«'-»' ^ .^. , •.<" r^ V*- ♦* // IMAGE EVALUATION TEST TARGET (MT-3) *j 1.0 IF ^ Ui 120 2.2 IL^lu 11.6 1.6 j^ ^1. .»s#- «i • ScMices ^/ .V 'ik, % A' as WKT MAM STRHT WIKm.Av. 14StO (71*)I71-4S03 ;\ a hi'iib^ 1 1 1 Canadian In ^ ciHiyi Microfiche Series (iUlonographs) ICMH Collection ^e microfiches H^ (monographles) *vy Canadian Instituta for Historical Microraproductiona / inatitut Canadian da microraproductiona hiatoriquaa Technical and Bibliosraphic NotM / Nota* tachniqiia* at bibliographiqiiit Tha Imtituta ha* attamptad to obtain tha ba«t original copy availabia for f ilntina. Faattiras of this copy which may ba biMiographicallv uniqua, iwhich may altar any of tha imafM in ttia raproduction, or which may •ignificantly chanfi tiM usual matlwid of filming, arc chackad balow. L'Institut a microf ilm4 la maillaur axamplaira qu'il lui a M postiMa da sa procurer. Las ditaili da cat axamplaira qui lont paut-4tra untquas du point da wua bibliocraphiqua. qui pfuvant modif iar una imaia raproduita. ou qui pauvant axifar una modification dam la m4thoda normala da f ilmafa lont indiqufc ci'dasMut. - □ Coloured covari/ Couirartura da coulaur a Covari damap d / Couvartura andommatto □ Coloured pagai/ Pages da coulaur □ Page#llBnlafed/ P89M andommagtos □ Covers restored and/or laminatad/ Couvarture restaurta et/ou pelliculAe □ PaflM restored and/or laminated/ Pages restaur4es et/ou pellicul4es n D n Cover title missing/ titre de couverture manque Coloured maps/ Cartas giographiquas en couleur Coloured ink (i.e. other than blue or Mack)/ Encre de couleur (i.e. autre que Meue ou noire) t D .'«■ n Coldbred platM and/or illustrations/ Planches et/ou illustrations an couleur Bound with othef material/ . * ReliA avec d'autres documents Tight binding may cmisa shadows or distortion along interior margin/ La raliure serrte peut causer de I'ombre ou de la distorsion le long de la marge intirieure Blank leaves added during restoration may appear within tha text. Whenever possiMa. these haM been omitted from filming/ II te peut que certaines pagn blanches ajouttes lors d'une restauration apparaissant dans le texte. mais, lorsqua cela *tait possible, ces pages n'ont . pas at* film^as. Additional comments:/ Commentaires supplAmentairas: Pagn discoktured. stained or foxed/ Pages dteolorAes, tachaties ou piquies □ Pages detached/ Pages d«taeh«es 'W .^J'"^ Showthrough/ |V£J Transp*r * This item is filmed at tha reduction ratio checkedlwlow/ Ce document «t film* au taux de rMuctiori indiqui ci-dessous. 10X 14X 18X II I I i if I ■ I Quality of print varies/ liti inigala de I'impression Continuous pagination/ Pagination continue Includes index(es)/ Comprend un (des) index Title on header taken from:/ La titre de I'en-tlte provient: I I Title page of issue/ D D Pagerde titre de la livraison Caption of issue/ Titre da dtpart da la livraiton % Masthead/ Ginirique (piriodiques) da la livraison 22X 26 X 3QX 12X liX 20X 24X 28X 32 X #f=^ Th« copy fllmMl h«r« haa iMtn riproduMd tMnkt tp ttM ocvM^otHy of: Library of the National Arehivas Of Canada TH«^nM9«ii appMring hart aratlM poiMibIa eonaidaring tha eandMon of tfta orfginal oopy and in kaapkig filming quality lagibiiity Original aoplaa In pHfvMd papa r aovora ara fNmad baginning wKn tlia ffont oovof ano anoing ott tha loot paga with a printpd ar Wuatratod Impraa* alon^ or tho book aovar wban appropdat*. All otttar original aoplaa ara fNmad baglnntaig an tha firat paga with a printad or Uluatratad bnpraa- alon. and andtoig an tha taMt paga whh a .printad or Nkiatratad Impraaaion. ■ Tha laat raeordod frama on aach mieroflcho ahaN contain ttia^iymbol ^^ (moaning "CON- ^ TINUED"!. or tho symbol ▼ (moaning "END"). ' Mapa. plataa. eharti. ate., may ba fNmad at diffarant roduetion ratioa. Thoaa too larga to bo ontlraly Hicliidad in ono oxpoaura ara fNmad baglnriing In tha uppar laft hand comor. loft to right and top to bottom, as many framaa as raqulrad. Tho following diagrama illuatrata tha 1 2 3 ^ L'aiiamplaira filmi f ut ginArosit* do: it^i rodiiiigrica A la U biMioth«qua das Archivat nationalas du Can^i Las imagas suivantas ont AtA raproduitss svsc la ^us grand sain, eompta tanu da la cenditton at da la nattatA da I'axanfpiaira fiimA..at ^n eonformKA avae laa eanditlons diu eontrat da fNmaga. Laa aaamplalras ariglnaux disnt la couvarturaTan paplar aat ImprlmAa aont fNmAs an eommanoant par la pramlar mjat at an tarminam salt par {a damlAra paga jjgul eomporta una amprainta - ^ dimpraaalon ou dINuatratlon. solt par la sacond plat, aalon lo eaa. Toua laa autraa axan^plairas origlfiMM SOnt fNmAs an commandant par la pr a mlAro paga qui eomporto uno omprainta ■ dimpraaalon ou d'lNuotration at an tarminant pf r la damlAra paga qui eomporto una taila amprainta. Un daa aymbalaa suivants spparattra sur la damlAra image da cheque microfiche, selon le ces: le symbols -i^ signifie "A 8UIVRE". le symbole ▼ signifie "FIN". *■■..■ " ■„-. . ♦ Lee cartae. planchaa. tableaux, etc.. peuvent Atre f llmAe A dee tfux do rAductlon dif f Arents. Lorsque le document est trpp grend pour Atre reproduit en un soul cllchA.il est filmA A pertir do I'engle supArieur geuche. do geoche A droite. et do haut an bee. en prenent |p nombre d'imeges dAceeseire. Lee diegremmee suivents IHustrent le mAthodo. * i' *' » 1 ■i % 1 2 » 3 1 * ' "" * • > - m l • 4 5 • 6 • ■ .. '- i r . .J. - ,■ . - • -4 •if. ■ • ■ i i /••' U GREAT WESTERN RAILWAY. DESCRIPTION OF AND INSTRUCTIONS FOR WORKING THE • CONTINUOtrS AUTOMATIC VACUUM BRAKE. wjsi:b'RTTj^^j 1883. % V!, ..J ' iiJto&Aariia './ DESORIPTIok. ■-:^ t 1 — -The Automatio Vacuum Brake stopa the train bythe applieation of the brake bkwka to the tjrxev, in the same waV, as the ordinair lorew brake ; but fhe lerera which, apply the blocks instead W beiuK worked by a lorew are woriced by a cylinder and piston, actuated by atmoepherio preisare. ^ S.— The following are the prindiial parts 6t the appai^tua on the earria|(es, the refMonoe letters showing the corresponding^ parts on the diagrams on page ■ 3. being— ' . " ' • { . ^ « A Continuous Pipe, connected by flexible pipes between tbe carriages. , B Hollow Piston Bod, connected by branch pipe to the continuous pipe. ♦ ■ ' ,- ■ ■ ' O Piston. . D pylinder, capable of moving freely up and down on the fixed piston, and connected at the bottom with the Brake ILerers K, The Piston is packed with an india-rubber ring, so arranged that air can pass freely from the bottom of the qrlinder to the top, but not from the top td the bottom. The piston rod is also packed witl^ an india-rubber ring or- : gUnd. , S. — Brske •jf. ^ The air, is exhausted from tWpwea and oyhnders, by the ejector on the engine when the train is. at restjor Dy the air-pump on the engine when the train is in motion. The gauges on the engine and in the 'guards* oompurtments indicate the power avUlable for stopping the tnun,.' / and should snow not less than 20 inches nor mere than 30 inohea of Taouum whm tk$ tr*m it nmntHjiy The Tacuum:Keing eatti|l on both sides of the piston, the oylini}er foils by its own weight and helds the brakes off the wheels. (See Fig. 1.) 