US2612876A - Fluid-actuated reciprocating shower - Google Patents

Description

Oct. 7, 1952 s. MAHON FLUID-ACTUATED RECIPROCATING SHOWER Filed April 2, 1948 5 Sheets-Sheet l JNVENTOR. I when/17272022 S. MAHON FLUID-ACTUATED RECIPROCATING SHOWER Oct. 7, 1952 Filed April 2, 1948 i INVENTOR. 5

5 Sheets-Sheet 2 Oct. 7, 1952 s. MAHON FLUID-ACTUATED RECIPROCATING SHOWER 5 Sheets-Sheet 5 Filed April 2, 1948 s. MAHON FLUID-ACTUATED RECIPROCATING SHOWER Oct. 7, 1952 5 Sheets-Sheet 4 Filed April 2, 1948 INVEIVTOR.

BY w 57 $11M,

Patented Oct. 7, 1952 FLUID-ACTUATED RECIPROCA'IING SHOWER Stephen Mahon,

mesne assignments, to Charles Scarsdale, N. Y.

Fort Atkinson, Wis., assignor, by

A. Frankenhoff,

Application April 2, 1948, Serial No. 18,546

This invention relates to reciprocable fluid dispensing members and fluid-actuated motors therefor, e. g., showers for performin wetting, Washing, cleaning, or analogous functions. More particularly, the invention relates to reciprocating devices of this character for use on paper machines or the like.

In the paper making art, it is essential for the satisfactory and efficient operation of the paper making process that various portions of the paper making machinery, such as the Fourdrinier wires, felts, cylinder moulds, screens, and extractor rolls, be maintained in a clean condition free of, pulp, fibers, dirt, and other debris. Water showers are ordinarily provided at the desired locations to accomplish the necessary cleaning/or washing. Water showers are also utilized for other purposes such as wetting of felts or foam breaking on stock tanks.

Such devices are preferably of the reciprocating type inwhich the shower tube and its nozzles are moved back and forth over the surface or structure to be showered. As a result of the reciprocating movement of the shower, streaking, non-uniform wetting, or unnecessary wearing, of the felts, wires, screens, or-other parts of the paper machine due to continued impingement of a liquid stream at one spot are avoided and, in addition, a substantial reduction in shower liquid requirements is realized, Reciprocation of the shower tube permits the use of fewer nozzles spaced farther apart and at the same time ace complishes an equivalent or even superior degree of cleaning at a higher nozzle pressure and with smaller nozzle orifices but with a substantially decreased volume of shower liquid as compared with the requirements of a non-reciprocating shower.

In the usual application of such showers in the paper making art, the wash fluid iswater. However, in order to insure continuous operation 6 Claims, (Cl. 121--157 of the showers and to avoidplugging of the noz- 2 haust motive fluid in a manner as efilcient and inexpensive as possible.

Accordingly, it is a primary object of the present invention to provide a novel and improved reciprocating fluid dispensing apparatus and more particularly a novel fluid-actuated motor for such apparatus.

A more specific object of the invention is to provide a reciprocating shower in which substantial economies are achieved in the consumption of valuable shower fluid and in the reutilization thereof,

A related object of the invention is to provide, in a hydraulically actuated reciprocating shower, flow control means ofatype previously unavail able for independently regulating the fluid pressure at the nozzles and the rate of reciprocation of the shower head.

A'further object ofthe invention is to provide a hydraulically actuated reciprocating shower in which exhaust motive fluid from the actuating device is combined with the fluid stream entering the shower head ortube.

An additional object of the invention is to provideyin' a hydraulically actuated reciprocating shower, a hydraulic motor inwhich exhaust motive fluid is not discharged externally of the moto;- but instead is bleddirectly into the fluid stream being supplied to the shower head or nozzle unit.

Another object of the invention is to provide:

a reciprocating shower in which a fluid from a common supply source is directed in part to the shower head and in part as motivefluid to oper ate a hydraulic reciprocating device and in which exhaust motive fluid from the reciprocating device is combined with the fluid portion beingv suppliedto the shower head.

A still further object of the invention'is to I provide, in a hydraulically actuated reciprocating shower having a common fluidsupply for boththe nozzles and the hydraulic actuator, sep- I arate control means for independently regulating fluid 'pressure at the nozzles and'the rate of":

reciprocation of the shower head.

Another object of the invention is to, in a hydraulically actuated reciprocating shower, means for combining exhaust motive fluid from the hydraulic actuator with the fluid stream entering the shower head and also control means for independently regulating the flow of fluid to the shower head and to the hydraulic actuator. I

Still another object of the invention is to provide a shower for paper machines, or the like having a reciprocating tubular shower head provide,

to sagging or bending.

Other objects and advantages of the invention will be apparent from the following =detaileddescription of the invention and the accompany--- ing drawings, in which:

Fig. 1 is an elevational viewof a-reciprocating-45.

shower embodying the novel features of my invention and illustratin the relative positions of V the shower head and the hydraulic actuator;---

Fig. 2 is a longitudinal sectional view-chem? enlarged scale of the shower head with the nozzlesshown in elevation;vv

Fig. 3 is an enlarged fragmmtaryyiewpf an...

al s t t rou h. one .of the nozzles shown in Fig. 2;

Fig. .4 is a fragmentaryg sectional. yiew...on,a 26

reduced scale of the shower head showin samodeified nozzle structure;

Fig. 5 is a longitudinal. sectionalviewofthe hydraulic motor. shown in Fig. .1 taken .along the... line 5-5 of Fig.6 and,showingthe.motorjm piston vapproachingthe. righthand. .endgof its stroke;

Fig.6 is a longitudinaLsection viewthrough thehydraulic motor,- .at 90. from. the view..shown in Fig. 5, taken principally..along..the line. B.B of Figs. 5 and.13 but. with. thesection.through,.

the.,right .end or control portion of .the. motor, being taken along the line 6-6 of Fig..15;..

