US754299A - Valve. - Google Patents

Description

. L. L. 'GRIFEITHS- VALVE. y APPLIOATION FILED AIB.. 1. 1903.

PATBNTBD'MAP.. s, 1904.

N0 MODEL. 5 SHEETS-SHEET 3. y

No. 754,299. PATBNTED MAR. 8, 19.04).

L. L. GRIPPITHS.

VALVE.

v.ILPPLIOATION FILED APB. 1. 190s.

N0 MDEL. 5 SHEETS-SHEET 4.

ATTOHNEY No. 754,299. PATENTED MAR. 8, 1904. v

L. L. GRIFFITHS.

VALVE APPLIouIoN FILED APB. 1. 1903.

5 SHEETS-SHEET 5.

. No MODEL.

l vW/.TN'SSE ya www# UNITED f ISTATES Patented March 8., 1904;.

l 'LEONARD L. GRIFFITHS, or NEW YORK, N. Y.

VALVE.

SPEcIrIc'ATION ferai-ing part of Letters P altent No. 754,299, dated March s, 1904. Application filed' April 1, 1903. serai No. 150,533. (No moan.)

,To all whom it mag/ concer'n.- v l Be itknowri that I, LEONARD L. GRIFFrrHs, a citizen ofthe United States, residing at the city of New York,borough of Brooklyn, Kings county, in the State of INew-York, have invented certain new and useful Improvements in Valves, of which the following is-a full, Y

clear, and. exact specification.-

My lnvention relatesto- 'animprovement 1n valves for steam-pumps;- and the same has for its objecty more particularly to provide a valve and mechanism for operating the same which may be applied to'si-ngle or compound pumps of either horizontal or vertical type. y

. Furthenthe invention has for its objects to provide avalve and operating mechanism consisting ofthe smallest number of parts possible, be moredurable and less liable to wear out or get out of order, and be more positive in its operation than` the ones in use at the present time on steam-pumps.

To -t'hese ends' my :invention consists of the novel details of construction and the combiL nation, connection, and arrangement of parts hereinafter more fully described and then pointed out in the claims.

In the accompanying. drawings; forming part of this specification, in which like'numerals of reference indicate like parts,.Fig ur e 1 is a central longitudinal sectional view of a cylinder steam-pump of usual construction provided with a valve and operating mechanism constructed according to' aud embodying my invention. Fig. 2 is 'an end view of the valvechest and valve mechanism removed from the pump. Fig. 3 is a central longitudinal section taken on' the line 3 3 of Fig.' 2 looking in "the directionjof the arrow-a and yillustrating the interior construction of' the valve. Fig. 41is asimilar viewy taken on the same liney 3 3 of Fig. 2 looking in the direction of thearrow b, and Fig. 5 is atransverse section taken on the line 4 4 of Fig. 3.

In said drawings, 10 denotes a singlecylinder pump 'of the usual general construction, comprising a steam-cylinder 11 and a watercylinder 12, rigidly connected together by an intermediate frame 13, having the slide. 14

therein, and 15 denotes a .piston-rod havingone end'extending `into the steam-.cylinder 11 and provided .with apistn 16 andI its/.other 4opposing ends of the' steam and water cylin-y ders through which the 4piston-rod 1 5 extends."

" The steam-cylinder 1 1 is providedat its rear end vwith a main forward steam-port 18 and i at itsforward end with a main backward steamport 19.

20 denotes a valveecasing which is arranged upon and at right angles tothe cylinder 11 and supported in position thereonfupon foot.- `pieces 20a 2O",- whicliare bolted to. said cylinder 1.1, and 2l denotes 'a projecting-sleeve or steadiinent having an enlarged end or head by means of which the same is. bolted to 'the forward end of said casing 20. I.Within 'said sleeve the outer end of whichl is fixed, by means of a spline 23, asegmental arm 24, having a slot 25 provided in its end, `and 26 denotes. an arm" vor steadiment y21A is arranged. a shaft 22,`near disposed upon the outer end of the shaft 22 f intermediate the outer surface ofthesegmental arm 24 and the washer 27 and securedupon the spindle end of-said shaft 22 by a lock-nut to the end of the shaft 22, but is held in operative connection ytherewith -by means of. the

stud 29,- secured to the arm 26 .by a nut 30iand. lprojecting from its rear. surface into Aand through the slot 25 'of said segmental arm24, and 31 denotes a link having one end pivotally -secured to the lower slotted end o'f vthe arm 26 andits other end similarly secured to the cross'- head 32, secured to the piston-rod 15, working upon'the slide 14, whereby when the pump is in operation the arm 26will be oscillated,

and in being sooscillated cause the shaft 22 tot be partially. rotated in either direction when l the stud29 ycontacts with the ends ofvthe slot lkeyed thereto `by splines 54, so as to turn with said shaft 22 when the saine is partially rotated by the arm 26.

3,4 and 35 denote, respectively, the'forward IOO 39, communicating with the atmosphere or a condenser.

