US1676163A - Double-stroke working head - Google Patents

Description

July 3, 1928. 1,676,163

H. SCHLACHTER I DOUBLE STROKE WORKING HEAD Filed May 18, 1926 5 Sheets-Sheet 1 July 3, 1928. 1,676,163 H. SCHLACHTER DOK J fiLE STROKE WORKING HEAD Fil Led May 18, 1926 5 Sheets-Sheet 2 Hum H. SCHLACHTER DOUBLE STROKE womuue HEAD July 3, 19,28.v Y 1,676,163

Fi led May 18, 1926 s Sheets-Sheet 3 July 3, 1928. 1,676,163

H. SCHLACHTER DOUBLE STROKE WORKING HEAD Filed May 18, 1926 5 Sheets-Sheet 4 July 3, 1928. 1,676,163

H. SCHLACHTER DOUBLE'STROKE WORKING HEAD Filed May 18, 1926 s Sheets-Sheet 5 Patented July 3, 1928.

UNITED stare I 1,676,163 FE'EC HENRY SGHLACHTER, on BEATRICE, NEBRASKA, ASSIGNOR TO nEMPsTna iviILL MAN- UFACTURING COMPANY, or BEATRICE, NEBRASKA, A conronarionornnnansxa.

noUBLE-srRoKnwoRKIne HEAD,

Application fiieq il ay is,

arrangements within the spirit and scope thereof.

yAn object of the invent on'is to provide an. improved working head for actuating severalpump rods, that will be durable, efiicient and quiet in operation by, reason of lubrication and enclosing possibilities due to the construction and arrangement of .20

construction and assembly. With this and other objects in view, the invention consists in certain novel features in construction and combination and in arrangement of parts :and features as more Ified hereinafter.

Referring to the accompanying drawings forminga part hereof 5 Fig. 1 shows'the working head of my invention in side elevation, the top cover hood appearing in vertical section.

Fig. 2 isan end elevation, the cover hood appearing in vertical section I 36 Fig. 3 .is a vertical section taken inaplane at right angles to the axis of the dr ve -Fig. 4 is a top plan, the cover hood appearing in horizontal section. a 1 a Fig. 5 isa detail vertical section taken in a plane parallel to the axis; of the ,drive shaft. c f

Fig. 6 is a horizontal section on'the line .66,, Fig. 3 I i Fig. 7 ,'s ahorizontal section on the line f77, Fig.3. Fig. 8 shows a' modified structure in verticalsection. a Fig. 9 is a detail vertical section of the structure of Fig. 8 taken in a ,planeparallel with the drive shaft. I y t o f Fig. 10 shows the structure of Fig. Sin top plan. Y I

F g-ll Sh Sthe structure of in horiaontal section. 1

the parts, and that will be economical in fully and particularly set forth and speci-.

926. Serial no. 169,548.

IReferring to the construction of Fi gs. 1+7,

fof the drawings, the main supportingfra ne or structure (which is mounted and supported by any suitable means, not shown)- embodies a strong rigid open-top lubricant retaining gear case 1,-0n which is mount- ;ed a superstructure or elevated supporting frame, made up of a pairof approxin atelysimilar castings or other strong rigidframe .members, each consisting .of a horizontal v cross bar 2, formed with end legs 2.,that diverge downwardly. "These two framemembers are arranged side by side with the lower endsof their legs 2, seated on and bolted or otherwisefclamped or fixed to the opposite side topQflangsor edges of the gear case 1.' The elevated horizontal cross bars or heads 2, are parallel and-secured together in relatively fixed relation by cross bolts 2", or in any other suitable manner, and said bars 2 are sofrelatively formed or arranged as to provide'between tlrieir adjacent vertical side faces a vertical space for the passage and reciprocation of certain o aeratin'g members connected with or formingupright extensions of the pump grods This superstructure frame consisting of cross heads 2 and their .supporting le'gs, also supports" and provides for anchoring a pair of spaced parallel Trigid upstanding guide rods 3, at-their lower ends clamped or otherwise fixed to the heads .2 and arranged at theouter edges thereof, "and at theiruppe'r ends .thfese] guide rods are fixed to and rigidly connected by cross head .3.-

These guide rods are braced and 3", at theirupper' ends boltedor otherwise fixed to the oppos' ite., end portions of the cross head 3 at one side thereof, and at. their lower ends bolted or otherwise fixed tothe heads 2, at corresponding endsthereof.

