US1608438A

US1608438A - Air-brush nozzle

Info

Publication number: US1608438A
Application number: US34801A
Authority: US
Inventors: Shelburne Augustine
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-06-04
Filing date: 1925-06-04
Publication date: 1926-11-23
Anticipated expiration: 1943-11-23

Description

Nov. 23 1926.

A. SHELBURNE AIR BRUSH NozzLE Nov. 23 1926. 1,608,438

v A. SHELBURNE AIR BRUSH NOZZLE Filed June 4, 1925 2 Sheets-Sheet 2 jme/y fr f 'e/ afp@ Patented Nov. 23, 1926.

PATENT OFFICE.

AUGUSTINE SHELBURNE, F SOUTH PASADENA, CALIFORNIA.

AIR-BRUSH N OZZLE.

Application led June 4,

This invention relates to air brushes and more particularly to air brush nozzles and the object of this invention is to provide an air brush nozzle which will produce a uniform spray.

Another object is to provide an air brush nozzle in which the inner liquid ,nozzle is formed integral with an outer air nozzle.

These objects are attained by the disclosure herein set forth by the following description of the accompanying drawings, in which:

Figure 1 is a vertical section taken through an air brush having the improved nozzle applied thereto. y

Fig. 2 is a front elevation of the air brush nozzle. A

Fig. 3 is a section through the air brush nozzle and a portion of the air brush taken on line 3-3 of Fig. 1.

Fig. 4 is a rear end elevation of the air brush nozzle with the cap remover.

Fig. 5 is a side elevation analogous to Fig. 4. v

Z5 Fig. 6 is a front elevation of the air-brush nozzle.

Fig. 7 isa section to the air brush nozzle, taken on the line 7-7 of Fig. 6.

Fig. 8 is a front elevation of the cap of the air brush nozzle.

Fig. 9 is a Side elevation of the cap.

Fig. 10 is a section through the cap taken on the line 10--10 of Fig. 8.

Referring by numerals to the accompanying drawings, an air brush is generally designated at 10, having a barrel 11 and a delivery head generally designated at 12. The barrel 11 terminates in extension 13 having a tapered bore 14 through whichv ext-ends a tapered shank 15 formed on the lower portion of the delivery head 12. The shank 15 is provided with a bore 16 which enters a horizontal bore 17 formed in a horizontal portion 18. terminating in a threaded porf tion- 19. The lower portion of the shank 15 is threaded as indicated at 20 and is adapted to receive a cou ling 21, carrying a paint tube 22. The hea 13 of the barrel 11 has a fiat bottom face 23 and an annular depending boss 24.

A cap generally designated at 25 has an opening 26 adapted to receive the boss 24.v 'The cap 25 has a flat face 27 and is held in 1925. serial no. 34,801.

place on the extension 13 by a screw 2S. The deliveryhead having the shank l5 is 55 held in place by an expansion coilspring 29 engaging the nut 30. A horizontal bore 31 extends through the barrel ll and enters au annular recess 32 formed in the extension 13. The shank 15 hasan annular recess 33-ad- 60 jacent the recess 32 and oppositelyI disposed lateral openings 34 form a passage between the recesses 32 and 33.v

The vertical bores 35 extend upwardly y, from the recess 33 and meet with horizontal 65 bores 36 which enter an annular depression 37 formed in the end of the horizontal por tion 18 of the delivery head 12.

The end of the portion 18 has a fiat face 38 and is of cylindrical` form. The air 70 brush nozzle constituting the invention is generally designated at N and is constructed as follows:

The air brush nozzle is preferably formed from a piece of hexagon brass rod and has a tapered external face 39 which is of slightly less diameter than the hexagon head 40. The inner liquid delivery nozzle is formed within the center of the nozzle and has an internal bore 41 and extends outwardly and 8 rearwardly beyond the head 40 and terminates in a threaded shank 42.

The head 40 has an annular depression 43 and a counter-bore 44 adapted to engage the face 38 and extend over the edge ot' the B5 cylindrical portion of the portion 18. A plurality of apertures 45 extend inwardly from the depression 43 and enteran annular opening 46 formed in the forward end of l the nozzle which forms the end of the outer nozzle 47 The annular opening 46 is threaded as indicated at 46st and' terminates in an internal tapered seat 48 which is of slightly larger diameter than the external diameter of the threads 47.

`Four equally spaced lateral apertures 49 are formed in the nozzle and intersectthe apertures 45 for a purpose later described. The exterior of the inner nozzle is tapered as indicated at 50 and terminates in a cym0 lindrical tip 51, the interior of the nozzle being tapered as indicated at 52 and termii hating in an internal straight bore 53, within the tip 51.

In order to concentrate the flow of air passing through the apertures 45 and annutapered -bore 54 terminating in a flat faceI 54, and has a fiat outer face 55 and an opening 56 is formed in thecenter of the cap.

The exterior of the cap has a fiat annular face 57 and upset threads 58 are formed fthe up thereon. A tapered face 59 of slightly larger diameter than the exterior of the threads 58, is formedv on. the cap on the end opposite the' annular lface 57, within an in' ternal recess 60, infa head 60B. The threads 58. of the cap are adapted to engage the threads 47 ofthe nozzle and when-screwed into place the-tapered face 59engages the seat 48 and the opening 56 surrounds the tip 51, thus providing.,r a uniform clearance generally designated at A between the interior of theopening 56 and the exterior of It will benoted that'the annular face 57,

of the cap C, fits within the annular opening 46 of' the nozzle, and that a clearance is.

lett between the end 47 of the nozzle and the internal recess 6 0 of the cap.

