US2186214A - Liquid atomizing device - Google Patents

Description

Jan. 9, 1940. H F slMON l 2,186,214

l l LIQUID A'IoMIzING DEVICE Filed sept. 22, 1936l 2 Sheets-sheet 1 2 2 f 20 I7 '9 |82 as l2 I u 27 394Mo 622 7 5 9 o 1 47 29 f 23,4 46 23 37 n /45 [8 2s '5/ 3 4 '3a 2 f4 4'6 4644 42 M f `8 2i 20 y I9 i 3. 434s? Q 2 Y l2 39 |847 26 7 3435 6V s mw, 4 @je 3 l, h lnvenTor 30 Herman FSmOD 32 by/MQJMM- H. F. SIMON 2,186,214

LIQUID ATOMIZING DEVICE Filed Sept. 22, 1936 2 Sheets-Sheetl 2 'lnvenTot Harmonv F Simon Patented Jan. 9,1940

#PATENT o FFlcl-z 2,186,214' LIQUID A'roMlzING DEVICE Herman F. imon, Lunenburg, Mass., assignor to Parks-Cramer Company; Fitchburg, Mass., a corporation of Massachusetts Application September 22, 1936, Serial No.v101,946

` 14 claims. (Cl. z99s9) My `invention deals with that type of liquidatomizing devices in which the energy ofcompressed air, or of any other suitable elastic uid under pressure, is used to generate and distribute a ne spray'of liquid particles, and in particular.

' with atomizers in which compressed air is utilized as the agency for atomizing water for the purpose of humidication. I

Many efforts have been made to produce an l0 apparatus of this general type provided with special means for conveniently clearing the channels and ports of such atomizers of accumulated deposits Without disassembling and reassembling .the atomizer, but the resulting increase in mell chanical complexity has proved a serious disadvantage. Y

VIt is therefore an object of my present invention to provide relatively simple and inexpensive means adapted for automatic penetration of the l0- ports of the atomizer to thoroughly clear them of deposits whenever' the supply of actuating fluid is interrupted and also adapted for the automatic withdrawal of the port-cleaning instrumentalities upon the resumption of the supply of iluid so as to maintain continuous operation y of the atomizer except when the supply of uid is purposefully interrupted. I

' For convenience in description and identification, I Yhereinafter dene the type of atomizer involved in my invention as a self-cleaning atomizer. 'I'he elastic uid under pressure supplied to the atomizer, such as compressed air, is similarly dened as the atomizing huid and the liquid to beatomized as "the liquid." 'Since atomizing units of this type necessarily possess outlet ports both'for the atomizing iiuid and for the liquid, such outlet ports are similarly dened as the fluid port and the liquid port.

"self-cleaninggtomizers are especially desir- 4 able for purposes of humidiiication, in which art it is common 'practice to use automatic means responsive to variations in moisture content of' the atmosphere to interrupt and resume the,

supply of atomizing uid, as occasion requires, Y in order'to regulate the deliveryof moisture thereby to control the content of moisture in `the atmosphere.

Whenl self-cleaning atomizers are to be used 5o for humidicatiou, it is especially important to air pressure causes incomplete atomisation and results in the delivery of an objectionably coarse v spray or dripping. i

It is therefore a further object of my invention to provide automatic port-cleaning means -for first penetrating and closing the liquid port 5 eifectively in response tothe first appreciable fall in pressure following any interruption of the uid supply and before penetrating theuid or air port, and, conversely, to provide uid-actuated means for first opening the air port eiecl0 tively and only opening the liquid port subsequently in response to resumption of the uid supply, thereby effectively to prevent the delivery lof liquid except when atomizing iiuid is being delivered at its full atomizing capacity. l5

To this important end my invention provides fluid-actuated means adapted for separate and positive motivation of the respective port-cleaning instrumentalities operable to first withdraw the fluid port-cleaning means and subsequently 20 the liquid port-cleaning means from their re.- spective ports in response to the supply of uid under pressure, thereby to position them for continuous atomizationy only while atomizing iiuid is being supplied.- '25 My invention also provides other means adapted to positively return the port-cleaning instrumentalities to their respective ports independently of each other, the return of the water portcleaning means preceding the return of'the 3o air port-cleaning means. This arrangement for the independent and serially reversed motiva.- tion of the port-cleaning instrumentalities is an outstanding characteristic of my invention.

It is desirable to avoid the use of pistons for 35 moivating the port-.cleaning means 4in selfcleaning atomizers because of the friction inherent in piston packing and the inevitable wasteful loss of atomizing fluid by leakage past piston packings during periods when the atomizer is 40 in operation. It is also desirable tol avoid the exposure of anypart of the liquid supplywhile passing through the atomizer to the pressure of the atomizer uid, since any such contact between the uid and the liquid tends to cause in- .termittent atomization.

