US1211646A - Locomotive-drifting-valve mechanism. - Google Patents

Description

H. S. VINCENT & J. L; MOHUN. Locomorwi ummm; VALVE MEcHAmsM.

APPLICAT-OK FILED AUG. 19. 1916.

41,21 1,646. i Patented Jan. 9, i917.

5' SHESTS-SHEET I.

H. s. 'VINCENT a, 1. L. MoHuN.

LOCMOTIVE DRIFTING VALVE MECHANISM.

hPPLlCATlDIl HLEQ AUG. 19| lQIB.

1,21 1,646. Patented Jan. 9,1917.

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H. S. VINCENT l. L. MOHUN.

LOCOMOTWE DBIFTING V4LVE MECHANISM. APPucmon mw Amma. ma.

1,21 1,646. Patented Jan. 9,1917.

WITNESSES H. S.,VINCENT 91.1. MOHUN. `Locomnwe ummm; vALvE Mscmmsm.

y 1,646. APPLICATION FILED AUG. 19. 191B. Jan. 9,

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WITNESSES H. S. ViNCENT & J. L. MOHUN.

LocoMoTlvE DmfTlNG vALvE MEcHAmsM.

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Patented Jan. 9,1917.

5 SHEETS-SHEET 5.

APPLICATION FILED AUG. I9 ISIS.

n sn A 1: mno ummm nr UNITED STATES HARRY B. VINCENT, OF RIDGEWOOD,

Spcoication of Letters Patent.

PATENT OFFICE.

NEW JERSEY, AND JOHN L. MOHUN, OF BROOKLYN,

NEW YORK.

LOCOMOTIVEJJRIFTING-VALVE MECHANISM.

Patented J an. 9, 1917.

Appliation led August 19, 1916. Serial No. 115,782.

lowing is a specification.

Our invention relates to valve mechanism for automatically effecting the admission of a limited quantity of steam, directly from the boilerrto the valve chests and c vlindcrs ot' a locomotive engine, during the periods in which the locomotive is drifting, or running with its throttle valve closed, in order to prevent the formation ot' a vacuum in the cylinders, to afford proper lubrication to the cylinders, and to prevent the carbonization of oil therein.

In a separate application for Letters Patent filed by ns ot' even date, herewith, Ser. No. 115781, we have set forth a drifting Valve mechanism of the type above specified.

thel leading and characteristic feature of wh1ch consists in a valve which controls the supply of a limited quantity ofsteam to a disp tribution valvevchest and cylinder of ar locomotive, when running with its throttle closed and which is alternately opened and closed by positive connection with a moving member of a locomotive, and means, interposed between said valve and cylinder, for

alternatel)v effecting the admission of steam to, and its exclusion from, the cylinder. Our present invention likewise embodies this feature, and its object is to provide a driftmg valve mechanism which will attain the 4o advantages of that of our application Ser.

No. 115781 aforesaid, as well as that of rendering the major portion of the mechanism inoperative when the locomotive is working under normal conditions, in order to reduce wear to a minimum.

The improvement claimed is hereinafter fullyv4 set forth.

ln the accompanying drawings: Figure l is a side view. in elevation, of the. forward portion of a locomotive engine, illustrating an application of our invention; Fig. F. a front view. partly in section. of the same; Fig. 2a. a longitudinal section, through an intcrccpting reservoir; Fig. 3, a view. partly7 .55 in elevation and pai-tlgY in vertical central section, of a drifting valve casing; and its accessories; I `igs. 4 and 5, transverse sections. on the lines a a and L, respectively, of Fig. 3; Fig. 6, a vertical section through a drifting valve casing, illustrating a 'structural modification, ,on the line c c of Fig. 7; Fig. 7, a similar section, on the line rl d of Fig. fi; Fig. 8, a similar section, on the line c c of Fig. 7 Fig. 9, a horizontal section, on