In the foot-piece 2Ol of the casing 2O is a forward steam-portway 40, communicating with the forward steam-port 18 of the cylinderll, a backward steam-portway 41 in the foot-piece 20" communicating with the backi ward steam-port 19 of the cylinder 11, and 39a denotes an exhaust-port arranged in the bottom of the casing 2O intermediate the steamportways 40 and 41 and communicating with the: main 'exhaust 39.

At the `middle of the casing 20, in the lower right-hand portion thereof, intermediate the backward steam-portway 41 and the exhaustport 39', is an auxiliar)T steam-port 42, from` which extends `forwardly a bore 43, communicating with the outlet 44 at the forward or right-hand endof the casing 20, and above saidl auxiliary steam-port 42, in the upper righthand portion of the casing, intermediate the `mainsteam-inlet 38tand the backward steamportway '41, is an exhaust-port 45, having a bore 46 extending forward therefrom, terminating in an inlet 47 at the forward or right-- hand end of the casing 20, and at the lower left-hand side of the casing 20, near its middle, intermediate the exhaust-port 39a and the forward steam-portway 40, is an auxiliary steamport 48, having a bore 49 leading therefrom to the lower rear or left-handl end of the casing 20 and 'terminating in an outlet50, and in the upper left-hand portion of the casing 20, intermediate the main steam-inlet 38 and the forward steam-portway 40, is an auxiliary exhaust-port 51, having a bore 52 leading therefrom to the rear or left-hand end of the casing 20 and terminating in an inlet 53.'

The operation of the apparatus is as follows, if we assume the valve to be in the position shown at Figs.` 1 and 3 and steam entering at 38 and passing through the passage 34 in the valve 3" and through the main forward steamportway 4l) and port 1810 the rear end of the steam-cylinder ll 'ahd raming the piston 16 r therein to move lorujard or toward the right- 5 hand end ,of said 1eamr-,vlinder 11 and the exhaust-.steam heilig permitted at the same time lo pass from he forward end of said s!eam--evliuder ll through the main forward exhaust-poriway "lil :md port 41 through the passage 35 in the valv(` 33. exhaust-port 39",

and into the main exhaust 39. As the piston i 16 and rod l5 continue to move forward toward the water-cylinder 12 they carry therewith the lower end of the arm 26 hy means of the link 31, attached to the cross-head 32, and as said arm 26 moves forward the stud 29 thereon is caused to contact with the righthand end of the slot in the free end of the segmental arm 24, splined to the shaft 22, and partially rotate (about forty-live degrees) said shaft 22 and valve 33 upon the rear end thereof, and as soon as the lower end of the arm 26 has almost reached the limit of its forward movement the val-ve 33 will have partially rotated and assumed the position to permit steam to pass from the main inlet 38 through the passage 34 of the valve 33, thence into the auxiliary steam-inlet 48, auxiliary steam-bore 49, and outlet 50and 'into the rear end of the casing 20 and throw the valve 33 forward, the` exhaust passing at the same time from the forward end of the casing 2O through the auxiliaryexhaust-inlet 47, auxiliary exhaust-bore 46,` and'exhaust-port 45 into and through the passage 35 of the valve 33 and exhaust-port 39EL to the main exhaust 39. Hereupon steam from the main inlet 38 will pass through the passage 37 of the valve 33 through the main backward portway 41 and port 19 into the forward end of the steam-cylinder 11 and cause the piston 16 to move backward toward the rear end of said cylinder 11 and the exhauststeam pass from the rear end of the cylinder 11 through the port 18 and portway 40, 4passage 36 of the valve 33, and into the exhaustport 39# and into the mainexhaust39. `As soon as the piston 16 reaches almost the extreme limit of itsrearward movement the lower end of the arm 26, which is caused to move backward therewith through the link 31 and `piston-rod 15, will partially rotate theV valve 33 and cause the same to assume the position to permit steam to pass from the main inlet 38 through the passage 37 ot' the valve 33, thence into the auxiliary steaminlet 42, auxiliary steam-bore 43, ahdoutlet 4'4 and intov the front end of casing 20and throw the valve 33 rearward, the exhaust IOO passing at the same time from the rear-end v of the casing 20 "through the auxiliary exhaust-,inlet 53, auxiliary exhaust-bore and outlet exhaust-port 5l into and through the passage 36 ,of the valve 33 and the exhaustport 39" to 'the main exhaust 39. `\Vith the completion or' the operation ustdescrilml the parts will he restored to theirinitial positions, and the operation first above described repealed. and so ou as longas steam is admitted lo the main steam-inlet 38 and exhaust pery milled xo esl-ape a! Iii.