- It is therefore a :further object of vmy invention to provide a duid-actuated means for motivating the port-cleaning instrumentalities foroperative atomization of such a nature and so v ,supply of liquid and of preventingthe wasteful escape of the atomizing iiuid while the atomizer is in active operation. The of a single flexibly movable fluid-tight means suitably positioned to perform all of the above functions is another important and outstanding charac-v therefore a further object of my invention to provide simple' means for eiecting the desired motivation of these instrumentalities independently of each other and in predetermined se- Y quence as hereinbefore explained.

When atomizers are used for humidification,

it is usual to supply them with water' from a constant levelby taking advantage of the aspirating action of the atomizer. While the preferred em'- bodimentni myinvention herein disclosed isintended to be supplied with water by aspiration, I do not limit myself to aspiration, for my invention is equally-applicable to atomizers of this class irrespective of whether they are supplied with water under pressure or by aspiration.A

The preferred embodiment of my invention herein disclosed is shown in a form adapted to be embodied in an atomizer that is'already in wide commercial use and is disclosed in my earlier United States Patent No. 1,476,774vg`rantedvDe- Y cember 11,'1923.

In this particular construction airis supplied' vto the atomizer through an obliquely-disposed port adapted to give a swirllng motion Yto the .iet

of spray leaving the atomize but this is not a feature essential in any way to my present invention.

.The essential characteristics and advantages of l my present invention are unaii'ected by such conthe nozzle,

sideratlons as the path by which the atomizing uid reaches its outlet port, or whether the mechanism essential to my invention is designed as an integral-part of the atomizer as a whole or as an attachment to clean an existing part of a usual type of .atomizer as in the embodiment herein disclosed.

It will therefore be clear to those skilled in the art that my invention contemplates its'practical application to any suitable type of atomizer in which liquid is atomized by the Aenergy of uid under pressure and is not in any way limited to the particular embodiments herein disclosed.

Preferred embodiments of the invention are .illustrated inthe accompanying drawings, in

which:

Fig. 1 is a longitudinal sectional view o f an assembled self-cleaning atomizter showing the movable partsthereof in the operative positions which they vassume when the atomizer `is supplied with an atomizing fluid under pressure, such as compressed air:

Fig. 2 is' a similar longitudinal sectionalview showing the movable parts in 4the normal inoperative positions towhich they are moved when the supply of atomizing fluid under pressure is interrupted;

Fig. 3 is a transverse sectional view on line l-l Fig. 2 of the tubular conduit and the plunger which is mounted therein; showing also' the passage for supplying 'uid under pressure to the pressure chamber, the casing -`not being shown in section; Y i

Fig. 41s an end elevation of the inner end 'of `viewed from me right toward the left;

periphery of the diaphragm and for the central 'aperture therethrough; and

Fig. 'I is a fragmentary, vertical, sectional view of a modified form of spray outlet construction particularly adapted to insure accurate alinement of the fluid outlet port and the liquid outlet port in the nozzle.

Fig'. 8 is a diametrical sectional view on line l-8 Fig. 6 on a larger scale.

A suitable embodiment of the invention is illustrated in Figs. 1 to 4 as applied to an-atomizing head of the type disclosed in my prior Patent No. .1,476,774 aforesaid. The atomizer illustrated comprises a-head I, which may be of. substantially spheroidal form, having a stem 2 provided with` an externally-screw threaded base 3 adapted to be connected by a suitable union to a pipe for supplying gaseous fluid undery pressure thereto. The stem 2 is bored axially to provide a conduit 4 for the atomizing fluid under pressure,

such as compressed air, and a relatively small,

'duct or port 5 leads preferably obliquely into a cylindrical atomizing chamber 6 in the head I tangentially.to the cylindrical wall thereof, the

arrangement being such that the iiuid under pressure entering the chamber 6 tangentially willl impart a whirling motion to the fluid present therein and escaping therefrom.

The wall of the chamber 0 is countersunk and screwthreaded to receive a cylindrical exe tension upon la cap 'I which has an outwardly:

hanged shoulder adapted to engage the outer end of the head I and is providedgwith a countersunk, relatively thin, centrally apertured wallA to provide a positively positioned fluid outlet port B from said-fluid chamber. The rear portionl of the' head I is bored longitudinally and is provided with an internally screw threaded portion terminating at its rear endin a conical seat l adapted to be engaged by a complementary conical shoulder upon a casing I0 which houses thev means forsupplying liquid to the atomizer head and the cleaning mechanism for the outlet ports for'the atomlzlng fluid and liquid respectively..

A 'Ihe casing'is formed in two sections, the front section comprising a cylindrical nipple II having: -an externally screw threaded portion adapted to engage the internally screw threaded rear portion of the head and is provided with a cylindrical extension I2 whichpasses through and ts within a complementary aperture in a web whichv forms the rear wall of the atomizing chamber I.

The casing preferably is provided with an hex- Vagorlal portion I3 Aadapted to be engaged by a suitable tool to screw the nipple into the head.

