US664114A - Valve for pumping-engines. - Google Patents

Description

No. 664,||4. Patented Deb; la, mom

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VALVE FRv PUMPING ENGINES.

' (Application led May 26, 1900.)

2 Shams-Sheet |l (No Model.)

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A TTORNEYS No. 664,||4. Patented bec. la, |900.

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Y VALVE FOR PUMPING ENGINES;

.(Applictionled May 26, 1900.)

2 Sheets-Sheet 2.

(No Model.)

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ATTORNEYS x vins ce, moraumo.. WASHINGTON. u. c.

1 "UNI'ijgED y STATES' PATENT FEICE.

JAMES SEBBOEN ATKINSON, OE LOUISVILLE, KENTUOKY, ASSIGNOE OE ONE- FOURTH TO WILLIAM O. ATKINSON,- OE NASHVILLE, TENNESSEE.

vLvE FOR PuMPINe-ENGINES.

SPECIFIGATIGN forming` part of Letters Patent No. 664,114, dated December 18, 1900.

Applicatidn I'iled May 26, 1900. Serial No. 18,075. (No model.)

To all whom it may concern: a, respectively, and the main exhaust cavi- Be it known that I, JAMES SEBBORN ATKIN- ties or grooves 9, (see Figs. 2 and 4,) which SON, residing at Louisville, in the county of are formed in the valve-seat andleadtotheexA Jefferson and State of Kentucky, have.inhaust-nozzle 7. Thus at each endwise move- 55 5 vented a new and useful Improvement in ment of the valve E one of the grooves or Valves for Pumping-Engines, of which the spaces 6 6a coincides with one of the main following is a specification. ports 5 5a, so that exhaust takes place from My invention is an vimprovement in autothe nozzle in the side of the steam-chest. matic valve attachments for pumping-en- Thesmall passages 8 S'f, which appear as 6o Io gines. mere grooves or depressions in the face of the The details of construction, arrangement, part G, conduct steam from the piston-cylincombination, and operation of parts are herede-r B to the ends of the steam-chest and coninafter described with reference to the acnect with the former at points which are a litcompanying drawings, in whichtle to one side of the center, as shown in Fig. l. 65

Figure lis a central longitudinal section of They are curved, (see Fig. 4,) so as to pass the steam or motor portion of my pump. Fig. around the combined inlet and exhaust pas- 2 is a vertical section of the Same on line 2 2, sages v5 5a. Fig. l. Fig. 3 is a perspective view of the AA semicircular groove 9 (see Fig. 3) is steam chest and its baseplate. Fig. 4 is a formed in the under side of the bed-plate F 7o zo perspective View of the piston-cylinder. Fig. of the steam-chest D, and this communicates 5 isaperspective View of the automatic valve. at its center with the port 9, (see Figs. 2 and The piston Aof the engine, which is adapt- 4,) that leads to exhaust-nozzle '7. The side ed to reciprocate in the cylinder B, is of the portions of groove9 communicate alternately trunk type and has a slightly-greater length with ports 5 5a to allow exhaust at one or the 75 than the stroke of the pump, with which itis other end of the cylinder B at each half-rein practice connected byr the rod C in the ciprocation ofthe piston A. usual way. The formation of the passages 8, 8a, and 9 The steam-chest D and its contained valve as grooves or depressions in the face G effects E are cylindrical in form, and the chest is ara considerable economy in the construction of 8o 3o ranged parallel with the side of the piston' the engine as compared' with cored castings, cylinder A, to which it is bolted. The valvewhich often prove defective and are therefore chest D has a dat bed or bed-plate F, (see worthless. Fig. 3,) which is adapted to t upon the flat. .From the foregoing description the operatop G of the piston-cylinder B; (See Figs. 2 tion of the valve E may now be understood. 85 and 4.) The valve E has a central chamber As shown in Fig. l, the piston A has coml, to which live steam has constant access pleted its movement to the right and the leftthrough a side and top port 2 and the coincihand end of the cylinder B has exhausted dent but narrower one 3 in the chest D. Said Athrough the communicating passage 5, while chamber has two ports 4 4iL on the under side, steam has also passed through the left-hand 9o 4o which as the valve E shifts alternately regispassage or port 8 and acted on the left-hand ter with the long and curved induction and end of the valve E, and thus shifted it also to exhaust ports 5 5a, leading in opposite directhe right, and live steam is being admitted to tions to the ends of piston-cylinder B. the right-hand end of cylinderBfrom the cen- The valve E is provided with circumferentral valve-chamber l through the right-hand 95 tial chambers or grooves 6 a between each passage 5, so that the next movement of the of its ends and the central chamber 1, such piston A will be from right to left, whereupon grooves forming steam spaces or passages the right-hand passage 8a to steam-chest D that serve alternately for exhaust-ports as will be uncoveredandsteam therebyadmitted the valve reciprocates. In other words, said to act on the nearest or right-hand end of the Ioo 5o grooves or passages 66 alternately establish valve E and shift it to the left. By this opcommunication between the passages 5 and eration the port 4 in valve E will no longer 'communicate with the right-hand passage 5, leading to the right-hand end of cylinder B, but communication will be established between said passage and the exhaust. Thus the piston-valve E acts automatically to allow alternate induction and exhaust of steam to and from the piston-cylinder through the same passages and is itself acted on by live steam, and thereby shifted at each half-reciprocation ofthe piston A, so as to cut 01T steam at the right moment.