Fig.3 is a fragmentarylongitudinal sectional view. similar to Fig.6 showing. the. motor piston at the extreme righthandpositionof ,its,stroke;.-. Fig. 8 is a longitudinalsectional viewsimilar to Figs. 6 and '7 but showing .themotor piston.

at the extreme lefthand position f its, stroke;v

Fig. 9 is a longitudinal sectionalview similar/i5 to Fig. 5 and taken along,the.line.9.-..9 of Fig. 8;

Figs. 10, 11,12, .13, and .14 aretransversesece..- tional views through .thehydraulicmotor. taken along the lines Ill-10, ll-H, l2.l2,;.l3|3,.

and l4-| 4, respectively, in Fig. 6;

Fig. 15 is a right end view of the device, as shown in Fig. 6;

Fig. 16 is a transverse sectionalyiew. taken. along the line 16-! 6 of Fig.2;

Fig. 17 is an elevational view-on anenlarged scale of the hydraulic motor end of thedevice showing thedetails-of the adjustablemotor supp rt;

Fig. 18 .is a fragmentaryviewof the under.

side of themotor support .takenalong theline. 0

I8l8 of Fig. 17;. and

Fig. 19 isa right end, view ,of .the. device .as

shown in Fig. 1-7.,

The reciprocating shower shownanddescribed herein for purposes of illustrating my invention, 6

but not by way of limitation,- comprises generally an elongated shower head provided with nozzle. outlets and operatively connectedat one end to a reciprocating means comprisinga hy-.

draulic motoror actuator and supported at its 7 opposite end for reciprocating movement. The hydraulic motor is provided with a fluid inlet and flow controlmeans for controllably dividing the. flow of fluid under pressure into separatestreams, one of said streams being fed directly to the shower tube and the other of said streams being diverted through the actuating mechanism of the motor. The eilluent low pressure fluid, after passage through the actuating mechanism of the motor, is combined or commingled with the first named fluid stream and the combined streams .fiow into the shower tube or head.

Althoughmy invention is particularly adapted for use in conjunction with paper machines for the.-.various purposes described above, it will be evident that the invention is not limited to this specific application and that the several features of my invention may be utilized in numerous situationsrequiring a reciprocating or oscillating fluiddispenser e. g., in lawn or garden showers for spraying .devices.

Referring, now to the drawings, one embodiment'ofthe invention is shown by way of illustrationand; as seen in Fig. 1, comprises a generally tubular shower head 20 which is slidably supported. at. its .left. .end. in. a bearing .assem bly 2l"for. reciprocating horizontal .movement thereinand operativelylconnected at its right endto a reciprocator or hydraulic motor 22 for effecting horizontal .flreciprocating. movement thereof. The hydraulic" motor 22 consists of three main sections: the motor cylinder or hydraulic actuator section 23,..the..valve section 24, andthe'. control section or fluid supply sec- ,tion 26, all of which are, described hereinafter.

in greater detail. .The valve section 24 and the control section 26 maybe considered together as a fluid delivery. sectionfor the shower head 20 and the" hydraulic actuator, section 23.

7 As seengin Eigsg2 and 16, theshower head 20 comprises a reciprocably movable. tube 21 having a plurality .of button type nozzles 28 extending through .the'wallof the tube 21 at spaced points along'its length. The tube 21 is coupled :at its right end. .to a threaded pipe or conduit 29 by means of an.internally threaded bushing 30 which is secured, as by brazing or welding indicated at 3|, to .the inner periphery of the tube'2.1 and engages the externally threaded end .of the 'pipe 29.' An'externally threaded bushing 32 having a polygonal, and preferably square, central opening (Fig. 16). engages the internally threaded leftend of the tube 21. An elongated guide:and support. member 33 having a correspondingpolygonal external cross section extends centrally. through .the. polygonal opening in the bushing '32 andis secured thereto, as by brazing .or welding indicated at 34. The open end. of the member 33 which extends through ,the bushing 32 into .communication with the interior' of the tube'21 is closed by means of a plug 3 6,-secured by brazing or welding indicated at 31, in order to prevent fluid from escaping from the tube 21 other than by means of the .nozzles 28. 1

Although the nozzles '28 may be disposed in any desired'p'attern-or spaced locations in the tube'ZJJordinaril-y,only a single row of nozzles is necessary in order to accomplish the desired functionsuch ascleaning, washing, wetting, or foam breaking.: Accordingly, it is an important feature :of.my;.invention that means are provided gzfor; :rotatively: :adjusting and releasably locking.theftube;'2l in any desired rotary posi- -tion..relati.ve :to :theycoaxial guide and support member-133 .whereby-the single row of nozzles maybe pointed-in the desired direction.