1^ ^ / 4. — Brai» an. The moment the air is admitted ili^ the continuourpipe^ ^ whether by the engineinan, or by the guf^rd, or by the accidental severance ' of the couplings, it rushes .through Uie* continuous pipft down tho hollow piston-rod into the uppir part of the cylinder, aira>^ pressing the mdiarrubber packing ring against the sid^ of tiie cylinder, seals the ▼aonum on the under side of the piston to ^at the preesui^ c^ air in the upper pan of the qrlinder, ha^mg noUiing to balance it on the ^>«he^ aide of t^ piston, thrusts up the cylinder and presses the brake blocks against the wheels. (See Kg. 2.) ^^ : 6.—lUttttt qf Brah, When the brake has been applied it \win remain xlm, unless released either by the exhaustion of the air fiNmi the upper side of the piston (see par. 8) or by the admisrioa of air to the under ^de of tlie piston. In practice the latter mode is generally found oonvenient, a^d a smill hole, A, is provided through which the air can slowly leak trom ^ upper tp the lower piirt of the cylinder and gradually release the brake. It is\theiefoii neoessaiy m the event of a train parting, for tha guard in the rear pprticm at onoe to'apply the hand brake, an4 to keep it sorawad on unW the train\ia again coupled to the engine. . , \, \ 9.—Bnk$ Setttn. In ordMr to apply the brakes on each carriage in the ti^ as neariy as possible at the same moment it is neoeaapffy to admit tha air to the oontinuons pipe in more than one plaoei For this purpose- « valve or brake setter is provided in each guard'a compartment, so oonstruoted that any sudden i n er oaae of pressure in the pipe instantly o .. ^ . • t antomatioallv and a^t a supply of air, after which weight. By lifting the handle attiu;^ed to the brake sel stausganqr apply the brakes on thb entire tnOn. I V-?" f\» % i •4;.-;V lA. ■^ .'\ \* INStRUOTIONS FOR WORKING. \ ■ * 7 — Ih the fonnation of Trains when the Mrhole of. the coaches are not fitted with the Automatic Vacuum Briiko tl,o»« that are to fitted must be P Hc«d togetlier, and next, to the Engine. Whon the whole Tra.n'.B not tittod.^he Automatic Vacuum Hrake mu«t nut be u*«l for ordinary stoppages, but only in catos of emergency. In all cases where the Automatic Vaduimi Brake is only , partially fitted to l *rain. a Brake Van, or a Oarnagis >^»lb a Guard >u 't«iu.t . he the last Passenger Vohicle m the train, and this Guard must apply hw hand- brake in running into all stations where the train is to be atoppod. . 8..--The Brake can be applied throughout the whole of the vehicles fitted with the apparatus, by the Engineman from the enmno» ?' "X *"« SuSd from his iin ; but in order that this may be done, it is miporaUve that the flexible connections between each carnage, and between the engine and the train shall be properly coupled up. 9.-Guards must never apply the Automatic Vacuum Bn*e except in cases of absolute necessity, and whenever they do so a full report of the ch^m^rtaiee^ must bo mido on their journals; they must at oil times be ready to ipply the fumd-irah should the driver ca'J by whiatte for its assistance. 10 — ^Vhen the Auto|hatic Vacuum Brake it to bo lued for the ordinary stopitoge of trains it mu?t be by the Engineman opcniaff the air vaWe on theT|JS»e, but It must be done gradually and never suddenly or with full force except in cases of emergency. , . v 1 l.-In Approaching Junctions, Terminal Stations, or Stations at ^hich other trains mi} be standing on the same liuo of rails, oir Cro«img f-ti^"' ^J Singlelines, the Automatic Vacuum Brake or Steam Brake must only be used in clies of emergency, the Enginemen taking care to reduce ^eed ot the train !S arordance with Kule No. 293, so that the train may be brought to a stand by the hand-brakes alone. » ' ' ; 12 -In descending Inclines the enginetaan must, when necessary to jedjice the speed, use 4he Automatic Vacuum Brake in preference to the hand-brakes. ll-ln running through Slip Stations after a slip carrii^ ^*1^. ctetkched. the Vacuum Brake must not be used except in cases .of emeigenoy , S^SIs n^es^iry to control the speed of the ♦«» the jp^-brake mu?t ^ 4ployed. and in any caae the greatest caution should beTwd to prevent th«( slip earriage overtaking the train: \ \ 14 —The iruard before giving the Signal to stwrt at the iiommenoement ^ the journey; L^at stations wherJany of'^the ffe«ble pipe, h^e been coupled or u^cdtaptod, must ascertain and inform the engineman:— ^ That ail the flexible pipes ^ propeirly coupled "P. «?