US2411732A

US2411732A - Control device

Info

Publication number: US2411732A
Application number: US463915A
Authority: US
Inventors: Cecil S Kelley
Original assignee: Westinghouse Air Brake Co
Current assignee: Westinghouse Air Brake Co
Priority date: 1942-10-30
Filing date: 1942-10-30
Publication date: 1946-11-26
Anticipated expiration: 1963-11-26

Description

Nov. 26, 1946.- C s, KELLEY QONTRL DEVICE 4 sheets-sheet 1 Filed oct. 3051942'Y INVENTOR- Cecil Afeugy BY QQ ATTORNEY Nov. 26, 1946. c. s. KELLEY 2,411,732

CONTROL DEVICE Filed Oct. 50,v 19,42 4 Sheets-Sheet 2 n ESO INVENTOR @KR MM AT1-ORN EY Cecililjly 1 Nov. 26, 1946. c. s. KELLEY CONTROL DEVICE Filed Oct. 30, 1942 4 Sheets-Sheet Z5 Ce cil, 5. EQU,

ATTORN EY Nov. 26, 1946. C. s. KELLEY 2,411,732

CONTROL DEVICE 'Filed oct. 50, 1942` sheets-sheet 4 INVENTOR Cecil SKelle M M Q Y@ ATToRNl-:Y

Patented Nov. 2,6, i946 2,411,732 coNTnoL DEVICE Cecil S. Kelley, Forest Hills, Pa., assigner to The Westinghouse Air Brake Company, Wilmerding,

Pa., a corporation of Pennsylvania Application October 30, 1942, Serial No. 463,915

3 Claims. (C1. 711-471) This invention relates to control valve devices for governing now of fluid under pressure and more particularly to the manually operative type.

In the patent ofRoy Stevens, No. 2,383,278, August 2l, 1945, there is disclosed an arrangement for selectively controlling the maneuvering gear of a reversible Diesel engine. which is em`- played to propel a-water craitl d This maneuvering gear has a neutral'po'sition in lwhich the en'- gine is stopped, and is `rotatable to one side of neutral position to a start position for causing the engine to be placed in operation in a direction to cause movement of the ship forwardly. Between this vstart position and the neutral position there is a full position to obtain full engine speed ahead, a slow positiontomcause operation of the engine at idling speed, and the maneuverin g'gea'r vmay be adjusted to any selected position between said full'and slow positions to obtain diierent Yengine speeds. There is also a stop position vfor stopping the engine. The maneuvering gear is also rotatable to the opposite side of neutral position to reversely arranged start, full, slow, and stop positions for obtaining astern movement ofthe craft.

For positioning the maneuvering gear a iiuid motor is provided which is operative by iiuid pressure supplied to either one of two pipes while the .other pipe is open to the atmosphere, the pipe supplied with fluid under pressure determining theside of neutral position to which the maneuvering gear will be operated, and the degree of fluid pressure provided in the selected pipe determining the position to which the maneuverin gge'ar is moved.

'The principal object ofthe invention is the provision oi a multi-position operators control device for selectively controlling pressure of fluid in l.twopipes to govern operation of a motor such as above described and embodying novel arrangements for deiining different positions thereof andA for automatically preventing said device inadvertently remaining in certain of said positions. .Other Aobjects and advantages will be apparent from the following more detailed description of the invention. 4

In the accompanying drawings: Fig. l is an elevational view of one end of the improved control device; Fig. 2 is a sectional view taken generally on the line 2 -2 in Fig. v'1 but with certain parts broken awayto more clearly show certain interior construction of the device;` Figs. 3 to 6 are sec. tional views taken substantially on the. lines 3-,i 3,'f`

4&4; .iffaalid -arespectively, in Fig. 2; and

Fig. 7 is a sectional view taken on the line 'I-l in Fig. 6. v Description As shown in the drawings, the control valve vdevice comprises an irregular ring-shaped com.-l

base member 3 is secured by cap screws 4' to the g upper face oi the bracket I and a' casing section is secured by cap screws t to the' lower face of the base member 3 within the bracket I.`

vThe base member 3 hastwo vertically extendy ing parallel arranged end walls 'I and 8 connected together adjacent their base by a raised portion 9. At one side of the raised portion 9 andbetween the base'member 2 and the top of end walls 'I and 8, said walls are connected together by the strengthening rib IB.

' The raised -portion S has substantially midway between the end walls 1 and 8 la chamber II and an inner wall I 2 separatingsaid chamber from a chamber I3 Iprovided above a flexible diaphragm I4. The two chambers II and I3 arein communication with each other through a stabilizing choke I5.

