US913003A - Apparatus for governing steam-turbines. - Google Patents

Description

H. I'. FULLAGAR. APPARATUS Fon Govlmmr'm STEAM TURBINBS.

APPLICATION FILED JULY 24, 1905.

Patented P91123, 1909.

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91 3,003. Patented Feb. 23, 1909.

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APPABATUS F011 GovBRNING STEAM TURBINBS. APPLIUATIONI'ILBD JULY 24, 1905.

91 3,003. Patented Feb. 23, 1909.

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CHALMERS COMPANY, OF MILWA UliIE, WISGONSI N APPARATUS FOR GOVERNING STEAM-TURBINES.

Specification of Letters Patent.

Patented Feb. 23, 1909.

Application led July 24, 1905, Serial No. 270,934.

Ib all fui/1,0m it may concern:

Be it known that I, HUGH IiiiiiNois FUL- LAGAR, a subject of the King of Great Britain and Ireland, residing at N ewcastle-uponv of Tyne, in the count Northumberland,

England, have invented Improvements in or Relating to Apparatus for Gov erning Steam- Turbines and other Steam-Engines, of which the following is a specification.

In steam turbines and other engines, es-

pecially when amount of force is of large size, a considerable necessary to move the main regulating valve by which the supply of steam to the engine is controlle come the friction of the the mechanism used for operat d and to overvalve itself and of ing it. Moreover, as there is a difficulty in exactly balancing the steam pressure positions thereof, it is on the valve in all important that the valve, especiallv when it is nearly closed,

should be rm y controlled.

Furthermore it is usually desirable in the case of a steam turbine, to provide regulating valve by which live admitted to a second inlet of order that additional power duced, when desired, for enabli a second or auxiliary steam can be the turbine in may be prong the turbine to deal either with an overload, or to meet a fall in the pressure of the stea the turbine. Such an m supplied to auxiliary valve usually requires to be loaded, as by means of a spring or weight, to keep it steam tight when not in use, and it therefore requires considerable power is therefore a difficulty valve directly by means ordinary of such a tions of speed. A

to operate and control it.

in operating such a of a governor of the type on account of the small power governor, especially for small variasteam relay, under the There control of the governor, is therefore sometimes employed to operate the valve, or the two valves in due succession, such steam relay being capable of being controlled by a governor of small dimensions. ever been found in ractice operated relay is liab e and become inoperative ling valve, which is operated becoming incrusted or corrode posited by owing It has howthat a steam occasionally to stick to its controlby the governor,

d by scale dethe steam escaping through the relay, so that such a relay -requires to be properly.

to insure its work- In steam turbines and other steam engines used for driving dynamos, it is of great importance that the governing arrangements should be reliable for long periods without attention, and should enable a close regulation to be obtained, and this invention has for object to provide governing apparatus designed to enable these results to be attained. .F or this purpose in governing apparatus according thereto there is employed in connection with an engine governor, the main steam regulating valve, or main and auxiliary steam regulating valves, of the steam turbine or other engine, (hereinafter called the turbine), and the means used for directly actuating the said valve or valves, a relay comprising a liquid pressure motor adapted to be operated in one direction by liquid under pressure, preferably oil, that is not liable to cause corrosion of the working parts, and in the opposite direction by gravity, or by a spring, or by both gravity and a spring, a valve (hereinafter ca led the controlling valve) for controlling the admission and exhaust of liquid (liereinafter called oil) to and from the motor and which normally closes the oil supply and exhaust ports or passages to and from the relay motor, and means comprising for example a floating lever or equivalent device or mechanism whereby the controlling valve is connected to the governor and to the relay motor so as to be subject to the joint but reversely acting influences of both of these parts, the arrangement being such that when the speed of the turbine falls below or rises above the predetermined normal speed, the valve will be moved by the governor from its normal closed position so as to place the motor in communication respectively with the oil supply under pressure, or with the exhaust, whereby the motor will be caused to immediately move the steam regulating valve or valves to a corresponding extent so as to partially open it or them or close it or them to a further extent, and will simultaneously return the controlling valve to its normal closed position. Thus, while the controlling valve is being moved in one or other direcl tion by the governor it will he simultane- Iously moved in the opposite direction by the motor, and will be caused to resume its normal closed position immediately after the governor ceases to move it so as to quickl f bring the motor and steam regulating va ve or valves to rest when the required regulation in the steam supply to the turbine has been made. Governing apparatus to l aet in the manner deseribed ean be rond reetn l ed in various l'orins.