The casing is alsoprovided rearwardly of the hexagonal portion with an outwardly extending wall Il having a rearwardly offset iiange. I5. adapted, in conjunction with' a single flexible member such as a diaphragm I6, which is clamped between thegsections of the casing, .to

form the wall of a pressure chamber I1 for the atomizing iiuid -under pressure. v

- One o f the important features of the invention consists in providing a diaphragm composedv of synthetic gums which when properlyl compounded may be made of suitable elasticity for the purpose employed and are superior in strength and durability to rubber; while possessing the further. im-

'portant advantage of immunityto deterioration when exposed to lcontact with oils which would scribed is undesirable.

cause serious deterioration of rubber diaphragms.

The more volatile components of the oils which are used for the lubrication of air compressor cylinders are always-'present in compressed air and tend to condense in the piping system connected with the air compressor and the terminal devices as a result of the fall in temperature in the compressed air before it reaches the terminal devices, such a's the atomizers in a humidifler system. On this account the use of rubber diaphragms in atomizers of the type herein de- Careful tests of atomizers of the type herein described having diaphragms composed o f synthetic gums have provedl that when the diaphragm has been subjected to hundreds of thousands of actuations in the presence of unusual quantities of oil, no perceptible deteriorati'on of the diaphragm is produced, although rubber diaphragms subjected to like conditions would have seriously deteriorated. The use of diaphragms having such characteristics as the motivating mechanism for atomizers is believed to be noveland vto form a valuable contribution to the art.

'Ihe other section I8 of the casing preferably is of substantially cylindrical form having a forward enlarged portion I9 provided with a flange 28 complementary to the ilange I5 and secured thereto by a union nut 2I which is preferably knurled on its outer surface for convenience in making up theunion. 'I'he periphery of the diaphragm I6 is clamped between thecomplementary flanges I5 and 20. The rear wall 22 of the casing section I8 is provided with a. rearwardly extending nipple 23 adapted for'convenient connection to a pipe for supplying water or other liquid to the atomizer. The central portion of the wall 22 is provided with a port 2l having a conical wall 25 forming a -valve seat. The rear cylindrical portion of the casing section I8 forms a chamber 26 for the liquid which is supplied to the atomizer head. Liquid is supplied from the liquid chamber 26 to the atomizer through a cylindrical tubular conduit 21 which slidably lits an axial bore in the front casing member I0 and is provided with an internally screw threaded front end portion which receives an externally screw threaded extension of a nozzle 28, the end portion of which ls tapered and adapted to penetrate and to clean and fit the outlet port 8 for the atomizing fluid.' 'I'he nozzle is further reduced in diameter at. its extreme tip to provide the desired difference in diameter between said tip and the fluid outletv 8 when the parts are in operativfe position illustrated in Fig. 1. .\'I'he boreof the vnozzle'28 is` reduced at a point adjoining its outlet to the preferred minimum diameter which determines the Arate of escape of uid therethrough when the atomizer is in operative position, as shown in Fig. l." V

The rearward portionof the'tubularmember 21 is emerged toprovide a shoulder 28 adapted to engage the front wall of the pressure cham-,g` ber I1 and limits the forward movement of the tubular member. This shoulderis cut away at Ath'elower portion to permitcommunicationv between a channel leading from the. atomizing chamber 5 to 4the pressure chamber I1. The

largement 30 providing a'shoulder against which thediaphragm I5 is clamped by a nut`3I which is vscrewed upon the rearward en dportion of thev l tween the nut 3l and the end wall of the slide Il.

tubular member` Suitable means are provided forlconi'luctingA atomizing fluid under pressurev from the atomizing chamber 6 to the fluid pressure chamber I1.' In the particulary construction illustrated the -lower external portion of the tubular conduit 21 iscut away or slabbed longitudinally to provide a channel 32 through which the fluid under pressure can pass from the atomizing chamber 5 of the head to the pressure chamber I1. Desirably the rear wall of the port 5 is cut away to provide a passage 3'3 leading to the channel 32 so that fluid under vpressure will be continuously deliv-.

sage for the fluid under pressure from the 'port 5 to the channel 32,- the rear face of the enlargement 34 of the nozzle isprovided with an annular groove 35 through which the fluid under pressure-may ow from the passage 33.to the channel 32 irrespective of the rotatable position of the slabbed-oi portion of the tubular'member the nipple is screwed into'the head.

By reason of the construction above described fluid .under pressure will be introduced into the pressure chamber immediately after it is admitted to the vaporizing chamber 6 and will when thereupon force the diaphragm rearwardly. thus withdrawing the nozzle from the iluid outlet port until it is arrested by engagement of the shoulder on the enlargement 34 with the end of the nippl'ee extension I2. The nozzle is thus placed in oper-r ative position so that the liquid, which passes through the tubular conduit 2-1 and nozzle 28, will be'atomized by the whirling motion o f the atomizing fluid as it escapes from the outlet nozzle 8.

