|Publication number||US1319404 A|
|Publication date||Oct 21, 1919|
|Filing date||Aug 5, 1918|
|Publication number||US 1319404 A, US 1319404A, US-A-1319404, US1319404 A, US1319404A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (5), Classifications (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
A AAQGU'IIRE AND J. M. BONG.
STEAM CYLINDER DRAIN VALVE.
AVPl-ICATION FILED AUG.5. 191s.
LEWAAP A Patented 0m. 21,1919.
I! ATTORNEY iii urn
il t li DEAIN-VALV To all whom it may concern Be it known that We Jenni; h/l oGnn n and JOHN 1V. Bone, both citizens of the United $tstes and resieients Hiiltvuuhee, in the county oat Milwaukee end State, of Wisconsin, have invented certain new and useful "improvements in Sitcom-Cylinder llrain-Velves; and We do hereby declare that the following'is a full, clear, enrl. enact description thereof.
@ur invention relates to new and usetul improvements in drain valves for the cylinclers oi steam engines, more particularly oi? that type essocietecl with the piston cylinders of locomotives.
iiucli valves are normally urgecl to open position, draining the cylinder, When the engine is not running, ahcl ere held closed. steem pressure in the cylinder (luring operation of the engine. Due, lni vveve: to therelatively cool cylinrier in initially tartingthe engine, a heavy condensation of steem occurs at that time with a consequent consiueralole accumulation meter in the cylintien it is therefore primarily the object our invention provide it steam cylinder clrain vnlve Which they he operated: to carry off, cluring operation of the engine, heevy accumulation of Water ct condensation which occurs upon starting up such opera tion I lit is further object to provide volve oi this cheracter which they else serve to vent the cylinoler of n iocoinotive when the locomotive is coasting, enol thus prevent the occurrence of returoling pressures in the cylinder.
A still further object resitles in the pro" vision vnlve oi this character which is exceedingly simple encl duruhle in construction encl susceptible of ready operation for the novel functions stetetl.
With these encl other objects view,
'Which Will he apperent es t e description pi'oceeois, our invention resides in the novel features of construction cornloinetion enc'i errangement of parts as hereineiter described and defined by the eppenelerl cleini it lasing understood that, changes in the precise emloodinient might he made loy those shillecl in the nrt Without ole certing from the spiritof the invention.
specification oi ltetters ltatcut.
eppiiention files August t this.
- openin Patented tictn 211, with isciial lilo.
This invention in one practical form in vvhich it may be embodied is illustrated in the accompanying drawing in which:
Figure l is a vertical iongitudinai sectional view through our improved stean'i cylinder drain valve.
Fig. 2 is a transverse sectional View there through on the line 2% oi 1.
Referring now more particularly to the accompanying drnwin s, 5 designates the depending hollow boss of one sort of a locomotive piston cylincier, which is adapted to receive the clruin valve. @ur improved strain valve comprises an upper casing sec tion 6 which has its upper end portion slightly reolucetl for threaded engagement in the hose 5 anti terminating in a valve seat '21 The bottom 8 of the upper casing section is provideclvvith central bore in which is iliahiy mounted: the stem 9 of a valve head 11 adapted to engage on the sent '2', the valve seat being spacecl sufiicient distance from the inner periphery of the cylinder that the valve (loos not project therepest in movemen lower portion. of the Lip d-er casing section is proviclecl with an outlet port iii, encl the upper suriace'oi the bottom 8 is irustoconical in shape whereby to v efiorci complete drainage of Water through said outlet port from the casing. The mouth of a lower cup-shaped section 13 is threaded on the bottom it the upper section encl stem 9 exteiicls into this lower section anti carries a piston sliclehle therein saicl stern having its lower end portion reclucecl to form a consequent shoulcler ens-ages lay the piston. lThe valve is normelly urged to reiseoi position in the absence pressure in the steam cylinder by en eiipnnsiie coil sp ing 15 having one encl seeteci in recess oi the piston and its other end seetetl in on inner countersunk portion of en attaching; nipple l6 projecting from the hottoin off the lower casing section. Threuolecl in this nipple is e pipe 1'? which extends to one port of a three-Way valve 18 having its other port communicating respectively with a pipe 19 leading" to suitable source oi. compressed air, encl With the ionosphere.
.in operetion, the spring 15 hohis the valve open in the absence of operating pres- L sures in the steam. cylinoler to thus permit free drainage of the cylinder to prevent damage from freezing. This is the general operation of the conventional drain valves. lVhen the operation of the engine is started and a heavy condensation occurs in the cylinder which it is highly desirable to drain off, the valve 18 is operated to admit compressed air through the pipe 17 into the lower casing portion 13, to thus raise the piston and open the valve against any steam pressures which may occur in the cylinder, thus providing a drainage simultaneously with full operation of the engine. It is noted that opening movement of the valve is facilitated by the fact that the area of the piston 14 is considerably greater than the area of the-valve head 11. In valve opening movement, the outer peripheral portion ofthe piston seats against the corresponding portion of the bottom 8 of the upper casing section and thus leakage of the compressed air is prevented, the intermediate portions of the opposed faces of the piston and casing section bottom being cupped to facilitate this engagement. Upon proper drainage of the steam cylinder, pressure is relieved in the casing section 13 by opening the three-way valve 18 to the atmosphere, and the steam cylinder pressures will close the valve 11 against the action of its lifting sprin 15.
When a locomotive is coasting, air pressure will be introduced into the casing section 13 to hold the valve 11 open during the period of coasting and thus vent the steam cylinder to prevent the occurrence of retarding pressures therein.
An exceedingly simple and durable arrangement has thus been provided whereby the steam cylinder of a locomotive may be, at any time, vented for the purposes set forth, regardless of pressure conditions in the cylinder.
What is claimed is:
A valve of the class described comprising a cup-shaped upper casing section provided with an outlet port and having its upper portion threaded for engagement in the drain outlet of a cylinder, said casing section being cupped in its bottom surface to afford an annular bearing face and having its lower peripheral portion threaded, a cup-shaped lower casing section having its mouth threaded on said lower portion of the upper casing section and provided with an air port in its bottom, a stem slidably passed through the bottom of the upper. casing section, and having its lower end portion reduced, a valve head on the upper portion of the stem for closing said upper casing section, a piston disk on the reduced lower portion of the valve stem and slidable in the lower casing section and having an annular bearing face on its top adjacent its periphery engageable against the bottom bearing face of the upper casing section, a projection on the piston disk adapted to extend into the cupped portion of the upper casing section, a nut threaded on the reduced portion of the stem for holding the piston disk, the bottom of the piston disk and the bottom of the lower casing section being provided with opposed recesses and an expansile coil spring disposed between said parts with its ends engaged in the recesses.
In testimony that we claim the foregoing we have hereunto set our hands at Milwaukee, in the county of Milwaukee and State of Wisconsin.
JOHN M. BONG.
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