rlhe invention l'nrlher eonsists in ille various novel features oll ronstrln'tion and in the eonlbinalions and alianpfenients oi par ts all as hereinafter ino! e partirnlarly desmhed and pointed out in the elaiins.

ln the aeeoinpanying illustrative draw ings, Figures l, 2 and I show a. portion nl' a steani turbine with governing apparato ae eording to this invention applied thereto, Fig. l being a side elevation partly in seetion on the line il .il ol Fig. Fig'. 2 a plan, and Fig. 3 an end elevation partly in vertical seetion on the line B B of Fig'. Fig. l is a eentral vertieal seetion of an oil relay eylinde, and Fig. 5 a horizontal seetion thereof on the line (l of Fig. 4. Figs. (i and 7 are vertieal sections, taken at right angles to one another, showing one construction of controlling valve, and Figs. 8 and 9 are seetions taken on the lines D D and E E respon .tively of Figs. 6 and 7. Fig. l() is a seetional elevation showing a niodiiied eonstriu'tion of eontrolling valve eoinbined v, ith a governor and relay lever.

ln the arrangement shown in Figs. l to i? inclusive, the relay inotor eonlrrises a veitioally arranged cylinder a' that is iitted with a piston Z1 and is in connuunieation at its lower end through a branch e with an oil supply and exhaust pipe or passage d that is connected to the easing e ol' the eontrolling valve.v The piston is provided 'with an u wardly extending rodj' the upper end ot w ich is connected at g to one end of a valve operating lever z` that is pivoted at its other end to a bearing 7n on a stationary part ol' the easing of the turbine The lever it is connected at an intermediate part ol its length to the main regulating valve o ol' the turbine which is loeated'in a steam ehest p over which the said lever extends. q (Figs. 6 and T) is the controlling valve ot the relay motor. lt is of piston type mounted to slide vertically in its valve easing e and to control an annular port r, or it may be an annular set of ports, communicating with an annular passage s that is in eon'nnunieation through a braneh t with the oil supply and exhaust pi e or passage d leading to thel relay eylinder o. The eontrollnrgr valve f] is made of a depth corresponding, or approximately so, to that of the port r, and, when l this port is of annular shape, as is prel'erred i and as shown, the said valve is provided at I its periphery with upwardly extending ribs or lugs u that serve to guide it vertically and prevent it entering the port. The controlling valve g is connected by a rod u to a balanelngpiston w arranged to slide in the valve case e above it and, through the said piston, is connected to a valve operating! rod 1, the valve case e being provided at a l point between the eontrolling valve q and iis balnneing piston 'in with an oil inlet openinel 2 eonnreti' d to the oil pump Si (Fig, ol' the oil fireniating systein so that the oil will tlow tween the valve and its balaneing piston and these parts will be in erplililn'inin. lire vaive rod l is eonneeted to an inter mediate portion oll a normally horizontal lloating' lever "l one end ot wlliell is lorlied and arranged to engage the sliding grooved voltar er sleeve ."3 ol' the turbine governor ti r. bieb may be ot the Hartung type, and the other end pl' n hieh is jointed, as b v a linli T, to the tree end ot a normallyY horizontal lever arin u'hieh is suitably eonneeted to the piston t ol the relay lnotor e, b as by li1.ing its other end upon one end ol' a horizontal roel; shaft (l mounted in suitable bearings lo and to the other end ot which is li.\ed a similarly arranged lever arni l1 the tree end ol vvhieh jointed at 11' to the piston rod f ol' the relay niotor n t).

