No. 825 924, I. N. MOORE, DUPLEX STEAM ENGINE, A PLICATION FILED APR, 7, 1904, PATENTED JULY 17, a 1906. 3 SHEETS-SHEET 1. 4 Witnesses: SY SY -? ZA
No. 825,924, PATENTED JULY 17, 1906.? I, N, MOORE, DUPLEX STEAM. ENGINE. APPLIO ATI0N FILE?D APR. 7, 1904, 3 SHEETs-sHEET 2.? % 2. 2 2 VN d N
No. 825,924, PATENTED JULY 17, 1906. II, N, M00RE, DUPLEX STEAM ENGINE, APPLICATION FILED APE, 7, 1904, 3 SHEETS-SHEET 3. WitnessGes: ID w genotor,
?? 2? 35 So UNITED STATES PATENT OFFICE. ILA N. MOORE, OF BATTLE CREEK, MICHIGAN, ASSIGNOR TO THE ADVANCE PUMP & COMPRESSOR COMPANY, OF BATTLE CREEK, MICHIGAN. DUPLEX STEAM-ENGINE. No. 825,924. Specification of Letters Patent. Annlication filed April 7, 1904, Serial No. 202,124. Patented July 17, 1906. To (tzz tuyhorpa, it;??? C07?,Cò7 }?y : which open into the cylinders a short dis Be it known that I, LA. N. MooRE, a citi 55 zen of the United States, residing at the city tance from their ends, and auxiliary or pread mission ports or passages i, which open into of Battle Creek, county of Calhoun, and State the cylinders at their ends beyond the pas of Michigan, have invented certain new and ; sages r. These passages i and r connect the useful Improvements in Duplex Steam-En gines, of which the following is a specification. cylinder with the steam-chamber C, which is preferably common to both of the cylinders. This invention relates to improvements in - duplex steam-engines. Valves c and care provided. These valves are provided with ports in at each end, pref The objects of this invention are, first, to provide an ni improved duplex steam-engine erably several in number, as appears in Fig. which is adapted to maintain a compara 4. The combined areas, however, of the 65 ports in at one end of the valve are less than tively even speed under varying conditions that of one of the passages r. These valves of load or work; second to provide an im proved duplex steam-engine having an even are adapted to alternately connect the pass. sages to the exhaust. The steam-chamber stroke or movement; third, to provide an im proved duplex steam-engine which is not sub C is connected to a suitable source of steam- 7o supply by a pipe C. The valves c and c' are ject to racing and one which at the same time exhausts freely, thereby avoiding back pres provided with suitable stems D. The stems SUlre. Dare secured by links D' to the arms F and Further objects and objects relating to G'. These arms F and G' are mounted on structural details will definitely appear from rock-shafts ele', respectively. (See Fig. 2.) 75 the detailed description to follow. The rock-shafts ee' are supported on a bracket I accomplish the objects of my invention or frame E, which is arranged on the top rail B of the engine-frame. These rock-shafts following by the devices specification. and means described in the e e' age connected by arms F and G to the pis The invention is clearly defined, and point ed out in the claims. A structure embodying the features of my invention is fully illustrated in the accompa nying drawings, forming a part of this speci fication, in which- A. Figure 1 is a detail longitudinal sectional view taken on a line corresponding to the broken line I 1 of Fig. 2, portions being shown in full lines. Fig. 2 is a detail transverse sec tional view taken on a line corresponding to line 22 of Fig. 1. Fig. 3 is detail longitudi nal sectional view taken on a line correspond ing to the broken line 33 of Fig. 2. Fig. 4 is a detailhorizontal sectional view through the steam-chamber C, showing the arrangement and structure of the valve. In the drawings the sectional views are taken looking in the direction of the little ar rows at the ends of the section-lines, and simi lar letters of reference refer to similar parts throughout the several views. Referring to the drawings, I provide a pair of steam-cylinders A, which are arranged side by side. Suitable pistons A' A' are provided, and these are provided with suitable piston rods a. The cylinders A are each provided with main admission ports or passages r, ton-fods a, so that the rock-shafts are actu ated by the piston-rods. The arms F and G are pivotally secured to blocks a?, carried by the piston-rods. W The arms F and F are arranged on the rock-shaft e in the same relation thereto that is, they project in the same general direc tion so that the valve c (which is connected to the arm F) is moved with or in the same direction as its controlling-piston A' to the piston-rod to which the arm F is connected. The arms G and G' are arranged on the rock shaft e in the opposite directions in relation thereto that is, they project in opposite di rections-so that the movement of the valve c, which is connected to the arm G' is oppo site to that of its controlling-piston A', to the piston-rod of which the arm G is connected. Thus connected, the valves are actuated in succession-that is, they have a chasing or following movement in relation to each other, which of course occasions the same movement of the pistons. I provide the inner ends of the valve stems with bearing-sleeves d, which are ar ranged in the bearings c' of the valves. The inner ends of the valve-stems are threaded, and the bearing-sleeves d are retained in po sition thereon by the nuts d". (See Figs. 2, 85 95