The diaphragm the adjacent end of vthe .casing section 5. An oppositely arranged and axially aligned exible diaphragm I6 is clamped around its edge between the opposite end of casing Section5 and a cover I1. 'A' chamber I8 is formed between the dia-v phragm I6 and cover `Il and is in constant cornmunication with the atmosphere through anv the'casing'sectiOn 5, the passage 'I9 leading to Chamber 2,8-

The rib 2 3 supports in chamber 2i! one rend of a controljspring theoppositeend of which bears against' an annular spring seat 39. The'seat '3 9 ijsmounted'pn avstem`21 and/urged by spring 33 against ,a yshoulder 48 on said'stem. The spring I4 is clamped aroundits edgev between the'lower face of the

b ase member

3 and 38 is fully expanded with the parts of the device in the position shown and is operative to oppose downward movement of the stem 21 and thereby of diaphragme lil and I3 from this position, as will be hereinafter described.

The central portion of diaphragm I4 is clamped between two followers 24 and 25, the follower 25.

engaging an annular collar 25 provided on stem 21, which stem extends through the chamber 20 and said followers and diaphragm into chamber I3. A nut 28 disposed in chamber I3' has screwthreaded engagement with the wall of a bore 29 provided in the end of stem 21 and is tightened against the follower 24. Y Y y The rib 23 has a bore lined with a wear bushing 38 arranged in axial alignment with the two diaphragms I4 and IS, and the stem 21 extends through this bushing and centrally through the the diaphragm I 3 into chamber i8. Above the rib 23 thestem 21 is reduced in section to provide a shoulder 32, and a wear sleeve 3| is mounted on this reduced portion of the stem with one end in engagement with said shoulder. The sleeve 3| extends through bushing 3e in sliding contact therewith and its opposite end contacts a follower 33 which is disposed in chamber 2| in contact with the upper side of the diaphragm i6. The stem 21 extends through follower 33 and a follower 34 mounted against the opposite face of the diaphragm I3, and a nut 35 provided on the end of stem 21 in chamber I8 is tightened against the follower 34 clamping same centrally to one side of the diaphragm I6 and thereby securing the follower 33 against the opposite side of the daphragm.

An adjusting screw having a screw-threaded connection with cover I1 extends through said cover into chamber IB in alignment with nut 35 for engagement thereby. A lock nut 31 is provided on screw 3S for engagement with the exterior of the cover I1 to lock said screw in an adjusted position.

The nut 28 above diaphragm I has an upwardly extending sleeve-like projection 48 the end of which is mounted to slide in one end of a sleeve 4I. This end of sleeve 4I is secured in a bore through wall I2 and the sleeve extends through chamber II and the opposite wall thereof in the raised portion 9 of the base member I to a point above said raised portion between the end walls 1 and 8.

The bore 29 in the diaphragm connecting stem 21 is in permanent communication through a smaller bore 42 and one or more radial ports 43 with chamber 20 and contains a uid pressure supply valve 44 having a fluted stem 45 extendingthrough an axial bore provided in nut 28 into the projection 45 thereof wherein it contacts a fluid pressure release valve 46. The nut 28 is provided with a seat for engagement by the valve 44 and a spring 49 extending through bores 29 and 42 acts on said valve for urging same into contact with said seat.

A plunger is slidably mounted in sleeve 4I above the release valve 43 and is provided with an .annular groove 5I in which there is disposed a sealing ring 52 contacting the bottom of said groove and the wall of said sleeve for preventing leakage of fluid under pressure from a chamber 53 below the plunger to an annular chamber 54 above the plunger. The chamber 53 is in permanent communication with theinterior of the sleeve projection 45 of nut 218 and through one or more radial ports 55 in sleeve 4I with chamber II. The chamber 54 is constantly open to the atmosphere through one or more radialports 55 provided in sleeve 4I above the plunger 55.r

The plunger 5|] has a portion 51 of reduced section depending therefrom into chamber 53 and. provided with an axial bore opening through au valve seat on its lower end which is provided fori engagement by the release valve 45. The release. valve 46 has a fluted stem 58 extending through this bore into a bore 59 of larger diameter in which there is slidably mounted a spring seat 'having one or more openings 6I adjacent its peripheral edge connecting the spaces at opposite sides of said seat. The plunger` 55 also has an upwardly projecting portion 62 of reduced section extending through chamber 54 and in sliding engagement with an inturned collar 63 provided at the upper end o-f sleeve 4|. The bore 59 extends to a point above collar 63 where it joins a screw-threaded bore 64. Just below the end of the screw-threaded bore 64, the portion 62 of plunger 58 has two oppositely arranged radial bores 65m which are disposed pins E6 extending from opposite ends of a cylindrical spring seat 51 which is of slightly smaller diameter than bores 65 so that said seat may be inserted into bore 59 through either of the bores 65. A coil spring 68 is disposed in bore 59 under pressure and acts at one end on the spring seat- 51 and at the opposite end on the spring seat this spring biasing the release valve 46 to its open position shown and moving the spring seat 61 upwardly until the pins 66 engage the uppermost portions ofthe bores 55 in which position the Spring seat @l is held against longitudinal movement and thus secured within the bore 59.