The operation ot the arrangement deseribed is as Vl'ollowsVillain one end oll the floating` lever l is inovedin one or other direction by the governor (i to inove the eontrolling valve r] l'roin its normal Closed position and supply oil under pressure to or allov.V oil to exhaust l'roin the relay e'vlinder i and thereby arise or allow the piston b ot the relay inotor to inove the niain valve operating;l lever a and inain regulating valve o in one or other direetion, the said piston .vill, through the eonneeting nieehanisni described, canse the other end oll the said lloating lever to inove in the reverse direotion and so canse the said controlling valve lo nieve bael; towards its norinal Closed position whieh it will resume when the floating lever ceases to be 'further nioved by the governor, the valve operating lever t and inain regulating valve o then remaining in the positions into which they have been inoved until the controlling valve q is again operated by the governor. Oil that leaks past the motor piston which may be without packing rings, may be caused to tlow to an oil exhaust pipe or direet into a reeeptaele 11% through a hole 14 formed in the wall ot the motor cylinder above the piston. Oil that leaks past the balaneing piston 'w ot the eontrolling valve, both of whieh parts inay be witl'iout packing rings, inay be led through a hole l5 in the piston and valve to an exhaust branch pipe 1G into which oil exhausts from the inotor eylinder when the eontrolling valve q is lnoved up ward l'roin its normal closed position.

ln the niodi'lied arrangement shown in Fig. l0, the controlling valve is made as a eoInpound valve Comprising a inain inner piston valve q1 and an' outer tubular eut-ofi' valve g2 easing e and control the communication between the relay motor a-) and the oil supply and exhaust passages 2 and 16 respectivelv. The piston valve q1 is provided with a ba ancing piston w as before, and is connected to the sliding collar 5a or equivalent part of the governor 6a, as for example through an endwise movable rod 18 that may extend downward through the governor driving shaft 19 and is connected at its lower end either directly, as through a swivel coupling 18a, or indirectly through suitable connecting means, as for exam le a lever, to the rod 1 u of the main piston va ve q1 so that endwise movement of the collar 5a will be transmitted either directly, or indirectly to the said piston valve. The cut-off valve q2 is formed with ports 2U that are adjacent to the main piston valve q1 and to the annular port r (or ports) in the valve easing e communicating with the motor cylinder, the main and cut-ofi' valves being normally in the relative positions shown so that the main valve q1 closes the ports 20 in the cut-ofi1 valve. The cut ofi' valve g2 is also formed with holes 22a to allow oil to pass to its interior from the oil supply branch 2. The compound controlling valve is connected to the iston of the relay motor through suitab e o erating mechanism acting substantially lire that used for the controlling valve in the arrangement of governing apparatus hereinbefore described with reference to Figs. 1 to 9 inelusive, and comprising for example a lever 22 one end of which is connected to the motor iston rod and the other end of which may be orked and connected to pins 23 on the cut off valve q2. The arrangement is such that when the main piston valve q1 is moved by the governor 6a to open the ports 20 in the eut off valve q2 and place the relay motor either in communication with the oil supply 2, or with the exhaust 16, according as the speed of the turbine falls below or rises above t e normal, the cut-off valve q2 will be moved in the same direction by the relay motor so as to bring the iston valve q and cut-off valve q2 into their original relative positions and close the communication between the relay motor and the oil sup ly 2, or exhaust 16, and cause the piston o the relay motor and attached parts to remain in the ositions into which they have been moved or regulating the supply of steam to the turbine until the governor 6 again acts to operate the main piston valve q1.