825, 924 3, and 4.) These nuts d' serve as tappets cushioned so that their movement is even, for the valves. Thus connected, the valves and the liability of racing or pounding and are not actuated until their controlling-pis injury to the engine by the change in the load tons have partially completed their strokes, or work is overcome... preferably about three-fourths thereof. This I have illustrated and described my im connection of the valves to the stems is very : proved engine in the form preferred by me on simple and yet very desirable, as it enables account of its simplicity and economy in use. the perfect adjustment thereof. - I am aware, however, that it is capable of In the drawings the piston A' is shown considerable variation in structural details.?? about the center of its instroke and the pis without departing from my invention. 75 ton A' at the end of its outstroke. (See Having thus described my invention, what Figs. 1 and 3.) When the piston A' is in I claim as new, and desire to secure by Let this position, the slack in the valve-stem of ters Patent, is-?????? the valve c' is, practically taken up, and as 1. The combination of a pair of cylinders; the piston moves forward the valve c' is actu istons therefor; piston-rods; a steam-cham ated and steam is admitted to the outer end.? common to both of said cylinders; main of the cylinder of the piston A', and its inner inlet-passages opening into said cylinders to end is connected to the exhaust H. As the ward the ends thereof; auxiliary or pread auxiliary or preadmission ports. are closed mission passages opening into said cylinders 20 or sealed by the valve c, a cushion for the pis at the ends thereof, beyond said main pas ton is provided. The auxiliary or pread sages; valves having a plurality of ports or mission ports i are first opened and serve to openings therein adapted to be brought into start the piston, giving them an easy start. register with said hain inlet-passages, the As the ports in of the valves are of lesser area, combined area of said openings being less 25 than the passages they form, in connection than that of said main passages, said valves therewith, a restrieted admission-portage for being adapted to alternately connect said the cylinders, so that this easy movement of inlet-passages with the exhaust; valve the piston is continued throughout. The stems screw-threaded on their inner ends; opening-ports in of the valve are, as above bearing-sleeves on said stems; nuts on said mentioned, so arranged that the auxiliary or stems for adjustably securing said bearing 95 : preadmission, ports or passages i are sealed sleeves in position and to serve as tappets; by the valve. The capacity of the ports in is bearings on said valves adapted to receive so gaged that the right quantity of steam is said bearing-sleeves; rock-shafts e and e'; admitted to the cylinder within the time in arms F. G on said rock-shafts connected to 35 which itis-practical and desirable that the said valve-stems; and arms F and G secured??? engine should be run.... - to said rock-shafts e and e' respectively, and fhave illustrated my invention in connec-p ivotally secured to said piston-rods, all co tion with a pump, a portion only of the pump acting for the purpose specified. cylinders W being shown. The piston-roids E 2. The combination of a pair of cylinders; a, are connected to any suitable pump-plun pistons therefor; piston-rods; a steam ger, the same not being here illustrated. With chamber common to both of said cylinders;. the valves and gear thus arranged, should the main inlet-passages opening into said cylin suction become broken or the labor be taken ders toward the end thereof; auxiliary or off the water end of the pump, the engine will preadmission? opening into said cyl- 45 not pound, as the speed of the piston is limit inders at the ends thereof, beyond said main ed by the time required for the steam to pass passages; valves having a plurality of ports 1?? through the ports in of the valves. With this or openings therein adapted to be brought restricted admission-portage, the ports or pas into register with said main inlet-passages, 'sages r may be of