The :shower of my invention is of relatively great length and relatively narrow width with respect to its overall dimensions in order to facilitate its mounting singly or in batteries at any desired location or locations on the paper making machinery. The external shape of the showeralways possible to position the entire shower in the exact location or at the exact angle desired, and consequently it is highly. advantageous if the angular or rotary position of the shower head can be adjusted relative to the motor and the bearing structure to accommodate the needs of a particular installation. For example, when a reciprocating shower-of the type herein disclosed is utilized for cleaning a rotating cylinder mould of a paper making machine, the showerhead is preferably mounted in close proximity to the rotating cylinder mould with the liquid streams or jets from the nozzles being directed against the cylindrical surface at an angle selected for optimum washing efiiciency. In certain instances, however, dependent upon the construction of the particular paper making machine involved, it may not be possible to mount the shower head sufliciently close to the cylinder mould and withthe nozzles pointing in the desired direction unless provision is made in the construction of the shower to permit rotative adjustment of the shower head with respect to its supporting structure over a relatively wide angular range. More.- over, it may be necessary to change the angular position of the shower head from time to time since the optimum angular orientation varies with many operating factors such as the speed of rotation of the cylinder mould. v

As shown in Figs. 2 and 16, rotative adjust-1 ability of the tube 21 is achieved through a releasable locking means for coupling the left end of the tube 21 to the right end of the member 33. The left end of the tube 21 is provided with a plurality of circumferentially spaced grooves 38 (Fig. 16) which extend longitudinally and inwardly of the tube 21. A plurality-of clamping dogs 39 extend radially from'within the member 33 and through openings 4| provided in the flat sides thereof. In the specific form of the invention illustrated in the drawings (Figs; 2 and 16), the member 33 has a section and, accordingly, four dogs'set at 90 spacings are provided. The outer ends 42 of the dogs 39 are bent inwardly in the direction of the tube 21 and are adapted to be received in the grooves or recesses 38. The inner ends of the dogs 39 have flattened portions or heads 43 of greater diameter than the openings 4| inorder to prevent the dogs 39 from falling out of the member 33 when the apparatus is being dismantled or reassembled or during rotative adjustment of the tube 21.

A clamping collar 44 having a polygonal center opening 46 is slidably mounted on the member 33 and is adapted to be moved along the member 33 to permit an extended circumferential lip or rim portion 41 to overlie the bent ends 42 of the dogs 39 for retaining the same in-clamped engagement with the grooves 38. A setscrew 43 extends through the collar 44 into an o ening in one side of the member 33 in order to retain the collar 44 in clamping position when-the dogs 39 are in locked engagement with the tube 21.

When the shower has been installed machine, the direction regulated by releasing the collar 44 outwardly on the member 33,:disengaging the dogs 39 from the grooves'38 in the square external cross y one paper of the nozzles28 may be the setscrew 48, sliding 6 end of the tube 21, and rotating the tube 21 at the threaded connections at each end thereof until the nozzles 28 are oriented in the desired direction. Having thus accomplished the desired rotative adjustment of the tube21 relative to the member 33, the tube 21 may then be locked in this position by manually inserting the ends 42 of each of the dogs 39 into the nearest of the grooves 38 and then sliding the clamping collar 44 overthe ends 42 and tightening the setscrew A removable fiushout plug 43 is threadedly secured in the wall of the tube 21 adjacent one end thereof. On occasions when the shower is shut down, the plug 49 may be removed and the tube 21 flushed out with water supplied through the pipe29, as hereinafter described, in order to free the tube 2'! of any possible accumulation of for eign -matter which may obstruct or plug the nozzles 28. I v

The free outer end of the member 33 is received in and supported by the bearing assembly 2| (Fig. 1) which comprises a pair of opposedroller bearings 5| disposed-in a vertical planeto engage the upper and lower fiat sides of the member 33 and a pair of opposed roller bearings 52 disposed in a horizontal plane to engage the member 33 laterally. The bearings 5| and 52 are mounted in a supporting structure or ho-using 53 having a pair of depending plate membersor legs 54. The bearing assembly 2| is attached to a convenient portion of the paper machine, such as an upright frame portion 56. by means of a plurality of screw clamps, 51 which extend through the legs 54 into clamping engagement with the frame portion 56. The position of the bearing assembly 2| may be changed upwardly or downwardly on the frame portion 56 by manipulation of the clamps 51 to obtain alignment of the outboard end of the shower head 20.

Each of the roller bearings 5| and 52 is journaled in an elongated slot 58 in the housing 53 and is adapted to beadjustably positioned there in transversely of its axis of rotation. An adjusting screw 53 extends into each slot 58 and is adjustable therein to provide at its inner end an adjustable stop for the roller bearing. Thus. transverse movement of each bearing is limited in one direction by the end of the slot 58 and in the other direction by theinner end of the screw The transverse adjustability of the roller bearings is particularly important in the case of the upper and lower bearings 5| which guide and support the member 33 in a vertical plane. De.-

pendent largely upon the overall length and weight of the shower head 20, a certain degree of sagging or bending of the tube 21 tends to take place, inasmuch as it issupported only at its ends, causingthe member 33 to occupy a misaligned and somewhat slanted position sloping downwardly and inwardly from its outer end toward the tube 21. It will be seen that the load is borne by the lower bearing 5| resting at all times on its screw 59 and that the required rela-' tive position of the upper bearing 5| will be determined by the extent of sagging and misalign-v ment of the tube 21. Thus, if the bearings 5| are to perform their function of supporting and guiding the travel of the member 33, they cannot be disposed in fixed positions without creating, under practical operating conditions, excessive resistance against the operation of the hydraulic motor even to the point of stalling said motor or fracturing or bending the shower head. Thererare, the-adjustable"- s'erews 59 are providedtc proper relation toaccommo'date misalignment of the member 33 while I remain ng at; an times: in" rolling contact with the upper a'nd lower' side's normal operation of the hydraulic actuator section-2'31 Asdescribed below in" detail, this. condi-' tion is compensatedfor by means qr an adjustable mounting platform f base 60 (Fig; l) for the motor 22, said base being movable in a vertical plane about its pivoted outer'end aswill hereinafter appear.

