US1638550A - Air brush and the like - Google Patents

Description

Aug. 9, 1921. l1,638,550

J. A. PAAscHE AIR BRUSH AND-THE LIKE Filed June 4, 1925 2 Sheets-Sheen imnm ,42 i\ i f U 55 466 n -v I v l [7? MNT-(Off Jie/715 ZD@ 62.50756,

y x ftgyfs Aug. 9 1927' J, A. PAAscHE AIR BRUsHAND THE LIKEV Filed June 4, 1925 2 Sheets-Sheet?,

L Z g Patented Aug. 9, 1927.

UNITED' STATES JENS A. PAASCHE, 0F WILMETTE, ILLINOIS.

AIR BRUSH AND THE LIKE.A

Application led June 4,

This invention has to do withv certain improvements 1n air brushes and the like. One

of thelfeatures of the invention relates toimprovements in the structure of the liquid carrying and feeding mechanism.- In this connection, it is an object of thefinvention to'provide a unitary'structure in which the liquid may be carried in a cup directly sup- -ported by the air brush itself, so that the liquid will be delivered to the spray nozzle in a very direct manner and with the shortest possible path -o'f travel.

In connection with the foregoing a fur-y ther feature of the invent-ion relates to the general construction of the liquid cup itself,

as well as the manner of its attachment to.

the' body of the air brush. In this connection,.it is an object of the invention to provide a cup of such construction that its cover portionmay be definitely'connected either to the air brush or to an element supported thereby, the lower or cup portion being de,- tachable with respect -to said cover.

A further feature of the invention relates to the provision of aconstructionsuch thatv may be attachedto the air nozzle, the air jet being delivered. into the body of such brushl so that together. the partsI constitutean admirable device for loosening up 4the dust and then removing it from the surface by the combined actions of the brush and jet. Another feature of the invention relates to the provision of an improved attaching means for connecting the air-hose to. the nipple which in turn 1s attached tothe body of the device. In this connection it is an object of the invention to provide a hose at-v 1925; serian N0.- 34,803.

4ple form, one which will constantly and' permanently take -up for wear and similar changes, one which will at all times remain tight and dependable, and onewhich will not easily become jammed or stuck.

Other objects and uses of the invention will .appear from adetailed. .description ofl the same, which consists in the features of construction and combinations of parts hereinafter described and claimed.`

In the drawings:

Figure -1 shows a side elevation of an air brush embodying the features of thepresent invention having a`liquid cup directly latillustrate the details of construction; Fig. 2 shows a longitudinal section through the air brush and the connections of liquid cup thereto; v `F ig. 3 showsa View similar to that of Fig;

1, with the exception that spray and air The construction shown in Fig. 3 `is especially well, adapted foi` spraying downwardly at asharp angleinstead of in a substantially horizontal direction; i

Fig. 4, shows a side elevationv of the air brush proper, the liquid cup having been removed, and a dusting brush substituted therefor; and

Fig. 5 shows a longitudinal section through an improved control valve.

Referring firstlto Figs. 1 and 2 in particular, the air brush proper includes a' cylinf drical member 6 the body portion of which is hollow, as shown at 7', so that'it can be entered from the rear. The front -portion 8 of this body member is preferably of re-4 duced diameter, but is provided with'a bore 9 reaching backwardly to the position ofthe4 hollow body portion.v

a flow air chamber 11. Another partition 12 is also placed at the back end of thech'amber 7 ,and preferably flush with the rear end of the cylindrical member 6, as illustrated in Fig. 2. A'tube 13 is sealed* through both of the partitions 10 and 12. j

A rear cap 14 has an internally threaded flange which may be threaded onto the rear end of the body member 6, as indicated in Fig. 2; This cap Mis recessed, as 'shown at 15, so as to establish a back air chamber nozzles of diffe-rent shape have beensubstituted inplace of those illustrated in Fig. 1.,

loo

immediately behind the rear partition 12,

' said chamber communicating with thechamthreaded neck 18'.

6 so as to seal the cap thereto;

ber 11 through the tube 13. A gasket 16 may be placed at the rear end of the member reaching into a socket in the rear end of a plunger 23. lThis plunger works freely through a rearwardly reaching neck 24 on the partition 12, said neck 24 reaching into the chamber 15. The plunger 23 effects a f substantially air tight connection with the neck24, so that leakage of air at this point is substantially eliminated. l

The lower portion of the body member Gis longitudinally slotted, as shown at 25,'

and a trigger 26 has its upper end pivoted within the chamber 7 on a cross pin 27. Said trigger reaches through the slot25, just referred to.