comparatively large size, so the combined area of said openings being less 55 that the cylinder is readily exhausted, thus than that of said main passages, said valves I5 - - - -avoiding back pressure in operation. An being adapted to alternately connect said in other advantage of this arrangement of ports let-passages with the exhaust; valve-stems - is that it is possible to carry a higher pressure screw-threaded on their inner ends; bearing of steam in the steam-chest than in the cylin 55 der, thus insuring a prompt action of the pis adjustably sleeves on said securing stems; said nuts bearing-sleeves on said stems for in. I 2? tons, for as soon as the second valve. opers, position and to serve as tappets; earings on the steam-pressure in the steam-chest being said valves, adapted to receive said bearing-. higher than that in the cylinder, the second sleeves; a pair of rock-shafts, one having a piston is at once started, this occuring in ac pair of correspondingly-projecting arms and 6o tual operation before the first piston comes the other having a pair of oppositely-project to restorreaches the limit of its stroke. This ing arms; and Suitable connections for Said I 25 insures an even and steady stroke of both arms to said piston rods and valves, all coact- - pistons. - ing for the purpose, specified. As before?xplained, in the arrangement of 3. The combination of a pair of cylinders ; 65 ports and passages described, the pistons are pistons therefor; piston-rods; a steam I3) i
chamber common to both of said cylinders; 825,924 rods and valve-stems, for the purpose speci main inlet-passages opening into said cylin fied. ders toward the ends thereof; auxiliary or 6. The combination of a pasir of cylinders; preadmission passages opening into said cyl pistons therefor; piston-rods; main inlet inders at the ends??ofe?f; beyond said main passages opening into said cylinders toward passages, said auxiliary passages being con the ends thereof; auxiliary or preadmission : trolled by a projecting part of the main valve passages opening into said cylinders at the - when the valve approaches the end of its ends thereof beyond said main passages, said stroke; valves having a PN of ports or auxiliary passages being controlled by a pro?? openings therein adapted to be brought into jecting part of the main valve wien the valve register with said main inlet-passages, the approaches the end of its stroke; valves hav combined area of said openings being less ing ports or openings therein adapted to be than that of said main passages, said valves brought into register with said main inlet -being adapted to alternatel connect said inlet passages with said exhaust; suitable? eing less the than combined that of area said of main said passages; openings valve stems; rock-shafts e and e, arms valve-stems; suitable tappets therefor; a F. G. on said rock-shafts connected to said pair of rock-shafts, one having a pair of cor valve-stems; and arms F and G secured to respondingly-projecting g arms and the other said rock-shaftse and e' respectively, and having a pair of oppositely-projecting arms; 20 pivotally secured to said piston-rods, all co and suitable connections for said arms to acting for the purpose specified. 4. The combination of a pair of parallel pose said pistonrods specified. and valve-stems, for the pur arranged cylinders; pistons therefor; pis 7. The combination of à pair of cylinders; ton-rods for said pistons; a steam-chamber pistons therefor; piston-rods; main inlet 25 common to both of said cylinders; main in passages opening into said cylinders toward. let passages opening into said cylinders to the ends thereof; auxiliary or preadmission ward the ends thereof; auxiliary or pread mission passages opening into said cylinders passages opening into said cylinders at the ends theredfbeyond said main passages, said at thé ends thereof, beyond Said main pas auxiliary passages being controlled by a pro sages, said auxiliary passages being con trolled by a projecting part of the main valve jecting part of the main valve when the valve approaches the end of its stroke; valves hay when the valve approaches the end of its ing ports or openings therein adapted to be stroke; valves having ports or openings brought into register with said main inlet therein adapted to be brought into register assages, the combined area of said openings 35 with said main inlet-passages, the combined being less than that of said main passages, area of said openings being less than that of said valves being adapted to alternately con said main passages, said valves being adapt nect said passages to the exhaust; valve ed to alteriately connect said inlet-passages with the exhaust; suitable valve-stems; a