US962906A - Steam-pump. - Google Patents

Description

J. MARCH.

STEAM PUMP.

APYLIGATION FILED MAR.3, 1909.

Patented Jun@ 28, 1910.

.UNITED sTATEs "PATNT OFFICE.

JOHN' MARCH, OF DILLON, MUNTANA.

STEAM-PUMP.

To all it 'may concern:

.Be it known that I, JOHN MARCH, a citi zen of the United States, residing at Dil lon, inthe count-y of Beave'rhead and State of Montana, have invented certain new and useful Improvements in Steam-Pumps, of

`vvhic'h'the following isa specification.

My said invention consists in certain improvements 1n a compound steam pump', or air compressor, whereby a very efli'cient construction is secured and. one wherein economy of power and large capacity 1nI operu ation are combined, all as will be hereinafter inorefully described' and claimed.

rReferring to the accompanying .drawings which are made a part hereof, and on which similar reference characters indicate similar. parts, Figure l is a longitudinal horizontal Section through a'steani lpump 'of my im proved construction, Fig. 2 a longitudinal vertical action. on the dotted line 2 2 in Fig. l, and Fig.- 3 -a detail View on an en- 'larOed scale.

. 4 the ends of Whichiare mounted in slides or Ways formed inthe side pieces of the- 4traine' A. Slidhg head 2 is connected by connecting rods' With'a cross-head 'the ends of Whichare mounted to slide in vv ys in thel trarne A. Said cross-heads 4 an are..v rigidly connected together by connect-v i ng`1"odsl 7. Said sliding crosslheads .4 and 5 connected bythe rods thusconstittea 'sliding frame. s'aid cylinder B between said heads and has afpiston rod 9 extending from one side thereo lApiston 8 is mounted in 'out through the head l1 and is" provided Witha: cross-head 10 on its outer end. The sliding crossehegad 4. is connected by toggle links-11 and 12 WithV4 said crossehead 10 on the outer end" of. said piston rod. The centrai pivot-213 of toggle 1l extends into a slid! ing bloclr '14 mounted in la grooved Way 15 Specification of Letters Patent.

Application filed March 3, 1909. Serial No. 481,162.

extending across frame A. The central pivot 16 of toggle 12 extends into a similar block 17 mounted inl the same groove on the opposite side of said Way. A steam chest B is mounted on one side of the steam cyl linder B and a steam' chest B2 on its opposite side'.A `Steam chest B hasa steam inlet!l pipe b connected With one side thereof and a steam exhaust pipe b connected with its opposite side. Said steam vchest is dijij'ided into a steam inlet chamber and a steam exhaust chamber. A sliding valve 2O is mounted in a groove in said steam chest being formed .with ports 21 and 22 adapted to register with ports 23 and 2li leading into the engine cylinder. A similar, but spring supported sliding valve 25 ismounted in the steam chest B2 'ormed'withports 2,6 and 27 adapted to register With ports 28gand 29 in said cylinder. An operating rod 30 is. connected With sliding valve 2O and an operating rod 31 'with sliding 'valve 2 5. 'The 'outer ends of'said 'rods extend-through. opposite ends of across-bar 32' mounted on'isliding crossehead 4; and are provided with adjust-- able Astrikes 33.', 34C, 3-5 and mrespeetively with which said bar 32is adpid tocontact, as the sliding cross-head aproaches the limit ot' its/movement, to shi tl said .sliding valves 20 and 25 from the 'position showlr in Fig. 2 to the reverse position. f

' The cylinder C is of coinron'construc'tion Patented vJune 28, 1910.1

having inletports on one side 'at each end controlled' by valves LOand 41 and connected .by a branch 'pipe to va main inlet pipe c and' on the opposite side provided vWith exhaust ports controlled 'by valves 42m-1d 43 connected by a branch to a .main exhaust pipe o.

A piston 44 is mounted'in said'cyl'inder and connected by a piston rod 4 5 .with the cross- .head 10 on the 'end of the piston rod '9.