Asshown in Fig. 3; thebutton- 'type'nozzle 28 may comprise a head porti'on fil and a threaded stem portion fi2 engaging a "complementary.

threaded openingin the wall of the'tube Z'I. 'The head portion BI is in sealed engagement with the tube'2'lbymeans'of alocking' gask'e't 63' and a locking washer 64'-disposed-thereoveri: Extending through the stem po'rtion '62-i's an'oriflce'or channelBB the diameter'ofwhich is greatly exaggerated in Fig. 3- for'the sake ofel'a'rity; The head portion 6| isprovidedwith a'hexagonal recess'or socket '61 communicating with the channel 66 and serving as an outletioraa fluidstream flowing through the channel 66 fioni'within the tube 21. The socket Bl alsb isadapted t'o-re'ceive' the head of a socket wrench or key employe'clifor inserting and removing the nozzles'28 froin'the tubeZ'I.

Although the diameter of the'orific'e or chan-- nel B8 in the-nozzle 28 may vary 'within relatively wide practical limits, it" is usually"preferred' to employ relatively small oriflce dianie'ters, for ex ample, of theord'er of .OOI to'0.1' inch;'in-orde1" to realize the full cleaning, wetting, orwashing power of a relatively high" pressure directed liquid stream. In general, a'numberior'factors must be taken into considerationin determining orifice diameter, among which may'b'e'me'ntioned the quantity of water needed toperform e'ifec-" tively the desired function of the shower, the' proximity and direction ofthe nozzles With respect to' the surfaceor'structure'being wettedor cleaned, and the pressure ofthe shower fluid used. In addition, on a-given' paper makin'g machine any one of theaforeme'nt'ioned factors may vary (the others-being constant) with'suchvar'iables as the nature of the shower fluid, operating speed of the Y paper machine, type and thickness of paper produced," consistency of stock, atmos pheric temperature and humidity, etc.

In order to utilize nozzles having relatively small -orifice diameters, it is important to have available an ample supply of properly filtered water or other showerliquid which is substantially free of all p'articles of "foreign matter which might obstructor plug the orifices. Accordingly, it will 'beseen,'as'hereinb'efore mentioned, that a suitable water pretreatment system is an importantadjunct to the satisfactory operation of a shower employing 'smallfdiameter orifice nozzles. In general, the required degreeof clarity of water or other shower liquid "for practical operation varies inversely with the'cross-sectional area of the nozzle orifice.

In Fig. 4 therelis illustratedan'alternative nozzle structure 68'whlchmay be more deslrable ror usein'certain situations, particularly where an adequatewa'ter pretreatment'system is not available'and it'is necessary to remove the nozzles frequently-for-cleaning purposes. In this modification, the nozzle 68 is not threadedly engaged with the'wall of 'thetube 21' but instead is provided with an'annular shoulder portion 69' which engages in abutti'ng'relationship with a compleme'ntary shoulder portion or seat "II in the wall of the tube 21. A sealing gasket 12 is disposed betweenthe shoulder portion 69' and the seat 1|. 'Ifhen0zzle68 isretai'ned in place in the tube 2'! b'y'meansof a detachable strap or band 13 which encircles'the tube 27 in overlying relationship with the nozz'leand which is provided with an opening'1'4"of' larger size than the outlet of an orifice or channel in thenozzle and is adapted to' regist'er' therewith. The retaining band or guard 13' is releasably held in nozzle-retaining pos'itionrb'y" means-of a'suitable locking device such asa buckleor-other fastener 71. Detents or'slo'tted portions TB are'proVided in the head of'the' nozzle to permit a puller tool to be inserged therein for lifting the nozzle out of its sea -It will be seen that'th'e combination of an easily removablenozzle' seated in the wall of the shower tube and a detachable guard or retaining meanscoope'rating therewith will in certain'cases be more convenient and desirable than the threaded type of nozzle illustrated'in Fig. 3.

'Referring now to Figs. 5 to 15, the structural 1 details and operation ofthehydraulic motor'22 will be described.

The pipe 29', which is coupled at its left end tothe" tube 21 (Fig.1), extends longitudinally through acylinder head 'BI (Fig. 6) in the left end of the hydraulic actuator section 23 into atworking cylinder 82 and thence through a second cylinder head 83 at the rightend of section into a fluid delivery or mixing chamber 84-in the valvesection 24, hereinafter described in greater detail; Suitable packing glands 86 and 81 are provided in the cylinder heads 8| and 83,- respectively.