stems; a pair of rock-shafts, one having a pair of correspondingly projecting arms and pair of rock-shafts, one having a pair of cor the other i having a pair of oppositely pro respondingly-projecting arms and the other. a pair of oppositely-projecting arms; and jecting arms; and suitable connections for said arms to said piston-rods and valve-stems for suitable connections for said arms to said pis the purpose specified. toll-rods and valve-stems, all coacting for the 45 purpose specified. S. The combination of a pair of cylinders; pistons therefor; piston-rods; main inlet 5. The combination of a pair of cylinders; passages opening into said cylinders toward pistons therefor; piston-rods; main inlet the end thereof; auxiliary or preadmission passages opening into said cylinders toward passages opening into said cylinders at tire the ends thereof, auixiliary or preadmission ends thereof beyond said inlain passages, said 50 passages opening into said cylinders at the auxiliary passages being controlled by a pro ends, thereof beyond said main passages, said jecting part of the main valve when the valve auxiliary passages being controlled by a pro approaches the end of its stroke; valves hav jecting part of the main valve when the valve ing ports or openings therein adapted to be approaches the end of its stroke; valves hav brought into register with said main inlet 5 5 ing ports or openings therein adapted to be assages, the combined area of said openings brought?. into register with said main inlet eing less than that of said main passages; passages, the combined area of said openings valve-stens; a pair of rock-shafts, one hav being less than that of said main passages, ing a pair of correspondingly-projecting arms said valves being adapted to alternately con and the other having a pair of oppositely?? nect said passages to the exhaust; valve projecting arms; and suitable connections stems; suitable tappets therefor; a pair of for said arms to said piston-rods and valve rock-shafts, one having a pair of correspond stems, for the purpose specified. ingly-projecting arms and the other having a 9. The combination of a pair of cylinders; pair of oppositely projecting arms; and suit pistons therefor; piston-rods; main inlet 65 able connections for said arms to said piston passages opening into said cylinders toward 8) 7? 95 I C.? I i o 15 I 25
the ends thereof; auxiliary or preadmission thereofbeyond Said main passages, said aux passages opening into said cylinders at the iliary passages being controlled by a project ends thereof beyond said main passages, said ing part of the main valve when the valve auxiliary passages being conttolled by a pro approaches the end of its stroke; valves hav jecting part of the main valve when the valve ing ports or openings therein adapted to be?? approaches the end of its Stroke; valves hav brought into register with said main inlet ing ports or openings therein adapted to be passages, the combined area of said openings brought into register with said main inlet being less than that of said main passages; passages, the combined area of said openings valve-stems; and connections for said piston 1? being less than that of said main passages, rods and valve-stems, whereby One of said said valves being adapted to alternately con valves is given a movement to correspond nect said passages to the exhaust; Valve with that of its controlling-piston, and the stems; suitable tappets therefor; and con other is given a movement opposite to that nections for said piston-rods and valve-stems of its controlling - piston, for the purpose whereby one of said valves is given a move specified. ment to correspond to that of its controlling 13. The combination of a pair of cylinders; piston and the other is given a movement op pistons therefor; piston-rods; main inlet pas posite to that of its controlling-piston, for sages opening into said cylinders toward the the purpose specified. ends thereof; auxiliary or preadmission pas 2? 16. The combination of a pair of cylinders; sages opening into said cylinders at the ends pistons therefor; piston-rods; main inlet thereofbeyond said main passages, said aux passages opening into said cylinders toward iliary passages being controlled by a project the ends thereof; auxiliary or preadmission ing part of the main valve when the valve passages opening into said cylinders at the fißþf?aöhes the end of its stroke; valve 25 ends t??ere??f beyond said main passages, said stems; suitable tappets therefor, a pair of auxiliary passages being controlled by a pro rock-shafts one having a pair of correspond jecting part of the mainvalve when the vive ingly projecting arms, and the other havin approaches the end of its