US2550404A - Attachment for airbrushes - Google Patents

Description

Ap 1951 CHASAN ETAL 2,550,404

ATTACHMENT FOR AIR BRUSHES Filed June 19; 1947 .7 2 Sheets-Sheet 1 A TTOKNE'Y April 1951 l. C HASAN ET AL 2,550,404

ATTACHMENT FOR AIR BRUSHES Filed June 19, 1947 2 Sheets-Sheet 2 YIIII'III) BY 5/ 01v 01,45 411! rO-ZWW ATTORNEY Patented Apr. 24, 1951 ATTACHMENT FORAIRBRUSHES Isaac 'Chasan, George Chasan, and Simon *Chasan, Brooklyn, N. Y

Application June 19, 1947, Serial No. 755,793

Claims.

This invention relates to air brushes such as are used'by artists, and aims to provide certain new and useful improvements therein whereby the general efiiciency, utility and convenience of the user, are enhanced.

A" further object of the invention is the provision of an attachment for air brushes by means of which the jar containing the paint or color may be readily attached to or removed from the brush and another jar containing a dilferent color may be as readily attached in its place.

The above general as well as additional and more specific objects will become apparent in the following description, wherein characters of reference refer to like-numbered parts in the accompanying drawings. It is to be noted that the drawings are intended for the purpose of illustration only, and that it is neither desired nor intended to limit the invention necessarily through the medium of the attachment of this invention, in slightly modified form.

Fig. 4 is a fragmentary side'elevational view of the air brush and jar of Fig. -3, but utilizing the attachment substantially in the form illustrated in' Fig. l. 1

Fig. 5 is a, plan view of the device shown in Fig. 3 with the air brush in its entirety omitted, thus illustrating only the jar and the attachment which inthis form is fixed to the cap of the jar.

Fig. 6 is a sectional view taken on the line 66 of Fig. 5. a i

"Fig. 7 is a sectional view takenon the line 11 of Fig. 1.

- Fig. 8 is a perspective view of the jar per se which is shown in Fig. 4.

' Fig. 9 is a perspective view of one member of the two-part attachment shown in Fig. 4 and which, except for the omission of a hole through one side thereof, is also a perspective view of the corresponding one member of the two-part attachment shown in Figs. 1, 2, and 7.

Fig. 10 is a side elevational view of the air brush per se from which the normal conical tip has been unscrewed and in place of which aspot- 55 A cylindrical sleeve 29 which is split tudinally -along the slit 30, has knurled flangesting attachment has.been-substituted. 1

2 Fig. 11 is a front end view of the air brush of Fi 10. i

Fig. 12 is a fragmentary View similar to Fig. 10, showing only the front end of the air brush, with the spotting attachment above-referredto removed.

Fig. 13 is a front end view of Fig. 12.

Fig. 14E is a sectional view taken on the line I l-l4 of Fig. 11.

Fig. 15 is a sectional view taken on the line l5l5 of Fig. 14.

Fig. 16 is an enlargement of a fragment of Fig. 7.

Referring in detail to the drawings, the numeral I0 indicates a standard air brush having the usual pivoted trigger l I whose swing is adjustably controlled by the set screw l2 supported in a standard 3. The barrel of the brush is shown at M and the air attachment at l5. As the construction of air brushes is well known, no detailed description thereof will here be given, and the description will be limited to those parts which are essential to an understanding of the instant invention.