The steam which acts on and actuates the valve A may be allowed to exhaust through the main passages 5 5, by which it entered the cylinder B; but to make sure provision for thorough exhaust ports 10, Figs. l and 2, are formed in the valve-seat, the same extending horizontally to connect with the main exhaust cavities or grooves 9. The said ports are located such distance from the ends ofthe valve-chamber that the valve E uncovers and opens them alternately as it reaches the limit of its stroke.

To prevent the valve E turning or rotating about its axis, I provide a rectilinear guide for the same by means of a screw l1, Fig. 2, which passes through the side of the steamchest D, its smooth or threadless end projecting into a longitudinal slot 12, Fig. l, in the side and central portion of the valve.

In case the engine is used vertically I provide means for counterbalancing the weight of the valve, so that it may not drop prematurely by gravity, and for this purpose the valve E may have a rod or small stem projectcd through the upper end of the steamchest and working in a stuing-box having the usual form of gland, by which friction on the said stem may be regulated as required to overcome the eect of gravity.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination with a cylinder-piston, and steam-chest and intermediate exhaustpassages ot` a valve adapted to reciprocate in the steam-chest, and having a central cham- (S-Lilli ber provided with an induction-port on one` side and two eduction-ports on the other, and also with grooves or exhaust-ports located laterally from said chamber, passages each com steam-chest and valve having a central portedcham ber and lateral exhaust-spaces, of combined induction and exhaust passages, exhaust-ports that communicate with the latter as the valve reciprocates, two small passages conducting livey steam to ends of steamchest, and supplemental exhaust-ports 10, which extend from the spaces formed alternately at ends of valve-chamber to the main exhaust-passages, as shown and described.

3. The valve and steam-chest having a flat base provided with central and end ports and a curved exhaustpassage 9, formed as a groove or depression in said base, and the piston and cylinder having a flat top provided with the steam-passages 5, 5a, 9, and 8, 8*, a portion of the latter being formed as grooves extended in the flat top, the said passages bcing arranged to coincide and communicate with those of the steam-chest base, substantially as shown and described.

4. The combination, with the steam-chest having a cylindrical chamber,of a cylindrical valve, and a lateral guide fixed on the steamchest the same working in a guide-cavity in the valve to prevent rotation, substantially as shown and described.

JAMES SEBBORN ATKINSON.

Witnesses DANIEL WEBER, PETER NEWFIELD.

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