An operating screw 1E) is threaded into bore 64 and on its outer end is provided with a head 1I. gage the end of the extended portion 62 of plunger 50 for securing the screw 1D in an adjusted position. A coil bias spring 13 under pressure encircles the portion of sleeve 4I extending above the raised portion 9 of the base member I and is supported at one end on said member while its opposite end bears against a ring-shaped seat 'i4v secured on the portion 62 of plunger 50 by suitable interlocking means 15.

The raised portion 9 of the base member 3 containstwo like

selector valve devices

82 and 83 arranged one at each of thel opposite sides of chamber II and thus between said chamber and the end walls 1 and B, respectively.

The selector valve device 82 comprises two oppositely seating axially aligned

poppet valves

85 and 86 which are arranged to move in a direction at right angles to the axis of sleeve 4 I. The valve 85, which is a duid pressure supply valve, is contained in a cavity 8.1 which is open to chamber II, and said valve has a iluted stem extending through a wall 88 into a chamber 89 which is open to a pipe 90. The valve 85, which is a release valve, is contained in a chamber 9| which is open through a passage 92 to the atmosphere. The valve` 85 has a fluted stem extending'through a wall 53 into chamber 89 wherein it engages the stem of the supply valve 85. The stems connecting the two valves provide for seating of one valve when the other is unseated. Y

.A cap nut` 94 closes an opening to cavity 81 and hasa bore containing a coil spring 95 which bears'against the supply valve 85 for seating same and at the same time unseating the release valve 86. A cap nut 98 closes an opening to the release bore in axial alignment with said valve and in A lock nut 12 on screw 18 is arranged to enwhich there is slidably mounted an operating f sleeve 91. 'The sleeve 91 is. closed at its outer end but has a bore open at its inner end and in this bore is slidably mounted a plunger 90 which bears against the 'releasev Valve 86 and behind this plunger is a spring 39 under pressure and acting on said plunger. The plunger 98 has a stem |00 extending through spring 99 and in the inner end of said .stem is a diametrical elongated slot through which extends a pin I| secured at opposite ends in sleeve 91. With the release valve 86 unseated by spring 95 the is removed from said valve by engagement of pin IOI with one side of the slot in the plunger stem |00. Upon inward movement of sleeve 91 it acts through springSQ on plunger 98 to seat the valve 876 and unseat valve 85. The spring 99 then provides for further inward movement of the plunger 91 relative to the release valve 86, by means which will be hereinafter described.

The selector valve device 83 is identical in structure to the device 82 and therefore will be described vonly briefly. The selector valve device 83 comprises a supply valve |05 contained in a cavity |06 which is open to chamber and is operative to control communication between said cavity and a chamber |91 which-is open to a controlpipe fl 08. Y The valve device further comprises an oppositely seating release valve |09 contained in a `chamber I Iii which isopen to atmosphere through a port The release valve |09 is -arranged to control communication between chamber I I-0 and chamber |01. A spring I I2 in chamber |06r acts on the supply valve |65 to seat same and at the same time unseat the release valve |69, while a plunger IIS is arranged to be operated by a spring ||4 uponpinward movement of an operating sleeveI I5to seat the release valve |09 and open the supply valve |05. i v It will now be seen that while brothl of the selector valve devices. are of identical structure, the selector valve device 82 is provided for controlling ,communication between pipe 9|), and cham,- ber III and atmosphere, whilegthe selector valve device 83 is provided to control communication between pipe I-08,and chamber II and atmosphere.

Directly above the screw 10 connected with plunger. 5i] there is an operating shaft |20 extendin g atright angles to the axis of said plunger between the end walls 1 and 8. This shaft has at one end an `enlarged portion |2| which is journaledjina bushing |22 secured in the end wall 1 while the Aopposite end of Athe -plunger extends through a bushing |23 secured in the AWall 8. Slidably mounted on shaft between the end walls Tand 8 are cams |24-and |25 disposed directly over the

selector valve devices

82 and 83 respectively, and a cam |23 disposed directly over the plunger operating screw 10. Between the cams |24 and |23 is a disk-like .quadrant |21,

while betweeny the cams |25 and |26 isa spacer sleeve |28.

The operating shaft |20 is provided with a slot extending substantially from wall i to wall 8 and in this slot is a key |20. The cams |24, |25, and |26 and the quadrant |21 4are properly groovedftoreceive thek'ey E29 for securing said cams 'and quadrant in desired relative positions on the 'shaft for rotation therewith. `In assembling-,the shaft |20 is threaded through the bushing |122 and then :serially Vthrough theseveral cams, the quadrant; the spacer sleeveand nally through .lthezbushing 123 into which aV bearing sleeve is inserted over the end of theshaft.

pressure of spring 99 The combined lengths .of the shaft bearings inthe Several cams. inthe quadrant and the spacer sleeve is substantially Ythe same as the distance between the bearing bushings |22 land |23 in order to hold the cams and quadrants in definitie positions between the walls v1 and 8.

