USRE12136E - Steam-cylinder drain-valve - Google Patents

Description

N0. 12,136. i REISSUED JULY 28,1903.

H. WQMoOOMBS. STEAM'GYLINDER DRAIN VALVE.

APPLICATION FILED JAN. 9, 1903.

UNITED STATES Reissued July 28, 1903.

PATENT OFFICE.

HENRY W. MCOIOMBS, or sosron, MASSACHUSETTS.

STEAM-CYLINDER DRAIN-VALVE.

srncmrca'rron forming partof Reissued Letters Patent No: 12,136,dated July 2e, ieos.

Original No. 615L878, dated June 19,1900. Application for reissue filed January 9, 1903. Serial No. 138,440.

ments in Steam Gylinder Drain-Valves, of

'which the following isa specification.

My invention relates to improvements in apparatus used in drainingthe cylinders of locomotives,stationary and marine engines,

and in other allied uses whereit becomes necessary to liberate the moisture from the cylinders. I

The objects of my invention are toeifectually and quickly empty the cylinders of the condensed steam through the employment of improved-drain-valves actuated by steam or compressed air through pipes communicating therewith and whose action is governed bya supply-cock located in the cab or engineroom, where it can be manually operated by 1 I attain these objectsby'the the engineer. mechanism illustrated in drawings, in which- Figure 1 represents in perspectivea locothe accompanying motive equipped with my improved appara tus. Fig. 2 designates-the engiueers valve in transverse central section governing the supply of steam or air to the cylinders in a position to open the steam-cylinder cocks, Fig. 3 being a similar view, but with the steam or air ducts in reversed position to close said cylinder-cocks. Fig.4 is also a like view with the ducts in normal position and the ports closed. Fig/5 is a side elevation of thefour-way supply-cock and its conneetio'ns.- Fig. 6 illustrates a front elevation of the same to exhibit the method of pros scribing the'movements of the operating-levver, Fig. 2 being a side elevation or external view of. one. of the-supplemental cylinders and Fig. 2 a similar position of a like valve in longitudinal section with the ordinary cylinder-cocks iu'vertical central section supporting said cylinders, each of the latter viewsi being supplementary and forming a part of Fig. 2. v

Corresponding letters of reference designate like features throughout the several' views, referring to which- I A represents a locomotive. in the cab of which is located the en gi'neers four-way valv'e, placed in any convenient position, asat B.

Steam or air pipes C 0 connect saidvalve with the supplemental cylinders DD, situ ated at the lower line of each of the steamcylinders. \The function of the seyeral parts, with their construction, will appear in the further description, commencirrgv'vith Fig. 2 herein. The situation of the lever E indicates the open position of the valve I in the drain-cocks J, theplug F being semirotated from its normal position, Fig. 4, so that the lower end of its transverse duct F communicates with the pipes O and its uppe'nend with the port B, communicating with the pipe G, leading from the steamer air supply, at:-

the engine-room, and w ich is. conveyed to the cylinders DXD through said pipe 0 and duct G entering the cylinder ends D D- simultaneously, actuating longitudinal] y the sliding tapered or wedge-shaped pistons H H.

in'a direction to open the valves Ifofthe drain-cocks JJ. in the position shown in Fig.

2. Obviously any series of pistons Hare in like manner actuated; but for thepurpose of this description I confine myself to the ducessibly situated in the locomotive-cab or in valve B be reversed tolthe position shown in 1 I Fig. 3, then its transverse duct F is rotated to a position establishing communication from the steam or air supply through the pipe G, port B, to port B to pipes C, duct C, and cylinder ends D D', such action simultaneously reversing the former position of the sliding taper pistons H H, and thus closes the valves I I of the drain-cocks J. The open position of said valves is well observed in Fig. 2. Here the valve-stem K is raised by the piston H, lifting the valve I from its seat L and opening the drain-cock J, permit ting the ,condensation to escape from the steamcylinders through the drain-vents M M. Drip-vents R R serve to keep the cylinders D D free from any moisture that maytend to'collect therein.

Reverting again to Fig. 2, the position of the radial port F opens into the portB and" the pistons H H, if any, remains inthe cylinder-chambers D returns by the pipes C O, and escapes through the transverse port B in the direction of the arrow 2 and through the exhaust-pipe N to the outer air. The reversed position of said plug F, as in Fig. 3, obviously exhausts any latent steam or air from the oppositeends of the cylinder-chem? bers D, in a like manner returning through the pipes O, portB radial port F and transverse port-F to the exhaust'N and out again.

A bracket S, attached to any convenient part of the boiler inside the cab, supports the valve B through the medium of the stud and nutT, as in. Fig. 6;

Q0 change the position. of the pistons H H independently of steam or air pressure, they may be manually actuated by the handles U U, properly packed through the ends of the cylinders D-D', the ends of said handles being secured to the ends of the said pistons.