The trigger is preferably formed of sheet metal, and during the forming operation there is established a V-shaped backwardly lfacing socket 28 close to the position of the pivot pin 27. A link 2,9 placed within the chamber 7 has one end set into said socket 28 and its rear end Within. a socket'on the front of the plunger 23. A spring 30 Within the passage 18 has its front end working against the tappet valve 22 and .its rear end against a ring 31 which is seated into the Irear end of the neck`18. This spring, of

course, tends to keep the valve seated at all times. A removable discharge nipple 32 is threaded into the front end of the passage 9,.

already referred to. By makingthis nipple removable, it is possible to attach the device to a wide diversity of different uses, since nipples of different shapes and size may be readily substituted from time to time.

vWhen the device is to be used for sprayf ing liquids such as water, gasoline, benzene, and the like, as, for example, in the cleaning of an automobile or similar surface, a liquid container is to be placed at a position where the liquid will vbe syphoned therefrom by rthe action of the air jet delivered through the nipple 32. For this purpose I have provided a liquid cup construction which I will now describein detail.

This cup includes a cover-33 having its edge portion preferably flanged downwardly, as shown at 34. A stand 35 is `threaded through the cover and locked thereto by a nut 36 on .its bottom end, as indicated in Fig. 2 particularly. The'upper end of this gether by a Wing nut or the like 37 threaded I.

down through the upper end of the stand 35 and into engagement with a notch 38 on the top side of the body of the air brush.

There is provided a hollow cup 39 the upper end of which seats against the cover 33 just inside of the flange 34, and said hollow cup 39k may be secured to the cover by one or more togglefingers 40 together with a cross bar 41 pivoted to the center of'the cover at the point 42, according to the construction disclosed in my oopending application for Letters Patentl of the yUnited States Serial No. 732,564, whiclrwas filed August 16, 1924. This construction is such that the bottom cup 39 may be very easily removed from the cover 33 for the purpose of cleaning it, and is also such that when the parts are locked together, they are joined in 'a perfectly air tight manner, and in a way which veifectually prevents leakage or spilling of the liquid.

Reaching up from the cover 33 at a point just in advance of the air nozzle 32 is av liquid syphon nozzle 43. The nozzle illustrated in Fig. 1 stands perfectly upright and has its upper discharge end and orifice 44 at a point close to but slightly below the axis of the air nozzle 32. Consequently, the

liquid will be syphoned up through said nozzle. A vent opening 45 is established in the cover so as to allow air to enter as needed to replace the liquid so syphoned. j j

As a matter of construction, T prefer to attach the liquid nozzle to the cover in the following manner: A fixture 46 has its upper end shouldered and seated against the top surface of the cover33, and said fixture reaches through the cover and into'the body ofthe liquid cup itself, being held firmly tothe cover by a nut 47 threaded on said fixture and against the bottomsurface of the cover.4 A tube48 reaches down from said fixture to a position low enough to syphon substantially all of the contents from the cup '39 so as to drain the same.

It will be noted that the air and liquid nipples 32 and 43, respectively, may be very easily changed from time to time either for the purpose of lsubstituting other nipples of different shape and size, or for renewal. For oexample, the nipples illustrated in F ig. l'are adaptedto establish a direct forward dischargev with respect to the body of the device, and are, therefore, particularly well suited for use in work where it. is desired to produce a practically horizontal spray. 0n the contrary inV Fig. 3, T have illustrated another pair of nozzles 49 and 50 for the air and liquid respectively, the air nozzle being turnedv down and the liquid nozzle forward at such angles that the nozzle is yadapted to discharge its spray downwards at an angle of substantially 45 with respect to the general axis of the body of the device. This arrangement, therefore, is especially suited for operations where it is desiredv to direct the spray downwards at a ,greater or less angle.

In connection with the foregoing it is noted that. in manipulating the device it is not desirable to tilt the same at too steep anl angle downwardly, since otherwise the tendency will be for the liquid to run out of its, nozzle instead of being syphoned out as is desired. By the use, however, of nipples of the proper shape the desired down- `ward spray is secured without the aforementioned diiiiculty being encountered.

' In some cases it may be desirable to agitate the liquid within the cup 39. For this purpose, I have provided an agitator tube 1 reaching down from'the lower end of the stand to a position close to the floor of the cup 39. This tube 51 communicates with a vertical bore 52 inthe stand 35, said bore reaching to the top of the stand and being adapted to align with a downwardly facing opening 53 in the neck of gthe body member 6. By reason .of the provision of the recess 38 in said neck 8 forl receiving the wing nut 37, assurance is had that when the wing nut is tightened up, the neck 8 will rof the opening 53 with the passage 52 aforesaid.

A valve 54 may be placedin the stand 35 for controlling the delivery of air for agitation. It will be noted that the liquid cup together with its cover may be readily removed from the neck 8 Vof the air rush proper by simply loosening up the wing nut 37. This fact makes it'possible to very readily use the air brush proper for other purposes than liquid spray. For example, it can be used for dusting or similar operations. A

As shown particularly in Figs. 1, 3 and 4, the front portion of the body member 6 may be threaded, as shown at 55, to receive a dusting brush 56, said brush being preferably provided with a back plate 57 which is threaded to take the threads 55. When using the device in this manner, it is preferred that the brush 56 be provided with a through opening 58, vand that an airnozzle 59 be placed on the device reaching through the opening 58 so as to deliver air into the body of the brush bristles 60.

