US1661915A - Cylinder cock - Google Patents

Description

March 6, 1928. 1,661,915

A. ABBAMONTE CYLINDER COCK Filed May 2, 1924 Patented Mar. 6, 1928.

UNITED STATES ANTISTENE ABBAMONTE, OF CHEYENNE, WYOMING.

CYLINDER COCK.

Application filed May 2, 1924. Serial No. 710,607.

This invention relates to in'iprovement-s in automatic cylinder drain cocks of the type employed in connection with steam engines for the purpose of draining the water of condensation from the cylinders and has reference more particularly to improvements in the valve described and claimed in U. :5. Letters Patent 1,629,465, granted to me on May 24:, 1927.

it is the object of this invention to produce a cylinder drain cock that will auto matically open whenthe main throttle is closed as to prevent any accumulation of water in the cylinder, and which automaticull y closes when the main throttle is open, so as to prevent the escape of steam when the engine is operated. It is the further object to producea valve of this type that will automatically close when the engine is drii'ting so as to prevent cold air and dust from being sucked into the cylinder, and which shall be provided with means whereby the engine can move the same to open position while the engine is operating and while the engine is working with the throttle in fully open position.

Another object of my invent-ion is to provide a cylinder cock oi this type which shall have means associated therewith which will permit the valve to close at two difiercut pressures. The object of this last named means is to permit the valve to close at a very low pressure during ordinary operation of the engine, but which will prevent the valve from closing until the pressure is at least twenty pounds per square inch during such times as the engine is standing idle in the roundhouse. This prevents the engine from moving it there is a considerable leak past the throttle valve, as some times is the case.

The above and other objects which may become apparent as the description 'proceeds are attained by means or a construcand an arrangement of parts which will now be described in detail, reference for this purpose being had to the accompanying drawing in which the preferred embodiment has been illustrated and in which:

Fig. l is a side elevation of my improved drain cock;

Fig. 2 is a longitudinal section taken on line 22, Fig. 1, and shows .merely the cylindrical member from which the valves and end closures have been removed; a

Fig. 3 is a longitudinal section taken on plane 3-3, Fig. l, which is located at right angles to the plane on which Fig. 2 is taken; and i Fig. sis a section taken on line el4, Fig. 3.

'My invention comprises a hollow casing 5 which has an "opening extending entirely throughthe same. This opening has several sections, all 01' which are cylindrical and which are of diti'erent diameters. Adjacent the upperend oi the casing is a. cylindrical section that has been indicated by reference numeral (5. This section has a plurality of spaced inwardl extending ribs 7 that serve as centering means for a valve 8 which is provided with a valve stem 9. Between the cylindrical section 6 and the cylindrical section 10 I have provided an inwardly projecting valve seat 11 that is adapted to cooperate with the valve seat 12 on the valve 8, so as to form a steam tight closure. The cylindrical section 10 terminates in a short cylindrical section 18, which is of the proper size to receive the lower end of the valve stem 9 (see Fig. 3). A. spring 14 surrounds the valve stem and has one end abutting the shoulder 15 and the other abutting the underside of valve 8. This spring is under compression and tends to move the valve away from the valve seat. A plug 16 is provided with a threaded portion 1? that engages the thread cd section 18 in casing 5. This plug has an inwardly projectingconical member 19 that serves as a stop which limits the movement of the valve 8 away from the valve seat. Casing is also provided with a passageway 20 whose upper end 21 communicates with the cylindrical chamber 6 at a point between the valve 8 and the inner endo'l? plug 16. The other end of this passage terminates in a threaded opening 22 which is adapted to be connected by means of suitable pipes to one end of the engine cylinder.

The casing member 5 has a cylindrical outwarijlly extending projection 23 which is hollow and which coinn'iunicates with the cylin drical section 1.0. The opening 24 through the projection 23 serves as an exit for the steam or water which comes from the cylindcr and which passes between the valve seats '11 and the valve. Forthe purpose of preventing air and dust from flowing inwardly through the opening 24 I have provideda cover 25 that is provided with a lateral extension 26 which is located between the two lugs 27 and pivoted by means of a bolt 28 (Fig. 1). When there is a reduced pressure within the chamber 10, as when the engine is drifting, the valve25 will close, so as to prevent air and dust from entering the cylinder.

The other end or the valve is provided with a cylindrical chamber 261. and is closed by means of a screw plug 271, which has a threaded portion that cooperates with the threads 281 in the end of the casing. The cylindrical portion 261 terminates in a valve seat 29 and communicates with the cylindrical section 30 which in turn communicates with a cylindrical section 31 of reduced diameter. A piston 32 is slidably mounted in the cylindrical chamber 261; this piston has a piston ring 33 that makes a close lit with the walls of the cylinder. This piston is also provided with a valve seat 3t that cooperates with the valve seat 29 so as to form an air tight seal when the piston is in the position shown in Fig. 3. The casing is also provided with an externally projecting boss 35 whose inner surface is threaded as indieatcd at This boss is adapted to receive the end of a pipe, (1, which extends to a threeway valve, I) that controls air from the air supply c of the locomotive. A small opening 37 forms a. communication between the interior of the boss and the interior of the cylinder 261. When compressed air is admitted into the cylindrical chamber 261, between the end of the piston and the plug .27, the piston will be moved upwardly until it seats against the valve seat 29, after the piston has seated no air can escape from one side of the piston to the other as it might do if the sealing action oi the piston ring 33 were alone relied upon. The valve seat 29 and the corresponding surface 3% on the piston therefore serve the useful purpose of preventing the escape of air when this part of the valve is in operation. A stem 38 ex tends from the upper surface of the piston and terminates within the cylindrical chamber 31. Thisstem is provided with an annular flange 39 that serves to center the stem within the chamber 31. The parts are so adjusted that when the piston 3:2 is in the position shown in Fig. 3, valve 8 is held in open position. This valve an onlyclose by moving the piston 3-1 downwardly until it seats against the inner end of the plug 271. This is taken advantage of (or the purpose ()If increasing the pressure necessary to close the valve 8. The parts are so adjusted that when the piston 32 is seated against the plug 271 the valve 8 will close if it is subjected to a. steam pressure of from two to three pounds, but when the parts are in the position shown in F ig. 3, it requires the pressure of from 20 to 25 pounds to move the valve 8 into closed position. Thisi's due to the fact that when piston 32 occupies the position shown in Fig. 3, piston 8 cannot be moved towards closed position without moving piston 32. The pressure of the ring 33 against the wall of the cylinder produces friction nvhich must he overcmne in addition to the force ol the spring ll. Engineers are always required to open the cylinder cocks when the engine is stopped for some time as, for example, when it is run into the roundhouse. \Vhen an engine equipped with my valve, the engineer in moving the parts to open position, will manipulate a three-way air valve so as to introduce air pressure into chamber 261. This moves the piston 32 against the seat- 25) and when the air pressure is removed, it will remain in this position, until the valve 8 is subjected to sutiicent n-essure to move against the resistance of the spring l4- and against the force due to the friction of the alve stem 2 and the friction of the piston ring 33 against the cylinder wall, which, as above described, requires steam pressure of from twenty to tweuty-live pounds, and therefore there is no danger of the valve 8 being moved to closed position on account of leakage as above pointed out.

Two oi. the automatic valves above described are used in connection with each engine cylinder, one valve being connected to the drain opening at each end of the cylinder, by means of :1V pipe which extends 'l'roni the threaded opening 2: to the drain opening. An air pipe is connected to the threaded interior oi boss 35 in the manner above explained. The threaded opening 213 has its axis located at right angles to the axis of the opening 24 so that the lattcr will normally lie in a horizontal position. The valve member 2:) will normally rest lightly against the outer end of the projection 23 so that when the pressure on the inside is greater than atnn'ispherie, steam is permitted to flow outwardly through the opening :34, but it the pressure within the chamber 10 is less than atmospheric valve member 2:", will be moved against its seat and prevent air from entering. \Vhen the engine is equipped as above described and when the engineer opens the throttle and permits steam to enter these cylinders. some of the steam will attempt; to escape through the passage 22. The action of this steam is to close the valve 8 and to hold it .in closed position as long as the pressure exceeds the minimum pressure of three pounds which is usually required for holding the valve in closed position. When the engineer closes the throttle. the pressure within the passageway 20 will be reduced to such an extent that the spring, M will function to move the valves to open position. Any water oi condensatiim will now have. a tree passageway from the engine cylinder to the atmosphere, thus permitting the cylinders to drain.

lVhen the throttle is closed while the enginc is running, as, for example, in going Inn down a grade, the engine will act as an air pump and will reduce the pressure in passageway 20 to a point below atmospheric. Unless meansiare provided to prevent it, air and dust will be sucked into the cylinder at each stroke of the engine. To prevent this, the check valve 25 has been provided; If the engineer desires to open the cylinder cock while the engine is operating, he opens a valve which permits air to flow into chamengine cylinder when the engine is drifting,

and which is also provided with means for conveniently opening the cylinder cocks when the engine is operating and torintroducing an additional resistance against closin after an engine has been stopped.

l-Iaving described my invention what I claim as new is:

1. In a cylinder drain valve, in combination, a hollow casing having an internal valve seat near one end, a valve provided with a valve seat adapted to cooperate with the internal valve seat so as to close the opening, means comprising a springitor normally holding the valve away from its seat, saidcasing having a passageway adapted to be connected to the interior Off a steam engine cylinder, said casing having also another opening which communicates with the atmosphere, said last named opening being located on the same side of the valve as the spring and on the side of the valve opposite from. the first mentioned opening and a check valve in the last named opening which permits an outward flow but prevents an inward flow.

2. In a cylinder drain valve, in combination, a hollow casing having an internal valve seat near one end, a valve provided with a valve seat adapted to cooperate with the internal valve seat so as to close the opening, means comprising a spring fOl'TlOF- mally holding the valve away from its seat, said casing having a passageway adapted to be connected to the interior of a steam engine cylinder, said casing having also another opening which con'nnunicates with. the atmosphere, said last named opening being located on the same side as the valve spring and on the side of the valve opposite from the first mentioned opening, a check valve in the last named opening which permits an outward flow but prevents an inward flow and means comprising a piston :for exerting a force on the valvewhich actsin thesame direction as the force exertediby the spring.