A double-actingpiston 88 is carried on the pipe 29 which thus functions both as a piston rod for thehydraulic-actuator section 23 and as a fluid supply conduit for the shower head 20 in a manner to be described presently. A cored fluid passageway or channel 89 inthe hydraulic actuator'section' 23 forms a continuation of a cored channel 90 (Fig. -5) in the upper portion of the valve section 24 and communicates by means of a U-shaped bend 9| withthe cylinder 82 serving both as a'motive fluid inlet-and exhaust for the left side of the piston 88 as will hereinafterappear. Another fluid passagewayor cavity 92 in the cylinder head 83 and havingan arc-shaped transversecross-section (Fig. 11) communicates with the cylinder 82 onthe right side of the piston 88 for supplying anddischarging motive fluid, as hereinafter described. The cavity 92 is-connected by means of a-vertical duct 93 with alongitudinalcored passageway 94' (Fig. 5) in theupper portionof the valve section 24.

The pipe 29 terminates in-an open end 95 (Fig. 6) within the chamber 84 and-is threaded along a'portion of its inner end. A pair of annular collars 96 and 91, the latter being of slightly larger diameter, are threadedly secured to the pipe 29'and are adapted to be positioned in any desired abutting or spaced relation along of a suitable tool. I r The control section 26' of themotor 22 comthe threaded portion of the pipe. A pair of endwise slots 98 are formed in opposite sides of the pipe wall and by undersizing the internal threads of the collars 99 and 91 a resilient looking effect is obtained when the collars are screwed on thepipe 29 causing the slotted halves of the pipe to be drawn toward each other and thereby retaining the collars firmly in place. Obviously, other suitable means, such as set screws, may also be utilized for retaining the collars 96 and 91 against-inadvertent movement thereof.

The upper portion of the valve section 24 above the fluid delivery chamber'84 also contains a double-acting, fluid-actuated, piston-type master valve or main valve' 99 which isreciprocably slidable in a main valve'cylinder IOI.

Reciprocating movement of the valve 99 is controlled by the flow of motive fluid, as hereinafter described, through a cylindrical pilot valve I02- which is mechanically reciprocable ina pilot valve cylinder I03 having a common wall with the cylinder IOI 'disposed thereover. The'flow of motive fluid between the cylinders IOI and I03 is accomplished by means of complementary ports, hereinafter referred to specificallypin the common cylinder wall and'in the pilot valve I02 which are brought into registry by'sliding movement of the latter.

Secured to opposite ends of the pilot valve I02 by means of screws I04 are depending abutments or shiftfingers I which extend through slotted portions I01 in the bottom wall'of the cylinder I03 into the path of travel of-the collars 90' and 9?. Longitudinal reciprocating movement of the pipe 29 causes the collars 90 and '91 to engage the shift fingers I06 alternatelythereby reciprocating the pilot valve I02 in-its cylinderI03 and reversing the flow of motive fluid to the main valve 99'and the piston'80" in the cyclic manner described below. Although the-collars 99 and 9'I are shown in abutting relation in the drawings, it will be evidentthat the length of the stroke of the pipe 29 may be regulated by adjusting the distance between the collars. Bydetaching the controlsection 26, access tothe chamber 84 is readily obtained for adjusting the setting of the collars 96 and 91. Itwill be noted that the collar 9'! which is remote from the control section 26 is of slightly larger diameter'than the collar 96 tofacilitate its adjustment by means prises a fluid inlet chamber I08 (Figtjfi) having a fluid feed passageway I09 adapted 'to'be connected to a suitable liquidsupply source s'uch as clear filtered water. Manually operable flow control-valves III and H2 extend into the-chamber I08 and cooperate with valve seats'IIB and ('50 H4, respectively, to proportion the flow of fluid through a pair of inletports vI'I5 and II6,r'espectively. The fluid stream passing through port I I5 from chamber I08 enters a cored passageway III (Fig. 5) in the valve section ZIIand' is ultimately supplied as motive fluid for the hydraulic actuator section 23. The fluid stream passing through the port ,IIG flows directly, into the chamber 84 and supplies the shower head 20 through the hollow pistonrod'or pipe'. 29. A pressure gage H8 is connected :to a pressure tap'or duct II9 (Fig. 14) which communicates through a horizontal cavity I2I (Fig.5) and'avertical duct I22 (Fig. 13) with the fluid deliverychamber B0 to indicate the fluid'pressur'e therein 'which Cir isrthe pressure of the fluid being supplied through parallel streams one of which flows through the I port IIB- into the chamber 84 as the'major part of the fluid supply for the shower head and the other of which flows through the port II5 into the passageway II'I (Fig. 5) for ultimately actuating the motor. The water in the fluid delivery or mixing chamber passes through the open end 95 of the pipe 29 and flows therethrough into the tube 21 from which it is directed outwardly through the nozzles 28.

In Figs. 5 and 6, the piston 88 is shown moving toward the right-end of the cylinder 82 with the collar 99 on the end of the piston rod 29 coming into contact with the righthand shift finger I00 and ready to shift the pilot valve I02 to the right end of its cylinder I03. In this position, high pressure water entering the passageway I I! from the inlet'port H5 flows into the free space around a reduced portion I23 (Fig. 5) in the valve 99. A portion of the water flows from this space downwardly, through a port I2 1 (Fig. 6) in the common cylinder wall and another port I26 in registry therewith in the pilot valve I02, into the interiorof the pilot valve I02. The high pressure water within the pilot valve I02 exerts pressure, through a port I27 and a port I28 in registry therewith in the common cylinder wall, on the left end of the valve 99 retaining it at the right end of its cylinder I01. Water which Was previously in the right end of the cylinder I0l has been displaced therefromby movement of the valve 99 to the right, the water exhausting through a port I29 (Fig. 6) in the common cylinderwall and thence downwardly through the free rightend of the cylinder I03 and its righthand slotted opening IB'I into the fluid delivery chamber 84. The water thus exhaustedinto the -mixing chamber 84 from the right end of the cylinder I0! is combined or commingled with the portion or" fluid flowing into the tube 29 from the chamber 80. I