The air may be delivered to the nlpple 19 at the rear end of the device in any convenient manner. However, the construction which I will now describe is found to possess many features of advantage and desirability. In thris construction the Anipple 19 is turned down at an angle 'of substantially occupy such a position as to insure registryl and is externally threaded, as shown at 61, so that the end portion of the hose 62 may be threaded thereon. A coiled wire fitting 63 may be used for clamping the hose,

more 4tightly to the nipple and for protecting the same. This wire fitting preferably comprises a helix of wire having its conwhat beyond the position of the threadsl 61.

When using this wire fitting the same4 is slipped over the end portion of the hose 62 until the convolutions of reduced size are forced snugly against the end portion of the hose. Then by turning up the fitting with a threading action it will be compelled to clamp the hose iirnily against the threads of the nipple. y

A suitable valve 65 is preferably provided for controlling the air delivered through the hose, and for this purpose the valve, shown in detail in Fig. 5 is preferred. It incl-udesabody member 66 havinga through bore 67 together with .end connections 468 and 69 which are externally threaded.

A tapered plug 70 is seated through a suitable transverse opening in .the body of the valve, said plughaving a passage 71 in line with the body portion 67. The plug l70 is preferably provided with a relatively flat sidewise reaching wing 72 by which it can be easily turned.

The lower portion of the plug is o f reduced size, as shown at 73, and its external end is threadedvto receive an end cap.74.

This cap is recessed, as shown at 75, to receive a spring 76, the other end of which sets against a washer 77 which seats against the bottom face of the body member 66.

It will Abe understood that the nipple 19 is swivelly yconnected tothe rear cap 14 by means of the union nut 21, so that the hose connection can be directed in various directions by merely loosening up the nut 21 a slight amount and again tightening'it after the nipple 19 has been turned.

It will also be noted that by the use of thel attachment herein disclosed the hose can be very readily connected to the nipple without the useof any tools whatsoever. This is a great advantage over previous hose connections with which I am aware. In connection with the above, the tapered spring sleeve serves to clinch the hose very tightly to the stem of the nipple, and the outer portion of the spring coil serves to support the hose for some distance beyond the position of the nipple' so as to eliminate breaking and tear-- in of the hose at the end of the ni ple.

'le I have herein shown an described only certain embodimentsof thefeatures-of my present invention, still I do not limit my- K self to the same, vexcept as I may doso in the claims.

I claim: v 1. In an air brush, the combination of a 'cylindrical body-member having a longitudinal bore. in its rearl portion communicating with a forwardly reaching 'passage at its front end, a partition across the .front por' tion of said bore establishing a front chamber communicating withsaid passage, apartition across the rear end of the bore, an air tube reaching through the bore and through the partition, a cap member secured to the rear end'of the cylindrical member and establishing a rear chamber in conjunction f' with the rear partition, a Valve chamber in the rear portion of said cap member, a port in the cap member betweenthe valve chamberand the rear chamber aforesaid, a spring seated tappet valve working in said port, a

trig er ivotall mounted in the front portion of t e ore o the cylindrical member, a rearwardly facing recess in said trigger, a

link reaching .between saidy recess and the valve aforesaid, anda suitable connection cylindrical body for the supply of 4compressed air to the'cap member, substantially as described.

2. In an air brush, the combination' of a member` having a longitudinal bore in its rear portion communicating with a forwardly reaching passa e at its front end, .said front-end being cylindrical.V and of substantially uniform size, an air nozzle 'at the front end of said passage,

s means for establishing a rear chamber at the rear end of the'body member, an air tube connecting said rear chamber with the front .chamber aforesaid,. means for supplying compressed air tothe rear chamber under control ofthe operator, ay receptacle for liquid comprising a cup together with a removable ca therefor, a .stand secured to said cap an having a through opening for the reception of the front portion'of the body member, there being a recess in said front portion, a screw threaded member in the stand adapted to engage said recess effectivelyvto lock the parts together, a liquid nozzle reaching upwardly fromthe cap member to a point directly. in advance of the nozzle aforesaid, and a tube secured. to the ca member andreaching between said liqui nozzle and the lower portion of the cup, substantially as described.

3. In an air brush, the combination of a cylindrical body member having a longitudinal bore in its rear portion communicating with a forwardly reaching pasage at its front end, a partit-ion across the front. p0rtion of said bore establishing a front chamber communicating with said passage, a partion of the bore of the cylindrical member, a

link reaching between said trigger and the valve aforesaid, and a suitable connection for the supply of compressed air to the cap member, substantially as described.

. JENS A. PAASCHE.

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