US1126900A - Cylinder-cock. - Google Patents

Description

A: E. STACHBL.

CYLINDER COCK.

APPLICATION FILED MAY 18.1914.

Patented Feb. 2, 1915` Z BHEBTSHSHET l.

Siacfl.

A. E. STACHEL.

CYLENDEB (300K.

APPLIGATIQN FILED mi' 18. um,

Patented Feb. 2, 1915.

2 SHEETS-SHEET 2.

therein. The cylinder TED sTa'iEs Fammi onirica.

mirage n.. srA'cHEL, or CHICAGO, "n.mnols.

Y cYLINnnacocxc ,Specieati on of Letters Patent.

Patented Feb. 2, 1915.

Application tiled-Mails, 1914. Serial No. 839,306.

may be controlled manually.

The invention consists-in a combination and arrangement of parts producing cer- "tain new and useful results to be described hereinafter in detail. In order that the invention may be better understood, reference is had to the accompanying drawings, in which- ,.Figure 1 is an elevation of the apparatus partly in section; Fig. 2 is a vertical section of a water-relief valve; Fig. 3 is a vertical section of a manually operated controlling valve, and Fig. 4 is a vertical section of a check Valve.

eferring speci cally to the drawings, 10 denotes one off the cylinders of a locomotive having 'bottom ports 11 at its ends to which are connected cylinder-cocks 12 for draining the cylinder of water. The cocks are operated by.a longitudinally slidable stem 13 in the ordinary manner, and as no novelty is claimed for these. parts, a furthzh` description thereof is deemed unnecessary.

At "14 is indicated a cylinder in which is slidably mounted a plunger 15 having a rod 16 which extends from both sides of the plunger and passes through stuiiing boxes l' on the heads or ends of the cylinder. One end of the rod 16 is operatively connected in anyv suitable manner to the stem 13, and its other end extends into a cylinder 18 and is connected to a plunger 19 working pot to retard the movement of the plunger 15, for a purpose to be presently described. The cylinder 18 is adapted to be filled with oil, and open communication between o posite ends of the cylinder is estblishe by means of a conduit 2O in which a regulating valve 20 is interposed. l

The cylinder 14 has fluid-pressure inlets the handle is released, 'the s 18 serres as a dash- l 21 and 22, respectively, ,at its ends. A conduit 23 leading from the exhaust port 24 of the cylinder 10 is connected tothe inlet 241. To the inlet 22 is connected a conduit 25. To the conduit 23 is connected a conduit 26. ln the conduit 23, .between the port 24 and the junction of the conduit 26 with said conduit 23, is a. spring seated drain valve 27 and a check valve 28, the latter having a small bleed port 29.

The conduits 25 and 26 extend from a valve comprising a casing 30 having outlets 31 and 32, respectively. The conduit 25 is connected to the outlet 31, and the conduit` 26is connected to the outlet 32. Between these outlets is an inlet 33 to which is connected a conduit 34 leading from a compressed air reservoir 35, whlch may be the lmain reservoir of the airbrake system. In the casing 30 works a turning plug' 36 which is constructed to establish communication between the inlet 33 andeither one. of the outlets 31 and 32. Normally, the plug covers both outlets and it is held in this position by springs 37 engaging the handle 38 of the plug. Upon swm `ng the handle to one side, the plug establis tion between the inlet and one of the Outlets, and when the handle is'swung over tothe other side, 'communication is established between the inlet and the other outlet. When rings restore it to neutral position to yclose oth'outlets.

The cylinder 14 contains ,a ,spring 39 which engages one side of the plunger 15 and serves to lforce the same toward one end of the cylinder. On that side of the plun ger which is engaged by the inder 14 has a vent port 40.

The end of the cylinder 10 is connected by a conduit 41 to an automatic water relief valve comprising a casing 42 in which works a plunger 43 having a stem-44 which carriesv valve 45 and one side of the plunger 43, and

on the other side of said plunger. the va-lye casing has a Huid-prepsureinlet 49 'connectspring, the cyl-` es communicaics 'lil

ed by a conduit 50 to the live steam port of (he cylinde 10.

The opeiiation of the apparatus herein before described may be summarized as follows: Thef normal position of the'plunger 15 is adj "cent to that end of the cylinder lil having the inlet 21, to Whfich position it is forced by the spring 39. when the plunger moves to this position, v[the stem 13 is actuated to open the cocks'12. When the throttle is opened to admit steam to the ycylinder 10, the exhaust steam passes through the conduit 23 and enters the cylinder 14 by the wayI of the inlet 21, whereupon the plunger 15 is forced forward against the tension of the spring 39 and the resistance ofl'ered by the dash-pot 18. This movement of the plunger actuates the stem 13 to close the cocks 12. The rate of speed at by the dash-pot 1S which can be regulated by the valve 20a. The cylinder cocks therefore close slowly and sulficient time is allowed for the escape of water from the cylinder 10. lVhen the throttle is closed to shut oftl the steam supply to the cylinder 10, the exhaust pressure ceases to act against the plunger 15 whereupon the spring 39 returns it to open the cocks 12. Here again the movement of the plunger is retarded by the dashpot so that the cocks will not open too soon.