, the. lino f' f of Fig. 7; Fig. 10, a iront View,

in elevation, of the operating arm and gear connections; Fig. 11, a View, half in front elevation and half in vertical .section on the line vf/-f/ of Fig. 12, through aV drifting valve casing, illustrating a further structural modification; Fig. 12, a vertical section through the same, on the line ri of Fig. 11; Fig. 13, a transverse section, on the line z' z' of Fig. 4. showing the bearing 18"; and, Fig. 14, an axial section through the shut oil i/alve casing. In the practice of our invention, referring descriptivcly to tho specific embodiment thereof' which is exemplified in Figs. 1 to 5 inclusive. two intercepting reservoirs, 14,'a1'e provided, one of said reservoirs and one drifting valve chest, l, for each of the' distribution valve chests,` 2, of the locomotive, which communicate by ports (not shown) with'the cylinders, 13,` in the usual manner. The intercepting reservoirs and the drifting valve chests, and their connections and contained mechanism, being similar, in all particulars of construction and operation, the description of those located on one sideof the locomotive will beunderstood as being equally applicable to those on the other side.

An intercepting reservoir, 14, and a dritting valve casing, 1, arc located in any convenient position adjacent to one of the distribution valve chests, i? both being, in this instance, shown as connected to and supported by a vertical bra cket, 15, secured to a flange on the valve stem. lide, 2d. The interoepting reservoir, 14, W ich is of cylindrical form, is divided, by ya transverse partition. 11a, into two separate chambers, 14.b and 1i. which are connected bypipes, 14'Jb and 14C, respectively, with the upper horizontal portion oi the drifting valve casing, 1, which is of T form. Drifting valves. 7, which, in this instance, are, of the piston type. are. fitted in bushings, 1", in the upper horizontal portion of the drifting Valve casing. the ends of which are closed by remov- 4 14, is, as

able heads, 1', said pistons being connected by an integral intermediate bridge piece, 7 a, and the lower end of the casing is closed by a removable head, 1. Saturated steam from the boiler is supplied to the casing through a drifting valve supply pipe, 9, leading into a longitudinal passage, l, formed on the upper horizontal portion of the casing, the ends of which passage open into annular passages, 1k, in the upper portion of the casing, adjacent to its ends. v

The purpose of the intercepting reservoir,

in the construction of our application Ser. No. 115,781to measure out from each of its chambers, adefinite quantity of steamV for delivery to the adjacent engine cylinder, the drifting valve operating so that one chamber of each reservoir is in communication with the cylinder at any given time, and, when'in such communication, not communicating with the steam supply.

he drifting valve supply pipes of the casings on both sides of the locomotive, lead tothe casing, 10, of an automatic shut off valve, from which casing a pipe, 9b, controlled bya manually operated angle valve, 9", which is open continuously during the operation of the locomotive, leads to the steam space of the locomotive boiler, 11. The Shut off valve casing, 10, incluses a rdifferential piston `valve mechanism by which the. admission of saturated steam-through the pipe, 9", to the drifting valve supply pipes, is automatically effected and maintained whenever, and so long as, the throttle valve of the locomotive 1s and remains closed, and is cut off Whenever, and as long as, said valve is and remains opened. It will, of course, be understood that the admission of steam to the su erheater header, 12, with which the shut o cates, and which communicates with the main steam supply pipe, 12, and the outside steam pipes, 4, is controlled -by a throttle valve, 1n the ordinary manner. The shut off valve mechanism, which is illustrated in y Fig. 14, does, in and of itself not form part of our present invention, and being, moreover, fully described and shown in our application Ser. No. 115781 aforesaid, it will not be herein in detail set forth.

The drifting valve supply pipe, 9, communicates through the passages, 1k and 1k", and through ports, 1f, in the bushings, 1, with the interior of said bushings, and communication is established between the interior of the bushings and the pipes, 14N and 14, leading to the chambers of the intercepting reservoir` 414, through ports, 1, formed in the bushings, when said ports are opened by the drifting valves. A drifting vdelivery steam pipe, 3, leads from the space within the casing, 1. between the drifting valves, 7, into the distribution valve chest,

valve communithrough a connection with the outside steam pi e, 4, which supplies said chest.