Air brushes commonly operate on the injector principle, that is, air is forced transversely past an opening into a liquid container within the barrel so that the liquid and air emerge in astream from the nozzle Hi. When a jar is used to hold the liquid, and this is generally desirable as there is the ever present danger of spilling the liquid when it is contained in an open cup, it is desirable that the jar be made as readily attachable and detachable as possible, and this desirable feature is a characteristic of this invention. The jar I1 is a standard jar but its cap is of novel construction. The cap l8, which is screwed on the jar by means of screw threads, not shown, has a member I9 secured thereon by any suitable means or in any desired manner, as, for example, by means of solder 20. The member I9 is a support in the shape of a strip having its lateral extremities turned up and inward to provide guide rails 2|. A tube 22 is mounted on the cap I8 about an opening through the cap and in alignment with the longitudinal median line of the member [9; an extension or suction tube 23 extends from the tube 22 toward the bottom of the jar. The upper end of the tube 22 is closed by a screw 24, the lower end of which is adapted. I to vary the degree of opening of an outlet 25' into an exit nipple 26, this nipple being rigid with the tube 22. The barrel M has an opening 2! into' the central passage 28 of the brush. I

longi- 3| and 32- at its ends. Secured to, or formed integrally with, the underside of the sleeve 29 adjacent one end thereof, is a slide block 33 having transverse grooves 34 thereby forming flanges 35 at the bottom of the block. It is obvious that the sleeve 29 may be attached to the cap l8 by registering the rails 2| in the grooves 34 and sliding the block on the said member. The sleeve '29 has an opening 36 through one side thereof, receptive of the nipple 25.

In use, the sleeve 29 is first slid over the front end of the barrel M, with the opening 36 thereof on the same side as the opening 21 of the barrel, and when pushed home, these openings are in alignment. The surfaces 38 of the split 31 in the flange 32-, which is a continuation of the slit 30 of the sleeve, are slightly beveled to permit the head of the set screw I2 to ride over these surfaces as the sleeve gets home against the standard I 3. Owing to the obvious slight resiliency of the flange 32, the ends at the split 3! are slightly spread by the screw head and after the head has passed them they retract,

thus providing a means for releasably retaining the sleeve 29 on the brush barrel and thus preventing it from slipping off. With the sleeve 29 thus mounted on the barrel, the jar I1 is secured in place by sliding the block 33 along the member is in the manner described, whence the nipple 26 passes through the aligned openings 35 and 21 so that its open end lies in the barrel passage 28. To provide a frictional holding'engagement of the sleeve and block assembly on the jar cap, the inturned rails 2| may possess a sufficient resiliency, but such frictional engagement may also be provided by tapering the rear portion of the nipple 26 as shown at 26a so that ihe farther the nipple enters the sleeve 29 the tighter is the fit of the nipple in the sleeve.

The same attachment, comprising the same parts with the one exception that the sleeve 29a lacks the hole 36, is shown in Fig. 4 applied to a jar to be used in the manner of an atomizer spray, Ila. Parts in this figure which are equivalent or identical to those previously described, bear the same reference numeral followed .by the letter a, except for the air brush which is in all respects the same as the brush ll! of Fig. l. The cap in this case, shown at 18a, has the atomizer nozzle 39, and the member 19a is positioned at right angles to an imaginary diameter drawn through the axis of this nozzle, instead of longitudinally as in the case of the tube 22 above described. It is apparent that the attachment as applied in Fig. 4 serves the function of enabling the air brush to utilize a spray discharge, which is useful in some phases of air brush work.

In the form shown in Figs. and 6, the sleeve 2%, which is otherwise identical to the sleeve 28a, is fixed to'a support 40 which itself isfixed on the cap 131), substantially as shown. In this case :the air brush I0 is simply attached to or detached irom the jar cap l8b by inserting its forward end into the sleeve 2% until the head of the screw i2 has ridden over the flange 32b. The iar, not shown, to which the cap 1% is attached, also serves as an atomizer, like the jar Ha. It is to be noted that, since the sleeves 2 9a and 29b lack the hole 36, when they are mounted on the barrel of the brush they cover up and close the opening 2.! throu h the barrel.