A hand operated lever or handle |3| is Drovided for turning the shaft |20 and thereby the several cams and quadrant mounted thereon. By way of example the lever I3I may have at either Side of a neutral position, Zonesof movement suchias indicated in Fig. 1 by the legends VAhead and Astern, and in each Zone there may be a plurality'of diierent positions such as are also indicated in Fig. l by legends. 5

The hand operated lever I3| further comprises a spindle |36 one end of which is rigidly connected by screw threads and a rivet |31 to the operating member |32. A locking member |33 is slidably mounted Ion the spindle A|33 to a position adjacent the operating member |32 and beyond this locking member is ahandgripportion |39 screw-threaded to the spindle |36 as at |40. The inner end of `the hand grip portion |39has a recess inwhich there is disposed a coil spring I4| which vis underr pressure and bears against the locking member v|38 for urging same in the direction of the operating shaft |20.I A recess |42 is provided in the opposite end of the hand grip portion |39 for receiving a nut |43 which is secure-dv by screw-threads to the outer end of spindle |36. lThe outer end of recess |42 is closed by a cap |44 secured in the end of the hand grip portion 4|39 by a rivet |45. It will be seen that due `to the Vscrew-threaded connection between the hand grip |39 and spindle |36 said grip is capable Aof rotation relative to the spindle, and upon rotation in one direction will move longitudinally of the spindle toward the locking mem- .y

ber I 38 While uponrotation in the opposite ydirection said grip will move away from said locking portion.

Projecting from wall 8 in the direction of stem I 36 is an arcuate rib |46 having `formed around its outer surface an arcuate V-shaped rail |41 arranged concentric to the operating shaft |20. The operating member |38 on spindle |36 has a projection provided with an arcuate groove into Whichthe rail |46 fits, the -rail being of such length as -fto remain in :said groove throughout the full range of movement of the lever ISI. When the lgrip -I39is turnedvon the spindle |36 against the locking member |38, said member is .forced against the rail |41 to .thereby secure the han-d operated lever |3I against movement. In order to move the lever I3I,V the grip |39 is turned out' of contact with the locking member |38 whereupon the force between said member and the rail |41 is reduced'tothe smallV amount providedby ,spring ;I.4.I which does .not interfere with freezmovement of .saidleven but which maintains the parts constantly in cooperative relation and avoids chattering between said parts.

' A fulcrum bar |48 arranged parallel to the operating shaft |20 is disposed at one side thereof substantially opposite the rib ||l and has its opposite ends supported in suitable bores through the end walls 1 and 6. Rockably mounted on this bar are two levers |49 and |50 aligned with the peripheries of cams |24 and |25, respectively, a quadrant arm aligned with the periphery of quadrant 21, and an arm |52 aligned with the periphery of cam |26, and between the lever |50 and arm |52 is a spacer sleeve |23 which is secured to the bar |48 by a key |54.- The combined length of the bearing portions of the two levers |49 and |56 of the two arms |5| and |52, and of the sleeve |53 is substantially the same as the distance between the `walls 1 and 8 carrying the ends of the fulcrum bar |48 so as to thereby maintain the diiierent levers and arms in cooperative relation with the respective cams or quadrant on the operating shaft |26, vand the key |54 cooperates with said bar to hold these parts properly assembled between the ends walls 1 and 8.

It will be apparent that cooperation of the raised portion |64 on the quadrant arm |5| with the different recesses in the quadrant |21 not only act to define the different positions of thel operating lever |3| butv also to oppose movement of said lever Afrom one position to another and thus tend to prevent accidental shifting of said lever.

` The lever |49 has an upwardly extending arm provided on its end with a` nose |15 disposed to contact the peripheral surface of cam |24. This lever also has a downwardly extending arm |16 in the lower end of which is screw-threaded an adjusting screw |11 arranged to engage the operating sleeve 91 of the selector valve device 82. A lock nut |18 is provided on the screw |11 for engagement with arm |16 to secure the screw |11 in an adjusted position.

Directly above the selector valve device 82 is a pin having one end supported in the arm |16 adjacent the adjusting screw |11. This pin is slidably mounted in a bore provided through a rib I8! connecting the raised portion 9 of the base member to the end wall 1. A spring |82 encircling the pin |80 bears at one end against the rib |'8| and at the opposite end against a collar |83 provided on the p-in adjacent the lever arm |16. This spring is under pressure and therefore eifectiveto hold the nose portion |15 of lever |49 in constant contact with the peripheral surface of cam |24.