stroke; valves hav a pair of oppositely-projecting arms, and ing ports or openings therein adapted to be suitable connections for said arms to said pis brought into register with said main inlet ton-rods and valve-stems, for the purpose 95 assages, the combined area of said openings! specified. eing less than that of said Imain passages; 14. The combination of a pair of cylinders valve-stems; suitable tappets therefor; and pistons therefor; piston-rods; main inlet-pas connections for said piston-rods and valve sages opening into said cylinders toward the stems whereby one of said valves is given a - ends thereof; auxiliary or preadmission pas??? movement to correspond to that of its con sages opening into said cylinders at the ends trolling-piston, and the other is given a thereofbeyond Said main passages, Said aux trolling-piston, movement the for opposite the purpose of that specified. of its con Filiary passages being controlled by a project ing part of the main valve when the valve 40 11. The combination of a pair of cylinders; approaches the end of its stroke; valve pistons therefor; piston-rods; main indet-pas stems; a pair of rock-shafts, one having a sages opening into said cylinders toward the I pair of correspondingly-projecting arms and ends thereof; auxiliary or preadmission pas the other having a pair of oppositely-project sages opening into said cylinders at the ends ing arms; and suitable connections for said, 45. thereofbêyond said main passages, Said aux arms to said piston-rods and valve-stems, for??? iliary passages being controlled by a project the purpose specified. ing part of the main valve when the valve 15. The combination of a pair of cylinders; ing approaches ports or the openings end of therein its stroke; adapted valves to hav pistons therefor; piston-rods; main inlet-pas be sages opening into said cylinders toward the 5o brought into register with said main inlet ends thereof; auxiliary or preadmission pas? 15 passages, the combined area of said openings sages opening into said cylinders at the ends being less than that of said main passages, thereofbeyond said main passages, said aux said valves being adapted to alternately con iliary passages being controlled by a project nect said passages to the exhaust; valve ing part of the main valve when the valve 55 stems; and connections for said piston-rods approaches the end of its stroke; valve... and valve-stems whereby one of said valves stems; suitable tappets therefor; and con is given a movement to correspond to that of nections for said piston-rods and valve-stems its controlling-piston and the other is given a whereby one of said valves is given a move movement, the opposite of that of its control I ment to correspond to that of its controlling?? ling-piston, for the purpose specified. piston, and the other is given a movement I 25 i2. The combination of a pair of cylinders; opposite to that of its controlling-piston, for pistons therefor; pistora-rods; main italet-pas the purpose specified. sages opening into said cylinders toward the 16. The combination of a pair of cylinders; ends thereof; auxiliary or preadmission pas pistons therefor; piston-rods; main inlet-pas! sages opening into said cylinders toward the 65 'sages opening into said cylinders at the ends 825,924
5 O 825,924 ends thereof; auxiliary or preadmission pas- iliary passages being controlled by a project sages opening into said cylinders at the ends ing part of the main valve when the valve thereofbeyond said main passages, said aux approaches the end of its stroke; valves hav iliary passages being controlled by a project ing ports or openings therein adapted to be ing part of the main valve when the valve brought into register with said main inlet approaches the end of its stroke; valve passages, the combined area of said openings stems; and connections for said piston-rods being less than that of said main passages, and valve-stems whereby one of said valves said valves being adapted to alternately con is given a movement to correspond to that of nect said passages to the exhaust; valve its controlling-piston and the other is given a stems; and suitable connections for said pis movement opposite to that of its controlling ton-rods and valve-stems, for the purpose piston, for the purpose specified. w specified. 17. The combination of a pair of cylinders; In witness whereof I have hereunto set my pistol is therefor; piston-rods; main inlet-pas hand in the presence of two witnesses. sages opening into said cylinders toward the. IILA N. MOORE. ends thereof; auxiliary or preadmission pas Witnesses: sages opening into said cylinders at the ends EDWARD REEVEs, - thereofbeyond said main passages, Said aux CLAUDE A FINN. 25