US1298298A - Marine-engine stop and control valve. - Google Patents

Description

n. COPELAND; MARINE ENGINE STOP AND CONTROL VALVE.

APPLICATION men SEPT-l6. 191a.

Patented Mar. 25, 1919.

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Ii-IDILEY COPELAND, OF WALLSEND, ENGLAND.

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To all whom it may concern:

Be it known that I, RIDLEY COPELAND, of Joan street, Wallsend-on-Tyne, in the county of Northumberland, England, subject of the King of Great Britain and Ireland, have invented certain new and useful Improvements in Or Relating to Marine-Engine Stop and Control Valves, of wihch the following is a specification.

This invention relates to marine engine stop and control valves. The object of this invention is to provide an improved stop and control valve.

A stop and control valve made in accordance with this invention comprises a casing, in which is formed a cylinder closed at one end and open to the casing at the other end, a piston adapted to work in said cylinder, the piston rod of said piston forming the stem of the main valve which is adapted to close the open end of the cylinder, a steam inlet to said casing, a steam outlet from the cylinder to the engine, means for admitting steam from the casing to the back of the piston, means for shutting off the steam to the back of the piston, means for moving the main valve to open and close the open end of the cylinder, and means for keeping the valve in its closed position. Means are provided for the steam to be admitted to the back of the piston by the lever or other means which operates the main valve, so that when said lever or other means is moved from its closed position to an intermediate position, steam is admitted to the back of the piston, whereby the main valve is converted from a loaded valve into an equilibrium valve whereupon the main valve can then be moved to any desired position with as much ease as an ordinary throttle valve and can be closed rapidly by moving the lever or other means back to the intermediate position. A further return movement of the lever or other means shuts oil the steam to the back of the piston, whereupon the valve becomes a loaded valve.

The drawing filed herewith is a diagram of one form of valve made in accordance with this invention.

a is a casing provided with a cylinder 1) having a steam inlet a and steam outlet cl. In the cylinder is a piston e. The piston rod 7 forms the stem of a valve 9 adapted to close the open end of the cylinder 6. On the end of the cylinder 2) is a guide h. In the casing a is a stufling box j through which I Specification of Letters Patent.

MARINE-ENGINE STOP AND CONTROL VALVE.

Patented Mar. 25, 1919.

Application filed September 16, 1918. Serial No. 254,199.

passes a spindle is loosely connected to the valve 9. The spindle 7c is adapted to be operated by a lever m through the link a and lever 0. In the casing a is a screwed rod p adapted to be operated by a handle 1" to bear on the spindle is to close the valve 9 on to the end of the cylinder b. Inthe side of the cylinder I) is a slide valve 3 adapted to be operated by the lever m through the link 26. From the casing a steam is admitted by a pipe '0 to the back of the slide valve 8. The handle m is shown in three positions marked 1, 2 and 3, notches 4: and 5 in the section 6 corresponding with the positions 1 and 2. The link 15 is shown in the three positions corresponding with the positions of the lever m by reference letters t, 2?, t the valve 8 being open in the positions 25 and F. The back of the piston e is adapted to be put into connection with the main condenser through the pipe to when the slide valve closes the port to admit steam.

In operation, assuming the parts to be in the closed position as shown in the drawing, the handle 1' is turned to draw the rod 1) away from the spindle 7a,- the lever m is moved from position 1 to the position 2, whereupon the valve 8 is opened and steam admitted to the back of the piston e. The valve 9 is then in equilibrium, whereupon it can be easily opened to any position between shut and. fully open by moving the handle m between the positions 2 and 3 and this opening can be regulated in the manner of a throttle valve to regulate the steam to the engine. The valve can be closed rapidly by moving the lever on from the positions 3 to 2 and on moving it back to 1 the steam to the back of the piston e is shut oii and the valve g be- (5011168 a loaded valve. The valve can be held in position and permanently shut by screwing the rod 1 to bear on the spindle It. By setting the position of the screwed rod 0" the limit to which the main valve can be opened can be predetermined.

What I claim as my invention, to secure by Letters Patent, is:

A stop and control valve comprising a casing, a cylinder in said casing, said cylinder being closed at one end and open to the said casing at the other end, a valve adapted to close the said open end of the cylinder, a piston adapted to work in said cylinder, the piston rod of said piston formin the stem of said valve, a steam inlet to said casing, a steam outlet from the cylinder to the engine,

and desire means for admitting steam'from the casing the said slide valve can" be opened and closed to the back of the piston, means for shutby the initial movement of said operating ting off the steam. tottheiback 'ofathei piston, lever the said valve being regulated by the means for moving the said valve means fer secendai y mgvem ent Qf the said operating '15 5 keeping the valve in itclSe'd pesiticim sa'id lever Withoflhmdving-said slide valve.

means for moving the said valve comprising" In Witness whereof, I V have hereunte an .eperatingrlevei' and 'aii'link connection, signed my. name. and said means for admitting steamvtonthe .n v, v R I-DLEY COPELAND. back of the piston comprising a slide valve "Witnesses: 7

l0 and a links conneetio nawith the said perat-H H. NIXON,

ing lever, the. arrangement being-such that I .i ,EBNEST H. YATES.

Cofiies lofthis patent niay be ebtained for five eeiits each;by addressixigflihe flo niziissiener;offi etents Washi ;1D-6 w

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