With the master valve 99 thus retained in its extreme righthand position, high pressure water from the passageway III (Fig. 5) flows through the reduced portion'l23 of the valve 99 and thence into the cored passageway 90 as indicated by the arrows in Fig. 5. From the passageway 90 the water flows through the passageway 89 and the bend 9| into the'leit endof the cylinder 82 (Fig. 6) thereby forcing the piston 88 toward the right. The water on the right side of the piston BBeX- hausts through the arc-shaped cavity '92 and its communicating vertical passageway 93 into the cored passageway 94 (Fig. 5). From pas- =s'ageway 94 the exhaust water flows through an wall, around opening I3I in the side wall of the cylinder IOI into the free space around another reduced portion I32 in the valve 99 and thence downwardly through an opening I33 in the common cylinder the outside of the cylindrical pilot valve Hi2, and through a 'port I3 1 in the bottom of the cylinder I03 into the fluid delivery or mixing-.chamberfl l. The exhaust motive fluid from the hydraulic actuator section'23 thus entering the chamber 80 is combined and commingled with theshowef fluid being supplied thereto through the inlet port BK Referring now to Fig." 7, the piston 88 is illus- 82' forcing thepiston through the bend 9 I,

89and,90, into thereduced portion I23 (Fig. 9), thence downwardly through a port I 31 in the common cylinder wall around the cylindrical pilot valve;- I02, through a port- I38 in the-bottom of the cylinder I03, and into the fluid-delivery v or mixingchamberv i311 tratedat the: extreindarighthand position; of 1 its stroke arrived'at ashortatimez'after' the'position ,...shown.ini Figs. 5.;and "6.1The'ipiston rod.29 has ....also. reachedsthe rightiend ofzits' stroke, :and the 'pilot..valve IJ2rha's dilrewise beenlshifted to the rightlbylengagemefit:of. the.collar:'9'6 with the .righ'thandi-shiftafinger:I06. A port I35 in the 'pilotuvalves-I02 lS'jIlOW in .registry .with the port I24,.'and:the.port I29 islnow aligned with an end port I36Hin thevalve -I02. ,.'As a result of this shifting of thepilotvalve', I 02,-highpressure water is connected to theright end ofthe master valve 99 byflowing from passageway IIT; (Fig, 5),. into .the; free. space'around "the, reduced, portion 1 23, downwardly through theregistered'ports; I24 and I35, longitudinallythrough'; the inter ior of the pilot valve I02, andaupwardly through the registered. ports I3B1and 129. intotheright end of the "cylinder IOI;, astindicated by the arrows in Fig. 7.

As the. master valve'99 begins to move toward the left, water is displaced from the left end of the. cylinder NH and, exhausts downwardly through the port I28, through the free left end of the cylinder ing I01,-and into'the mixing chamber 84 to be combined withthe water flowing therefrom to ;the shower head 20.

When the valve 99 has reached the extreme left end of its cylinder IOI,; as shown in Figs. 8 and 9,

i a; reversal of. the water ,feed and exhaust connections to-the cylinder 82 has occurred. High pressure water now flows from the passageway II'I (Fig. 9) across the reduced portion I32, through the opening I3I-into the passageway 94, downwardly through the duct 93 and the arc-shaped cavity92, and into the right end. of the cylinder 88.,t0 the left end of its stroke, as shown in Fig. 8.; Exhaust waterv moving to; the left ahead ofthe "piston 88' flows through the vpassageways of high pressure watentogthe. mas ter. valve,99 which then moves to the ,right end of itsjcylinder i0I and completes- -the cycle.

As. previously. mentioned,- possible sagging-or bending of the tube .27 will tendto cause mis- -alignment or cockingoi the piston .rod, 29 vcou i pled to theinboard end or the shower. head-2 10bviously such a condition will result in a..serious strain on the piston rod 29 and-undesirable. re-

sistance. against the normal aligned reciprocating movement of the piston 88 in its cylinder. 82.1 To

vided an adjustable. mounting platform; or base 60 which is shown indetail inFigs. 17-19.

A fiat supporting plate I39 is disposed beneath the hydraulic actuator section 23 of..the-;-motor 22. A pair of opposed angle irons I4I are disposed longitudinally beneath the plate I 39 and are secured by means of a plurality of screws. I 42 extending through the plate I39 into thecylinder heads BI and-83. .'Ijhe angle irons i I H; areiconr I03 and its slotted lefthand open- .;nected.'for. pivotal movement; :with a .pair. oillupright;angle irons [431132 means, of a pain oflbolts I43 and nuts 144,;thexupri'ght zan'gleiirons l 42:1be-

. ing fastened to a suitableizportion' of. thetpaper machinesuch as: the upright frame member. I46.

I Extending I betweenuthe; outermost; ends; 01.; the

angleirons I4,I':,and=; I4 2-;and forming a triangular structure therewith iszanqadjustable,connecting member comprising a; pair. of ielongated rods I41 and-I 48 'pivotallyi secured to a pair,ofztubular pivot members I 49, and I 5, I; disposed between the opposed sides of the angle irons I4I;andlI42. respectively.- The-rods I41. ?and; I48.are threaded at their ODDDSEdzEIId portions andzareadjustably connected by means: or an: internally threaded sleeve: or; coupling .4 52; of .-hex a ,0.na1. cross- -section.