The rotary main drive shaftet, is carried by, extends horizontally through and tothe a stiffened by spaced parallel inclined sidebrace-rods provide two identical} geared pinions, 4 1

that are in constant driving mesh with the teeth of two relatively large vertically-rotat ing parallel identical gear wheels 5, suitably m unted: a a lergies by; and Wi h n th gear box. 'In one form of my invention, these two gears 5, are fixed to the opposite endsof a common rotary horizontal shaft or axis 5 This shaft 5*, is carried by and mountedin-v a journal box arranged approximately centrally within the gear case and fixed thereto. This journal box consists of a pillow 6, fixed to and centrally traversing the'upper part of a central vertical well or .curb 1?, within and rising from the bottom of the gear case 1, and a cap 6 In the example shown, the pillow and cap have longitudinal horizontal side flanges throu jh which bolts pass to clamp the cap to t e pillow, the side flanges being recessed or otherwise formed, to permit free vertical passage of vertical reciprocating pump rod operating parts through the well 1, and at opposite side of the journal box. The Well i and journal box are arranged in the gear reciprocatory cross head slide 7, that extends horizontally between the vertical guide rods 3'and embodies vertical parallel end sleeves .7 confined to and slidable longitudinally of said rods 3, and identical pitmen 8, at their upper ends pivotally joined to said slide to actuate the same and at their lower ends eccentrically joined to the gears 5, to beactuated thereby to reciprocate said slide.

The gear wheels 5 are provided with diametrically opposite outwardly projecting crank pins 5 on which the lowerends of the pitmen 8 are mounted and confined.

At their upper ends the pitmen 8, are pivotally joined to the slide 7, in any suit able'manner, although the upper ends of the two pitmen 8, are preferably joined by a cross rock shaft 8 to the opposite ends of which the upper ends of the pitmen are secured, and this rock shaft 8 is journaled and confined in a bearing extending longitudinally through a front side extension 7", of the slide The pitmen are arranged beyond the ends of the reciprocatory slide, and beyond opposite sides of the superstructure frame 2, 2 and beyond the outer side faces of the gear wheels 5, and extend into the gear case 1,;between the vertical end walls thereof and the gear wheels 5.

And'the arrangement is such that the ver tical planes in which the pitmen operate are beyond the guide rods 3 and braces 3, so

planes. Also, the vertical plane in which the guide rods 3, are arranged is to one side of the vertical plane in which the axisb of the gear wheels 5, and the axis 8, coupling the pitmen 8, are arranged, The front side extension 7", of the slide 7, is preferably so arranged as to locate the rock shaft 8*, parallel with and in the same vertical plane as the axis 5*, of gear wheels 5.,

In the particular example shown, two parallel depending oppositely reciprocating pump rods 9, 10, appear, the rod 10, being tubular, with the other'rod 9, extending therethrough and working therein.

To the upper end of tubularsrod 10, is fixed a horizontal cross head 10", below the gear case 1, and a pair of spaced parallel vertical pump rod extensions 10, are-fixed toand rise from the cross head 10*,-and,' at

points a distance above the gear case 1, are provided with straight parallel'geared' racks 10, in upward continuation of the rods 10, and fixedly secured thereto. 7