The invention further provides automatic. mechanism for cleaning the liquid outlet port of the nozzle-when the nozzle is restored ative position as illustrated in Fig. 2.

Y\. The preferred mechanism sh'own inthe accompanying drawings comprises a non-cylindrical plunger 35, preferably of triangular cross section, as illustrated in Fig.` 3, having a forward cylindrical end portion of reduced diameter adapted slidably to t within the bore of the nozzle 28 and provided with an axial. pin 31 adapted to penetrate and clean the liquid outlet of the nozzle when the parts are in normal inoperative position illustrated in Fig. 2. 'I'he rear end of the plunger' 38 is provided with a reduced screw to inoperthreaded Aportion which is engaged by complementary internal screw threads in a boss 38 inv the rear wall of a cylindrical slide 33 which is reciprocably mounted in the cylindrical portion I8 of the rear casing section. The slide 38 is provided with a cylindrical reduced portion 4 8 providing a shoul er 4I adapted tobe engaged by one endof a spir Aspring I2, the other end of which is seated against the inner face of the end 22 of,

the casing, the4spring acting normally to force the slide forwardly. The front end of the slide 39 desirablyfis provided` with an annular ange forwardly, as illustrated in Fig.' 2;l A- relatively lighter spiral spring N, which is interposedbepermits the tubular conduit to be withdrawn as soonj as lluidunder pressure enters the" pressure l0 atomizing fluid, a valve 45 for the liquid inlet the fluid outlet in the nozzle 28, thereby avoiding the production of a coarse spray or a dripping from the nozzle duringl the initial operation of the atomizer.

In order to prevent backward escape of the liquid from the fluid chamber 26 when the atomizer is disconnected from its supplies of liquid and port 24 .is connected to and actuated by the slide 38' to which the plunger 36 is connected.` In the preferred construction the valve 45 is provided with a stem 46 which is in axial alinement with the plunger and has a screw'threaded end which engages the internal screw thread of the boss 38.

By reason of this constructionv the tubular conduit 21 will be withdrawn to-open the outlet port '8 for th'e atomizing fluid under pressure before the valve 45 will be removed from its seat. When, however, the pressure of the atomizing uid in the pressure chamber I1 is further increased the diaphragm I6 will be forced rearwardly, thereby 'forcing the slide 39 rearwardly, withdrawing the plunger 36 from theA nozzle and the pin 31 from ,the atomizing chamber 6. The rearward movethe outlet port of the nozzle, so that liquid may be supplied to the nozzle. At the same time the rearward movement of the slide 39 removes the valve 45 from the valve seat 25, so that liquid can flow from the supply into the liquid chamber 26 of the casing, thence through ports 41 in the rear end Wall of the slide into the liquid,chamber 48 from which it will flow alongside the non-cylindrical plunger 36 to the nozzle and will :be drawn from the nozzle by the aspiration of the fluidunder pressure escaping from the outlet nozzle 8 of ment of the slide 41 is limited by the engagement of `the annular flange 43 of the slide with laA shoulder 48 at the junction of theenlargedportion of the rear section of the casing with the cylindri-- cal portion thereof. The longitudinal -dimensions of the casing section I8, the slide 39', the tubular conduit 32, the plunger 36, and -the point of -connection of the latter to the diaphragm are pur# posely predetermined to insure complete withdrawal of the pin 31 from thev outlet nozzle when the parts are mutually engaged in their extreme as illustrated in Fig. 1.

rearward positions for operation of the atomizer,

When the atomizer is operatively connected with sources of fluid under pressure and of liquid, the admission of atomizing fluid under pressure to the atomizingchamber 6 causes the iiuid u nder Vpressure to ow through the channel 32 and build up pressure in the pressure chamber I1.

The rst appreciable increase in pressure in the pressure chamber I1 will cause displacement of the inner portion only of the diaphragm, againstthe comparatively light resistance of the spiral y spring .44, thus causing the withdrawal of the tubular conduit 21 and the nozzle 26 fromits inoperative position and permitting fluidto escape vthrough the opened -iiuid outlet port 8 before it is possible for liquid to escape through the liquid outlet in the nozzle 28. As the pressure continues to increase in the pressure chamber I1, the enlargedhexagonal portion 3 4 of the nozzlewill be forced into contact with the end of the nipple extension I2, thus predetermining the-operative p0- sitions of the outlet port 8 and the tip of the liquid nozzle 28 for full atomizing capacity, as illustrated in Fig. l'.

Further increase of the fluid pressure in the complete withdrawal of the pin 31' from the liquid outlet of the nozzle. At the same time the rearward movement of the slide 40 will remove the valve 45 from the valve seat 25, thereby admitting the liquid from its source of supply to the liquid chambers of the atomizer.