The operation of the cylinder cocks 12 may also be controlled manually in the following manner: In starting the locomotive, if for any reason it is desired to close the cylinder cocks quickly, the valve handle 38 is swung to admit compressed air behind the plunger 15 by the way of the conduits '26 and 23, through the inlet 21. The air, by reason of its greater pressure than the eX- haust pressure, Will move the plunger quickly in a direction to close the cylinder cocks. rlhe cocks may also be closed in this manner while the locomotive is standing at passenger stations. When the valve handle 38 returns to neutral position, the air which was admitted to the cylinder 14 bleeds off slowly through the bleed port 29 in the check valve 28, into the conduit 23, and this, together with the dash-pot, will hold the cylinder cocks closed for short stops at passenger stations. While running, the cylinder cocks are normally closed, and should the engineer desire to open the same, hev would need only to admit air into the cylinder 14 through the conduit 25 and the inlet 22. rThis pressure will exceed theexhaast pressure which has advanced the plunger 15, and the latter is therefore returned to opening position. The valve handle 38 "utomatically returns to neutral position w en it is released, and in this position, I e plunger 15 is operated auto matically,v keeping the. cylinder cocks closed which the plunger 15 travels is reduced.

while the locomotive is running, and opening the same when standing. The exhaust of the air admitted into the cylinder 14 through the inlet is through the vent port 40, which latter also allowsuvater to he drained out of said cylinder. The drain valve 27 is designed for the purpose of keeping that part of the system drained of water. The check valve 28 retains the air vfhich is admitted into the cylinderA 14 through the inlet 21. The bleed port 29 is" open at all times and keeps the plunger 15 from being air-bound. which would prevent the automaticoperation hereinbefore described.

The purpose of the water-relief valve is t0 automatically elieet the opening of the ylinder cocks 12 if water should accumulate in the cylinder 1l) when running. The operation is as follows: Normally, the plunger 43iholds the valve 45 to its seat 46 by reason "of the live steam pressure on top of the plunger, and the fact that the area of the plunger is greater than the area of that portion of the valve which is exposed to the pressure in the cylinder lVhen Water accumulates in the cylinder the abnormal pressure created at the ends of the stroke of the piston" working therein, will unseat the valve 45, the pressure passing through the conduit 41 into the valJe casing 42 beneath the valve 4.5. This pressure then escapes through the outlet 47 and passes through the. conduit 48 into the cylinder' 14, and forces the plunger 15 in a directions to open the cylinder cocks 12. When thy excessive pressure is relieved, the plunger 43 is forced down by the live steam pressure thereagainst, and the valve 45 is reseated.

The advantages of the apparatus will be readily manifest to those skilled in the art to which it pertains. The cylinder cocks can be operated from the cab of the locomotive hy the engineer withoutinterfering with the automatic operation, and the cylinder cocks will be opened automatically when the locomotive is at rest, and when the locomotive is started. they will he closed automatically after the desired interval vof time, which may be va ried by the valve 20a. The engineer cannot leave the locomotive and let .the cylinder cvwks remain closed, as they will be opened automatically when steam is shut oli'. A leaky throttle has no effect on the cylinder cocks and they will open and remain open at the proper time. The automatic water-relief valve prevents damage of the cylinder by water when running. The automatic features cannot he rendered inoperative b v thel manually controlled devices as the valve handle 38 is normally in neutral position. The cylinder cocks will positively be open when the loco motive is in the engine house, and they will open even though forgotten by the hostler,

imaginer..

Hamid up? miv@ rig s fiugiressw@ w Gandini im puri,

f5. amufimt WEBS si steam engine 'tyinfar having cymsdsv soda; and @permiixg mesme fm' id. ffmks of me ni; 'for mmv aai-ing and mid ast'mngg the afm* water 'av@ d to me ends fr? m with a :steam engine @Minder coms, land operar wif] cocks; 0f means for ctw ating means? saiductxating ng a cyndm` n puger ing wenns? mmf; sind fr; 1119133111 GTRPT Working; in the cylinder, :i rod extending effect the manual control of the cylinder 10 from the plunger and operatively connected cocks.

to the aforesaid 'operating means means for In testimony whereof I ax my signature leading exhaust stemn from the engine cyl in presence of two Witnesses.

inflar inlo the last-mentioned cvlinder to Y more the plunger in A direction to Close the ARTHUR E' STACHEL' vjilinder cooks. und normally inoperative Witnesses:

and n'ialnuall)v controlled means for admit- OLIVER VVEIGLF.,

king flilid-inessurr into 'said cylinder to ERNEST L. BOTH.

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