The center rod 9, is provided with a vertical double rack 9 rigid therewith and forming a longitudinally alined upward ex tension thereof, and located midway between the two racks 10 The center double rack 9, can be coupled to rod 9, in any suitable manner or by any suitable means, although I show a yoke connection between the rod and rack to avoid the journal box 6, 6, that carries the shaft of gear wheels 5, by straddling the same. This yoke connection embodies a cross head 9", fixed to the-rod 9, and located below the journal box, across head 9, above the journal box and rigid with the lower end of double rack 9, and spaced vertical stiff tie rods 9, arranged beyond opposite sides of the journal box and secured to and connecting ends of the cross heads 9, 9 to form a stiif push and pull connection between rod 9 and rack 9t The straight rack 9?, is secured at its upper end. to the 'recipro catory cross head 7,

preferably by screw threaded connection be tween the reduced threaded upper end of the rack and threaded nipple 7 depending from and rigid with the front extension 7*, of the crosshead and located midway between the pitmen 8 and in the vertical plane of the shafts 8 5 Y Operative driving connection is established in any suitable manner between the rack 9 and the racks 10 of thepump rod extensions 10 For instance, I show the double rack 9 arranged between and in constant driving mesh with a pairv of pinions 11, which are also in constant driving mesh with the single racks 10", respectively. By this arrangement, upward movement of double rack 9*, will, through the medium of rotary pinions 11, cause corresponding downward movement of both racks 10 and down- JUN ' rods 9, -10.

ward 'inoi eme'nt of rack 9, Will cause upard movement of racks 10, and hence simultaneous Opposite reciprocation of pump The operating and controlling. connections of the pump rods 9, 10,*BXtel1'Cl upwardly through the gear case between the large gears 5 and-at opposite sides of the journal box, 6, 6 and upwardly from the gearbox through the vertical space betweenthe frame su'perstructure parts 2, 2-, to points above the same. The floor orbotto'm'o'fthe gear case pro-' vides 'a horizontally elongated narrow (vertical opening for the free passage'of said connections The gear case is cast or otherwise formed with the internal'r-annular upstanding flange oryvell curb 1, surrounding said opening and rising therefrom to' carry the journal box 6, 6, and to enable the gear case to receive and'retain, at-least tothelevel of the topedg'e of said Well orcurb, a large or deep body of lubricant.- Suitable supporting and mounting meansfor the pinions' 11, pro'- jviding'con'fining guides for the racks 9 10,

are mounted on the superstructure frame memb'ers 2,'2. j For 1nstance,lI show'a pair of parallel spaced horizontal bars, such as angle bars 12, arranged on and longitudinallyot and bolted tothe frame members 2," with the pinions arranged between the, adjoining vertical faces ot-said bars and rotatable on and ca-rriedby short horizontal parallel shafts or spindles 13 carried by-and extending trans v'ersely through saidbars." The-inner vertical'faces ofthe bars serve to guide 'and I confine the racks.

The bars"12,"canalsocarry suitable means to, bear againstthe smooth outer longitudinal edge portions 'O'fracksIjO to maintain the gearing of said "racks in' constant mesh withpinions 11. For instance,"l "show Vertically arranged-guide or bearing blocks or shoes 14, adjustablyarranged ja nd supported be-' tween the o'uter en'dsof the bars and bearing against theouter longitudinal 'edges or said racks. Thesei'shoes 14 are normally clamped to the bars b'y bolts,"bu't can be loosened and adjusted to takefu'p Wearor for other'reasons by adjustable stop bolts 14 In practica th'eu sual'cover, preferablyan open-bottom upstanding removable" sheet metal hood 15, 'is employed to rise from. the "gear case and cover the open' top thereof and enclose all oftli'e-fix'ed and Working parts rising from'or extending above the gear case, and thereby p rot'e'ct the samefandthe interior ofthe gear case from dirt and the Weather and to'preve'nt escape of lubricant. This hood is preferably oii 'o'r lubricant tight, and at 1 its annular lower edge fits on and is s'ecuredt'o the anist.

niilar top edge ;or flange of the, gear case 1 preferably to fform fa lubricantjtight the structure of Figs-.14 1

"The racks- 1811 9 extend up through a In operation, rotation ofv-the drive shaft 4:, causes simultaneous rotation of the two large crank "wheels 5-, which operateias one gear, and through-- the I medium of the two pitmen' W 8, 'w hioh 'operate as one,

the cross" head "slide': 7-, is nrecipro'cate'd longitudinally of rods The re-ck 9, se-