I Byobvious-manipulation or the;-,coupling, I 52,

lowered :about the pivot points formed, by -,-the

bolts I 43 to align ,the; hydraulic actuator, section 23 w h e piston 710 a d. the e y compe sate tor-cocking, or,- slantingg ot the \latter .due to sagging or bending oithe.;sho wer.;tube-'21 ,In this manner J m-e qiel mi a e bi dmsmn ab o ma es ta e 1 t0 1 ?IDIQDQIi-DPQBH of *th miS ha a From the f re oi d c pti n: Q th o e -/tion of the1 hydraulic motor 22, it will be -;seen that in my invention all o f the;vaiuable filtered wa su m t y .su p i dto theho xe 2 0.; Exhaust motive fluid mm themaster ,valve c in r 0| i 'd swa d au c-.- e t t cylindelr 82; is not discharged externally, of, ,the

- m wt-buti te tu n i ct vn m e motor,

I ofcoredfpassageways,and-,valve: ports; within: the to the} iiuid delivery or mixing ichamber 84- which suppliesj water to :th e, shgwerhead; 20.

, is temporaril r operating the ,lnotorgwith such ,portion 1 being returned to. the maiirbody-ot fluidat a more .ad-

. ae at Thus, theshower;fluid b eing suliblied it thej'unit n dr inta r me sa e i 'e'l iibw' r ee 0t onlydoes my., ieatureoi: internal,-recircul a i n: o ex au a i x u ha ah -eb i ,advantages or compactness .and s implicit'y cit-opbut there isalso a' consideraBIe'saving of 3 .an wer re ui emen -1 e d. i i meme: 4 .;-;vvhich would be inherent in an exter nallrecirculation system wherein 'exhaust' motive fluid irom over, my invention oil the; valua le 'cl 5 reeipreaufigmeehasismenmeihvdiauueg motor Q athe; eynaaers;azi endgl'oil game eischarge then repumpedto the 1n1et' 1' ambef r,,ios..' maeliminatesl .vv'astei'ul,recycling arrmteieq-watemhrougmhe which.w'oiild b'e'l'the; case inTai'i,exter'rial system of recirculation :wner'em exhassti'mdmve' fluid; is

. combined .exteriprly' or thef'r'notorlwith' the I total my inventioriilall ofthelxhaustjiibtivelfluid is combined with n thejseniiat fl idstream' nteririg the. supply pibe zarqr thejshowerliea'df 20.

651 compensate forsuch adverse'eifects 'I have. prof Another; important nat re-e rn'y invention is the; provision ergnqeiseedent; riow-mmrm valves I Hand 2 111th: illd fillef hanilb r 1 03 whereby the fidw bf i311 Eiflllel fillfd; SITE Bill s f6 7 the shower head ha 't'o th motive mechanism; may be s'eparaitely regiilated. This is. an important advantage 'sinceit 7 0 3 permits independent control overlrelatively widexan'ges, xde'pendentiupon. the

-rluid pressure .zavailablegand upon the pressure ;..-dr opi.through;:thenmotor, or the-pressure atzthe .nozzles; 28:, and..-the rate org-reciprocation or the 1 shower-,g;,head; 20.; In"; that showers; previously available," .-no provision ,has vbeen. made :tor such '13 independent regulation of these two operating variables when a, common source of fluid supply was utilized for both the shower fluid and the motive fluid. 1

From an operating view point it is a considerable advantage affording a high degree of flexibility of performance to be able to adjust the fluid pressure at the nozzles without materially affecting the rate of reciprocation of the shower head, and vice versa. The valve HI diverts a portion of the shower fluid through the hydraulic actuator section whereas the valve H2 functions in the nature of a pressure reducing valve to maintain the pressure of the main shower stream entering the chamber 84 below the pressure of the exhaust motive fluid being supplied thereto.

With the construction herein described, the rate of reciprocation or motor speed and the shower stream pressure can be regulated by mutual manual adjustment of the valves Ill and I I2 to give any desired combination of the two operating variables. For example, if maximum motor speed is desired, valve H2 is completely'closed and valve Ill is completely open thereby permitting the entire fluid supply to flow through the hydraulic actuator section 23 and thence into the chamber 84, the pipe 29, and the shower head 20. The shower may be shut down by completely closing both valves HI and H2 to give zero motor speed and zero shower flow. High shower stream pressure with a low or moderate rate of reciprocation may be obtained by suitable manipulation of the valves Ill and H2.

Although the invention has been described primarily in connection with a single specific embodiment as illustrated in the drawings, it is to be understood that various modifications and equivalent constructions are contemplated within the scope of the invention as defined in the appended claims.

I claim:

1. A fluid-operated motor for effecting reciprocation of a fluid dispensing member comprising an elongated casing having a hydraulic actuator section at one end thereof, a fluid supply section at the opposite end thereof, and a reciprocable valve section intermediate said hydraulic actuator and fluid supply sections, a hollow piston rod extendinginto said casing through said hydraulic actuator section and terminating at an open end in said reciprocable valve section, a piston carried on said piston rod within said hydraulic actuator section for reciprocating movement therein, said piston rod being adapted to be coupled at its outer end to said fluid dispensing member, reversible valve structure disposed within said reciprocable valve section in flow communication with said hydraulic actuator and fluid supply sections for controlling the flow of a motive fluid alternately to and from opposite sides of said piston in said hydraulic actuator section, means for conducting fluid independently from said fluid supply section to said valve structure and to the open inner end of said piston rod, and means for cornmingling exhaust motive fluid from said valve structure with the fluid supplied to said piston rod.

