US252959A - Ford and thoknhill b - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

J. B. MOONEY.

CYLINDER DRAIN COOK.

No. 252,959. Patented Jan. 31,1882.

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(N0 Model.) 2 Sheets-Sheet 2.

J. B. MOONEY.

CYLINDER DRAIN 000K.

UNITED STATES PATENT OFFICE.

JOHN B. MOONEY, OF CINCINNATI, OHIO, ASSIGNOR TO EDVARI) F. BRAD- FORD AND THORNIIILL E. MOONEY, BOTH OF SAME PLACE.

CYLINDER DRAIN-COCK.

SPECIFICATION forming part of Letters Patent No. 252,959, dated January 31', 1882.

Application filed August 15, 1881.

To all whom it may concern.-

Be it known that I, JOHN B. MooNEY, of Uincinuati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Oylinder Drain-(Jocks, of which the following is a specification.

My invention relates to cooks for draining the water of condensation and primage from steam-engine cylinders during and for each exhaust stroke of the piston; and it consists in the operation of the drain valves or cocks by means of a positive connection with the valvestem, valve-lever, rocker-arm, cross-head, or some other suitable moving part of the en ine, whereby the drain-cock is opened and closed. simultaneously with the opening and closing movement of the exhaust-valve for each successive stroke of the piston.

Many devices have been proposed for the automatic removal ofthe water of condensation and primage from the cylinder of an engine, either regularly or as it may accumulate in sufficient quantity to require vent ing; but none of these are entirely free from objection, nor do they open and close with the certainty necessary to the successful operation of a device of this character. One style, in use to some extent on locomotives, is opened by means of an im-lined plane on a sliding bar, and closed by a spring or the pressure of steam; but springs are liable .to weaken under continuous strain and fail to properly close the cock, and those devices which are closed by steam-pressure are liable to leakage of live steam from the wear of valve and seat, due to the severe beating of the valve in closing. Theautomaticcylinder-cock, which is opened and closed by steam-pressure, is not only liable to rapidly wear the valve and seat, but is also liable to stick and remain open at times during the steam-stroke of the piston. The spring-cock, arranged to open whenever the accumulation of water in the cylinder fills (No model.)

Another contrivancc for effecting the dis- 5o charge of the water ot'condensation accumulating in the cylinder consists in a rod connected with a valve at each end of the cylinder and extending to the cab of the locomotive-engine, where said rod can be manipulated by the engineer to open and close said valves. Such contrivance is objectionable, because it requires the watchful care of an attendant, and therefore the opening and closing of the drain-cocks is not automatically eiiected in unison with the opening and closing of the exhaust of the en- 'gine.

In my positive-motion drain-cock, the construction and operation of which will be fully described hereinafter, the action of the cock or valve controlling the drain is coincident with the op'uiing and closing of the exhaust, it is opened and closed with the same rate of motion, and will wear as long as will the steam and exhaust valves of the engine. It is adapt- 7o able to all types of engine, and the motion to open and close the drains from the ends of the cylinder may be taken from the exhaust-lever on marine engines, from the valve-stem or rocker-arm on locomotive and slide-valve engincs, or it may in all cases of attachment to slide-valve engines be worked from the valvestem, the essential requisite being that the cock or valve controlling the drains shall open when the exhaust opens and close when the exhaust closes by a positive connection with the actuating valve -lever, valve stem, or roeker-arm ot' the engine.

In the accompanying drawings, Figure l is an elevation from the exhaust side of the cylinder ot a leverengine. Fig. 2 is an elevation of a locomotivc-cylindcr, and Fig. 3 is a sectional elevation of a cylinder and steam-chest of an ordinary slide-valve engine, all showing my improved method of operating the cylinder drain-cocks.

Similar letters of reference indicate similar parts.

A is the cylinder ofa steam-engine, provided with the customary steam and exhaust p.1s- 5 sages, piston, and valve-gear.

I3 [5, Fig. l, are the exhaustlevers, operating corresponding valves, 1) I).

C G are the cylinder drain-cocks, connected with the levers B B by pendent rods 0 c. The cocks O O are simplytwo-seat or double-seat puppet-valves, connected to the levers 13 B at such a point as to produce the requisite lift of the valves 0 c to vent the drainage from the'cylinder. The pendent rods 0 c are preferably constructed with screwjoints to adjustthe valves 0 or c to their respective seats, in order that the exhaust-valve b or I) and valves 0 and 0 may open and close at precisely the same time.

The rising movement of the levers B B is effected by the customary cam or eccentric, cam-rod, rocker-shaft, and oscillatinglifters b and b while the falling movementof the levers is effected by gravity and the pressure of steam. It is obvious that directly either lever B or B is raised by its corresponding lifter to open the exhaust-valve I) or b the corresponding drain-cock G or G will be opened to vent the water of condensation and primage from the corresponding end of the cylinder A through the connecting drain-pipe c.

In Fig.2 the method is shown applied to the cylinder of a locomotiveengine, of which D is the valve-stem, provided with a collar and stud, d, which engages with a slotted lever, d, pivoted to a suitable standard, d secured to the lower guide-bar of the engine. At a point on the lever 67, where the motion thereof is sufficient to throw the balanced piston-valve E (shown in section in Fig. 3) to connect the drain-pipes c c alternately with the exit-pipe c, a connection is made with the valve-stem c, whence the motion of the valve E, and consequently the connection of the exhaust end of the cylinder A with the drainage-exit c, is made, as the slide-valve F, (shown in section in Fig. 3,) controlling the distribution of steam to the cylinder A, connects first one end and Y then the other with the exhaust-pipe G. (Shown ing action of the valve E is so proportioned in time and quantity as to open and close the drain pipes 0 and 0 simultaneously with the opening and closing of the exhaust for the respective ends of the cylinder.

The form of valve which I prefer for slidevalve and locomotive engines is shown in section, Fig. 3, and consists of a cylindrical shell, 0, having annular ports 0 c, with which the opposite ends of the cylinder are connected by drain-pipes c and 0 A piston, E, with a central annular recess, 0, is closely fitted to the cylinder 0, and so proportioned as to cover one or the other of the annular ports 0" c before the opposite of said ports is uncovered and connected with the drainageexit c.

In Fig. 1 I have shown in detail a form of puppet-valve such as I prefer to use with leverengines.

It is obvious that my method of operating cylinder drain-cocks can be successfully adapted to all types of engine, and that while the action of the valves or cocks is positive in both the'opening and closing movements, it is also of such a nature as to furnish a prompt and complete opening of the drain-pipes, and to seat the valves in such amanner as to insure the greatest possible durability of valve and seat.

Although the drawings show the forms of valves or cocks and methods of connection which I prefer, I do not wish to be limited to these precise forms of valves and connections, as certain situations and constructions of engines may require special forms of drain-valves and more complex arrangements of connecting-gear to eii'ect the drainage of cylinders by positive means.

I am aware that automatic cylinder-cocks which alternately open and close the drainpipes by direct steam-pressure and automatic cylinder cocks which are opened by suitable mechanism or by excessive pressure and closed by springs are not new, and these I do not claim.

\Vhat I claim is- The combination of the moving parts of the cylinder drain-cocks with a moving part of the engine, substantially as described, whereby the opening and closing movements of the said cocks are coincident with the opening and closing of the cxhaustofthe cngine,as set-forth.

In testimony whereof lliave signed my name to the foregoing specification in the presence of two subscribing witnesses.

JOHN B. MOONEY.

Witnesses:

EDGAR J, Guoss, GEO. N. SAMSON.

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