US1145798A - Drifting-valve. - Google Patents

Description

A ROSS. DR IFTING VALVE.

APPLICATION FILED AUG.25. 19I3.

WITNESSES #ww By W ATTORNEYS Ltd - standstill.

lowing is a full, clear,

' constructed and i It ALONZO ROSS, 0F JERSEY CITY, NEW JERSEY.-

DRIFTING-VALVE.

Lild5,'?98.

Specification of Letters Patent.

Application filed August 25, 1913. Serial 0. 786,428.

To all whom it may concern r 5 Be it known that I, ALONZO Ross, a cit zen of theUnited States, and a resident ot Jersey City, in the county of Hudson and State of New Jersey, have invented a new and Improved Drifting-Valve, of which the fol-, and exact description.

Among the principal objects of the present invention are: to avoid sudden cooling of the cylinders when the power steam is cut off to avoid the overheating or dry-heating of the cylinders, with the consequent carbonizing and burning of the cylinder coating; to lubricate the cylinder during the period in which the engine is running on its momentum; to provide a mechanism to auto-- matically supply steam to the cylinders for the accomphshmentof the above-stated objects, when the power steam is cut 03; and to provide means for automatically sus nding the operation of the above-mentloned mechanism when the engine is brought to a was of a relatively lbw heat 'or ressure, this method operated suficiently "we to accomplish the purpose for which it was intended. In late times, however, since the introduction of superheated steam and the higher pressure steams, the increased heat thereof, being transmitted td the cylinders, raises the temperature of the walls thereof to a degree where they will crack when the relatively cool air. from the inlet valves is received cylinder. A large proportion of cylinder 4 troubles has been traced Within the last few at finders,

operate the en years to this deficiency in the structure, and it is the object of the present invention primarily, to overcome this by permitting a diminished supply of steam, insuificient to abut suficient to break the vaeu cause by the piston within the said to enter the cylinder. :Vi

When the steam supplied 7 within the highly heated object in view, a valve casing 7 is provided with a neck 8, screw-threaded as shown in Fig. 1 of the drawings, for mounting at any convenient station for connection with the cylinder, steam-chest or saddle, of the locomotive. The casing 7 is provided with a valve chamber 9, wherein a valve 11'is disposed, and opening into which is .a relatively small steam. pipe connected rigidly to-an equalizing piston 12 by means of a valve stem 13.

10. The valve 11 is Patented July d, 1915. 1

The valve 11 is provided with a seat 14 adjacent the open-ingof the enlarged chamber 15 with which the neck 8 is provided. Surrounding the valve 11 an upstanding flange 16 operates toiprtvent cocking the valve. The spider .wings\17 are pendent from the valve 11, and server as guides there for. The valve is further guided in service by the piston 12, which operates in the chamber 18 formed in the screw-threaded neck 19. The neck-l9 forms a closure memher for the chamber 9, the opening in the neck thereof being suficient to permit the introduction of the valve 11 therethrough.

The disparity in size of the piston 12 and the valve 11 sure on the valve'll over and above that under the piston 12'when introduced thereon by the steam in. the chamber 9, admitted thereto by the pipe 10.

ton 12, however, a'p roximates the pressure provides for an excess of pres v The lift on the pison the valve 11 en cZently close to nearly balance or float said v Ive; to permit the lift thereof quickly andr'jeadily. The valve 11 is lifted by a vacuu formed by the operation ofthe piston in the power cylinder and transmitted to the steam-chest or other steam-supply of said cylinder.

