEIN.