US795134A - Cylinder drainage and relief valve. - Google Patents

Description

110.795,134. PATENTED JULY 18, 1905.

B. J. JONES. CYLINDER DRAINAGE AND RELIEF VALVE.

APPLICATION FILED APB.11.1905.

WWE-255% Nrrn l STATES Patented July 18, 1905.

y l mien.

.PATENT CYLINDER DRAINAGE AND RELIEF- VALVE.

SPECFICATIGN forming part of Letters Patent No. 795,134, dated July 18, 1905.

I Application filed April 1l, 1905. Serial No. 254,919.

T0 all whom, t may conc-07%:

Be it known that I, BARTON J. JoNns, of Cheyenne, 1n the county of Laramie and State of Wyoming, have invented certain new and usefulImprovementsinOylindcrDrainageand Relief Valves; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

rIhis invention is an improvement in cylinder drainage and relief valves; and its object is to dispense with the usual valve-riggingsuch as slide-bars, levers, cams` Sac-ordinarily employed on locomotive-cylinders to control the drainage-cocks and relief-valves thereof and to provide a simple, eiiicient, and reliable valve which is controllable by air or steam pressure which can be regulated by a three-way valve in the engine-cab.

My valve contains a waste or drainage outlet and a relief-outlet, both closable by proper valves, the waste or drainage Valve being normally opened by a spring', but closable by air or steam pressure, While the relief or water valve is normally closed by a spring and comes into active operation only when the drainage-valve is held closed and excessive pressures are produced in the cylinder. The drainage-valve will keep the steam-cylinder free from water of condensation and also serves as a cylinder-cock, and the apparatus will lessen the expense of the maintenance of the cylinders in good condition.

I will now describe the invention in detail in connection with the accompanying drawings, which illustrate the same clearly. and refer to the claims following the description for summaries of the features for which protection is desired. V

In said drawings, Figure 1 is a side elevation of an engine-cylind er, showing lmy valves attached thereto, one valve being in section and showing the drainage-port open. Fig. 2 is an enlarged section through one of the valves, showing the drainage-valve closed.

The device is primarily intended for the cylinders of locomotives, but is, of course, applicable to other engines.

In the drawings, A designates one of the engine-cylinders, in which operates a reciprocating piston B in thc usual manner. One of my improved valves is attached to each end of the cylinder, and as these are duplicates and connected to the cylinder-heads in the same manner an explanation of one will fully explain both.

The valve comprises a casing 1, having an exteriorly-threaded nipple 1, which is connected by a union 4L with a flanged pipe 4, firmly attached to the cylinder-head and communicating with the interior of the cylinder at one side of the piston, as shown, and at such a point that water of condensation in the cylinder can drain through pipe 4 int'o casing 1. Casing 1 also has a depending pocket 1", having a valve-seat 1c at its upper end and an aperture lL1 at its lower end for the passage of the stem 8a of a valve 8, which is adapted to close on seat 1C, but is normally upheld by a coiled springQ, interposed between valve 8 and the bottom of pocket lb, as shown. In the pocket, near its lower end, is an aperture 1e, through which water or steam can escape or air enter when valve 8 is open. Above valve 8 is a short cylinder 2, having an exteriorly-threaded neck 2 on its lower end engaging a corresponding interiorly-threaded collar 1f on the upper end of casing 1, the bottom of cylinder 2 having an aperture 2b, through which passes the rod 7a of a piston 7 which works in cylinder 2, and said rod is attached to valve 8, being in axial alinement therewith. The piston- 7 is suitably packed in cylinder 2, as at b. The upper end of cylinder 2 is closed by a cap 5, having a contracted neck 5, exteriorly threaded and connected by a nipple 6 with the end of a pipe 6a, which leads to the engine-cab (not shown) or other suitable point and is connected with the air-reservoir or steam-space by a valve 6b of any suitable construction, so that the engineer can at will admit steam or air into the cylinder 2, so as to drive piston 7 down and close valve 8. compressing spring 9. When the valve 8 is thus closed, as shown in Fig. 2, communication is closed between the cylinder A and the atmosphere, and the escape of steam or water from the cylinder or entrance of air thereinto is prevented. In case of excessive pressure in the cylinder A, however, the iiuid is permitted to escape by the valve 10, which is IOO seated on a seat 1g in a threaded extension l of casing l opposite extension la. taehed to this extension l is a perforated cap 3, whose inner end is internally threaded and screwed onto exterior threads on part l, as shown. This cap 3 is provided with a cylindric cup 3, projecting inwardly from its outer end in axial alinement with valve 10, and within this cup is a stout helical spring 14, interposed between Valve lO and a follower' 11 within the cup, said follower bearing against an adjusting-screw 12, tapped through the end olE cap 3 and by which the pressure ol the spring on valve 10 can be adjusted to any desired degree, and when adjusted screw 12 is locked by a nut 1B thereon. The cap 3 keeps the spring in position and protects it from becoming clogged by cinders, &c.

Operation: 'I'he described valves are placed, as shown, one at each end of the cylinder A., and their cylinders 7 both connect with the saine controlling-pipe 6, so that hoth Valves 8 can be closed or released simultaneously. NVhen the engine is idle or just starting under load, pipe 61L should be vented, so that springs 8 can raise valves 8, allowing the water ol condensation to escape through apertu re 1. After blowing outthe water the engineer admits air into cylinders 2, thereby forcing down pistons 7 and closing valves 8, holding them closed during the working operations ot' the main piston. It while valves 8 are thus closed water should eyenter or accumulate in the main cylinder or il for any reason excessive pressure is developed therein, valves 10 will vbe unseated and relieve the pressure by venting the cylinder, valves l() closing automatically when the excessive pressure is reduced to the workinglimit. The amount of pressure required to unseat valve 10 is regulated by the pressure exerted by spring 14 thereon. When the engine is coasting. cylinders 2 can be vented through pipe 6, allowing Valves 8 to raise, and then air can pass back and forth to and 'from the main cylinder.

It will be seen from inspection of drawings that all parts ot' the valve may be reached without having to disconnect it from the cylinder.

Having thus described my invention, what I claim as new, and desii'e to secure by Letters Patent, is-

1. ln combination with an engine-cylinder, a valve-casing connected thereto having a pocket, a vent-opening in the pocket, a valveseat at its inner end above the vent-opening, a valve adapted to [it on said seat, and a spring within the pocket adapted to lit't the valve and hold it normally uiiseated; with a small cylinder above the casing, a piston therein having a rod connected with the valve, and a pipe adapted to admit iiuid into said small cylinder to seat the valve, and an engineers valve in said pipe whereby the admission or venting of iiuid therein can be manually controlled, substantiallyas described.

2. In a drainage-valve the combination of al casing having a depending poclet,a vent-opening in the lower part of the pocket communieating with the atmosphere, a valve-seat at its upper end, a valve adaptedto {it on said seat, and having a stem projecting through the pocket, a spring' within the pocket adapted to lilt the valve and hold it normally unseated; a small cylinder above the casing, a piston therein having a rod extending into the pocket and connected with the valve, and means for adniitting'l'luid into said small cylinder, above the piston therein to seat the valve, substantially as described.

3. In coiiibinationwitli an engine-cylinder, a valve-casing connected therewith at one side having a depending pocket provided with an aperture in its bottom, a vent-opening in its side and a valve-seat at its upper end; asmall cylinder connected with said casing opposite the pocket, a piston in said cylinder; a valve in said casing adapted to close on said seat, a valve-stem extending through the pocket, a spring interposed between the valve and the bottom ot' the pocket, a rod connecting the valve with the piston in the small cylinder, a iiuid-pressu re pipe connected with said small cylinder a manually-controlled engineers 95 valve connected'with said pipe to admit air therein or vent the same, and a relief-valve connected to said casing at one side of said drainage-valve, substantially as described.

4. In combination with the drainage-valve loo easing and drainage-valve therein, of a reliefvalve in the drainage-valve casing, a perforated cap attached to said casing exterior to and around the relief-valve, and having an internal cylindrical cup, a helical spring in said cup bearing against the relief valve, and means for adjusting the pressu re of said spring, substantially as and for the purpose described.

5. In combination with the drainage-valve casing and drainage-valve therein, means for holding the drainage-valve normally open, and fluid-controlled means for closing said valve; of a relief-valve in the drainage-Valve casing at one side of .the d rainage-valve, a perforated cap attached to said casing around the relief-valve, and having an internal cylindrical cup, a helical spring in said cup bearing against the relief-valve, an adjustingscrew tapped through the said cap, to regulate the pressure o1 said spring, and a fol- 120 lower-plate interposed between the screw and the relief-valve spring, substantially as and for the purpose described.

In testimony that I claim the foregoing as my own l aitix my signature in presence ol two witnesses.

BARION J'. J ON ES. lVitn esses:

l). (iLL, J. V. ELLis.

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