The stem 13 is extended above the portion 12, and is provided at the upper end witha screw-threaded section 20, whereon is mounted a The piston 21 is contained in the chamber 23, the solid cap 24 formingwhich is. bolted piston 21 and a holding nut 22.-

to the plate 25 to form a. substantially air tight-and steam-tight joint therewith. The

piston 21 is suitably packed or fitted in the chamber 23 to hold the vacuum formed in the chamber 23 by the withdrawal of the air therefrom through thetubular passage 26 formed in the stem 13 of the valve 11.-

The tubular passage 26 is open-ended, placing thereby in direct communication the chambers 16 and 28,

or the cylinder and any rapid effect is produced within the chamber 23.. to lift the valve 11,

This vacuum is suflicient due tothe equalizing effect of the piston 12- 'within the chamber 9. When the valve 11 is lifted, the supply of steam from the pipe 10 flows through the seat 14 and by "way,

of the chamber 15to the cylinder and steam chest. Asabove stated, the supply of steamfurnished by thepipe 10 is; 'insufli cient' to operate the engine,f:but vis ample to prevent reduction in; .heat [of 'the' walls condition bylnoting the rise and fall of said 'made without modifying the invention. Also, it will be understood that though the a tubular passage 26 communicating with the chamber 23 and the cylinder, or steam-chest,

"of the engine, is shown as passing through necessary lubrication to prevent wear of the piston and valve in the cylinder and chest.

When, I 1s stopped,the v.acuum formed by the operation of the" piston .in the power cylinder dctermines, and the weight of'the'piston 21', 12 and valves '11 operates to stem 13, piston I seat the same until'the excess of pressure,

due to the extra area ofv the piston 12, operates to positively seat said valve. Thus the determination of in the course of operation, the engine ders' by.

the stem 13, it will, nevertheless, be understoodthat-the chamber 23 may be placed in; communication with the cylinder or steamchest directly, or by a connecting pipe. thereof, and is also sufficient-to provide any.

desirable to mix oil, for lubrication purposes,-twiththe steam admitted to the cylinthe drifting valve, this could be readily accomplished by placing an oil cup the operation of; the drifting valve. -constructed and arranged as herein described is Y automatic, as wellas the inauguration thereof. When thepower, steamis admitted-to the power cylinder and steam-chest, it passes.

from thence to the. chamber 15 through the (through the stem 13, and

area of the valve 11 over the,

(mother suitable supply on the cap 24, to be drawn therefrom by the suction of the vacuum:.;produced in the cylinder, down mix with the steam coming from the drifting valve, which would'carry it along and distribute the oil the same as'when tle steam.

I 'claim' z' The combination of two. steam supplies,

the engine is using throt- 'said=.supplies. having different .pressures;

t p ge 26.-to'-the chamber23, an

exerting thereafter a pressure on the; relfatively large area of said piston 21, itmain- {tains seated the valve 1l. It isonly after the suspension of the supply of power steam ascertain whether that the above described action occurs. It is to preventthe possible accumulation of pressure in the chamber 18, due .to

leakage of the high-pressure steam past the piston 21 and the stem 13 to the chamber 18, that I furnlsh the passages. 27. If the steam itself passes into the chamber 19, it

will find exit by way of the passages 27, and

so apprise the engineer, inspectors or others of the fact that the piston 21 needs attention. To permit the retraction of the piston 21, and to avoid the formation of" a vacuum therein, I have provided an opening 28,

which is sufficiently large to avoid the for mation of any vacuum or suction under the said piston, while permitting the extension therethrough of a tell-tale pin 29. By means a of the tell-tale pin 29, the engineer, in-

spectors or others may readily and quickly the valve is in operative Gap tea 9! tlflepetent may be obtained. for

'. supplies and a drifting valve comprising a valve casing having two inlet openings adapted to be operatively connected with said steam a valve seat formed in saidcasing intermediate said inlet openings; a valve corresponding with said seat for closing the passage under said seat, said valve being {adapted .to: receive pressure 'of' the steam] delivered to said casing" through the other inlet opening p,

a pressure chamber concen f'tric with said valve seat; a piston reciprp catively mounted in saidchamber; an openended tubularvalve stem operatively connected and forming a passage through said piston and said valve; and means" mounted on said stem for providing lifting pressure on said stem and parts connected therewit to partially balance the seating pressure of said valve;

In testimony whereof I. have signed my name to this specification in the presence of two subscribing witnesses.

ALONZO ROSS.

Witnesses:

E. F. Munnocx, lHILIr D. ROLLHAUS.

five cents each, by addressing the Commissioner of; Patents. h Washington, 1). G.

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