The peripheral surface of cam |24'has a portion |84 formed at a radius to permit the lever |49 to occupy the position shown in Fig. 4` in which the supply valve 85 of the selector valve device 82 is seated and the release valve 86 is open. The surface of cam |24 also has a portion |85 formed at a greater radius for displacing the lever |49 in a clockwise direction as viewed in Fig. 4 for seating the release valve 86 and opening the supply valve 85. These two portions |84 and |65 of the peripheral lsurface of cam |24 are joined by a connecting portion |86 which is so located that upon clockwise movement of the operating lever |3|, as viewed, in Fig. 4, or open movement of said lever into the "a1iead zone, the release valve 86 'of the selector valve device 82 will be closed and the supply valve 85 opened by cam |24 in a position of said lever intermediate the neutral and stop positions in said Zone and then vbe maintained in this condition in all positions of said lever between such intermediate position and the start position at the opposite end of said zone. When the lever |3| is moved to neutral, the portion |84 of the surface of cam |24 will be moved under the nose |15 of lever |49 to permit seating of the supply valve 85 and opening of the release valve 86 just before obtaining neutral position and this condition of said valves will then be maintained in all positions of the operating lever |3| at the opposite side of neutral position.

The lever |50 has one arm provided with a nose portion |96 engaging the peripheral surface of cam |25 and another arm |9| provided in its end with an adjusting screw |92 disposed to contact plunger Il 5 of the selector valve device 83, a lock nut |93 being provided on the screw |02 for engagement with said lever to secure said screw in an adjusted position. One end of a pin |94 is disposed in a recess in the lever arm |9| while its other end is slidably mounted in a suitable bore provided through a rib |95 connecting the raised portion 6 of the base member 2 with the side wall 8. A coil spring |96 mounted on pin |94 bears at one end against the rib |95 and at its opposite end against a collar |91 provided on said pin. This spring is under pressure and therefore effective to hold the nose portion of lever '|9I in constant contact with the peripheral surface oi cam |24.

The peripheral surface of cam |25 has portions |97 and |98 formed at different radii and connected by an inclined portion |99, these portions corresponding to like portions |84, |35 and |88 on the cam |24. T he portion |99 of cam |25 is so located as to operate lever |50 for seating the release valve |09 and opening the supply valve in the selector valve device 83 .when the operating lever |3|, upon counterclockwise movement as viewed in Fig.'5, or upon movement into the astern zone, passes through a position intermediate the neutral position and the stop The cam |25 is then adapted to maintain these valves in this condition in all positions of the operating lever |3| beyond this intermediate Aposition in the fastern Zone and to provide for'closing of the supply valve |05 and opening i of the release valve |09 in all positions of said lever to the right of this intermediate position and in the ahead" zone.

. VIt will be noted that the two selector cams |24 and |25 are of identical structure but that one is mounted on the operating shaft |2| in turned over end to end relation with respect to the other. Each is provided with two key ways, as shown in Figs. 4 and 5, one key way for cooperation with key |29 to provide cam |24 and the other key way for cooperation with said key to provide the cam |25.

From the above description it will now be seen that with the operating lever 3| in neutral position, as shown in the drawings, the supply valves will be closed and the release valves open in both of the selector valve devices 32 and 83. When the operating lever |3| isk turned out of neutral `position into the ahead Zone, the supply valve |05 wi11 remain seated and release valve |09 unseated lin the selector Vvalve device 83, while in the selector valve device 82 the supply valve B5 will be opened and the release valve 86 closed in a position of the lever intermediate the neutral and stop positions, and this con'- dition of these valves will then be maintained in all positions of the operating lever to theleft (Fig. l) of the intermediate position in the ahead Zone. On the other hand when the operating lever |3| is turned from neutra position into theyastern zone, the supply valve 85 will remain seated and the release valve Bt open inthe selector valve device 82, while in the selector valve device 83 the release valve |09 will'be closed and the supply valve |05 opened, and this condition of these valves will be' maintained in al1 positions of the operating lever to thel right (Fig. 1) of the l'intermediate position inthe astern zone.l g g p n I The arm |52jwhich is pivoted on the iulcrum bar `|48 haslits freer end disposed between the peripheral surface'ofcam |25 and the head li of,` the adjusting 'screw "IB in the upper -endof plunger 50, Isaidffre'e :end beingfprovided oney side with a rounded surface v Zlithaving sliding contactwith the screwhead v4l In the opposite v side Aofthe free end vof arm `|52is a recess formed between two Vjaws 20| and in which is disposeda roller 202 mounted to roll on a pin 259' carried by said jaws. The lroller 202 is thus aligned for contact with the peripheral surface of cam' |26 and it is constantly maintained yin contact there with by the `pressure 'of spring 13 'applied through seat 14 to the 'extension 12 of plunger 5% and thus through the surface 200 .on arm '|52jto the .roller 20.2.

seat onthe depending portion 5l of the plunger 50 will be spaced from the release valve 4S a chosen distance due to the action of spring 68 on the stem 5B of said valve which maintains same in constant contact with the stem of the supy ply valve 44.