2. A fluid-operated motor for efiecting reciprocation of a fluid dispensing member comprising an elongated casing having a hydraulic actuator section at one end thereof, a fluid supply section at the opposite end thereof, and a reciprocable valve section inter-mediate said hydraulic actu-. ator and fluid supply sections, a hollow piston rod extending into said casing through said hydraulicactuator section and terminating at an i open end in said reciprocable valve section, a pismember, an elongated disposed within said reciprocable valve section in parallel relation with said piston rod for controlton carried on said piston rod within said hydraulic actuator section for reciprocating movement therein,- said piston rod being adapted to be coupled at its outer end to said fluid dispensing reciprocable main valve ling the flow of a motive fluid alternately to and from, opposite sides of said piston, an elongated reciprocable pilot valve disposed within said' reciprocable valve section in parallel relation with said .main valve, said pilot valve being actuated in response to reciprocating movement ofsaid piston rod wherebyvto controlthe flow of motive fluid; through said main valve, means for conducting fluid independently from said fluid sup ply sectionto said main valve and to the open inner-end of said piston rod, and means for commingling exhaust motive fluid from said main valve with the fluid supplied to said piston rod. 7 3. A fluid-operated motor for eiiecting reciprocation of a fluid dispensing member comprising an elongated casing having a hydraulic actuator section at one. end thereof, a reciprocable valve section adjacent said hydraulic actuator section for controlling the flow of a motive fluid to and from the latter, and a detachable valve chamber adjacent said reciprocable valve section at the opposite end of said casing, a hollow piston rod extendinginto said one end of said casing and terminating at an open end in said valve section, said piston rod being adapted to be coupled at its outer end to said fluid dispensing member, means for supplying fluid independently from said valve chamber to said reciprocable valve section and to the open inner end of said piston rod, and flow regulating valves in said valve chamber for independently controlling the flow of fluid to said reciprocable valve section and to said piston rod, said valve chamber being removable from the device whereby to provide ready access to said reciprocable valve section.

4. A fluid-operated motor for eflecting reciprocation of a fluid dispensing member comprising an elongated casing having a hydraulic actuator section at one end thereof, a reciprocable valve section adjacent said hydraulic actuator section, and a valve chamber adjacent said reciprocable valve section at the opposite end of said casing,

an elongated hollow piston rod extending into said one end of said casing through said hydraulic actuator section and terminating at an open end in said reciprocable valve section, said piston rod being adapted to be coupled at its outer end to said fluid dispensing member, reversible valve structure including a reciprocable pilot valve in said reciprocable valve section for controlling the flow of a motive fluid to and from said hydraulic actuator section, actuating means carried by said piston rod in adjustable relation thereon for effecting shifting movementof said pilot valve in response to reciprocation of said piston rod, and flow regulating valve means in said valve chamber for independently controlling the flow of I separate fluid streams to said valve structure and to the open inner end of said piston rod, said valve chamber being detachable from said reciprocable valve section whereby to permit adjustment of said actuating. means on said piston rod for varying the stroke of said piston rod.

5. A fluid-operated motor for effecting reciprormioi'a'eve dispensingmember extend longitudina1ly' from --one i -end thereofssaid casing having 1 relatively narrow transverse 'dimensions as compared with its --longitudinal= dimension -whereby-- to -facilitate l mounting of a plurality of the motors in" close .--side-by-side relationship, a hydraulic actuator -section at said one end-ofl the casing, az fiuid supply section attheopposite end Qfsaid c'asing,

a reciprocable- -valve section intermediate said hydraulic actuator and fluid supply sections said sections being connected in end-to'--end,=-relationshipfor flow communication therebetween; a'hollow piston rodextendin'ginto said casing at said one end thereof through said hydraulic actuator section -and terminating atan open-end-in said 1 reciprocable valvese'ction-g means including cored fluid passageways extending throughsaidc'asing for supplying a motive fluidindependently-irom said supply section tothe-open' inner end of. said hollow piston rod and through-said reciprocable valve section to saidhydraulicactuator section, and means for commingling'exh'aus't'fluid-from said hydraulic actuator section 1' with fluid *supplied to said hollow piston rod.

6. A fluid-operated motor for-efiectingreeiprmcation of a fluiddispensingmember;said-motor comprising an elongated casinghaving ahydraulic actuator section atone end thereof adapted to be operativelyconnected to said fluid dispensing member, afiuid supplysection at'themppo- 30 siteend of said casing,-a reciprocable -va'lve section intermediate said-* hydraulic actuator and .116 fiuid suppl-y sections, said-sections being connected inend-to-endrelationship forflow commu- ----nication th'e'rebetweem means for conducting fluid from said fluid supply section through-said 5 -recipro cable valve' sectionto said hydraulic 'actu- --ator-sectionand i also adapted -.to supply" fluid independently to said -fluid dispensing 1 member, and meansfor commin'gling exhaust fluid --from A saidliydrau1ie--actuator section =withv thefluid 10 supplied to said dispensing-member 1 STEPHEN MAHON REFERENCES CITED he,f,o,llowing referencesgare, of record in the 1 file fOf' .t111S patent:

"UNITED. STATES PATENTS

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