16, and the open bottomsection 17 the annula'r edges of saidrsectioiiaaround; said open top and bottom meeting, and the secpreferably liquid tight: joint; 2

tions are there boltecttogether to" form a.

i The bottom of the lubricant retaining gear case is formed with :a vertical openingfor the passage of the pump 1 rods 1 8,- '19, a and this opening is surrounded-by an annular flange or Well curb 20, rising Within the gear 7 case to'lretain the' lubr-icanttherei-nwu "The twopump rods 19 are connected toe gether to operate as one, and usually formed upward extensions of a tubular rod through which the center pump rod 18 extends: double rack 18 formsa rigid upward longitudinal, continuation or pump'rod =18, and thi rack is hung from and at its up'perend secured ii to :a lateral projection: 01' extension of vertically recipr ocatory crosshead' slide 21, confined-to and yertically' slidable on the fiXed-g Uide rOds-QZ These rods"22 fare secured to and irise from the gear case andare secured together .ati their upper t'ifiened by 'brace rods 23;

ends

' "The tWlIi- 'pu'm f rod extensionsi9 are resided With's'i'ngle racks 19 ,"-for:ming -up- Ward -'extension-slothereof, and these =rack's I are held by backing rollers 2 1, in constant driving mesh ;with" spur "gear pinions 215, theta-re also in constant-operative mesh with the double rackl8, so that'the operation-isas hereinbefore described With respect to vertical opening in the top ot -the gear'case; i I andthereftrom between a pa ir ot parallel spaced bars'26-"; securel. on the' top' ofthef-mo Q gear case and bridging sa aopening. The rolls-24,- and plnions 25, are" arranged; be-

tween these bars and are carried by spindles "3 65 xtending 'transversely through the pairs;- 1 1 The-twin] reoiprocatiiig pitmen 27', that reciprocateslide 21, extend fromt-he gear or crank whee1s28- in the-"lower section of the gear case, upwardly through the opening in the gear-case top, to the side extension of the slide, and are secured to the opposite ends of a rock shaft 29, mounted and journaled insaid-extension The'large vertical twin gears or-crankwheels 28, operate as one wheel, although arranged at opposite sides or ends of the gear case interior, and independently 'mounted on separate alined concentric trunions 30, carried by and projecting inwardly from the opposite end walls of the lower section 16, of the gear case. Thetwin crank wheels 28, are simultaneously driven in the same direction by twin pinions 31, on a common rotary drive shaft 31 extending across the interior of the gear I case and extending to the exterior thereof and'mounted in bearings carried by the walls ofgear casesection 16. r

The pitmenv 27, extend down through the interior of the gear case. between the crank wheels 28, I and beyond opposite sides ofv the pump rods, racks, and well 20, andat their lower endsrhave crank pin connection with said wheels 28, so-that the operation is. as hereinbefore explained with respect to the structurefirst described. a

In a practice, the usual lubricant-tight sheet metal hood,.not shown, is placed over the fixed and working parts that extend above the gear case, andis removably secured on the gear case to cover the top economy, dependability,

' means. 6

thereof :and .form a lubricant tight joint therewith and a lubricant cover.

The constructions described are rugged in structure and exceedingly durable, and are simple to construct and assemble and pro-r vide for long-time self lubrication and enclosure to prevent lubricant waste and to exclude the weather and dust and dirt.