At one side of the recess 2&4 the cam |25 is provided with a surface 205 for contacting the roller 202 whileat the opposite side of the re'- cess is an identical surface 206 for contacting said roller, these two surfaces being arranged reverselyso that the surface 205 Will displace the roller 204 and thereby the plunger from normal position shown in Fig. 3 in a downwardly direction upon movement of the operating lever |3| from neutral position in to the ahead zone, While the surface 206 is provided to accomplish the same result upon movement of lever |3| in the opposite direction from neutral position into the asternf zone.

Referring particularly to surface 205. When the control lever |3| is turned into the ahead zone, this surface is arranged to move the depending portion 51 of the plunger 50 into engagement with the release valve 45 and to then actuate said valve to open the supply valve 44 to a certain extent by the time the operating handle attains the stop position. Further movement of the operating lever |3| from stop position to full position in the ahead zone will then provide gradually anv increased displacement of the plunger 5U in a downwardly direction.- Continued movement of thev operating lever from full to start position in the ahead zone will 'then provide still further downward movement of the plunger 50 and preferably of a greater degreev for the extent of lever movement than obtained between the "slow and full positions for corresponding movement of the operating lever. The end of surface 205 opposite recess '204 `joins an abrupt rise 201 formed substantially at the radius of roller 202 yand ywhich isV provided for contact with said roller in the start position of the operatinglever |3| for defining such position and preventing movement of said lever past same.

The portion of surface 205 eng-aged by roller 204' 'between the full and start positions is of such slope thatthe pressure of spring '19 applied through the roller 202 to said surface tends to return the lever |5| from the start position to thev yfull position. '5T-he purpose of this tendo automatically return'lever |3| from fstartlfposition to ful1`position upon removal of manual force from said lever and this may be obtained by the vsole action of either yof, springt?,

zone, said plunger will be displaced downwardly from its normal position to an extent dependent upon the position of the operating lever away from neutral position, the maximum displacement of said plunger being attained in the start position. f

Upon movement of lever I3| from fneutral position into the astern Zone the cam surface 28B and an abrupt rise 288 at the end of said surface opposite recess 284 is arranged to function identically to surface 285 and rise 201 upon movement of the operating lever |3I in the ahead zone as above described.

An inverted substantially U-shaped cover 2I extends between the end walls 'I and 8 with flanges 2| I overlapping the outer surfaces of said walls and from the base member 3 at one side of the device to the base member at the opposite side and is secured at opposite ends to said base member by cap screws 2I2 thereby fully enclosing the cams, levers, springs, and all other parts of the device disposed between the two walls of the base portion.

Operation In operation, let it be assumed that the supply pipe 'II is connected to any suitable source of fluid at a pressure such as eighty-five pounds per square inch as a result of which fluid at the same pressure will be effective in chamber 28 between the two diaphragms I4 and I6. Due to the fact that the opposing areas of diaphragms I4 and I8 are the same, the pressure of fluid in chamber 28 acting on one diaphragm will equal and balance that acting on the other diaphragm. Also let it be assumed that the operating lever ISI is in neutral position and that the adjusting screw l has been adjusted to allow, in said position, unseating of the release valve 46 with the control spring 38 fully expanded. As a result, chamber I I and thereby cavities 81 and |06 containing the supply valves 85 and |85 of the

selector valve devices

82 and 83 will be open to atmosphere past the release valve 46, spring seat 68, chamber 54 surrounding the extension 62 of plunger 52 and thence through port 58. With the operating lever I3I in its neutral position the supply valves 85 and |85 in both of the

selector valve devices

82 and 83 will be closed and the release valves 85 and |89 will be open so that both con` trol pipes 88 and |88 will be open to the atmosphere past said release valves and thence through ports 92 and I I I, respectively. p

Now let it be assumed that the operator moves the operating lever I3I to stop position in the ahead zone. This movement actuates the cam |24 and thereby the lever |49 to seat the release valve 8E and open the supply valve 85 in the selector valve device 82 to thereby connect pipe S8 to chamber II, while simultaneous operation of cam |25 allows the valves in the selector valve device 83 to remain in the position Shown in Figs.

5 and 6 in order to maintain the control pipe I 08 open to the atmosphere with the operating lever in ahead zone.. n

When the lever ISI is moved to the stop position just described the cam I 26 is operated to move plunger 5|] into seating engagement with the release valve 4G and to then move said valve to unseat the supply valve 44 to a slight extent. Fluid under pressure supplied to chamber 2|) between 'the two diaphragms then flows past the supply valve 44 to chamber II and thence past the supply valve85 in the selector valve device 82 to-the control -ppe 90 for increasing the pres-v sure therein above atmospheric pressure. At the same time as fluid is thus supplied through chamber II to pipe S8 it also ilows from said chamber through the stabilizing choke I5 to chamber I3 above the diaphragm I4 wherein the pressure increases substantially with the increase in pipe 9U. When the pressure thus obtained in chamber I3 and acting on the upper face of diaphragm I4 becomes increased to a sufficient degree to overcome spring 38, the .diaphragms I4 and I6 are deilected downwardly relative to the supply valve 44 and nally moves nut 28 into engagement with said valve for preventing further flow of uid under pressure to chambers II and I3 and pipe 90. The supply valve 44 is thus closed in a position of the diaphragms I4 and I6 and in a pressure condition of spring 38 determined by the extent of downward movement of said valve by the cam |25 and therefore `by the position of lever I3 i, and it may be assumed that this occurs when the pressure in chambers |I, I3, and pipe is increased to a degree such as ten pounds with the operating lever in the stop position.