3. A cylinder drain cock' comprising, in combination, a hollow casing having an opening. extending :from one end to theother,

means closing each of the end openings, an internal valve seat ad acent oneend, a valve in the casing between the valve seat and the adjacent cndclosure. means for limiting the movement of the valve away froi'n-tho seat, said (i-asing having a passageway opening into the interior thereof between the valve and the adjacent end cl0sure,said passageway being adapted to beConn-ecled with the interior of an engine cylinder, resilient means associated with the valve tornormally l'ioldnig it in open position and means for supplen'ienting the force of the spring and for movingthe alve to open position against pressure.

4. A cylinder drain cock comprisin in a l u e combination, a hollow' casing having an opening extending from oneend to theother,

means closing each of the end, openings, an mternal valve seat ad acent one end, a valve in the casing between the valveseatand the adjacent end closure, means for-limiting the movement of the valve away from the seat, said casing having a passageway opening into the interior thereof between the valve and the adjacent end closure said passage- 7 way being adapted to-be connected with the interior of an engine cylinder, resilientmeans associated with-the valve tor normally holding it in open position and means for supplementing the force oi. the spring and for moving the valve to opeirposition against pressure, said last named means comprising a piston adaptedto be moved in one direction by 'meansof compressed air-and means associated with the piston for engaging and moving the *alve.

5. A cylinder-drain cock comprising, in combinal'ion, a hollow casing having an opening extending from one on d to the other thereof, plugs closing the openingsin the ends. the inner surface oi said casing being provided with two valve seats, one near each end closure, a valve member mounted formovement in one end (it the casing between the one valve seat and the end closure, a stop for 6. A cylinder drain cock com rising, in combination, a hollow casing iaving an opening extending from one end to the other thereof, plugs closing the openings in the ends, the inner surface of said casing being provided with two valve seats, one near each end closure, a valve member mounted for movement in one end of the casing between the valve seat and the end closure, a stop for limiting the movement of the valve away from the seat, resilient means comprising a spring for normally holding the valve against the stop, a piston located in the other end between the valve seat and the end closure, said piston having a surface adapted to cooperate with the valve seat to form a seal, said casing having an opening that communicates with the space between the end of the piston and the end closure, means associated with the piston for moving the valve from its seat when the piston is moved towards its seat, and means for preventing air to How inwardly past the piston when the latter is in open position. I

7. An automatic drain valve of the class described, comprising, in combination, a casing having two chambers connected by a passageway, means closing the ends of said chambers, each of said chambers having valve seats, a valve member located in one oi said chambers between the valve seat and the end closure, means comprising a. spring for normally holding the valve away from its seat, said casing having a passageway one end of which is in connnunication with the chamber containing, the valve and the other end of which is open to the atmosphere and adapted to be connected with the interior of an engine cylinder, a piston slidably mounted in the other chamber between the valve seat and the end closure and means associated with the piston for moving the valve towards open position when the piston moves towards the valve seat with which it cooperates.

8. An automatic drain valve of the class described, con'iprising, in combination, a casin; having two chambers connected by a passageway. means closing the ends of said chambers, each of said chambers having valve seats, a valve member located in one of said chambers between the valve seat and the end closure, means comprising a spring for normally holding the valve away from its seat, said casing having a passageway one end of which is in conmmuication with the chamber containing the valve and the other end of which is open to the atmos phere and adapted to be connected with the interior of an engine cylinder, a piston slid ably mounted in the' other chamber between the valve seat and the end closure, means associated with the piston for moving the valve towards open position when the piston moves towards the valve seat with which it cooperates, and means for preventing the how of a fluid past the valve and into the passageway when the valve is in open position.

9.1 1, cylinder drain cock comprising a casing having a chamber whose walls is formed with a conical surface forming a valve seat, means for closing one end of said chamber, a valve located in the chamber bctween the valve seat and the end closure, said casing having a passageway, one end of which is in con'nrmnication with the chamber between the end closure and the valve, said casing having also an outlet whichcommunicates with the chamber on the side of the valve seat opposite the end closure, means comprising a spring for normally holding the valve member away from the valve seat and means for supplementing the force exerted by the spring with a frielional resistance that must be overcome helorc the *alve can be moved against the seat.

10. A cylinder drain cock comprising a casing having a chamber whose wall is formed with a conical surface forming a valve seat, means for closing one end of said chamber, a valve located in the chamber l'letween the valve seat and the end closure, said casing having a passageway one end of which is in C(HI'HHIIHlCiltltHl with the chamber between the end closure and the valve, means comprising, a spring for moving the valve towards the end closure for opposing a force to any closing movement of the valve and means .toadding a force that opposes the movement of the valve from open towards closed position, said casing having an outlet opening located on the side of the valve opposite from the end closure and means for closing said opening when the pressure within the chan'iber is less than :ll'll'lOSPllQl'lC.

In testimony that I claim the foregoing as my own, 1 have hereto allixed my signature.

ANTI STENE AB BAMON'IE.

IUD

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