eciprocating movement is imparted to the drifting valves, for controlling the por ts, l, by a vibrator operating shaft, 17, which is journaled in earings in the lower poi'- tion of the casing, and carries an arm, 16, having, on its upper end, a cylindrical bearing, 16", engaging a recess, 7b, at the middle of the length of the bridge piece, 7, which connects the drifting valves. A set screw, 7, engaging the casing, 1, and entering a longitudinal groove in the bridge piece,prevents the drifting valves from turning in the bushings. Springs, 7e, interposed be-l tween the drifting valves and the casing heads, 1m, serve to return the drifting valves to the normal central position shown in Fig. 3, when they are not in operation, and drain pipes, 1h and 1, lead from the casing to suitable points of discharge.

A special novel `and advantageous feature of our invention consists in means for rendering the major portion of the mechanism inoperative when the locomotive is Working under normal conditions, z'. e., running with open throttle, and thereby reducing wear to a minimum. To this end, the operating shaft is provided with an automatically o erable clutch mechanism which will now e described. The operating shaft, 17, carries on one of its ends, a clutch collar, 17, which engages an adjoining clutch socket, 18, formed on the upper end of an arm, 18and fitted freely on the operating shaft, adjacent to a bearing, 19, on a bracket, 19, bolted to the drifting valve case, the outer end of the operating shaft being journaled in said bearing. Longitudinal movement of the. clutch socket and arm, 18, relatively to the operating shaft, is prevented by a segmental bearing, 18", on the clutch socket, which abuts against a projection on the bracket, 19. The opposite end of the operating shaft carries a piston, 20, fitted in a casing, 1", which projects flaterally from the drifting valve casing, 1, and is closed ,at its outer end, by a removable head, 1. A spring, 21, is fitted in a case, 21, which enters the casing, 1P, and is secured thereto by the head, l', said spring bearing on the outer side of the piston, 20, and acting to maintain the clutch sections, 17L and 18a, in engagement during the periods in which the locomotive is drift- Y ing. A port, 1s, leads from the casing 1P, on the inner side of the piston, 20, to the interior of the casing, 1, within which it is continuously open to the distribution valve chest, 2, through the ld rifting delivery steam pipe, 3. Vibratory movement is imparted to the arm, 1S, and, thrbiighlsaid arm to the operating shaft, 17, when the locomotive is. drifting, by a connection with a moving member of the locomotive. In the instaure` shown, the arm, 18, is coupled to the lower minets pin, 22', of the combination lever, 22, of the valve ear, by links, 22 and 22.

In t ie operation of a locomotive on which thc invention is applied, saturated Steam IS supplied by the automatic operation of tho shut oft valve, to the driftin valve supply pipes, 9, immediately upon he closure of the throttle valve and the consequent drifting operation of thc locomotive. T he Stoom passes through the pipes, l); enters euch of the drifting valve cusings on thc outer sides of the piston vulves, 7, 7, thereof' and by the reciprocation -of Said valves, e acted bly the rouncctions described, is admitted, c tornate] through the passagers, l and l, ports, l und pipcu, 14 und 14", to one and thc otllil 0f the clinnibtl, li" Imtl 14:, Of thv iutcrcepting reservoir, 1i, connected with thev drifting valve casing. From Said chambers, it panics, through thc porta, l", thc` iutrrior of the casing. and the drifting 'lolivcigv steam pipe, 8, to the fuliuout distrihution valve chest, 2, The admission of Huturairil airain time effected, continuer throughout ihr period in which tho looomo1 tiro is' drifting. unil as soon as the throttlo is rropcnoil for normal operation, it is trmi: natcil In' tho rlulll'opf thc. drifting Sllpgly pi )es by thc automatic operation of the s ut u ralrr. 'ihr luorcmrutof the drifting vulve piatout ieuleo Stopped, upon the clo= miro o tho throttle. In the ilioengagoment of thu clutch mruihera of tho operating @haft as described. and the drifting valve pistone are brought to their middle positions by the springs, Tf", 'hon thcl locomotiye. is gtapd: ingr, no ,sat-uriltcfl stoom will bc admittod to the distribution valve chests, by reason of the drifting vulves heilig stationary, in pogif tion to intorccpt communication between the pipes, 9 andV 3. and consequently to retient the passagc of steam through the tiiiifting valve ratingss Fi s. tito lll inclusive illustrate a ,struck turnlgrnodification, the operation of'which ig alinlarto that of the construction first ilciarriherl, hut 'iu which the drifting voltea are four in numhcnand are of the puppet typo, and two coincidenti;T movable operat-v ing Vtihtifts are applied. Each of the drifting valrc ratings. 1, is divided by a transverse partition. 1, into an upper chamber, 1", and a flower'chamber, 1c, which communicate, respectively, through pipes, 14"" and 14"", with the chambers. 14 and 14", of