If the lever is now moved from. stop position to slow position in the ahead zone the supply Valve 44 is displaced downwardly further and out of seating contact with nut 28 following which fluid will again flow from diaphragm chamber 28 to chamber II and thence to pipe 9|) and chamber I3. The consequent increase in pressure in chamber I3 will then move the diaphragm I4 downwardly to again cut-off the supply of fluid past the valve 44 when the pressure in pipe 80 is increased to a degree corresponding to the new position of the supply valve 44 as determined by the control lever ISI in the slow position.

If the operating lever i3| is now moved from the slow position to full position in the "ahead zone a corresponding further downward movement of the supply valve 44 away from the end of nut 28 will occur to allow further flow of fluid under pressure from chamber 28 to chamber ,il and thenceto pipe 95 and chamber I3 at the upper side of diaphragm I4 and as a result the diaphragm I4 will be deflected downwardly furtheragainst spring 38 and again cause seating of the nut 23y against the supply valve 44 when the pressure in said pipe is increased to the degree called for by the position of the operating lever. The pressure attained in pipe 95 in slow position of` lever I 3| may for instance be twenty pounds per square inch while that attained in full position may be of a degree such as sixty pounds. If instead of being moved to the full position the lever I3I is moved yto a position intermediate the slow and full positions, in the ahead zone, the correspondingdownward movement of .the supply. valve 44 will result ina corresponding less degree of pressure being attained in the control pipeA 5). Thus the pressure attained in pipe-,Qmayfby proper positioning of the control lever I3I between the slow and full positions inthe ahead Zone be limited to any desiredintermediate degree.

If the operating leveris now moved from full position to start position the supply valve 44 will again be unseated for increasing the pressure of fluid in pipe Si] which will cause further downward movement of the diaphragms. However, upon a slight downward movementof the diaphragms in response to this increase in pressure in chamber I3 the nut 35 on the end ofthe diaphragm connecting stem 2| will preferably engage the adjusting screw 36 and limit suchv full position toward f maintain pipek 90 open to 1 the selector valve devicev 83 will be operated to vopen pipe |08 be returned to full position by forces hereinbefore described and aided by the pressure 'oi fluid in chamber II acting in the plunger 50. Since lthe pressure in chamber i3 will initially1 holdthe 'diaphragme It' and 1E against movement by 'spring 33 uponsuch movement of lever isi, spring V41 vwill hold the supply valve 4t seated and the depending portion 51 of plunger 50 will therefore be moved by spring 'i3 and the pressure of fluid in chamber II acting o'n said plunger away from the release valve 4G which at Ythis time will be held against movement by spring 68. As a result, Iiuid under pressure will iiow from pipe 50 and chambers II and chamber I3 past 'the release valve 46 to the atmosphere. When the pressure of iiuid in chamber' It above diaphragm I4 is thus reduced sufficiently, the spring 38 will move the diaphragms Mfand I6 in an upwardly vdirection and through the supply valve 44 move the release valve 45 into 'seating engagement with the depending portion 51 of plunger 50 at the time 'the 'pressure of fluid in chamber I3 and pipe 90 becomes reduced to the degree (sixty pounds) called for with the operating lever I3I in the full position.

If the operating lever I3! is now returned from full to slow position the consequent upward movement of plunger 50 by spring 13 will again unseat the release valve 46 as a result of which the pressure in pipe 90 and in chamber I3 above the diaphragm I4 will again reduce past the release valve 46 and as this reduction takes place the diaphragm spring 33 will move the diaphragms I4 kand I6 upwardly to cause seating of` the release valve 4t at the time the pressure of fluid in pipe 90 and chamber I3 becomes reduced to the degree (twenty pounds) corresponding to the slow position of the operating lever. If the operatingrlever is returned only part way .from

slow position the presbe correspondingly reduced, as will be apparent. If the lever is now returned from slow position to stop position, the plunger 50 will again be moved away from the release valve 46 by spring 13 and the pressure of iiuid in pipe 90 and chamber I3 above the diaphragm i4 will then reduce and the spring 38 will actl through spring 41 to seat the release valve 4E when this pressure is Yreduced to the degree (ten pounds) determined by the position of the operating lever. V Return of the operating lever I3I to "neutraP position will permit plunger 50 to move to a valve 45 will remain open as shown in Fig. 3 and above described and also will eifect operation of the selector valve device 82 to open pipe 90 to atmosphere. f

