US283226A

US283226A - Bdwaed j

Info

Publication number: US283226A
Authority: US
Publication date: 1883-08-14
Anticipated expiration: 1900-08-14

Description

3 Sheets-Sheet 1.`

(No Model.) Y

\ Gr. E. ELLIOTT.

STBAMAGTUATED VALVE. A

f--No 283,226. "PatentedAug 14, 1883.

WITNESSES Y A l Harney/s N. ruins. mwumgmpm. www". At;

(No Model.) Y v y Sheets-Sheet 2. G. E. ELLIOTT.

\ STEAM A-GTUATBD VALVE. No. 283,226. Patented Aug. 14, 1 883.

WITNESSES (Na Model.) s sheets-sheet 8. G. E. ELLIOTT.

STEAM AGTUATED VALVE.

120,288,228. 8 Patented Aug. 14, 1888.

WITNESSES- l v Attarn y@ T ol/ZZ whom, L'' may concern:

UNITED .STATES PATENTYV OFFICE.

GEORGE E. ELLIOTT, OE oALAIs, MAINE, AssIGNOE or ONE-HALE T O EDWARD J. OEANGLE, OEsAME PLAGE.

STEAM-ACTUATED vALvEJ SPECIFICATIG forming part of Letters PatentNo. 283,926, dated August 14, 1889, Application mm1 Apin eo, icas. 'm0 amaai' Be it known that'I, GEORGE E. ELLIOTT, a citizen of the United States offAmerica, resid-` ing at Calais, inthe county ofVashington and State of Maine, have invented `certain new and useful Improvements in Steam-Actuated Valves for DirectActing 'Steam-Pumps and I do hereby declare the following to be a full, clear, and exact description of the invention,

such as'will enable others skilled inlthe art `to which it appertains togmake and use the same. n

This invention relates to that class of steampumps knownas direct-acting,"7 and it has for its main obj ects to arrange the main 1and auxiliary valves on the same plane, and to obviate certain difficulties pertaining` to thework- `struoted according to my invention.V

` the peculiar arrangement of the parts.

ing of steam-pumps of this class.

My improvement consists in the novel `construction, combination, and arrangement of parts, as will be hereinafter more fully set forth.

In the annexed drawings, Figure l is a per; spective view of the steam end oi the pump. Fig. 2 is a-view in longitudinal vertical section ofthe steaml end of a steam-pump con- Fig. 3 is a plan view of asteam-cylinder with the main and auxiliary valves in position. Fig. 4 is a plan view of a steam'cylinder embodying some of my improvements, the main and auxiliary valves being removed, so as to expose Figs. 5 and 6, are views of the auxiliary, valve. Figs. 7 and 8 are views ofthe main valve, and Fig. 9 is an interior view of the steam-chest head, showing the recess for the cushion valve.

In Fig. l ofthe drawings, the letter Arepresents the general form and arrangement of the pump, which may be of any suitable 4size and construction, equipped with my improvements. r l

The cylinder B is formed with a valve-seat, B, provided with a plurality of ports,arranged as follows: Situated at one side of the seat (see Figs. 3 and 4') is the steam-supply port G. Near the center are the usual inlet-ports,

D D", leading into the ends of the cylinder,

On the valveseat, adapted to travel over the ports D D E,

is the main or slide valve H, which is prei'- erably ofthe usual D-valVecIass, and alongside 0f this main valve, adapted to travel over the auxiliary ports b b andexhaust-port a, is n arranged the auxiliary valve I, as shown in 1 Fig. 3. This valve I on its under side is formed with alongitudinal cavity, d, and end cavities, e c, leading into each other, as shown in Fig. 6, and on its upper side with a trans verse groove, f, and a slot, @leading into the same for the passage and reception of thel valve-stem fi and its head. This cylinder and thesteam-chest (see Figs. 2 and 4) are also constructed with auxiliary ports c c for leading live steam into and exhausting the dead steam from the chamber containing the auxiliary piston K. These auxiliary ports c c are provided with lateral branch ports d d, leading to vertical escape-passages c c2, the former being provided with eushion-valvesj" f, opening into the steam-pockets formed in the head of the auxiliary steam-chest. The Office of these branch passages d We" e2 with the valves f f is to admit the steam to the interior of the auxiliary-piston chamber after the auxiliary valve has closed the port, and to provide a steam-cushion at each end to lessen the force of the stroke against the head. The side bar, k, of the valve connects the open ends and affords a bearing for the valve.

More particularly describing the chest-piston or piston-valve K, which is located within shown in the position that they assume when the piston is at its extreme right-hand stroke, l in which position live steam is admitted through the right-hand port, D, to the cylinder to act upon the right face ofthe piston, and as it so acts and forces the piston to the other end of the cylinder, the dead steam on the left of the piston is discharged through the port D, under the D-shaped valve, and through the exhaust-port in the usual Inanner. The arm p of the main valve fits' into a slot formed in the centralportion of the auxiliary piston, and the valve is operated by the reciprocating movement ofthe auxiliary piston. The auxiliary piston is operated by the force of the steam let through the auxiliary ports c c, one being closed in the course ofthe auxiliary piston, and steam is admitted up` through the smaller branch ports leading therefrom up through the cuslIion-valve ports, thereby causing ,the auxiliary piston to move when the auxiliary valve I has moved to admit the steam in the auxiliary ports. Thestrokes of the auxiliary piston in either direction are checked by the action ofthe steam-cushion, which traps the exhaust-steam after the auxiliary piston has traversed by and closed the port, thereby Inaking asteam-cushion with force sufficient to prevent the auxiliary piston from striking the head with force. rlhe auxiliary valve is operated by the tappet-arm on the main pistonrod, .and in the drawings, Fig. 3, is shown in position to admit steam to the ri ght-hand port, and exhausting from the left-han d port th rough the exhaust-port proper.

I claim the right to vary the construction of parts vwithout departing from the spirit of the invention.

VVhatI claim as my invention, and desire Io secure by Letters Patent, is-

1. A steam-chest the heads whereof have steam-pockets formed in their under side opening into the interior of the auxiliary steamchest, and communicating with auxiliary ports through branch ports provided with valves opening into the steam-pockets, in combination with an actuated piston-valve, substantially as described.

2. In combination with a valve-seat carrying a main valve and an auxiliary valve Inovadapted to admit the movement of a vertical valve, substantially as and for the purpose set forth.

5. An auxiliary valve, I, for avalve-seat of 7 5 a steam-engine, formed on its under side with a longitudinal cavity, d, and end cavities, e e, leading into each other, substantially as shown and described.

In testimony whereof I n'lysignature in presence of two witnesses.

GEORG-n A EDMUND ELLIOTT.

\Vitnesses:

GEo. H. BOARDMAN, WILLIAM F. BOARDMAN.