^.*»^2g V throughout the train, and thV the fifxible pipes of the Ust Brake Vehicle is properly jdaced upon the atop plug. The number of vehicles in the tndn fitted with the brake, the flexible pipes of which j^re coupled up to the Engin*. That at least 16 inches of Vaoimiiii»>dio»t6d by the gMic(e in the rear gauge. 16.-The engineman before starting at the eommenoementof tijejonniej, «d ah« at stalSns where any of the fle«ble pine, l^^* ^ ^^ttZ "coupled, murt a«»rtain from the gaud the niiinWr of ijhidea ^^^ m^\m the brake, the flexible pipes of whidl ere courted up to «« «ff^ and th«r« Vacuum of at least l5 &wkes isshovn by flie gwge m the rear van. He most also be oareftU to'see :— T|»t the Vaoiiwn nipe of his engine i» vroftAj coupled up to the lid&ig^feliieleinAetniii. a • That at least 16 inches of Yscnum is indicated by the g»i»g« on the. ■ «ngiiw« -.,-:•■ 16.— If j from any cause th6. engineman is unablo to obtaib at loast U ^ inohea of Vacuum, he must' IliprtQ Uie guard of the foot and they muat work the train forward with the ordinary hand^brokoa. 17.— When the pipes between the engine and train are disconneoted, the couplings must be placed' on the plug stops provided for the purpose. Detached carriages must always have the hose couplings placed on the plug stops. ^ 18.— At any station irhere there is any likolihW of vehicles being put onortakcmf off, the Vacuum iit the continuous pipe must be destroyed by opening the air valve on the engine, so that there ma^ be no delay in coupliiig ^^ or uncoupling. - ■ \ ' ^9. — As india-rubber is dissolvitd by oil or grease, it isllost important that nothing of a greasy nature should be implied to, or allowed to reach the piston or piston rod. The only lubrication which is required is a little pure blacklead, which must bo placed inside each cylinder by the persons api>ointed for the purpose. The other part of the brake -ajust be cleaned^and oiled by the , examiners in the usual way. A 20.— In the case of vehicles fitted~with the cotabinSBd Uand and Vacuum Brake, the guard must see before starting that the hand-brake is screwed fiiU off, and the handle secured by means of the chain provided for the purpose. 21.— It is Necessary that the words m Continuous Brake Train " shall be written at the top of the engineman's train bill «|id guard's report for every train fitted with the Automatic Vacuum Brake. It is also necessary f^r ihe engineman to ehow on his mileage ticket trains which have been^orked by him with the continuous brake during the week. \.^ 22.— If from any cause the Automatic Vacuum Brake is not used, or failK to act when required, or if there is any irregularity in its working, a remark to that effect must b^ made by the engineman on his train bill, and by the guard on his report. 23. — Quaiids must take late during the journey that nothing in the Von is allowed to rest against or ,in any way interfere witi^^the Lever of the Brake Setter. **-. 1... W.DEAlt, Locomotive and Carriage Superintendent. \ G. N. TYRRELL, J\^wm^, 1881, ,-BEVi8ED—Fe6nMtry, 1883. Superintendent of the Line. i^-v. -■ -.-K-i 1^ ^mm v/ / . / ^ ^■^ Q li^ ■a'-: «*»• «1P