US912303A - Locomotive-engine. - Google Patents

Description

H. W. GARRATT. LOGOMOTIVE ENGINE. APPLICATION FILED mugs. 1908.

Patnted Eeb.16, 1909.

UNITED STATES PATENT OFFICE. HERBERT WILLIAM GARRATT, or STAMFORD HlILL, ENGLAND. Locomorrvs-ancnm. I

Specification of Letters Patent.

Patented Feb. 16, 1909'.

Application filed m 25, 1908. Serial in. 445,385.

To all whom it may concern:

Be it known that I, HERBERT WILLIAM GARRATT, a subject, of the King of Great Britain, residing at 25 .Leweston Place, Portland avenue, Stamford Hill, in the county of Middlesex, England, have invented new and useful Improvements in and Relating to Locomotive-Engines, of whiohthe following is a specification.

My invention consists of improvements in and relating to locomotive engines, and particularly to locomotive engines of the double bogie type, the-princi al ob'ect of my improvements being to a mit o a combination of an extremely lar e boiler having a low center'of gravity and large drivin wheels if required on both bogies, the ho er and its fittings being carried in a frame of the shortest le 11, practicable and connected substant' yewitlrout overhang at both its. ends by swivel centersto twoself'driven bogietanka whichfcarrythe coal and main. water-supply as well as the steam cylinders and driving mechanism for the wheels.

OWin r to the gage of the rails being fixed the resu t of the usual arrangement of com bining a large boiler with large wheels is the raising of the center of gravity to an undue height, as: a boiler larger than will go in between the wheels must be laced. above them, and the larger the wheel s or the boiler, or both, the higher becomes the centerofgrawity until it is dangerously high.

There are already various forms ofloco-.- motive engines of the double bogie t e, de-

signed, and among these are the .airlie the Kitson Meyer and the Mallet. The leadin features of the Fairliesystem, as set outinairlie and Perkins s ecification No. 2616 of 1872, are the ap 'cation of steam to bogie frames or swive ingtrucks, the construction of double boilers with a central or common fire box, and the employment .of a long ri id frame, termed the carrier.

frame, on wh1ch the boiler fuel bunkers and water tanks rest,- and whichis placed above the bogie frames, and carries at or neareach end. a pin or head on'whichthe said bogie fi'amesswivel. An example of the Kitson- .Meyer or. Meyer-Lindner. ty e is shown in Engineem'n of 12th A r 1907,. and in. Qassiera: ifagazine Febmary 1904 there is: arr. article: dealingwith; a; numhcr of: typesofidouble.bogiejengmes.

According-to my said invention I carry theboiler in a frame slung between two self there are four shown coupled on each. bogie driven bogie tanksso that it may be aalfow H down as possible. leavin simply the. necessary clearance for the as pan above the rail level. Unlike the carrier frame in theFairlie and other types of double be is engines, ll. terminate my carrier frame at t e sw1veling-- heads or centers where it rests on and isconnected to the ho is tanks, and I thus-obviate. the ob'ectionablia and dangerous. overhasni of the. ong frames: with their superimpc. weight of the vaforesaid t pes. I may adopt. any suitable form ofbo' er and. any-convenient method of slinging its carrier frama,..sn long as the swivel centers are at the ends: in order to avoid. overhang of the above described. I

In. the accompanying sheet of. drawing; 1 illustrate. one. example of how-my! invention. may becarried into. ractica-l efiect.

Figure l iaasida vatinmcfralccnmctm. engine according, ta-

lam-- timr. Fig. 2*. is. a. plan. ViEW ShQWIQHg same on what is. known as a five-chain curve; Fig. 3 is an end view, showinglleialf of one-end. and half of the other end oft engine.

In these views, a designates the.- boiler which may be of any suitable type, for ex.- amplea boiler: of the locomotive type or. a water tube boiler may" be adoptedowmg to. the lar espaceavailable; b: a carrier or cradle for the. boiler of any 811111761318. cum struction.and.ofther. uisite.strength; ;mtha two bogies.-and tankslhereon; at the I ton swivel centers by which thaendsiof: 6:081!- rier frame-b areconnected respectively-tome. two. b ogies;:e steam cylinders which. Wll'illl... the necessarydriviug gear are: mountedoaeach. of. the bogiesand 111 the positions indicated. I or in any other convenient positiom as-may be desired according to the arrangement, number and-coupling of the-wheels; f thecab for the driver;- 9 driving wheels of which.

in this instance, but. any other. suitable number may beemployed andhqleading or trail-- ing wheels on each'bogie. It will be. obvious from the description and; drawing. that. in. this arrangement the boiler can be carriedso. as to bring the center of gravit to; the'loweat, point possible and. practicab e,. and; it, will alstrbe readily: understood. that: the firehcxr. m beef. 9 tawidthandcapacity.

w 'andwatentanka are bogie tankac, and emanates-in theaforseaiddouble bogie. typesof. locomotive engines placed on thecarrieriframe In. my arrangement these tanks and their whole weight are on 'theb'ogies, say the fuel and these three portions consisting of two self driven bogie tanks with large wheels or in,

fact any sized wheelson both bogies, and the boiler with its fittings and some details on the boiler frame, and this construction enables the locomotive to travel round sharp curves with the. very great advanta e that the center line of the wholelength of t central portion, when so travelin round curves,

forms a chord of the circle, w ch is the center line-of the rails formin the said curve.

