US878686A - Cylinder-cock. - Google Patents

Description

I No. 878,686.

PATENTED FEB. 11, 1908.

'A.SUNDBO'RG.

, GYLINDBR COCK. LPPLI CATION FILED APR. 17, 1907.

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' 7 e1 (Sun/3607:

' JZZOIVZ AXEL SUNDBORG, OF ST. PAUL, MINNESOTA.

- CYLINDER-COCK.

Specification of Letters Patent.

Patented Feb. 1 1, 1908.

Application filed April 17, 1907- Serial No. 368.782-

To all whom it may concern:

Be it known that I, AXEL SUNDBonG, a sub ect of the Kingdom of Sweden, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Improvement in- Cylinder-Cocks, of which the following is a specification.

My invention relates to improvements in cylinder cocks and more particularly is adapted foruse on locomotives for draining the cylinders thereof from the cab.

Heretofore mechanism for accomplishing these results has been complicated and the parts liable to disorder. By the use of my improved mechanism these objections are overcome and the construction is simplified and the parts .are made effective and more positive in action.

, In the accompanying drawings, forming part of this specification, Figure l. is a side view of a portion of a locomotive showing my invention applied thereto; Fig. 2 is an end view of Fig. 1; Fig. 3 is a detail plan view of the front portion of the locomotive; Fig. 4

is a side view of one of the cylinder cocks; Fig. -5 1s a plan view of Fig. 4 Flg. 6 1s a central longitudinal section of Fig. 41- Fig. 7 is a side view of the piston in the cylinder cock; Fig. 8 is a plan view of Fig. 7 Fig. 9 is a detail view of the upper portion of the valve in the cylinder cock; Fig. 10 is a view of the upper end of the valve shown in Fig. 9; Fig. 11 is a view looking up upon the lower end of the portion of the valve shown in Fig. 9 Fig. 12

.is a side view of the lower portion of the stem of the valve shown in Fig. 9, and Fig. 13 is a I view looking up at the lower end of the stem.

In the accompanying drawings A represents an ordinary locomotive, B its cab and CC the cylinders. Each cylinder is provided with a pair of cylinder cocks D which are all of similar construction, one being connected with each end at the lower portion thereof for the purpose of draining condensation from each side of the piston in the cylinder.

The cylinder cock used in my invention includes a suitable casing 2 which is formed with a longitudinal drain port passageway 3 passing therethrough and a tapering narrow end 4 which is threaded into the cylinder wall. The threaded end of the casing is formed with a seat 5 for a drain valve 6 which is normally opened by means of an expansion helical spring 7. This valve is provided with a stem 8, the sides of which shape and construction permits steam to passfreely through said passageway. The edges of the end of the stem adjoining the valve are grooved at 11 so as to hold one 'end'of the helical spring,the other end of said spring impinging against the circular shoulder 12 in the casing.

The drain valve 6 is closed upon its seat by the force of steam in the cylinder and is opened when desired by means of an air operated. piston 13 which has a large working area as compared with the valve and works vertically in an air cylinder 14 on the enlarged end 15 of the casing 2. The air cylinder below the piston 13 is closed'by a threaded. plug 16 which limits the downward movementof said piston. Thepiston 13 is provided on its back with atube 17 playing freely through the plug 16 and the port formed by the passageway 3 and the tube 17 forms an outlet from the drain valve for condensation in the end of the cylinder'with which the drain cock is connected. The upper side of the piston 13 has a hollow. cylindrical extension 18 which plays in a cylindrical seat 19 for the-purpose of forming a water-tight lapjoint between the drain valve and air cylinder. Any water or steam leaking from the valve 6 into the air cylinder 14 has egress from the casing 2 through the vent openings 20. The end of the air cylinder back of the piston has an air supply passageway 21 leading through the plug by which air under" pressure is admitted for depressing the piston and opening the valve 6, it being understood that the free end of the stem 8 impinges against the front of said piston when said valve is closed.

' The. back of the piston is dished at 24 so that air entering the air cylinder impinges against the entire piston when down. An opening 22 entering the cylinder through the plug 16 drains any water from the back of the piston, its passageway being normally closed by a thumb screw 23 when the cylinder cock is in use. This construction of two part drain valve and air piston permits the drain valve to act independently of the air piston and provides means which is operated by air pressure from the cab for positively opening and holding open the drain valve.

In use, a cylinder cock is connected in the wall at or near each end of the lower portion of each cylinder by the threaded end 4. To open the drain valve 6 all of the cylinder cocks are connected by means of the piping with a three-way valve 26 in the cab B. This automatic valve is connected with the master or engineers valve 28 and by the train piping 27 with the air supply tank 29. A drain pipe 30 is also connected with the three -way valve which relieves pressure from the cylinder cocks when the master valve is closed. By opening the master valve air is admitted under pressure to the cylinder cocks against the backs of the air pistons therein which open and hold open the drain valves against pressure that may be in the cylinders. Any condensation in the cylinders is then free to egress through the cylinder cocks. This mechanism provides an efficient and effective means for draining the cylinders when the locomotive is at rest or in motion and the cooks are simple and unlikely to get out of order by water freezing in their ports.

In accordance with the patent statutes, I have described the principle of operation of my invention, together with the apparatus whichI now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus shown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims.

Having described my invention, what I claim as new and desire to protect by Letters Patent, is

1. In combination witha locomotive having cylinders and a cab, a drain cock in the lower portion of each end of each cylinder, a source of air pressure, a system of piping leading from said source of air pressure and through said cab and a master valve conemcee tained in said pi ing and located near said cab; each of sai draln cocks comprising a suitable casing, a drain valve seated in sa1d casing, an air cylinder below said drain valve, an air piston freely 'dis osed in said cylinder and adjacent to the ower end of said stem and adapted when in superior position to hold said drain valve open, a lap joint between said drain valve and air cylinder, and a drain port passageway passing through said casing and piston,

2. In combination with a locomotive and its cylinder, a drain cock in the lower portion of each end of said cylinder, a source of air pressure, a system of piping connected with said source of air pressure, and a master valve contained in said piping, said drain cock comprising a suitable casing, a drain valve seated in said casing, an air cylinder below said drain valve, an air piston in said cylinder and adjacent to the lower end of said stem and adapted when in superior position to hold said drain valve open, a lap joint between said drain valve and air cylinder, and a drain port passageway passing through said casing and piston.

3. A drain cock comprising a suitable casing, a drain valve seated in said casing, an air cylinder below said drain valve, an air piston freely disposed in said cylinder and adjacent to the lower end of said stem, a lap jointbetween said drain valve and air cylinder, and a drain port passageway passing through said casing and piston.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

AXEL SUNDBORG.

Witnesses:

H. L. FISCHER, F. G. BRADBURY.

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