the interceptionr reservoir, 14. Two inlet` chambers, 1, and two opposite outlet chambers, 1l, 'are formeil on the casing. the inlet chamber@ communication wltlithe drifting lll lilllilllll lw il thIOllg'li a passage, l, un` theV out e with the 'drifting' delivery Steam' pipe, 3, through a 'pasaagrc". 1"; VThe inlet chambers, 1*.; commiiniratc 'with [the leasing chalutiers, 1" uml 1,.thro'ugi1 openings controlled by ing throuph a chambers communicating drifting supply valves, 7'. il the puppet typo, und thc outlct eluuuhrrs` l,`communi ou o with the casing Chambers. l" and 1, through openings controlled hy drilling de4 lirory vulves, 7, similar to thiI drifting sup ply valves. `The stema of tlnI supply and ilolivcr vulves carri pistons, woriong in busi ingu. l, .fitto in tho inlet und outlet chambers, tbe outer ends ot' which are dosed by removable heads, 1". Springs, 7*, are. iutcrpooocl between the pistons, and the heads of the chambers, to effect tho stating of the valves, and to insure the seutlno ot the vulves, 7E, of the outlet chambers, their pistons are eubiect to resaure from the ohiimbers h auf la, of tic casing, through porte, 1, ,loading from said chambers to the outer sides of the pistons, as shownin Fig, 9.

A ribratory operating shaft, 157, journaled in the loworportiuu of the casing, 1, ocrrics un arm, 17, which projects downward between, and it adapted to alternately unseat, the lower supply valve, 7', and the o ipoaite delivery valve, 7. A segment gear, l c, fixed on the operating shaftfengages a eimilar shaft, 2 which is journaled in the casing, above und parallel with the shaft 17, and has secured upon it, an arm, 23", which )rojootsupward v between, and is adapte1 to alternately actuate, the uppersupply valve, it, and the oppoeite delivery rn e, 7S. It will he Soru that hv thin oonetructiou, a eup- Ply Vult@ und a fclivcry valve are coincident-lil' @Pont-id, tendmit steam to one of the Chambers ot the intercepting reservoir, and lle-NW1 it from the othor, by the movement of the operating shaft. 17, in one direction, anni a sup ily valve and a delivery valve are @illtlitlllli 'Y lllofl for a similarpurpose` The drifting valves are rendered inactive during tho periods that the locomotive is runnin under normal conditions, by'oluten acechan Sm :similar to that shown inv Figs. 3 and 4,' and previously described.' The arm,

13, which is freely mounted on the operating' Shaft. und through which motion is imparti ed thereto, carries. n clutch socket. l8r, which engagea a clutch collar.l 1i, on the operating Sliiifhwliicii 1S moved in its hearings in one direction, toengage the clutch collar and 95?, 23, outa secondary operatingl rlutch socket. by a glaring, 21, when the throttle is fineco, and iti mcveifl in the 'opposite direction. to distinguir@ the collar' and Socket. when th@ throttle is opened,rby `pressure from the distribution valvechest, actport` l` on a piston, 2Q, .securgd on tie operating shat.