It is to be particularly observed that this serial withdrawal of the moving parts and the complete opening of the fluid outlet prior to opening of the liquid outlet makes it impossible for liquid to escape at the risk of partial atomization before the full atomizing effect of the escaping iiuid is available to insure' complete atomization, and this separate andpredetermined serial motion of the -operative parts is an important feature of my invention.

When the supply of fluid under pressure is interrupted or discontinued byv any cause Whatever, the rst material fall in the fluid pressure to which the diaphragm is subject permits the relatively strong spiral spring 42 to move the annular slide 39 and plunger 36 forwardly, thereby causing the pin 31 to penetrate and clean the outlet port of the liquid nozzleand the cylindrical end of the plunger to close the bore of the liquid nozzle, thus cutting off the supply of liquid to the nozzle. At the same time the valve 45, which is secured tothe slide 34, is moved forwardly so that its valve 45 seats upon the valve seat 25, thereby shutting olf the supply of liquid from the source to the liquid chamber of the atomizer.

Meanwhile the remaining pressure on the'central portion of the diaphragm increases the compression of the light spring 44, thereby preventing the forward movement of the tubular conduit 21 and its attached liquid nozzle until after the liquid port of the nozzle has been closed by the prior action of th heavy spiral spring 42.

When the pressure to which the diaphragm I6 is subject has fallen sufliciently to permit the expansion of the light spring 44 against the re- *y duced pressure of the central portion .of the diaphragm, the tubular member 21 and its attached nozzle-28 will be moved forward to penetrate, clean and close the fluid outlet port 8, but not until after the escape of liquid from said nozzle has been made impossible. This predetermined serial motion of the operative parts of the atomizer is also an important feature of.

the invention and it.wi1l be observed that by these predetermined serial and independent motions of the movable parts, the escape of liquid under any conditions which might cause incomplete atomization is positively avoided.

' It is also to-be observed that the position of the diaphragm relatively to the casing and to the moving parts is designed positively to prevent the .escape of uid under pressure either to the outside' air with consequent waste during the operation of the atomizer, or to any portion of the mechanism which will expose the liquid passing through the atomizer to the pressure of the .atomizing iiuid, a circumstance which is highly undesirable, since any such access of iiuid under pressure to any part' of the water supply will cause highly objectionable intermittent atomizing ac- 9,135,914 tion as a result of intermittent escape of vgaseous feature and maybe omitted altogether withoutchanging substantiallyk the. desired operation of the device, for the movable parts of the device have been found to operate serially and in the desired order above described when the spring the rod 31, forming an extension thereof as hereis omitted, owing to the elasticity of the diaphragm itself and to the relatively high sensitivity of its central portion to the lower fluid pressures. Y

The spring, however, is a desirable means for attaining more positive control of the motions of the movable parts and. for predetermining their desired positions.

The embodiment of the/,invention shown in,

Figs. 1 to4 is suchthat the self-cleaningmech,-

anism maybe produced as an article of manufacture for vapplication to usual commercial `atomizer heads of the type disclosed in my prior patent aforesaid.

A modified embodiment of the invention is ilv lustrated in Figs. 5, 6 and. 7, which is particularly adapted for an article of` manufacture. In this construction substantially the same port cleaning lFigs.' 1 to 4.

and closing mechanism is used as that heretofore described; and the same numerals are employed to designate'parts similar those illustrated in In thisconstruction the' atomizer comprises a head 50 havingan annular-screw threaded extension 5lv and a casing 52 screwed upon said extension and presenting with said head a spheroidal 'form and'extending. rearwardly therefrom in such "manner 'as to-present a stream lined contour over whichair flowing by the inductive effect of the'atcmizerwill minimize the accumulation of lint," dust1` `or other foreign -material upon: the latomizer head,` thereby preventing such an accumulation of yan exces'sfof foreign material of thi'sfcharacteras would vcause it to drop-upon the machinery 'beneathithe'head which in textile mills islikely' to engage and be carried into lthe fabric or other` material.,bein`g processed. -'I'he rear end' 53 of thecasing 52` is provided with a screw threaded'V nipple 54 adaptedy to be connected'jto a..sut9fb1e Supply of liquid. A valve port 55 is` provided centrally of the nipple Iand hasVv a conically.. inclined wall forming the V.valve seat.

. The head 50,:as in the previously described is provided with' a` stemf 2' having an externally screw threaded ,base 3 adapted tobe .Q ,connected by a;suitable,union-to a-pipe for supplying gaseousv fluid funder.v pressure and is bored: s axially to provide a conduit lforthefatomizing fluid 'underi pressure witha relatively small duct I" 5 leading preferably'obliquly into-an atomizing chamber 6' so that ythe fluid :under pressure enmerging Ainto thefcontour lof vthe head, and is provided With sockets 51 to .receive a socket wrench. by 'meansv of which itf-can be screwed itothenead.

The liquid. is supplied to the. atomizer by a.