'Materialadvantages in the matters of durability, loW production and upkeep costs, and efficiency in operation are attained, with the advantages'of a weatherproof lubricant tight encasement, and the advantageous cooperation of crank and pinion drive for oppositely reciprocatory pump rods, with crank wheel, pitman and reciprocatory slide actuating It is evident that various changes, modifications, and variations might be resorted to without departing from= the spirit, and

' scope ofthe invention'and hence I do, not

wish to limit the inventionto the approximately exact disclosures hereof 1 -What I claim is;

'1. In ;combination, .in' a double stroke working head, pump rods, a supporting gear case, a twin crank wheels mounted in said case, an elevated vertically reciprocatory- Y cross head,itwin pitmen for reciprocating said elevated cross head from said wheels, and rack and pinion means connecting the pumpjrodsfor simultaneously and oppositely reciprocating-the pump rods, said rack and tory pump rods provided with racks in upward longitudinal continuation thereof and with means connecting said racks to cause simultaneous opposite reciprocation thereof and the pump rods depending therefrom, a gear case into which said rods extend and from which said racksextend upwardly, a vertically reciprocatory slide arranged above said gear case and coupled to the upper end of one of said racks to vertically reciprocate the same, a crank wheel mounted in. said gear case, and apitman operatively coupled thereto andextending upwardly from said gear case and operatively coupled to said slide.

3. In combination, a supporting gear case, a fixed vertical slideway rising from said case and carried thereby, a vertically reciprocatory slide above said gear case and confined to said slideway, a vertically reciprocatory pump rod at its upper end coupled to said slide and depending through said gear case and vertically reciprocated by said slide, another vertical reciprocatory pump rod depending through said gear case, op erating connections from said first mentioned rod to said second mentioned rod to simultaneously and'oppositely reciprocate the second rod from the first rod, and eccentric means for reciprocating said slide, arranged within the gear case and extending upwardly therefrom tosaid slide and operatively coupled thereto. 7 V

4. A working head for' actuating oppositely reciprocatory pump pistons, comprising a gear case, a drive shaft therein, twin crank Wheels therein driven by said shaft, vertical reciprocatory pump rods extending through said case from a point below to a point above said case and arrangedbetween ing a gear case, vertical guide rods fixed to said case and rising therefrom, a vertically reciprocatory slide above said gear case and confined to said rods, oppositely reciprocatory pump rods extending downwardly through said case, one of said rods having its upper end directly coupled to said slide, the upper portions of said rods having longitudinal racks extending above said case and geared together to cause simultaneous connection with said slide above the case to opposite reciprocation, and rotary driving means wltlnn said case and having operatlve bysaid frame and in mesh with said pin- 1 ions, side ;pump,.rods extending through said v case and having racks forming the upper" parts thereof and in mesh with said pinions 'andguided by said frame, a verticallyreciprocatory slide arranged abovefsaid gear case and rframe and directly coupled to the upper end of one cat said rods to reciprocate thesame and the other rods, and rotary oper- 'atlng means arranged within the gear case -1 "said slide to reciprocate the same.

having eccentricoperating connection with -.7. In combination, a gear case',-tw1n crank wheels therein, a drive shaft, therefor, a ver tical slidewayfixedto said case, a vertically reciprocatory slide confined to dsaidisl'ideway;

pitmen from said WllGBlSj ilO said. slide to reciprocateflthe same, center vertical pump rod coupled-to said; slide andvertical-ly ;rej-

ci'procated thereby, another vertical pun p rod, ;and rack and pinion gearing connecting said pump rodsto simultaneously and oppositely reciprocate the secondrod-irom the first rod. v .[;8., In combination, a gear case, vertrca'l fixed .g'ui'de rodscarrled by-sa d case, a vers 'ticall-y reciprocatory cross head slide confined to saidrods and formed with atra'ns-' verse, tubular bearing, a transverse rock shaft. in said bearing, crank fW-heels in said case, pitmen actuated byrsaidcrank- Wheels and extending upwardly and attheir upper ends coupled to saidw-shaitfto reciprocate said slide, oppositely reciprocatoryupump rods, and P,lnl0ll,,11fld qrack transmission means operatively. connecting saidrods to cause simultaneous and opposite reciprocation, one of said-rods being directly coupled"- tos'a'id-slid'e and reciprocated-thereby.