It will he oli-erred [hat my improved valve mechanism is applrahle uol oni) to .sleampumps. hul lodirer-l-:u-ting Huid-pressure motors ol' all kinds. uo maller for\\halvpl|rpo\elhe same may he employed, and as the valve s 4 i I 1s arranged at right Aangles to the main piston and positlvely operated at or near the end of each stroke ofthe piston all possibility of the parts becoming set at a dead-point is obviated. Y

Without limiting myself to the .details of construction, which may bevaried within the scope of the invention, what I claim, and desire to secure by Letters Patent, is-

1. In a steam-motor, the valve-casing'having main steam and exhaust ports therein communicating with the motor, and auxiliary steam and exhaust ports communicating with the interior of the casing adjacent to its ends,

an oscillatory valve arranged within said casing and adapted to move longitudinally therein under the impulse of the operating fluid, a set of steam and exhaust passages arranged in said valve adjacent to one end thereof, and a set of steam and exhaust passages arranged therein adjacent to its opposite end, adapted to alternately communicate with the main and auxiliary steam and exhaust ports, and means connected to the motor for reversingthe passage of the steam and exhaust from the main and auxiliaryl steam and exhaust `ports, through the passages in said valve, substantially as specified.

2. In aisteammoton the valve-casing having main steam and exhaust ports communieating with the motor, auxiliary steam' and exhaust ports communicating with a part of said casing and auxiliary steam and exhaust ports communicating with-the opposite part of said casing, an oscillatory valve arranged in said casing and adapted to move longitudinally therein Linder the impulse of the motive iiuid, a set of steam and exhaust passages in said valve adjacent to its forward end, and a set of steam-exhaust passages in said valve adjacent to its rea-r end adapted to alternately communicate with the main and auxiliary steam and exhaust ports in said casing, and

means for actuating said valve connected to,

the motor and operated thereby, substantially as specified.

3. In a steam-motor, the valve-casing having main steam and exhaust ports therein communicating with the motor, auxiliary steam and exhaust ports communicating with the forward andrear ends of said casing,- a shaft supported partly within and partly without said casing, a valve slidably arranged upon the inner end of said shaft. and adapted to rotate therewith, a set of steam and exhaust passages extending through said valve, -a similar set of exhaust and steam passages arranged at an angle to and to the rear of the first-named set, and mechanism intermediate the outer end of `the valve-shaft and piston-rod of the motor for actuating said valve, substantially as specified. 4. In a steam-motor, the'cylindrlcal valvecasing having main steam and exhaust ports therein communicating with the motor, auxiliary steam and exhaust ports communicating 65,'

with the forward end of said casing, auxiliary steam and exhaust ports communicating with the rear end of said casing, a shaft supported partly within and partly without said casing,

a cylindrical valvearranged upon the inner 7o end of said shaft within said casing adapted to move longitudinally thereon and rotate therewith, steam and. exhaust passages arranged parallel to ea'ch other and' extending through said valve, similar steam and exhaust passages '7 5 arranged in said valve to the rear of said firstnamed passages therein, and operating mechanism connected to and arrangedintermediate the projecting end of the valve-shaft and the piston-rod of the motor whereby to'reverse 8o the valveV at or near the completion of the stroke of the motor-piston in each direction, substantially as specified.

5. In a steam-motor, the cylindrical valvecasing having main steamand 'exhaust ports 85 therein communicating with the motor, auxiliary steam and exhaust ports communicating with the forward and rear ends of said casing, a shaft supported partly within and partly without said casing, a valve arranged upon 9o its inner end within the casing and provided with steam vand exhaust passages adapted to communicate with the main and auxiliary steam and exhaust ports therein, anarm xed to the outer end of said shaft, a segmental slot 9 5 therein, an arm loosely carried by the outer end of said shaft, a stud on said last-named arm extending into the segmental slot in the fixed arm,I and a link having one end pivotally connected to the lower end of the loose arm, Ico

and its other end` pivotally connected to the piston-rod of the motor whereby to actuate the fixed arm, the shaft and valve mounted thereon, at or near the end of the stroke of the motor-piston in each direction, substantially as specied.

6. In a steam-motor, the cylindrical valvecasing arranged at right angles to the motorcylinder and piston therein, main steam and exhaust ports arranged midway of said casing I Io intermediate one main portway and the main I 15 steam inlet and exhaust and communicating with theforward end of said valve-casing, auxiliary steam and exhaust ports arranged intermediate the other of said main portways and l the main steam inlet and exhaust and commu-,1mi

nicating with the rear end of said valve-casing, a shaft arranged partly within and partly without said valve-casing,splines at its inner and outer ends, a cylindrical slide-valve arranged upon the inner splined end of said shaft, steam AI 25 and exhaust passages arranged parallel to each other and extending through said valve, a second steam and exhaust passage also extendmg through said Valve to the rear of' and at an angle to the passages {l1-st named., a, segmental erm keyed to the outer splined end of the valveslmft having a segmental slot therein, an arm 5 loosely carried upon the outer end of said valve-shaft having a, stud upon its rear surfalce extending into the slot in the keyed segmental arm, and a link having one end pivot elly connected to the outer end of the loose 10 arm,- and its other end pvotally connected to the piston-rod of the motor, substantially as specified.

Signed at the city of New York, in the county and State of New York, this 28th day of March, 1903.

LEONARD L. GRIFFITHS.

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