US1112109A - Drifting-valve for locomotives. - Google Patents

Description

J. BILLING-HAM & 0. F. KAHLER. DRIFTING VALVE FOE LOCOMOTIVES.

K APPLICATION rum APR. 24 1914. 1 i 1 Q, 1 @9 Patented Sept. 29, 191 1 2 SHEETS- SHEET 1.

J. BILLINGHAM & O. P. KAHLER. DRIFTING VALVE FOR LOCOMOTIVES.

APPLICATION FILED APR. 24, 1914 Patented Sept. 29, 1914.

g. j/c'a v I I 3 WITNESSEzi/ "preferably, as shown, located in the cab of lower side of the piston, 13, of the admission the locomotive, and comprises a lower pistonvalve mechanism, will raise said piston, chamber; 11], to therren ovable bottom plate, thereby unseating the admission valve, 12, 11:, of which, -the,,flu 1d pressure delivery and admitting a limited volume of steam 5 pipe, 6, leadingfrom the vacuum piston cas-J through the pipes, 14 and 17 to the distriing, 3, before described, is connected, and an butio rvalve chests and the cylinders. This upper valve chamber, 11, which communiadmission of steam will continue during the castes with the piston chamber through 'a drifting of the locomotive, therebycountercentral passage, and is closed at top by a acting the tendency to the formatibn of a 10 removable cap, 11?, A partition, 11, exvacuum' in the cylinders, and also, which is tends across the ,valve chamber, and has of material importance, efiecting the lubriformed within it a; central opening which is cation of the cylinders by the admission of controlled by a steam admission valve, 12, steam and of the oil which it carries with it seated in the partition, around the opening from the lubricating pipes, which are- 5 thereof, and located above a stem, 12, which located adjacent to the inlets of the branches extends into the piston chamber, 11, within of the pipe, 17. whicli itcarries a properly packed piston, It is, of course, particularly desirable, if 13,01; substantially larger diameter than the not absolutely essential to conditions of 4 valve l'2, and fitting said chamber. Asmall safety, that the admission of steam to the a piston, 13, on theistem,12, fits in the pascylinders through aconduit independent of sagebetween the valve and piston chambers, that' which is controlled bythe throttle and prevents flow bf steam from the former valve, which has been effected while driftto thefglatter. The valve chamber, "11", is ing, should be stopped when the throttle 1 connected, above the admission valve, with valve is closed and the locomotive is standthe steam space oil the locomotive boiler, by ing. This cessation of independent steam Y a pipe, ,14, which referably leads to a. turadmission is, under the condition last stated, et or sinall steam! dome, 15, on the boiler, automatically efiec'ted? injthe operation of and is controlled ,by a manually operable our improvement,' by the building up 9; in- Valve, A lim tleads'flsm V31??? ll l i i iihfnpressurejinthe c dinders i.due ,t0 @soichanibeijlheloiv the admissionwalve,tdeach the admission of steam thereto through the of'the distribution valve chests, 2, to which pipe, 17. As soonas the cylinder pressure it is connected, on the admission side of the exceeds that of the atmosphere, the piston, 7,

valves, by a T and branches, as shown in will be depressed, the air below it being ex- 3; the piston, 9,

I .Fig. 1. A-clieck ozl' non-return valve, 18, of hausted through the port,

-35 thg crdina'ry construction, is located in the will'cut ofi' communication between the fluid 17, to'preventbackward flow of steam pressure supply pipe, 4, and the fluid presto the valvechamber, 11. 1 4 sure delivery pipe, 6; and the-fluid pres-' p In the operationf of the mechanism abovesure in the latter pipe will be exhausted described, the ste'anii supply valve, 16, hav therefrom through the port, 3 The preslo-img been opened, and the locomotive runsure on the lower side of the piston, 13, of ning under steam, 1%. e with its throttle the admission valve mechanism, being therevalve open, the admission valve, 12, is held by relieved, the steam pressure on the 11 per to its seat by the steam pressure above it, side of the admission valve, 12, will orce and the pistons, 7, 8, 9, and 10, of thevacit to its seat, and the supply of steam to the uum pistonmechani in, being subject to cylinders will be cutoff, and remain cut off,

valve chest'pressure, acting on the upper while the locomotive is standing. side of the piston, 7, remain in the ordinary Experience w th superheatedsteam loconormall seated positions'shown in Fig. 3. motives has developedthat 'difiiculty has f When t 'e locomotive is drifting or runbeen experienced by'the carboniz ng of 01 .ning with its throttle closed, a partial vacin the cylinders, and that, when drift ng, uumwill, by the reciprocation of the pistons there is a gum-my and sticky deposit of oil in the cylinders, be ormed therein, in the on the cylinders, and that the adhesion, to distribution valvechests on the admission this gummy deposit, of dirt drawn nto the side of the valves,-and in the steam supply cylinders when the engine --is drifting to connections leading from the throttle valve any extentwith throttle-entirely closed, conto thedistribution valve chests. The res- 'verts it into acomposition which rapidly sure previously acting on the upper si e of wears away the packing. rings and piston {the iston, '7, will be CPII'GSPOIIdlDglY re-. heads. It has also been found in practice duce ,"and atmospheric pressure, acting on that a' constant small "admission of steam to the lowen'side of said pistonthrough'the the cylinders tends'to insure proper lubriport, 3, will raise it,'and the connected pis cation andprevcnt the carbonizing of the Ytons, 8, 9, and lO therebybringing the flpid o l, and that good results have'been obtained pressure supply pipe, 4, into commun cation bykeeping the throttle slightly open when .v'w'iththe fluid pressure; delivery pipe, 6. the enginewas drifting,;"-The ob ections to "The pressure delivered from said pipe to the this practice are, "however manifest to those skilled in the operation of locomotives',.and it will be equally obvious that these will be avoided by the application of ourinvention, in the operation ofwhich steam is automatically admitted to the valve chests and cylinders, entirely independently of the throttle valve, when-the engine is drifteffected may be connected directly to, the cylinders, as shown in Fig. 4, The manner.

of'operation and result attained-by our inventlon are the same whether the admission be direct, or indirectly through the valve chests as set -for'th,-and the steam supply connections 'to the cylinders "are the mechanical equivalents of similar connections to the valve chests. The adoption of one or the other location of connection is a matter within the discretion and ordinary-skill of the constructor,'and the specific location is not an essentlal of our invention.

The vacuum piston mechanism hereinbe- 5 fore. set forth, is not, in and of itself,

claimed asof our present invention, and con-. stitutes the subject matter of a divisional application filed July 17-, 1914, Ser, No.

of valve chest pressure, governing the application of pressure from said independent source to said steam supply controlling means.

We claimas our invention and desire to secure by Letters Patent v .1. In a drifting valve mechanism for loco motives', the combination of means for con- 7 trolling the supply of steam from a boiler to a distribution val ve chest, independently of the main steam supply pipe, a source of fluid pressure pipe, and mechanism, actuated'by variation for. automatically 2. In a drifting valve mechanism for'locomotives, the combination of a valve controlling the supply of steam from a boiler to a dlStJlblltlOIl' valve chest, independently of the main steam supply pipe, means for actuating said valve bythe application, in the I fluid pressure yacuuminclosing casing,

its opposite, sides to atmospheric and distriipply independent of said" opposite direction, of boiler supply steam and of fluid pressure from a source independent of the main steam supply pipe, and mechanism, actuated by diflerences of valve chest pressure, for controlling the supply of from the independent source to the valve actuating means.

- 3. In a drifting valve mechanism for locomotives, the combination of a valve control lin'g the supply of steam from a boiler to a distribution valve chest, independently of the main steam supply pipe, means for. unseating said valve by fluid pressure from a source independent of said pipe, and mechanism, actuated by a reduction of valve chest pressure, for supplying fluid pressure to said unseating means.

4, m a drifting valve mechanism for locomotives, valve controlling the supply of steam from aboiler to a distribution valve chest, independently of the main" steam supply pipe,

anfactuating piston, oflarger diameter than.

said valve and connected thereto, a source of fluid pressure} supply independent of the main steam su ply pipe and mechanism,

actuated by di erences of valve chest presfluid pressure from the independent; source to the, actuating iston. I a

5. Ina rifting valve mechanism for loco sure, for controlling the supply of motives, the combination of an admission valve mechanism comprising an mclosmg the combination of an admission.

casing, a valve fitted thereinand, controlling communication between a boiler supply ing to a distribution valve chest, and a piston of lar r diameter connected to the' 'steam pipe and a delivery. steam pipe lead-' valve; a source'of fluid pressure independent of the ma n steam supply pipe, and a a piston therein subject on nicatlon fluid pressure and the "piston of. the admission valve mechanism.

JOSEPH niigninennn. CHARLES -F.- KAHLER;

Witnesses W. S. FRAME,

' J. D. FINN.

Histonmechanism comprislng an" between the independent source of

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