US359767A - Device for draining the cylinders of engines - Google Patents

Description

' (No Model) J. BRISCOE.

DEVICE FOR DRAINING THE GYLINDERSOF ENGINES.

No. 359,767. Patented Mar. 22, 1887 W'ZfiGGeSGS, I JZanfirzlscoe.

n PETERS. Mummy. Wahnwm n c NITED STATES PATENT @rrrcne JOHN BRISCOE, OF CUSTER CITY, PENNSYLVANIA.

DEVICE FOR DRAlNlNG THE CYLINDERS OF-ENGlNES.

SPECIFICATION forming part of Letters Patent No. 359,767, dated March 22, 1887.

Application filed August D, 1886. Serial X0. 210.457. (N0 model.)

To all 2071 0722, it may concern:

Be it known that l, J OHN BRISCOE, a citizen of the United States, residing at Custer City, in the county of McKean and State of .Pennsylvania, have invented new and useful In1- provenicnts in Devices for Draining the Cylinders of Engines, of which the following is a specification.

In order to drain the cylinders of engines by discharging the water of condensation from the exhausting end, and at the same time pre vent waste of steam at the receiving end, of the cylinder, various contrivances have been employed-such, for example, as a barrel or shell communicating wit-h both ends of the cylinder by pipes, and reciprocating rigidlyconnected valves housed in the shell and operatingautomatically, in order that the closure of one valve, consequent upon the pressure of steam against it, would open the other valve, and thereby drain the exhaust end of the cyl indcr. Other devices have been adoptersuch as loosely-coupled reciprocating valves in a shell or case having valve-seats and suit able means of discharge.

The connected valves have also been provided with a spring so arranged as to automatically rnovc both valves from their seats when the steam is cut off from the cylinder, thereby draining both ends of the cylinder while the engine is at rest.

The object of my invention is to provide an improved means of automatically opening the two valves when the engine stops; and it consists in the combination, with a shell or case having a suitable drainage-outlet and two valves seating against opposite ends or sides of the shell, of a spring engaged with the valvestcm between the valves and provided at its attaching end with a screw-plug, by which it is detachabl y secured to the shell, and whereby the two valves are automatically moved from their seats when steam is cut off from the cylinder of the engine, to permit both ends of the cylinder to drain while the engine is not in operation.

The invent-ion is illustrated in the accompanying drawings, in which- Figure 1 is a central sectional view of a check and relief valve embodying my invention; Fig. 2, a section of the valve stem taken on the line a: x of Fig. 1, and Fig. 3 a

detail view of the device for automatically opening the two valves when steam is cut off from the cylinder of the engine.

In order to enable those skilled in the art to make and use my invention, I will now describe the same in detail, referring to the drawings, where The numeral 1 indicates a shell or case having at each end a scrcwthrcad, 2, for connecting, bysuitable pipes, 3, with the'oppositc ends of the cylinder of an engine or pump. The shell in practice will be located cent-rally be tween the ends of the cylinder, although this is not deemed essential. The center of the shell is provided with a screw-neck, 4, for connecting with a pipe, 5, to constitute-a drainageoutlct, and each end of the shell is provided with a valve-seat, 6, on which alternately seat the valve-disks 7, which are connected by a stem, 8, passing centrally through the shell. One of these valves is preferably formed with or permanently secured to one end of the stem, while the other end of the latter is screwthreaded, as at 9, the valve at this end being secured by a shoulder, 10, and a screw-nut, 11. The valve-stem at or near the middle of its length is slotted, notched, or recessed, as at 12, and with the same loosely engages one end of a fiat or other shaped steel spring, 13,'which, as here shown, forms part of or is attached to a screw-plug, 14, vengaging a screw-socket, 15, in one side of the shell and looked in place by a screw-nut, 16. The valve-stem is winged adjacent to each end, as at 17, such wings guiding the stem in the shell and aifording passages for the entrance of drainage into the shell to the drainage-outlet.

In operation the valves travel in harmony with the piston of the cylinder, and when steam enters at one end of the latter the valve corresponding to that end will be seated, thus checking the escape of the live steam, and at the same time moving the opposite valve from its seat, and thus holding it until the piston makes its stroke, thereby relieving the exhaust end of the cylinder from condensed steam or water which passes through the opened valve to the drainage-outlet.

When the engine is in operation, one or the other of the valves is always seated, thereby placing the spring under tension, and consequently when steam is cut off from the cylinder and pressure on the closed valve relieved the spring assumes its straight position, Fig. 3, thereby moving the valve-stem just a sufficient distance to unseat both valves. In this position of the valves both ends of the cylinder are drained while the engine is not in operation, and this is accomplished automatically, so that the engineer is not under the necessity of operating the valves in starting or stopping the engine.

I am aware that a spring for automatically unseating the connected drainage-valves of an engine or pump cylinder when the engine or pump is at rest has hitherto been provided and arranged in several ways; but I am not aware that such spring has been provided with a screw-plug for detachable connection with an opening in the valve-ease, and whereby said spring can be adjusted from the outside of the Having thus described my invention, what In testimony whereof I aflix my signature in.

presence of two witnesses.

JOHN BRISOOE.

\Vitnesscs:

O. E. Jenn, JNo. B. CHAPMAN.

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