When a loaded auxiliary steam re ulating valve 24 (Fig. l) is required to be use for the purpose hereinbefore set forth, it may, as shown, advantageously be arranged to be operated from a part of the main valve operating lever h located between the pivoted end 1c of such lever and the point of attachment 25 thereto of the main regulating valve o so that a relay motor of comparatively small size and using only a small quantity of oil will suffice to lift such valve even when heavily loaded, as in the example by a pair of springs 26 acting upon the valve rol 27 The valvr` fgxieratthrough a yolre piece 2S.

ing lever' 7L may comprise shown in g. o, two bars held together at a distance apart by distance ieces 29 and arranged to embrace flanged sleeves 3() and 31| or equivalent devices, on the rods 32 and 27 res )ectively of the two regulating valves o and 24 and to normally bear against the flange 30EL of the sleeve 30 of the main valve o but not against the flange 31a of the sleeve 31 of the auxiliary valve 24, the arrangement being such that the auxiliary regulating valve 24 will not be operated by the lever h until after the main regulating valve o has been fully opened. The sleeves 30 and 31 bear ulnvardly against nuts 33 and 34 on the two valve rods 32 and 27 respectively.

As will be obvious the details of construction can be variously modiiied. In the constructional arrangement shown, the steam chest p is arranged at one side of the turbine n and is constructed with a steam sup ly inlet passage 36 controlled by a stop valve 37; with a main steam outlet branch 38 for supplying steam, under the control of the main regulating valve o, from the steam chest p to one end of the turbine; and with an auxiliary steam o tlet branch 39 for supplying steam, unde the control of the auxiliary valve 24, from the said steam chest to a part of the turbine located between its main steam inlet and exhaust. The stop valve 37 is preferably ada ted to act as a safety valve to automatical y shut off the supply of steam to the steam chest and turbine in the event of the speed of the turbine exceeding a predetermined limit. F or this purpose it is arranged to be opened by the forked end 4()a of a lever arm 4() fixed upon a spindle 41 that extends through a stuffin box 42 and has fixed to its outer end arbe l crank lever 43-44, one arm 43 of which is loaded, as by a weight 45 and is adapted to serve as a hand lever whereby the valve can be opened for starting. The other arm 44 of the lever is connected by a'link 46 to one arm 47 of a second lever 47-48 that is pivoted at 49 and the other arm 48 of which is ada ted, as by providing it with a curved lateralpextension 48, to be held by a depending trip arm 5() that is fixed to a spindle 51 to which is fixed a horizontal arm 52 arranged to be raised by the sleeve 53 of a safety governor 54. The arrangement is such that when the hand lever 43 is operated to open the safety valve 37, the extension 48" of the lever 47-48 will be caused to move past the end of the arm 5() which nall sna s behind the extension at 48b and ho ds tie lever 47-48 and connected parts in the positions shown and so holds the safety valve 37 open. U on the s ed of the turbine exceeding t ie preetermined limit, the governor sleeve 53 will operate the lever arms 52 and 5U so as to release the lever 4?-48 and permit the weighted arm 43 to fall and insure the automatic closing of the valve.

The shafts 55 and 56 for the regulating and safety governors 6 and 54 are driven respectively b v worm wheels 5T and 5S that are in gear with a worin 59 on the turbine shaft 6() and are iuclosed in a easing 61. The oil pump 3 is driven from the same shaft 56 ns the safety governor 54.