The operatie of the modified form of the appliarwelast iibore described is similar to' thatoi:l the construction first described`,the admlsslon of saturated Steam, through interposed intel-relating reerroirs. to thezrii-v tribution ialre chests', durng the periodfof iso driftingbeing effected by the movements in full detail. The preliminary operating of the drifting valves, and the drifting valvesQbein rendered inoperative by similar mechaii in, when' the locomotive is running withopen throttle.

s A fui'ther-striictural modification of thev invention in which the drifting valves are of the oscillatory slide type, is illustrated in Figs. 11 and. 12. The drifting valve casi ingis, in .this modification, formed in two `1o sections, 1 and .1, which' are connected by bolts, 1V". Thainer' end,wall, 1hh, of the section, 1, "'forlns a partition .between the sections and thesection, 1, is divided'by aY are formedin the wall, 1h, whiohseparates the chambers,1 and 1", of the'casing section, L, froii the chambers, 1, o f the' section, 1, and communication between the chambers, 19 and l, an'd the chambers, 1, is eontrolledby drifting valves, 24, of the oscillatory slide type, one vof which is fitted in each of the chambers, 1 andwhich are provided 'with' ports, 243, adapted to register, in certain posit'ons of the valves, with the wall ports, 1". he drifting valves, 24, are. heldto theirI seats on the wall, J111, by a spring, 24", and are secured, respectively, on a preliminary operatin shaft, 17, anda 40 secon ary operating sha t, 23, which are n journaled im the wall, 1h, and in the opp ite wall of the casing section 1, andy extend outwiirdly, through suitable stuilng boxes in the latter wall.

They driftingvalves and their operating shafts are adapted to be rendered inoperative when Vthe locomotivegis runningwith open throttle, by clutch mechanism, which is similar Vto that" before described,` and 'which will not therefore be'again set forth shaft, 17, is vibrated by an arm, 18, connected-with a reciproca'tn member'of the locomotive, and is couple by allink, 18", with an arm, 23i on thesecondary 'operatin shaft, 23. 'hearms, 18 and 23d, 4are fitte freely on the. respective shafts,' and carry clutch-collars, 1,8' and 23, respectively, engaging. clutch` Sockets, 17"fixed fon the through ports, 1',.- leading out of the cham` bers, l, when the locomotive is runnin ply pipe; means for actuating said valve vby positive connections to a movin member of a locomotive; and automatica y operative 'means for disconnecting said` valve and movshafts. The inner ends "of the shafts carry pistons, 20, whichere acted upon by pres-v sure 'fromA the distribution valve chests,l

. minste and 23,1ongtudinally, and thereby disengage the clutch members and stop the Inove-v ment of the `shafts'and valves. Upon'the closure ofthe throttle, pressure'on the .pistons, Q0," isreleased', ,and the shafts are moved longitudinally to rengage the .clutch members and reintate the movemcntsof the shafts and -d'riftin valves.

The operation o the modification shown in Figs, i1 mid 12, is similar thatptrthe constructions shown -in vthe ures, and before described. Saturated is continuously admitted, while the Aiipperchamber, 19, ofthe-'casing soci tion, 1*?, and thence, alternately, .to one andthe other ofthe chambers, 19.', of the' section,1,l rom which it passes tothe chambers of the interceptin reservoir, 14. vFrom these it is delivered, y .tliemovements ofthedrifting, valves', to the lower chamber, 35 1d, and-thence passes, throu h the drifting delivery steam pipe, 3, to t e distribution valve chests. A We claim as our invention and desireito secure by .Letters Patent: 1. In a drifting valve mechanism for locomotives, the combination vof a 'valve controlling the admission of steam to a locomotive cylinder, of a throttle governed supmeans for Idisconnecting said valve and moving member, during theperiods in which the locomotive is running under the normal condition of steam admission throughthel supply pipe.. n

2. In a drifting ,valve mechanism for locomotives, the combination of a rvalve controlling the admission of steam to a loco- 'motive cylinder, of a throttle governed supply pipe; means for actuating said valve by positive connections to a movin member of a locomotive; and automatical y opera.-l tive means for disconnecting said'valve and moving member, upon and byitlie 'opening of the throttle valve of the supplypipe.