,9. A- working "head for rmulti-pisto'n" pumps,;;comp ri'sing, in combination, a sup portinggear case having .a top opening and a bottom r openin'g, several reciproca-tory pump rods extending down through-. said 'case'fronia point above the same to a: point below the same, a power tIfi-DSIIll-SSIOHDPGP- ativelyconnecting said rods abovesaid case to cause simultaneous opposite reciprocation thereof, a rotary drive: shaft within said case, a rotarymember within said'lcasef'and driven by said shaft,*and operative connections actuatedbyvsaid member for recipros catingsaid rods and coupled to the upper end'of one of said-rods above said case and embodying gu ding-means. above a'ndrcarrled by the case and a pitman. extending upwardly from said me m'ber, to a point above;

said case.

10. A working punrps, comprisiilgg-iir combination, a supporting -encase;ment arranged to contain lubricant,f a-drive shaft, a rotary member driven/thereby, several reciprocatory pump rods, operative connections -between said rods to reciprocate-saute simultaneously iny0p. posited-lrections, suitable crank and 'rec1-p-- head n1ulti-piston I rocating cross head connections-between one I I of said rods and said member :to reciprocate I said rod and arranged 'ztoiconvert rotary motion into reciprocatory movement and means for retaining said-rodin vertical alinemen-t during reciprocation, said connections' beingin part located exteriorlyofand above said encasement; Y

'l lyA working head for? driven thereby, several tr'eciproc'atory pump 7 rods, said encasement providing a vertically open well -forthepassage of. said rods sun rounded-by 4a lubricantexcluding curb oper ati-veconnections between said rods-to -rec1procate' same simultaneously in opposite directions, suitable connections between one of said rods and said" member arranged to soonvert rotary JTISOfilOIhlIl-EO reciprocatorysmove ment and means for retaining said rod in vertical alinementuduring' reciprocation.

:l2. A Working head for ,multi-piston pumps, comprising in -:combina'tion,-a support ng encasement arranged .to contain 'lubrlcant, a "drive shaft, a: rotary member mu-lti-piston pumps, comprising in combination a sup-. porting encasement arranged @to (contain I 'lubricanha. drive shaft, a, rotar'yi member driven thereby, several.reciprmatory pump,

rods wwith suitable intervening;connecting gear mechan sm .to cause their simultaneous o osite reci rocation under the o eratin' 2'3 power-of one ofthe /ro ds-,xoperative connec-.

'tions between one of said rods andsaid member jto-reciprocate said rod. andguiding means .for sa d connect-ions, said 'COHIIGCtlOIlS extending ,aupvvardly from "said-imember to said rod and arranged to-"convert' ro tary motion 'intorecipro c'atory movement. I

7:13..In combination, alubricant contain- 7 ing encasement, a' fixed frame above 'said' encasement with pinions mounted-therein, a'

center pump rod exten'ding tlirough 'said encasement and having a double rack torming theupper part th'ereofand guided by said" frame and in mesh with said pinion's,

side pump rods extending through. said case and having racks forming the upper parts thereof, andin mesh-with ,saicl-pinions1a'nd guided by said; frame, averticalIy'recipro- 'c'atory slide arranged above said gear case and frame and directly 'c'oupledto the upper end ofone of said rodst'o reciprocate the I same and the other rods', rotary operating 'means arranged' within the encasement having eccentric operating connection extending upto'said slide to reciprocate the same;

and a weatherproof, oil retaining hood to cover said mechanism and encasement.

14-. A pump Working head comprising several vertically reciprocatory rods connected'together to simultaneously reciprocate in opposite directions, in combination with a vertically 'rcciprocatory slide operatively connected to said rods to drive the same, a rotary" driving member operatively connected to said slide to reciprocate the same, a supporting-base for sai'dheadembodying a lubricant retaining gear case in which said rotarymember is mounted to travel in the lubricant, said case having a well extending vertically therethrough and formed by a vertical lubricant retaining curb, said case beingopenat the top, an open' frame fixed to and rising-from said case to a point-above its open top, said rods extending into saidframe and through said case and the well therein, a vertical slide way carried by said frame, said slide being confined tosaid-slideway and elevated above said casingy-and a removablehood open at its bottom and covering and rising from said vcase and enclosing said frame,-slideway,

