US1361004A - Automatic cylinder-cogk - Google Patents

Description

M. B. BREWSTER.

AUTOMATIC CYLINDER COCK.

APPLICATION mp0 MAY 26. 1920.

1,361,004. Patented Dec. 920.

v I lift! 72055: M6

M. B. BREWSTER.

AUTOMATIC CYLINDER COCK.

APPLICATION FILED MAY 26, I920.

' Patented Dec. 7, 1920.

2 SHEETS-SHEET 2.

V M W MORRIS B. BREWSTER, OFCI-IICAGO, ILLINOIS.

AUTOMATIC CYLINDER-606K.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Applicationfiled May 26, 1920. Serial No. 384,493.

To all whom it may concern:

Be it known that I, MORRIS B. BREWSTER, a citizen of the United States, residing at Chicago, county of Cook, State of Illinois, have invented a certain new and useful Improvement in Automatic Cylinder-Cocks for Locomotives, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention has for its object to produce a simple and novel device which will automatically drain the water from locomotive cylinders without waste of steam, which will relieve against excessive pressure, and which may be controlled at will by the engineer.

Viewed in another of its aspects my invention may be said to have for its object to produce an automatic cylinder cock for locomotives which, while simple and. compact, will afiord a large discharge opening.

The various features of novelty whereby my invention is characterized will hereinafter be pointed out with particularity in the claims; but, for a full understanding of my invention and of its objects and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawings, wherein:

Figure 1 is a side elevation of afragment of an engine cylinder having my improved device attached thereto;

Fig. 2 is a top plan view of the device re moved from the cylinder;

Fig. 3 is a section taken approximately on line 33 of Fig. 2; and

Fig. 4 is asection taken approximately on line 4 -4 of Fig. 2 and illustrating a different position of the valve from that occupier by the corresponding valve in Fig. 3.

My'improved device may be made in individual units, one for each end of a cylinder or, since two such devices 'will' be required for each locomotive engine cylinder, each unit'may be made to contain two devices, thus simplifying the manufacture and the work of attaching and connecting up the devices; the drawings illustrating this latter form of my invention.

Referring to the drawings, 1 represents a suitable casing or housing having therein two cylindrical chambers, 2 and 3', arranged side by side with their axes vertical. In the bottom of the casing, below each ofthe cylindrical chambers is a large opening, 4,

cylindrical wall, 7, terminates at some dis tance above the bottom wall, 8, of the housing or casing and, furthermore, is spaced apart from the side and end walls, 9 and 10, so as to leave a space or passage, 11, between'the same. Each of the spaces, 11, is placed in communication with an end of a locomotive cylinder, such as indicated at 12, through a suitable pipe connection, 13, screwed into or otherwise connected to the corresponding end wall, 10, of the casing or housing. The pipes, 13, are made of large diameter so as to permit a free flow of water out of the engine cylinders, this water enteringthe spaces or chambers, 11, and, when free to do so, flowing quickly out through the discharge openings, 4:. c

In each of the cylindrical chambers is a hollow piston or short plunger, 14, whose length is preferably no greater than the height of the cylindrical walls, 7. Lying below each piston or plunger is a valve, 15, adapted to seat upwardly against the corresponding valve seat, 5. Each valve has a stem, 16, extending upwardly through the piston and having on its upper end a collar or flange, 17,'which rests upon a strong spring,.18, housed within the hollow cylinder. The stem of the valve, where it joins the valve proper,'i's gradually enlarged as indicated at 19 and cooperates witha correspondingly-shaped opening, 20, in the bottom of the piston to form a watertight and steam-tight joint when the valve is drawn upwardly by the spring 18 until the part 19 engages the seat 20.' The spring 18 is placed under initial tension somewhat greaterthan maximum boiler pressure.

Normally, when there is no pressure in the engine cylinder, both valves take the position occupied by the left hand valve in Fig. 3; eachpiston and its valve having descended as a unit, under the action of.

- Walls ,Of the casing, 1, from the upperends gravity, so as to open the corresponding discharge port. Any water in either end of -the engine cylinder may therefore flow freely out of the draining device. Assoon as steam is introduced into one end of the engine cylinder, for example the right'ha-nd end in Fig. 1, and flows through the corresponding pipe into the drainage device, it

exerts a downward pressure on the upper face of the corresponding valve and upwardly on the bottom faceof the corresponding piston, 14. The parts are so proporis similarl tioned that the effective piston area eX- posed to the action of the steam is greater than the effective area of the valve which exposed, and therefore the resulting di erential pressure raises the piston .andvalve bodily into the positionillustrated on the righthand' side in Fig. 3; closing the outlet port and preventing the escape of steam VV-hile the piston: in the enginec'ylinder moves ahead, the left hand drain valve remains open and it does .not' close until steam is admitted intothe left hand end of the engine cylinder; whereuponfit will be .closed by the. differential action of the steam as heretofore explained. Asfsoon as the right hand end of the engine cylinderis open to exhaust,.the right handdrain valve opens and permitswaterof condensation xescape.