Cylinder' C is of a' similar construction hav-. i ing an inlet port on one side vcontrolled by valves 46 and 417 connected by branch 'pipes' toan inlet pipe c2 and with.exhaustports on the opposite side controlled byvalves 478 and 49 and connected by a branch to an eX- sai'd cylinder connected'by a piston rod 5l with the'sliding cross-,head 4 l The'inner end ofpistonrod 9 connected to the piston 8 4is formed enlarged or surrounded by a cylinder l of approximately one-half the diameter ofthe boreocylinder B, said portion A5'j being of alengthto ex,-

.haust pipe c3. A piston 5 0, is mounted. in

z tend through the head 1 and occupy `a siii- Vtween head 1 and cient portion of the area of the chamber'beiston 8 to divide the cylinder B into a igA pressure andA low pressure expansion chamber. l

In operation the parts bei-ng inthe positionshown in Fig. 2 and the steam coming from the steam in let pipe b through the steam chest B and the ports 21 in sliding valve and 25,.in cylinder B, comes into the space between head 1' and piston S and expanding drives'aid piston and head in opposite directions, the piston 8 operating througlitli'e piston rod 9'to drive piston i4 in cylinder C from the positionl shown in l Fig. l .toward the 4opposite end of said cylindenWhile-the movementof head 1 through l lsi-tioiishownin Fig. l toward the oppositeV endlo'i" its cylinder andv at Ythe same time tllihi-.oinection with cross-head 4,1'connect inglrods 7, dross-head 6, 'and piston rod 51 'rants 'isto1i50inc linder C fromvthe pov P y slides head 2 toward the approaching piston S'iintil lsaid head 2 and pistonlS occupy substantiallythe same position relative to each 4 othernastio head 1 and piston 8 as shown in Vao the drainings.' When this position is apreached. the `crossbar 32 comes in Contact.V 'with the strikesV 34 and'SG on the outer ends bfvalverdsfO and 31 and shifts the valves 'A 20 and Z55-to V'close ports 23 and 24 and open :the ports 28 and 29 through the steam `chest BiintOthechamber between the head 2 and piston .8. Said chamber beingof a larger area the steam from the phamber between piston 8 and head 1 4passesinto said chambei' and expands driving the parte in the op- 4posite direction, thus securing a double ex Y paiision of the steam. 1Wl'ien the head 1 and posite cylinder C is operating in a like. man-- pisti'in 8 again approach l each other the valves are afgain shifted and the live steam admitted into the -high pressure chamber4 as before when the first expansion takes place in the high` ressiire chamber and the spent steam is ex iaiisted from the low pressure chamber.; As vthe piston 44 is "driven in one direction it will suck in the air, or other Hind, through the inlet yvalve behind, in the directionv of its motion,` and drive ont under' 4pressure the Huid in- `front, in the direction o'its motion, while vthe piston 50 inthe opner but in a reverse direction. The pipes c and e are, `of course, -intended-to lead to a single high pressure pipe but mayl be sepi aratcly `connected if preferred; 1V,

`Bythis arrangement an engine and pump, or compressor, is'. provided wherein the cxpaiisirje force of the 'steam is used' in both directions and balances-the strain .and vibration while its entire force is directed upon i the Work and no part of it is spent against the stationary immovable parts.

Having thus fully described in said invention, what I claim as new, an desire to .secure by Letters Patent, is:

1. In a steampum he combination of a frame, a steam cyliiiA er, slid'l opposite `ends of said c lin er, a sliding frame to which said hea s are connected, a

piston between said sliding heads, pumpingcylinders adjacent `to eache'nd of said steamy cylinder containin pistons, the piston of "one being connecte lto the ypiston rod of the piston in the steam cylinder andthe piston of the other connected to the sliding frame with'which said sliding heads are connected, and the steam controlling mechanism, sub' stantially as set forth. y

2. In a. steam pump, thecombinationof a frame, a steam cylinder, sliding heads there heads yinthe I in, a slidingvfranie mounted in the 4marin ing frame connected to the'sliding heads onv the steam cylinder, andthe steam. controlling mechanism, 'substantially as set forth.

inders, the valves for .controlling the inlet 3. In a steam pump, the combination of -av frame, the steam cylinder, the pumping cyl-- 'andexhanst ports of'said pumping cylinders, `the sliding-.heads in said steam cyl inder connected to a sliding frame, said slid' ing frame, 'a piston between said sliding headspa connection between said iston and the piston of one pumping cylin er, a coniiection between the sliding frame andv the piston ofthe other pumping cylinder, steam `inlet and exhaust orts leading into-'the steam cylinder-on tie o posits sides ofthepiston, slidingvalvesI or controllingsaid' ports, anda connection between thesliding iin frame and said sliding valves for shifting their position, substantially as set forth.

-ln .witness whereof, I have V hereunto set my hand and seal yat WVashingt-on, '1). C;

nineteen this 26th day of February., A. D. hundred and nine.

JOHN M'acii. [as] iis

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