slide and other parts abovesaid case.-

15. A pump workinghead comprising a vertically reciprocatoryslide, a fixedvertical slideway therefor, a rotary driving member, and eccentricdriving connection therefrom to said slide to reciprocate the same, in combination fwith several fvertically reciprocatory upright rods, gearing connectin said rods to cause opposite reciprocation thereof, at leastione of said rods coupled to said slide for driving the rods, agear case'forming a lubricant receptacle and having-an open top through which the operating parts within the case are accessiblegsaid rotary driving member being arranged within the case-to operate in the lubricant't-herein, said rods extending through the case from below to above the same, said slideway beingiarra'nged above theopen top of the case with said'shde confined to said slideway, and a removable cover hood rising from the case and covering its open top and enclosing and protecting said rods,,the slideway, theslide and other parts above said case. i

16. A working head for a-pump comprising a gear case having a well opening through the bottom thereof and formed W *ith a vertical annular curb, whereby the case forms a lubricant receptacle, a rotary driving member mounted in said case .to work in the lubricant, fixed slide rods carried by and arranged above said case, a' vertically reciprocatory cross head slide above the case and confined to said slide rods, a slide actuating pitman extending from said rotary member upwardly to said slide, several'vertically :re-

ciprocatory rods extending through said case rev-area on said case and protecting and enclosing all of said parts above the case. 7

l7. Ina pump working head, incombination, a supporting base embodying a gear case havingan open bottom well surrounded by anannular vertical'curb'whereby the case forms a: lubricant retaining receptacle, twin cranlrWheels in said case besidesaidowell to work in the'lubricant, a drive shaft in the ease for said wheels, a vertically-reciprocatory slide and its guiding means above said case, twin pitmen extending from said slide downwardly into said case exteriorlyof said well and actuated by said wheels, several reciprocatory pump rods extending upwardly through said well and the case to a point above the case and driven by said slide, and means abovethc case operatively connecting said rods to reciprocate in unison in opposite directions.

18.-- In a pump working head,- in tion, a supporting gear case open at the top and forming a lubricant retaining receptacle, whereby operating, parts Withinthe case are accessible through its opentop,- a removable weather excluding lubricant-retaining hood rising from and carried by said case and forming a top cover therefor, said-hood open at its bottom and fitting'the top of the case around its open top, several'reciprocatory rods extending upwardly through said'case from below and into said ho0d,;and means for driving said rods in unison in opposite directions said" means protected'by said hood, and acce'ssibleywhen the hoodis removed, and comprising arotary driving member in" said j'case, a reciprocatory slide, and operating connection from the member to the slide, said hood being vertically removable from and applicable to said case asaunit.

19. In a pump working head, in combina, tion, a supporting gearcase forming a'lubricant retaining receptacle and having an in-; ternal' open top and bottom well surrounded by an annular vertical curb, 'risingi-i'n-said receptacle to an elevation above the lubricant level, a transverse journal box carried by said curb, a shaft mounted in said box and at its ends provided with crank wheels at the exterior of said well to work inthe lubricant in said case, a vertical slideway carried by the case and arranged above the same, a vertically reciprocatory slide confined to said slideway, twin pitmen for actuating said slide and extending down into tending upwardly through said Well and the case and operatively coupled .to said annular vertical curb, a transverse journal box carried by said curb, a shaft mounted 'in said box and at its ends provided With crank 'wheels at the exterior of said Well to vwork in the lubricant in said case, a'vertical I day of May, 1926.

slideway carried by the case and arranged above the same, a vertically, reciprocatory slide confinedto said slideway, twin pitnien for-actuating said slide and extending down into said case at the outer sides of said Wheels and actuated thereby, and several simultaneously oppositely reciprocatory pump rods extending through said. Well and the case,

of said rods being ofiset around said box and coupled to said slide, means being provided to cause said rods when driven by said slide to reciprocate in unisonin opposite directions. Y I

V Signed at Beatrice, Nebraska,

HENRY SCHLAOHTER.

at opposite sides of said journal box, one" this 13th

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