To secure the lever E from accidental displacement, a spring-actuated pin 0, Figs. 5

and 6, is inserted in the inner side of the lever-shank O, which falls into a recess P in the face of the valve B, (when in its normal position,) while the spurs or ribs Q Q prescribe the swing of the lever E within the radius of its proper action.

The normal position of the valve B when the train is in motion is as exhibited in Fig.

4, the aforesaid manipulation of the same be-- in g only necessary when it is desired to empty or drain the steam-cylinders ot' the condensed steam.

My improved device accomplishes the purposefor which it is designed expeditiously and efliciently and insures greater economy and convenience when repairs are necessary than in similar devices at present in use, and while I have illustratedthe preferredmethod of constructing my invention I desire not to be confined to the strict interpretation thereof as herein set forth, but may employ such cock of a locomotive, of a drain-cock-operat- I equivalents therefor as would come within the fair scope and spirit of my invention, which, briefly stated, consists in providing, in connection with a cylinder drain-cock,a-valve operating device or motor actuated by fluidpressure, a conduit connecting said device with a supply of fluid under pressure, and a valve in that conduit for controlling the passage of fluid under pressure through said conduit.

What I claim isl. The combination with the cylinder draincock of a locomotive, of a drain-cock-operating device actuated by fluid-pressure; normally closed conduits for connecting said device with a supply of fluid under pressure, and means accessible to the engineer from within the cab for connecting either of said conduits with the supply to the exclusion of the other conduit, and for duits at once.

2. The combination with the cylinder draineither conduit is opened to the supply, and

to supply.

cockof a locomotive; of a drain-cock-operatpp y state of pressure equilibrium for operating cock of a locomotive; of a supplemental cylclosing both con extends; a wedge-shaped piston in said cylipg deviceactuated by fluid-pressure; a pair of normally closed conduits .for connecting said device with a supply of fluid under pressure, and a duplex valve normally occupying a. neutral closed position and accessible to the engineer from within the cab by which the other to exhaust, or both conduits closed 3. The combination with the cylinder draincock of a locomotive, of a drain cock-.operating device actuated by fluid-pressure, a pair I of conduits connecting said device with a supply of fluid under pressure, anda valve normally occupying a closed neutral position and accessible to the engineer for controlling said conduits adapted to occupy three positions, viz., with both conduits closed when in normal position, with one conduit open to v the supply of fluid-pressure to the exclusion of the other when in another position, and with the other conduit open to the supply of fluid. under pressure to the exclusion of the first when in its third position. v

4. The combination with the cylinder draining device actuated by fluid-pressure; a pair of conduits connecting said device with a of fluid under pressure; and a valve normally occupying a closed neutral position and accessible to the engineer for controlling said conduits adapted to occupy three positions, viz., with both conduits closed when in normal position,with one conduit open to the supply of fluid-pressure and the other open to exhaust when in' another position, and with the first conduit open to exhaust and the other conduit open to the supply of fluid-pressure when inits third position.

5'. The combination with the cylinder draincock of a locomotive, of-, a supplemental cylinder; a piston in said cylinder normally in a the valve of the drain-cock; a pair of normally closed cond nits for connecting said cylinder with a supply of fluid under pressure; and a valve normally occupying aclosed neutral position for alternately connecting one conduit with the supply of fluid. under pressure and the other with an exhaust.

6. The combination with a cylinder draincock; of a supplemental cylinder; a wedgeshaped piston in the cylinder for operating the valve of the drain-cock; conduits for conducting fluid under pressure to thecylinder to actuate the wedge-shaped piston;'means for controlling the passage of fluid under pressure through said conduits, and ahandle fast to the wedge-shaped piston andextending through the cylinder to the exterior thereof. I

7. The combination with the cylinder draininderinto which the stem of the drain-cock inder directly engaging said stem, a pair of conduits connecting said cylinder with a sup- 8. The valve provided with a revoluble taper plug having two transverse ducts and two radial communicating ducts, the transverse ducts adapted to admit air or steam alterle nately to each end of the eylindeigvalve chambers, to reciprocate the cylinder-valve plugs to open "or close the cylinder-cocks; the said cylinder-valve chambers, the cylinder-valve plugs reciprocating therein, the cylinder- 15 cocks in conjunction therewith, and the radialducts adapted and arranged to receive air or steam fromflthe chamber of the cylinder-valve as and for the purpose set forth.

9. In combination witiimvalve-plug provided with transverse and radial ducts adapted to simultaneously transmit air to one end of the cylinder-valve chamber and to receive .it from the other end, the valve-body B provided with spurs to limit the semirotation of the operating-lever E, means to temporarily secure said lever to acentral or normal posi-' tion, the cylinder-valvechambers the cylinder-valve plugs operating in said chambers, and the cylinder-cocks adapted when the said cylinder-valve plugs are actuated simultaneously to liberate the condensation in they steam-cylinders or to prevent the steam from escaping therefrom substantially as specified;

HENRY W. MCOQMBS.

Witnesses: I

JOSEPH T. BRENNAN, ARTHUR F. RANDALL.

Images