From the above it will be seen that an air brush nozzle having a-' uniform air passage surrounding the liquid nozzle is provided. If desired, a spreader attachment may be provided, generally designated at 61, which is adapted to fit over the exterior of the nozzle. The spreader attachment is in the form of a frustum conical body 62, having an internal tapered bore 63 adapted to engage the tapered face 39 of thenozzle. The spreader is provided with aI pair of oppositely disposed extensions or wings 64, through which extend passages 65 entering an internal annular recess 66, having apassage 67 adapted to register within the lateral aperture 49. The spreader attachment is held in place on the nozzle by a leaf spring 68 which engages the inner side of the cap C and projects into the recesses 69 formed in the wings 64. The nozzle may be used with or without the spreader attachment.

A needle valve 70 having a reduced diameter point 71 .extends through the bore 17 and inner vnozzle 50. the reduced point 71 extending through the tip 51. The needle valve is adapted to regulate the flow ofthe liquid from the inner nozzle and is mounted 1n a cylinder generally designated at 72, which is screw threaded into the portion 18 of the delivery head, and is normally held in the position shown in Fig.' 1, by an expansion spring 73 within the cylinder 72 and engaging a head 74 on the stem 70a of theneedle valve 70.

A sleeve 75 surrounds the cylinder 72 and a nut 76 is screw threaded on the end of the needle valve. A trigger 77 is pivotally mountedat 78 on an arm 79 and a link 80 forms a connection between the trigger and.

the sleeve 75.

A check valve 81 is mounted ina recess 82 and engages a seat 83. The check valve has a stem 84 which engages a in 85 on the trigger 77 and is held seated y anexair regulating device vgenerally designated f at 92 mounted on the end of the barrel 1 1.

The airbrush operates in the usual manner, namely, when'the tri ger 77 is vpulled 'bacia-air will pass throng the passage 90,

the bore 31, into the recess 32, through vthe openings 34 into the recess 33, thence "i through the vertical and horizontal bones35.

and 36 where it is delivered to the airbrush nozzle. The air enterin the nozzle will pass through the plurality `o apertures 45, thence between the internal bore 54 of the capfC.

and the exterior of the inner nozzle 50, thev iow' of the air being concentrated `-asv it.'

passes through the clearance A. It will be understood that when the'trigger is pulled l back to admit air, the needle valve'is also pulled back by the mechanism shown, fin

order to increasethe flow"v of paint.

' When the spreader/ attachment the?. position shown in Figs. 1, 2 and 3, a portionv of the air passingfthrough the a erturesfrt will enter the lateral Vopenings and pass into. the annular recess 66 Ain the spreader attachment, thence throng 'the assage 67, and passages 65, which will direct) sitely disposed streams of -air aghainst the atomized mixture issuing from lt e nozzle proper, and produce a .fm-shaped s ray.

When it is desired tothe nozz e with.

out the spreader attachm'exltwhich produced 'the fan-shaped spray, the reader attachment is rotated 45 in'ether irection, which will bring the passage .6Lout of. registration with anyone of the-'apertures 49,. thus cut- Y ting oi the air enterin the" assages 65.

the oppollt) Whenthe spreaderattac ment '1s in thev po- .sition shown in Figs. 1, 2 and 3, a vertical fan-shaped-spray is produced vand when the spreader attachment is rotated 90 a horizontal fan-shaped spray is produced.. l

It will be particularly noted that the inner li uid nozzle and outer air nozzle are forme integral and that when the cap C is screwed into place the opening 56 in the cap will be sitively and accurately ,cen ired around tllg tip 51 of the inner liquid nozzle, due to the tapered faces of the cap engaging the tapered seat in the end of the outer air nozzle. Y

From the above it will be seen that an air brush nozzle is provided which will produce a uniform spray.

threaded portion, a cap having external threads to engage with the internally threaded portion of the outer nozzle, an external tapered Jface adapted to engage the internal tapered tace of the outer air nozzle, an inner liquid nozzle formed integral with said outer air nozzle, said inner liquid nozzle having an internal bore and a tapered portion with a tip extending through an opening formed in the center of the cap. A

2. An air 'brush nozzle comprising an outerair nozzle havingr an internal tapered seat and an internally threaded portion, a cap, said cap having an external thread and an external taperedfaee adapted to engage the internal tapered face of said outer air nozzle and an inner liquid 'nozzle formed integra-l with said outer air nozzle, said inner liquid nozzle having an internal bore, a tapered portion and a tip extending through an opening formed in the center of said cap.

3. An air brush nozzle comprising an outer air nozzle, an inner liquid nozzle formed integral with said outer air nozzle, said inner liquid nozzle having a threaded extension adapted to be screwed intothe end of a delivery head of an air brush, said outer nozzle having an internal tapered seat, a cap having a tapered face adapted to engage said internal seat of said outer air nozzle, said inner liquid nozzle having a tapered portion terminating in a tip adapted to extend through an opening in said cap, there being an annular rov7 of apertures lying parallel with said inner nozzle forming air passages through said air brush nozzle.

4. An air brush nozzle comprising an outer air nozzle, an inner liquid nozzle formed integral with said outer air nozzle, said inne-r liquid nozzle having a threaded extension adapted to be screwed into the end of the delivery head of an air brush, said outer nozzle having an internally threaded section and a tapered internal seat on the outer edge thereof, a cap having external threads to engage with the internal threads of the outer nozzle, the cap having an annular internal recess, the inner Wall of said recess being tapered to fit the internal tapered seat of the outer nozzle, the said inner liquid nozzle having a tapered portion terminating in a tip adapted to extend through an opening in said cap, there being an. annular roiv ot apertures lying parallel `vvith said inner nozzle forming passages through said air brush.

In testimony whereof I have signed my name to this specification.

A. sHELBURNn.