.As already stated I obvlate the objectionable overhan common to other existing types'of doub e bogie engines by terminating the carrier-frame b at the swiveling centers d Where it isfconnected to the bogies. This is a-great and important: advantage when oing round curves as it counteracts theten ency of the engine to overbalance and thus im-' proves its stability. In prior constructions of the double bogie type the projection or plerticularly when rou overhang of the frame beyond the swivel centers and the heavy weight thereon has rendered the whole locomotive unstable,

7 r ding curves.

rther enabled to place the tanks centrally instead of having them, as in ordinary constructions, at the sides, which-,is disadvantageous as side tankslimit the diameter of the boiler,'and thisweight at'either outside ed e of the frame directly reduces the stabih'ty of,the-locomotive. Further the carrier frame is relievedof the weight of these tanks,

7 and the tendency of the locomotive to roll is immensel lessened.

If required an additional water tank may 'be placed beneath the barrel of the boiler, if

that be-of locomotive type, thus still further lowering the center ofgravity. v

The whole of the'space .between the sides of the" carrier frame, above and below, subject, to the limitations ofthe loading gage of the railway is available for the boiler and fire .box, which can thus be of great diameter and v width res ectively.

As the filer is entirely between the self driven bogie tanks, in my arrangement, I

can employ w eels of any required diameter,

. on both bogies, and all of thesewheelsmay be utilized for tractive pu oses ifreqaiired thus enabling the full weig t of the engine water, fuel, and bogie tanks to be used for ad I ame1a,aos

hesion, whereby I obtain an engine of very great tractive forcecombined with spee large water and fuel capacity, and a low center of gravity irrespective of the size of the driving wheels. hurther a very excellent look out is providedfoi: the driver owing to the low position of the boiler; and'owingalso to 1 the space available, the water and coal tanks although of great capacity, can be kept low and flat, thus/greatly assisting to render the engine stable;

My improved construction ofengine gives a'normai footp.ate as compared 'th the inconvenient one at the side as in he Fairlie type; and further if required a cab f can be placed at each end of the-boiler. The distribution of weight on the bogies isgreatly superior to the 'tson-Meyer type of engine. In my improved type, the weights on each bogie are equal or practically so, whether the engine is empty or in full working .order, whereas in the Kitson-Meyer engine, this varies considerablyms the water and coal are consumed, thus afl'ecting the adhesion of the wheels. 90 The steam may be conveyed from a the boi.er to the cylinders e by any suitable means, for instance, by pipes and a ball and socket joint at the center of the bogie center or in any ordinary way .by means of flexible connections, and the exhaust returned in a similar manner, or through the bogie center hearings, which may be providedwith suit- 1 eble ports and passages in the bearing surace.

What I claim as my invention and desire to secure by Letters Patent is 1. A double bogie locomotive com a pair of bo 'es,- a frame having its en s supported by t e bogies, a boiaer and fittings carried by said frame, driving mechanism carried by the bogies, andgipes connecting v said driving mechanism wit the boiler.

2. A double be 'e locomotive comprising a frame, a pair of ogies,.means forp1voting each ,end of the frame to the bogies, a boiler and fittings c ied by said frame, steam c linders, and 'ving mechanism carried y 7 said bogies, and pipes-connecting said cylin ders with the honors i 3. A double. bogie locomotive comprisinga frame, a boiler and cab carried thereby, a pair of bogies, swiveled -heads,.connecting .each end 0 the frame to one of the b0 'es with. a minimum oyerhan steam cylin 'ers on the bogies, mec anism connecting said cylinders with t 0 wheels of the bogies, pipes connecting said. cylinderswith the oi.er, main water and fuel tanks carried-by the bogies. 9

4. A double bogie locomotive-comprising a frame, a boiler and cab carried thereby, a pair of bogies, swiveled heads connecting each end 0 Y theframetopne of the b0 'es .with a minimum overhang, steam cylin ers 1 80:

onJhe bogies, drivinimechanism connecting name to this specification in the presence of ssid cylinders with t gwheelsl of the blfgiis, two subscribiiig witnesses. 1 es connectin sai c iin ers wit t e o iler', main wat r and fu e l tanks carried by HERBERT WILLIAM 5-"the-bogies, *and a water tank carried under Witnesses:

the frame; 4 HERBERT ROWLAND ABBEY,

In testimony whereof I have signed my LEONARD HARRISON.

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