. tubular member' 5l, which is in all respects similar to that illustrated and described in the preceding embodiment except that` it is not slabbed on for providing a e for the atomizing uid under pressure to the pressure chamber. The tubularmember 58 is'provided with a nozzle Il which normally penetrates the fluid outlet 6 of the cap 56, v

The means for cleaning the nozzle may be, and desirably is, identical with the plunger 36 and tofore described. r In the construction disclosed in Fig. 5, the diaphragm I6 is clamped between the casing 52 casing member heretofore disclosed is omitted in this construction. In order more effectively to secure the diaphragm in place and to prevent tearing of the same,- the periphery of the dia-- phragm de sirably is provided rwith a thin sheet metal binding' 59 and a similar binding 60 Ais provided for the wall of the aperture in the central portion of 'the diaphragm which is clamped by the nut 3l against the cylindric enlargement 30 of the tubular member. a

The diaphragm I6 in this construction, asin that. previously described, provides the `rear wall of the pressure chamber I1 and air is introduced into the pressure chamber"` in this construction directly through the p'ort 6| which communicates with the conduit 4 and the pressure chamber I1. The reary end of the plunger 36 in this construction, asin that previously described, is provided with a screw .threaded end portion which is vengaged by complementary'v internal screw threads ina boss 38 in the rear wall ofthe cylindrical slide 39 which, like that previously described, is

reciprocably mounted in the cylindrical portion of the casing sa'. 'rne'fmnt end orme sude ssj has a similar flange'l which engages vthe dia.- f

chamber 2s. is controlled 'gby thevalve 4'5, which is connected to and yactuated by the' slide 39 to phragm, ,The liquid inlet yport 55 to the fluid which the plungerlis connecteddn the manner heretofore describedf The operation of the'meimismillustratedinf4 Fig. 5 is vin all respects similar to that` heretofore described, but the construction is one which cani be manufactured more economically lfor A.sale fasi. an article of manufacture, whereas the, previous construction is so" designed as to'llbe capable of embodimentiintomizers' ofthe type disclosed in 4tratec'l in Fig. 'lwhichy enables the loutlet port for the atomizing fluid tobe readily Apositioned with 1 laccuracy in axial alinement with the port of the nozzle through whichthe. liquid .is discharged.

my prior patentwhich have been previously in- Y A further modification of the invention is illus-l m thisyeonstructibthe from end .of thehead I vis partially fac'edfoff at right `anglesto the lon- .gnudinai exis or the atqmizer and 'provided with f an externally threadedextension 62 presenting a ,v

flat end. .Acap luwhich presents a s pheroidall external .contour `adapted. to .merge into, the` spheroidal. contour ,ofutheheam is providedv with l' a flat face complementary to the .flat face o f-the,

head.V The cap 6 3 has. a. lcentral recess Aof somewhat'greaterdepth than the lengthof. the

screw threads complementary to the threads on extension 62 audits wall is provided with internal i relatively large outwardly diverging conical cen y tral opening 65 in axial alinement with and communicating with the recess 64.

In the construction shown in Fig. 7 the outlet port instead of beimg bored through the cap is bored centrally through a relatively thin ilat disk 66 .of somewhat smaller diameter than that of the recess 64 and the disk 66 is adapted to be clamped. by the` cap against the flat end 61 of 10 the extension 62. The cap is provided with suitable sockets 68 to receive a spanner wrench. 4 y By reason of this construction the nozzle may be placed in its normal position to penetrate and close the outlet port and the disk applied to the nozzle and the cap then screwed up to clamp the disk firmly against the shoulder 61, thus causing the disk to assume a position accurately concentric with the nozzle outlet. This construction has the advantage of reducing the degree of ac- Il curacy of manufacture that otherwise would be necessary to insure concentric alinement of the atomizing fluid outlet with the liquid outlet.

It will be understood that the particular embodiments of the invention disclosed herein are 85 of an illustrative character and not restrictive of the meaning 4and scope of the following claims.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is: Y

1. A self-cleaning atoniizer having an outlet port for an atomizing fluid under pressure, a relatively movable cleaning member for said fluid port forming a conduit for the liquid and having a liquid outlet port positioned in cooperative rela- Y I5 tion to said uid outlet port, an independentlyv movable cleaning member for the liquid outlet port, resilient means causing said cleaning members respectively normally to penetrate and clean,

' one, the said iiuid outlet port and the other said liquid outlet port, and means including a single` diaphragm operating only in response to pressure `of said atomizing'uid to withdraw and position the respective port cleaning means for atomizing operation.

2. A self-cleaning atomizer having `an outlet port for an atomizing fluid under pressure, a relatively movable cleaning member for said uid port forming a conduit for the liquid and having a liquid outlet port positioned in cooperative relation to said fluid outlet port, an independently movable cleaning member for the liquid outlet port, resilient means of different strength causing said cleaning members respectively normally to penetrate and clean, one the said iiuid outlet .55 port and the other said liquid outlet port, and

means operated by the pressure of the'atomizing iluid in opposition to the respective resilient means first to withdraw the cleaning means from the fluid outlet port and thereafter to withdraw the cleaning means from the liquid outlet port, to

positions adapted for e'ective operation of the atomizer.