If, for any reason, there should be. an abnormally high pressure in either end'of the engine cylinder such, for example, as might occurincase water were. trapped. in one end of the cylinder, this excess pressure,- acting downwardly on the exposed surface of the corresponding drain'valve, would overcome the tension of'the spring and force the valve down..as,indicate d in Fig. 4; thus. opening thedischarge port and relieving the pressurein the engine cylinder before injury can result therefrom. p i

In order to permit the engineerto open the-valves. of the draining device at will, I

have provided anair-pipeyQl, into which the engineer may cause a1r under pressure to be admitted, the pipe, .21, having branches, 22 and 23, connected to inlet ports, 2,41and'25, leading throughjone of the side of the cylindrical chambers 52 and 3 respectively. By this means air under-pressure may be introduced into the upper. end of each of the cylindrical chambers, causing the pistons therein, and their associated valves, to b'exforced downwardly.

I I claim r l 1; A housinghaving an outlet in the bottomthereof and aninlet', a downwardlyopening valve..for .said outlet, a piston mounted in'said housing and adapted to be moved upwardly by pressure in the latter,

and a ryieldaible connectionv between said valve and said piston constructed and arranged to permit them to move away from each other when forcesof predetermined strength are applied thereto. 7 V 2. 'A housing having an outlet in the bottom thereof and an inlet, said housing havtom chamber of larger cross sectional area 'ing'therein above said outlet an open-botthansaid outlet, a piston fitting slidably-in saidchamber, a downwardly-opening valve for said outlet, said valve having a surface exposed to pressure in the chamber of smaller area thanthe area of said piston. and a connection between said valve and said piston.

3. A housing having an inlet and an out-' let, there being in the housing a cylindrical chamber open onthe side toward said outlet and of, larger cross sectional area than the outlet, a piston slidably mounted in said chamber, an outwardly-opening valve for said outlet,;said valve having a surface exposed to pressure in the chamber of smaller area than the area of said 'piston and a connection between said valve and saidpiston.

4. A housinghaving an outlet in the bottom thereof and an inlet, said housing'having therein above theoutlet a cylindrical chamber open on theend toward said outlet andlarger inv diameterthan said outlet, a piston in said chamber, an outwardly opening valve for said outlet, said valve ,havingv a: surface exposed to pressure .in' the chamber of smaller area than the areaof saidjpiston and .a connection between said 7 piston and said valve including .a spring under an initial tension acting. in the,direc-- tion tending to preventthevalve and the piston from beingmoved away from each other. r

5. A housing having an inletand an outlet, therebeing in the housing a cylindrical chamber open on the sidetowardsaid outlet 7 and of larger cross sectional area than the outlet, a piston slidably mounted in said I chamber, an outwardly-opening valve for said outlet, sald valve 'havmga surfaceexposed to pressure 1n the chamber of'smaller area than the area of said pistonand a connection between saidvalve and saidpi'ston,

the parts being so, constructed and arranged that the valvev andpiston tend constantly to move in the direction to cause .saidoutletto I i be opened.

a spring under an initial tension forming part of said connection and tending constantly to hold said valve and said piston at the innermost limit of their relative movements.

7. A housing having an outlet in the bottom thereof and an inlet, said housing having therein above said outlet an open-bottom chamber of larger cross sectional area than said outlet, a piston fitting slidably in said chamber, a downwardly-opening valve for said outlet, said valve having a surface exposed to pressure in the chamber of smaller area than the area of said piston, said valve having a stem projecting upwardly through said piston, a shoulder on the upper end of said rod, and a spring under an initial tension arranged between said shoulder and the underlying portion of the piston.

8. A housing having an outlet in the bottom thereof and an inlet, a downwardlyopening valve for said outlet, a piston mounted in said housing and adapted to be moved upwardly by pressure in the latter, a yieldable connection between said valve and said piston constructed and arranged to permit them to move away from each other when forces of predetermined strength are applied thereto, and means for admitting fluid under pressure above said piston to cause it to travel down and open said valve.

In testimony whereof I sign this speci- MORRIS B. BREWSTER.

fication.

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