Means may be provided whereby the action or the regulating governor 6 can be varied, it may lie while the turbine is runnir v. for adjusting the normal s -ed of the mrine. For this pu ose. in t rc exam ile shown, the rod l of tie controlling va ve l has connected thereto one end of au adjustable spring` 62 the other' end of which is connected to a verticallv :adjustable nonroratahle screw-threaded sleeve 62 that extends ilrrnugh a nut 63 which is arranged l pressure engine, tlre combination of a valve for regulating the supply of lluid to the engine, a lever filler-tuned aty one end and connected intermediate its e-irds to such i valve, a fluid relay for operating,r said lever to open said valves, a Iluid pressure suppl for operating the l'luid relay, means dependsing,` u on the speed of the engine for governiing t ie supply of fluid to the relay, and means independent of the fluid pressure for l returnin;r the relay to its normal osiiion. l 2. In governirvr apparatus or a lluid i pressure engine, t ie combination of a valve r chest. a main regulating valve adapted to f control the passage of motive fluid from said valve chest io the engine, a lever pivl oted at one end and adapted to aetuate said regulating valve. a speed governor driven by l said engine, n reerprocating motor relay adapted to operate said lever and regulating valve, u valve for controlling the o eration the ontrolling valve and the governor and relai l fl u lieleh)I the ront rolling valve will 2 be openeu h v the governor upon variation in i l of said relav. and conueetinr means ctweerr l to be rotated hut not to move endwise and l speed of the engine from the normal and will b v means of which the said sleeve 62'* can be i be afterwards closed b v said relay.

moved endwise. 64 is a set screw rovided 3. In governing apparatus for a lluid with a handle and lrv means of w ich the pressure engine, the combination of a valve sleeve 62 can be prevented from turning chest, a niain regulating valve adapted to operating lever It and attache and b v which it can be lil-.ed in position after adiustinent.

leans may he combined with the piston rodfoit the relay ruotor for raise* the valve if parts h v hand for starring the turbine or at other times. Such means (hereinatcr called startingr geur) comprises a hand lever 65 lived upon a spindle 66 that is connected to means sueh as a cam which is arranged within a easing T0 and is adapted to act upon a shoulder on the valve rod and lift it when the hand lever 65 raise This lever will he held in the raised position until the pressure of the oil supplied to the relay cyhnder i rises suhieiently to relieve the com of the weight of the valve operating lever and attached parts when it will be automatically released and allowed to fall int-o its inoperative position.

It is preferred to arrange the regulating governor, safety governor, oil pump and at taclred parts atone end of the turbine, as in. the exam le shown, but they can he arranged in or'v er 'posit ions if desired.

ItA will he evident that various other changes can be. made in the construction of the governing ap aratus hereinbefore described itithout eparting from the spirit and scope of the invention so long as the relative arrangement nf the main parts of the apparatus or the mode of operationdescribed is reserved.

"hat I claim iss- 1. In governing apparatus for a iluid control the passage of motive Huid from said valve chest to theengine, a lever pivoted at one end and adapted to aetrrate said reguhiring valve, u loaded auxiliary regulating vulve adapted to control the passage of f steam from said valve chest to another part of said engine and to be operated [mma part of said lever between its ulcrurn and the connection t] to of the main revulating valvc after the main regulating vrilve has been fully opened. a speed governor driven bv said engine, and means under the control o said governor for operating said lever 2 when the normal speed of the e 'fine varies. a'. In governiri" apparatus or a fluid pressure engine, t ie combination of a valve chest, a main regulating valve adapted to control the passage of motive Huid from said valve chest. to the e eine, a lever pivoted at one end and adapt to aetuate said regug lating valve, n loaded auxiliary regulatmv valve adapted to control the passage o steam from said valve chest to another part of said e 'ne and to be o erated from a pa rt of sait lever bets-een its cram and the connection thereto of the main regulating valve after the main regulating valve has been full;r opened, and a relay under the control of said governor and whereby said lever will be operated in one direction or the other when the speed of the engine varies from the normal.

5. Governing apparatus for n fluid pressure turbine comprising a valve chest having main and auxiliary outlet passages leading to different parts of the turbine, an endwise l movable main regulating valve and a loaded endvise movable auxiliary regulating valve for controlling the passage of" motive fluid. from said valve chest to the respective said outlet passages, a lever pivoted at one end and connected. to the main valve and adapted to open the auxiliary valve when the main valve has been fully opened, a speed governor driven from said. turbine, a reciprocating motor relay having its piston connected to the other end of said lever and a controlling valve subject to the combined and opposing actions of said governor and relay and adapted to control the passage of actuating fluid to and its exhaust from the relay cylinder.