3. A self-cleaning atomizer comprising an out- 'let for atomizing fluid, a slidably movable tubular conduit for liquid operatively connected with -a supply thereof and havingV an outlet nozzle atomizing iluid to maintain said plunger, said 75 liquidoutlet and said fluid outlet in relative pomeans acting respectively upon said tubular confrom the uid outlet and subsequently to withsaid fluid outlet by penetration thereof, a noncylindrical plunger slidably movable within and coaxially of said liquid conduit and having an extension adapted to clean said liquid nozzle by penetration thereof, means for supplying liquid 15 to said liquid conduit, a flexible diaphragm connected toI said tubular conduit and separating said atomizing fluid from the liquid supplied to said conduit and operating only in response to the pressure of said atomizing uid toV position Vindependently said plunger and said liquid nozz'e with respect to said iiuid outlet for eifective atomization, and resilient means operating respectively upon interruption of the supply of atomizing duid to move said tubular conduit and g5 said plunger independently of each other' rst to cause said plunger to close said liquid nozzle and Y thereafter to cause said liquid nozzle of said tubular conduit to penetrate said fluid outlet.

5. A self-cleaning atomizer comprising a head having an atomizing chamber provided with an outlet port, and having a pressure chamber communicating withsaid atomizing chamber, means for supplying liquid to said head comprising a casing connected to said head, a tubular conduit 35 slidably mountedI in said head having a nozzle 'concentric with and-adapted to penetrate and cleanl said fluid outlet port, a plunger within said tubular conduit having means to penetrate and clean the outlet` of said nomle, .resilient duit and said plunger to eifect penetration and cleaning of the respective outlet ports, means for withdrawing said conduit and said plunger from port-cleaning positions including a diaphragm having a thin metallic binding clamped between said`casing and said head and connected to said tubular conduit and operated by the pressure of the atomizing fluid rst to withdraw the nozzle draw said plunger from the liquid outlet and thereafter to maintain said nozzle and plunger in ypredetermined positions adapted for effective operation of the atomizer while supplied with atomizing uid.

6. A self-cleaning atomizer comprising a head having an atomizing chamber provided with an outet por't, and having a pressure chamber communicating with said atomizing chamber, means for supplying liquid to said head comprising a casing connected to said head, a tubular conduit slidably mounted in said head having a nozzle concentric-with and adapted to penetrate and clean said iluid outlet port, a plunger within said tubular conduit having means to penetrate and clean the outlet of said nozzle, resilient means acting respectively upon said tubular conduit and said plunger to effect penetration and cleaning of the respective outlet ports, means for withdrawing saidconduit and said plunger from portcleaning positions including a diaphragm having a thin metallic binding clamped between said casing and said head, and having a central openingthe wall of which is provided with a thin metallic binding embracing said tubular memu ,simultaneously to open the inlet port tosaid liqber and clamped thereupon and operated -by the pressure of the atomizing fluid first to withdraw the nozzle from the uid outlet and subsequently to withdraw said plunger from the liquid outlet and thereafter to maintain said nozzle and plunger vin predetermined positions adapted for 'eiective operation of the atomizer while sup-- plied with atomizing fluid.

7. A self-cleaning atomizer comprising a head having an outlet for atomizing fluid, a relatively movable conduitfor, liquid having an outlet nozzle adapted to clean said fluid outlet by penetration thereof, a plunger for cleaning said liquidl trate said fluid outlet and to cause said plunger to penetrate said liquid outlet.

8. A self-cleaning atomizer comprising ahead having an atomizing chamber 'and an outlet for `atomizing fluid, means for vsupplying atomizing. iiuid under pressure thereto, a slidably movable tubular conduit for liquid operably connected With the supply thereof and having a nozzle adapted to penetrate and clean said fluid outlet, a plunger slidably movable within said-tubular liquidconduit having .means to close and clean said liquid nozzle by penetration thereof, an elastic diaphragm composed of synthetic gums of greater strength and durability than rubber Aand resistant to deterioration in the presence of oils connected to said tubular conduit and acting upon said plunger operating in response to the operating pressure of said atomizing -uid tov maintain said plunger, said liquid outlet and said fluid outlet in relative positions adapted for eiective operation of the atomizer, and means operating upon interruption of the supply of atomizing iuid rst to cause the plunger toy penetrate and close said liquid nozzle and subsequently to cause said liquid nozzle to penetrate and close said fluid outlet.