On the other hand, if the operating lever I3I is moved from its neutra position into the astern zone, the selector valve device82 will the atmosphere while sure in pipe 00 will to chamber II, following which fluid will be supplied to said pipe ata pressure depending upon the position of the lever in the v astern zone and corresponding to the pressure yobtained vin the different like positions of said position in which the release as to receive latch 2I4 in neutral '14 1er/er in the ahead zone. Thus if the 'handle is moved -i'nto the astern 'Zone to stop position, a pressure such as ten pounds will be provided in the control pipe |08. A pressure such as twenty pounds-will be provided in pipe '|08 in the slow position, sixty pounds in the full position, any desired intermediate' degree of pressure between the fslow 'and fullf positions, and the maximum pressure of eighty-five `'pounds will be obtained in pipe |08 in the start position. The valve mechanism includingl Ithet fdiaphragms I4, Hi, supply valve 44, release valve 46, plunger 50, and cam |26, constituting what is commonly known as a self-lapping valve device, thus opertes the same for each direction of movement of the operating handlel i3! from lneutral position, the direction of movement of said handle, however, determining whu'ch of the pipes 90 or |08 is supplied with fluid provided by said mechanism.

In vorder to positively secure the operating lever liI against accidental movement out of neutral position I provide a latch 2I4 for securing the operating lever in neutral position. This latch is mounted between two jaws 2 I 5 projecting from the wall 8 and is pivotally carried by a pin 2I6 secured in the jaws. VThe member I3?. of the operating lever YI3I has an extended portion provided in its end with a recess 2 I1 so arranged Y 'position of the operating lever for thereby 'positively securing said lever against movement in either direction from neutral position.

The wall 8 back of the pivoted portion of lock 2M has a recess in which is slidably mounted a plunger 2I3 and which contains a spring 2I9 acting on said plunger urging same against Athe pivot-ed portion of the latch. The latch has two nat sides for engagement by the plunger 2I5, one for engagement with the latch when released from the operating lever I3I as shown in Fig. 2

' and the other for engagement when the latch 2I4 is disposed in the recess 2'I1 in said lever, engagement between the plunger 2I8 and either of the flat sides being arranged to hold the latch in either one position or the other and to oppose movement of the latch out of such position.

Summary From the above description it will now be seen Vin order to obtain positive control or positioningY of a device such as the maneuvering gear hereinb'efore referred to.

' shaft, a controlled memberA arranged Having now described my invention, what I claim as new and desire to secure by Letters Patent, is: y

l. A control 4device comprisingy a rockable shaft, a lquadrant arranged to turn with said shaft and having a plurality of spaced recesses arranged in an arc concentric with said shaft and corresponding in number and spacing to diff ferent positions of said shaft, means arranged to turn said shaft toits dierent positions, a detentv member arranged to enter one of said recesses in each different position of said shaft for defining said position, spring means acting on said detent member urging said detent member against said quadrant, a earn operable with said to be conurging said trolled by said cam, pressure means the surface controlled member against said cam,

of said cam, cooperating with said controlled member upon movement of said shaft beyond positions defined by the two end recesses in said quadrant, being arranged so that the pressure of said controlled member against said cam by said pressure means Will urge said shaft, cam and quadrant to the position dened .by interengagement of said detent member with the yadjacent recess in said quadrant. v

2. A control device comprising a rockable shaft, a quadrant arranged to turn With said shaft and having a plurality of spaced recesses included in an arc concentric With said shaft and corresponding in number and spacing to different positions of said shaft, means arranged to turn said shaft to its dierent positions, a detent member arranged to enter one of said recesses in each different position of said shaft for defining said position, Spring means acting on said detent member urging said detent member against said quadrant, a cam operable with said shaft, a controlled member controlled by said cam, pressure means urging said controlled member against said cam, said cam being arranged to cooperate with said controlled member in positions of said shaft `beyond the two end recesses in said arc to dene the last named positions of said shaft.

3. A control device comprising a rockable shaft, a vquadrant arranged to turn with said shaft and 116 having a plurality of spaced recesses arranged in an arc concentric with said shaft and corref Sponding in number and spacing to different positions of said shaft, means arranged to turn said shaft to its different positions, a detent member arranged to enter one of said recesses in each dilferent position of said shaft for denning said position, spring means acting on said detent member urging said detent member against said quadrant, one side Wall of each of the two end recesses in said arc being arranged so that in a position of said shaft beyond each ofsaid end recesses the pressure of said detent member against the said side Wall of the respective end recess Will urge said shaft back to the position defined by the adjacent end.y recess, a cam operable with said shaft, a controlled member controlled by said cam, pressure means urging said controlled member against said cam, said cam` comprising means arranged to cooperate with said controlled member in the said positions of said shaft beyond the said end recesses to dene the last named positions of said shaft, and other means operable to render said pressure means effective on said controlled member, in cooperation with the pressure of said spring applied through said detent member to said quadrant to urge said shaft back to the position dened by the adjacent end recess. 1

' CECIL S. KELLEY`