In Figure 12 is shown the forward end of the brush 49. after the nozzle cap 4| has been unscrewed, and the wall 42 which serves as a baifie to the passage 28, has, a plurality of openings or passages 43 therethrough. A pin 44 is mounted on the barrel l4 at the proper position so that when a friction sleeve 45 having the bayonet slot 46 therein, is pushed home, the sleeve will stop substantially at the position shown in Figs. 10 and 1e. Internally the forward end of this sleeve is of reduced diameter and threaded, shown at 4B, and a cap 41 has its threaded flange 48 engaging the threads 46. This cap has an axial passage 49 to accommodate the brush needle 50, and this passage 49 has a shoulder 5| intermediate the length of the cap so that the passage 49 on the other side of the shoulder is of larger diameter, shown at 52. An extension tube-like flange 53 extends integrally from the cap and surrounds the passage 52. The outer rim of the flange 53 is wis'ened or flanged to give it sufficient area so that, when it registers against the wall 42 as shown in Fig. 14 it blocks the openings 43. By unscrewing the cap 31 these openings are unblocked, and the degree of unscrewing determines the degree of freeing the openings 43 and thus controls the quality and quantity of fluid exiting through the exit from the passage 49. This means permits of a very fine degree of adustment for the operation of spotting with the air brush.

We claim:

1. In combination with an air brush having a barrel and a nozzle at one end of the barrel, and a container having a cap secured thereto, means for releasably attaching said container to said barrel comprising a member secured to said cap and having longitudinal rails thereon, a sleeve slidably mounted on said barrel, a second member secured to the bottom of said sleeve at right angles thereto and having longitudinal grooves therein, said second member being slidably mounted in said first member with said rails registering in said grooves, said cap havin an opening therein and having an upright tube extending from said opening, said tube having a nipple thereon at right angles thereto, said barrel having an opening thereinto from one side thereof, said sleeve having an opening therethrough on th corresponding side thereof registrab-le with said barrel opening, said barrel having a limit stop to the rearward movement of said sleeve on said barrel over said nozzle, said barrel and said sleeve openings being so positioned as to align when said sleeve is slid against said limit stop, the axis of said tube lying in a vertical plane through said first member and equidistant r m sai r ils. ai lee e when mo nt on said barrel being so positioned that said nipple aligns with said barrel opening and said sleeve opening with said nipple registering in said barrel opening and said sleeveopening.

2. The combination set forth in claim 1, having means partly on said barrel and partly on said sleeve for releasably locking said sleeve in said limit stop position.

3. The combination set forth in claim 1, said sleeve having a longitudinal split therethrough thereby providing frictional gripping action against said barrel.

4. The combination set forth in claim 1, said sleeve having a longitudinal split therethrough, said limit stop comprising a radial projection on said barrel in alignment with said split, said sleeve having a flange on that end thereof adjacent said projection, said projection having a setscrew screwed into the forward side thereof and having a head on said screw adapted to ride over the opposed sides of the split in said flange and thereby releasably spread said sides as said sleeve is moved against said projection and to permit said sides of said split flange to return to normal position after said head has ridden thereover whence said head releasably locks said sleeve against forward movement.

5. In combination, an air brush including a barrel and an upstanding pivoted trigger pivoted on an axis at right angles to the axis of the barrel, said barrel having a standard thereon positioned forward of said trigger, a set screw a cap thereon, means for attaching said container on said barrel comprising a sleeve slidably mounted on said barrel and having a longitudinal split in the top thereof lying in the same vertical planeas said set screw, the walls of said split at the rear end of said sleeve being beveled thereby providing a tapering mouth at said rear end of said split, the forward end of said set screw registering frictionally in said mouth upon push- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,166,522 Holton Jan. 4, 1916 1,218,685 Mollenhauer Mar. 13, 1917 1,429,537 Rothermund Sept. 19, 1922 1,604,252 Banfil Oct. 26, 1926 1,743,292 Tittemore Jan. 14, 1930 2,051,518 Cunningham Aug. 18, 1936 2,148,986 Hoyt Feb. 28, 1939 2,256,729 Thompson Sept. 23, 1941 FOREIGN PATENTS Number Country Date 6,264 Great Britain Sept. 6, 1906 145,901 Switzerland June 1, 1931 153,831 Great Britain Nov. 18, 1920

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