. 9. A self-cleaning atomizer comprising a head having an atomizing chamber provided with an outlet port, means for supplying atomizing uid under pressure thereto, means for supplying liquid to said head comprising acasing connected to said head provided with a borein axial alinement with vsaid uid outlet port and an enlarged portion divided by a exible Huid-tight diaphragm into a pressure chamber and a liquid chamber having an inlet port,means for conducting atomizing fluid to said pressure chamber, a tubularconduit communicating with said .l

liquid chamber reciprocably mounted in said bore and having a liquid outlet nozzle adapted to penetrate and clean said fluid outlet, a. plunger within said tubular conduit having atits front emik means to penetrate and clean said nozzle outlet and at its rear end a valve for the inlet uid chamber.

10. A self-cleaning atomizer comprising a head having an atomizing chamber provided with an outlet port, means for supplyingatomizing fluid under pressure thereto, means for 'supplying liquid to said head comprising a casing connected to said head'provided with a bore in axial alinement with said iluid outlet port and an enlarged portion divided by al flexible fluid-tight diaphragm into a pressure chamber and a liquid 'chamber having in its rear wall an inlet port for the liquid, means for conducting atomizing fluid to said pressure chamber, a tubular conduit communicating with said liquid chamber reciprocably mounted in said bore having a liquid outlet nozzle adapted to penetrateand clean said fluid outlet, means connecting said tubular conduit to said diaphragm, a plunger slidably mounted in saidtubular conduit having at its rear end a valve to engage said inlet port and at its forward end a plunger adapted to penetrate and clean said liquid outlet, means mounted on said plunger operatively engaging said diaphragm, means for limiting the-rearward movement of said tubular conduit`whereby `further actuation of said diaphragm -by said atomizing uid will withdraw said plunger from said nozzle and remove said valve from said inlet port, and means for successively restoring said plunger and said tubular conduit to outlet-port-closing positions uponrelease of pressure in said pressure chamber. l

11. As an article of manufacture a liquid supplying and port cleaning device for atomizers having a head provided with an outlet port for atomizing uid under pressure comprising a hollow casing having a nipple for attachment to the atomizer head and provided with a bore in axial alinement with the fluid outlet port of said head,- a diaphragm dividing said casing into a pressure chamber and a liquid chamber, a tubular conduit reciprocably mounted in said bore communicating with said liquid chamber and connected to said diaphragm and havinga nozzle adapted, when assembled upon said head to penetrate and clean said fluid outlet port, a plunger reciprocably mounted in said tubular conduit having means to clean and close said nozzle, means for admitting atomizing uid under pressure into said pressure chamber to cause said diaphragm to withdraw'said nozzle from the fluid outlet, means for arresting the withdrawal of said nozzle at a predetermined distance from said Auid outlet, means operated by further pressure tc permit effective operation of the atomizer and resilient means in said casing acting respectively on said tubular conduit and said plunger to return said nozzle and plunger respectively to outlet port cleaning position upon release of, pressure in said pressure chamber.`

12. A self-cleaning atomizer comprising a spheroidal head having an atomizingchamber provided with an outlet port and a pressure chamber vrearwardly of said atomizing chamber, a rearwardly 'extending casing detachably con- Y nected to-said head forming with'said head an assembly presenting a stream lined contour and providing a chamber for the liquid having at its rear end aninlet port, a diaphragm clamped between said casing and said head forming'the rear wall of said pressurechamber, means for supplying atomizing fluid underpressure to said atomizing chamber and said pressure chamber, a movable tubular member communicating with said liquid chamber extending through: and connected to said diaphragm and having a nozzle normally penetrating and closing said fluid outlet port and moved by said diaphragm upon introduction of fluid under pressure linto said fluid chambento withdraw said nozzle from said iluid outlet port to apredetermined position permitting effective operation of the atominer and means operating upon discontinuance of said iluid pressure to return said nozzle to uid outlet penetrating and'cleanng positions.

13. A self-cleaning atomizer comprising a casing containing a cylindrical terminal chamber having a central outlet port and an inlet port for admitting atomizing fluid under pressure to said chamber in va direction substantially tangential to the cylindrical wall thereof, thereby to impart a whirling motion to said fluid when escaping from said outlet, a liquid supplying member slidably movable to penetrate and clean said voutlet port and containing a passageway for said liquid terminating in a nozzle positioned in cooperative relation to said uid port,.an independently movable member for cleaning said liquid nomle, resilient means for causing said movable members normally to penetrateA and clean the one said uid port and the other the nozzle outlet port, and

means operable by the pressure of said atomizing uid to withdraw and position said port-cleaning members for atomizing operation.

14. A self-cleaning atomizer comprising an outlet for atomizing fluid, a slldably movable tubular conduit for liquid operatively connected with the supply thereof and ,having an outlet nozzle adapted normally to clan and close said.

uid outlet by penetration thereof, means for normally closing and cleaning said liquid outlet, and ilexible means operating in response to the pressure of said atomizing uid, first to open said i -rluid outlet by withdrawal of said nozzle there- HERMAN F. vSILION'.

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