G. ln governing apparatus for a fluid pressure engine, the combination with a main regulating valve and the engine governor, of a reciprocating oil motor relay comprising a cylinder provided with a piston connected to said valve and with a combined fluid pressure supply and exhaust passage, an oil pump, an ex iaust ipe, a controlling valve comprising a casing aving three separate branches one of which is in communication with said pump, another with said combined supply and exhaust pipe and the third with the exhaust ipe, a piston valve that normally closes t 1e communication between said combined supply and exhaust pipe' and the pump and exhaust pipe, and a balancing piston connected to said piston valve and arranged to work in the valve casing, the oil supply inlet to said casing being located between said piston valve and balancing iston, a rod for reciprocating said piston va ve and balancing piston, and a floating lever connected to said rod, to'said governor and to the piston of said relay.

7. ln en ine governing apparatus, a fluid pressure re a comprisin a cylinder having a combined inlet and out et passage, a controlling valve comprising a casing having an inlet branch, a combined inlet and outlet branch connected to said inlet and outlet passage, and an exhaust branch, a piston valve controllin the combined inlet and outlet branch, a alancing piston connected to said piston valve and arranged to work in said valve casing, the inlet for fluid under pressure to said casing being between said piston valve and balancing piston, a rod whereby the combined piston valve and balancing piston can be reciprocated from the engine governor and relay piston, and a drain passage connecting the end of said casing at the outer side of said balancing piston to the exhaust branch of the casing.

8. In governing ap aratus for afluid pressure engine, the com ination with a main valve for regulating the supply of motive Huid to said engine, a lever for operating said to the relay piston rod so as to bc engine, ol' a reriynocating fluid pressure motor relay having its piston and rod Connected to said valve operatingr lever, a controlling valve eonnected to said governor' and o )erated from each of these parts for controlling the action of said relay as set forth when the speed ol' the engine varies, and starting gear whereby the relay piston rod can be moved by hand for operating the valve operating lever and main reguhtting 'valve for starting the engine.

9. ln governing apparatus for a fluid pressure engine, the combination with a main regulating valve for controlling the supply of motive fluid to said engine, and a governor driven b f said. engine, of a reci rocatinv fluid b D i )ressure motor relay for operating said reOulating valve7 a reeiprocatory controlling valve for said relay, a valve rod and floating lever through which said controlling valve is connected to said governor and to the piston of said motor relay, a spring arranged between said rod and a fixed su )port and acting upon said rod, and means "or varying the action of said spring.

10. ln governing apparatus for a fluid pressure engine, the combination with a main regulating valve for controlling the supply of motive fluid to said engine, and a governor driven by said engine, of a reciprocating fluid ressure motor relay for operating said reguating valve, a reciprocatory controlling valve for said relay, a valve rod and floating lever through which said controlling valve is connected to said. governor and to the piston of' said motor relay, a coiled spring encircling said rod and connected at one end thereto, an externally screw threaded nonrotatable sleeve connected to the other end of said s ring, and a rotary nut through which said s eeve is screwed and which is held in an endwise direction.

11. Governing apparatus for a lluid pressure turbine, comprising a valve chest arranged at one side of the turbine and provided with an inlet for motive fluid and with an outlet connected to said turbine, a main regulating valve controlling said. outlet', a lever pivoted at one end, connected at an intermediate part of its length to said regulating valve and extending in a longitudinal direction over said valve chest, a reciprocating motor relay arranged at the corresponding side of said turbine and having its piston rod connected to the free end of said lever, a s eed governor arranged at one end of sait turbine and driven from the driving shaft of said turbine, a reciprocating controlling valve for said relay, said valve being adapted to control the flow of liquid. under pressure to and from said relay, a floating lever that is normally in an approximately horizontal position and is connected at one valve, and a speed governor driven by said l end to the movable portion of said governor,

and a downward extending rod eonnertini! to said eontrollnngr valve, a seeond donn.