' 3. In a driftingvalve mechanisinffor locomotives, the combination of a valvecontrollin the admission of steam to a locomotive cy inder, of a throttle governed supply pipe; means for actuating said valve by 'positiveconnections to a movin member of a locomotive; and automatica y operable ing member, upon an by the openin 'of thetlirottle valveofthe supply pipe an 'Ife-A ms'tating' `its operation, upon and .bythe4 closure of saidxvalve. l a 4.*In adriftin' valve mechanism forflocomotives, tliecomA inationof a valve1001115101-` ling the admission of stearato a locomotive cylinder, independently of a -gov' ernedsupply pi e means foraetum 'said q valve'bya moviiigmember of a 130 ioo ` ton which is actuated b motives, the com -motives, the com tween the locomotive boiler and automatically operative clutch mechanism for engaging said valve with, and disengagin it from, its actuating means, upon and by t e closure and o ening, respectively, of the throttle valve of t e supply pi e.

5. In a driftin motives, the com ination of a valve controlling the admission of steam to a locomotive cylinder, independently of a throttle governed supply pipe; means for actuating said valve by a moving member of a locomotive; a. clutch mechanism interposed between said valve and its actuatin mechanism; a piscylinder pressure to effect the disengagement of the clutch members upon the opening of the throttle valve of the supply pipe; and a sprin theclutch members areA engage upon the closure of said valve.

6. In a. driftin valve mechanism for locoination of a double chambered intercepting reservoir; an independent drifting valve casing communicating therewith, with the steam s ace of a locomotive boilerz and with a ocomotive cylinder; two'drlfting valves fitted in said casing, each controlling communication, alternately, between the locomotive boiler and one of the chambers of the intercepting reservoir and between said chamber and the cylinder; and means for actuating said valves by a moving member of a locomotive.

7. In a driftin 'valve mechanism for locoination of a double chambered intercepting reservoir; an independent drifting valve casing communicating therewith, with the steam space of a locomotive boiler,

valves fitted in said casing, each alternately, beand one of the chambers of the intercepting reservoir and betweensaid chamber and the cylinder; and connections cou lin said valves to a moving member of the distribution valve gear of the locomotive. f

8. In a driftin valve mechanism for locomotives, the com ination of a double chamber-ed intercepting reservoir; an independent drifting valve casing communicating therewith, with the steam space of a locomotive boiler, and with a locomotive cylinder; two drifting valves fitted in said casin each controlling communication, alternate y, between the locomotive boiler and one of the control ing communication,

chambers of the intercepting reservoir and between said chamber and the cylinder; means for actuating said valves by a. moving 00pm o! this patent may he obtained for ave cents nach, by addressing the Valve mechanism or locoby which and with a locomotive cylinder; two' member of a locomotive; and means for rendering said valves inoperative during the periods in which the locomotive is. running underthe normal condition of steam admission throu h the sup `ly pipe. p

9. In a riftin va ve mechanism for locomotives, the com ination of a drifting valve casing, communicatin with connections, eac leading to an intel'- cepting reservoir chamber and communieating, intermediate thereo with a connection leading to a locomotive cylinder; 'a boiler steam supply pipe; two connected drifting valves, fitted to reciprocate in the casing, each controlling communication, alternately, between the boiler steam supply pipe and one of the reservoir chamber connections, and between the cylinder connection; a vibratory operating shaft journaled in the casing; an arm tween the boiler steam supply pipe and one' ofthe reservoir chamber connections and between said connection and the cylinder connection; a vibratory operating shaft, journaled, with the capacity of longitudinal movement, in the casing; an arm connected to said shaft and coupled to the drifting' valves; an operating arm fitted freely on said shaft and adapted for connection toaa clutch moving member of the locomotive; member lixed on said arm; a clutch member fixed on the operating shaft and adapted to engage the clutch member of the operating arm; a piston fixed on the o erating shaft a4 port leading from the cylind) thecasing to one side of said piston; and a spring bearing on the opposite sideof said piston.

HARRY S. VINCENT.' J OHN L. MOHUN.

Witnesses:

G. W. MiNoUs, F. P. MoNAni.

cmmmmn d: hun,

wllhinzton. D. 0."

adjacent to its ends,-

said connection and y er connection of

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