Wardlv extending' rod jointed to the other end of said lloating lever, and a loniritudid nallv arranged rork shalt provided with two lever arms that are nornmll),Y held in :tu ap- )roxinlatelyr horizontal position and exten i 111 the saine direetion lrom sail roeh shalt and one ol whieh is eonneetel to the pistou rod of said relay motor and the other to the lower end of the seeundtv mentioned flownward extending rod.

12. Governing' apparatus lor a steam tuebine, eomprising a valve ehest arrangfel at one side of the turbine un@ provif-,ed` with a main valve for regelathn;- the supplyy oi" motive luid to said turbine, :t longitn inalij: arranged valve operatiin;` roi'. pivote l at one end and connected to valve at au intermediate part of its length, a .fe1ti-zfallyV n.1 ranged reciproeatorv oil motor relayY a lapte to operate said rod, a rotary oil pump arranged at one end of sain` turlffine, and .ri ven from the turbine shalt, an oil reeinitaele, a normally closed controlling,r valve adapteto control the passage of oil under pressen from said pump to the relayV and` from the relayY to the oil receptacle, a speel governor arranged at the same end of sai.;` turbine zu;

the pump and ldriven from tir :friving shari of the turbine, a lloatmp; lever that is nor mally held 111 an approxnnatelyr horizontal lullv op position and is eonneetel at one en.` to tire engine governor, a downwarulv extending' rod eonneeting an intern1e1iate portion ot' said floating lever to said eontrolliirg` valve, a second downwardly exteirfiiig rol eon neeted to the other end ol' sai@ l'loatiir;- lever. and connecting means between sail ser-1on1 rod and the relay piston and .vherelbjvr the second end of the floatingr lever will he@ raised when the motor piston is raisef..

13. In governing apparatus Vfor a liuirl pressure engme, the combination of a valve chest, a mam regulating valve adapted to control the passage ol motive lunl from sani Avalve lor admitting pressure Ilui'l to one side ol' sui l relay piston or ehhaiisting;l it therelrour. means eonstantlv opposing the action o' the pressure llnif on sail relav piston, and

nonni-Ming," means liet.v,=een the eontrollingg,` valve and the governor and relay, and wlnrelrv the (-.ontrolhnpr valve will he opened Y .K Y. lijf trie nmernor upon variation 1n speen ol the` engine from the normal and will alltel'- ward he rlose jv the resulting' movement of saii relai'.

ll. lu governing apparatus lor a lluial pressure engine. the eonihilnttion ol` a valve Mwst, u man; i'tigulsttiiu; valve adapted to voutrol the passage ol motive lnid from said valve r-uef-it to the engine, a loa 'el anxiliarvv w dating' valve :is aptw to eontrol the paslfrol' :Sylvain lroin .snif v :tlve to another part :liuv engine, means eonneeting said valves .vliereli). the auxilinrjvV valve .vill not open unless the untin regnilating valve is lirst i Aa .L1-pee* i-ovvliior driven b v etif .fl means un er the control oli .uri lor operating; sari valve eonneetinej means when the normal speel of the en iue varies.

15. ln governing apparatus l'or a lluid pressure engine, the eomhination ol a valve virent. a main regulating valve adapted to naif engine, a relay adapted to regulating valve, a valve eenrolie 1 h v the governor lor admitting presre iin to move the relayY one wav, and means opposing stir-h movement, sai-l means heine' a'ljnstahle while in operation.

Signed at N weastleupon-Tyne, England, 'this luth. hay of JulyV 1905.

HUGH FRANCIS FULLAGAR.

W itnesses:

H. NIKON, (lnAs, T. Baines.

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