US1547349A

US1547349A - Nozzle for air brushes

Info

Publication number: US1547349A
Application number: US642951A
Authority: US
Inventors: Carl L Reichenbach
Original assignee: HOWARD W BEACH
Current assignee: HOWARD W BEACH
Priority date: 1923-06-02
Filing date: 1923-06-02
Publication date: 1925-07-28
Anticipated expiration: 1942-07-28

Description

July 28, 1925. 1,547,349 c. L. REICHENBACH NOZZLE FoR AIR BRUSHES Riledgqne 2. 1925 INVENToR Patented July. 2s, 1925,

UNITED STATES' PATENT o-FFICE.

.CARL I.. REICEENBACH, or YoNxEns, NEW Yonx, -AssrGNon ronownan w, BEACH, `4or NEWARK, NEwJnnsnY.

NOZZLE 10B AIB BRUSHES.

appunti@ mea :une 2, 1923. serialv No. 842,951.

To all fwlom t myconcem:

Be it known that I, CARL L, REICHENBACH, a citizen of the United States, and a resident of Yonkers, county of Westchester, and 5 State of New York, have invented certain new andv Iuseful Improvements in Nozzles for Air Brushes, of which the following is a specification. l i This invention relates to an improved nozzle for air brushes, which nozzle is constructed to more eiiciently and economically' apply a coating of paint and other liquids or semi-liquids, and to produce a more even and smooth. application or coat on the surface treated. The invention is-particularly adapted for applying heavy materials and viscous materials with a comparatively low` air pressure at the nozzle, and for applying lighter materials with a relatively low air pressure.

The invention is illustrated in the accom- ,panying drawing', in which .Figure 1 is a side view ofan air brush with a part thereofv shown in section to indicate the attachment 2? of the parts of the nozzle. Figure 2 is an enlarged section of the nozzle shown in Figure 1. v Figures 3 and 4 are similar views of modified forms of nozzles,fand Figure 5 is a similar view of -a further modification, and4 Figure is a front view of the inner member of Figure 5.

.The nozzle is applicable to any of thev 'types of air brushes, but Ishow it a plied to a brush of the 'type shown inlllnited States Patent No. 1,430,533, dated ``Oct. 3, 1922.

The brush is shown lat 10, and the body portionJ has a passage or duct 11, through which air under pressure 'is conducted to the 4 -front-.of the bru'sh, and a passage12 is ar ranged for theow of the' paint, varnish or other material that is being applied.

The nozzle is formed of two members, one the innery member 13 which is secured in place usually by screwing the part 14 into the en d ofthe barrel of the brush, thus placing the bore in' register with thepassage v12. `Surrounding the inner member, and- .`spac'edftherefrom, is the outer member 16 52 which is usually fastened lby the screwthreaded portion 1 7 fitting over'the screwthreaded end of the barrel of the brush` and' being thus not only held in place, but being adjustable relative to the inner member, and,

when 1ad]usted, the outer member is locked by the lock nut 18.

` The inner wall 19 of the outer member is tapered, and since the nozzles are usually 'rounded it forms a cone-shaped interior, at

the small end of which is arran ed the outlet 20 which is substantially in line with the bore 15 .of the inner member. The outer wall or face 20 of the inner member is also tapered, but ata less angle to the longitudinal axis of the nozzle than the wall 19, so

that these walls conver e, forming a more restricted passage as t e outlet 20 is approached. p

This" structure is of decided advantage over those in .which the walls of the inner and outer members are parallel, or in which 'the airis subjected to a quick change in direction, in that it eliminates the back pressure to a greatv extent and increases the velocity where the air passes the outlet of the inner member and picks up the material to be appliedto atomizers, this velocity in the air being supplied without increased pressure, so 'that a brush supplied with this nozzle finely vaporizes and forms into a mist materialv which, with the other types of nozzle, requires a very high pressure of air, and

does it with a relatively low pressure.

If the material is to be given a rotary movement while it is leaving and after it leaves the nozzle, I may give-the air a helical path of travel by placing a helical element, such as the rib 21, on the outer member, shown in Figure 3, or the rib 22 on the' inner member, which is shown in Fi re 4. Furthermore,a more concentrated e ect for such `rota-ry stream canbe provided for by placing the short extension or boss 23 on the outlet end of the outer member, as will beseen inFigure 3, or if it is to be given a greater spread the face of the outer member can be made blunt, as shown at24 in Figure 4.

In Figures 5 and 6 I show a still further modified form in which .the outer member is provided with blades 25 which are arranged at an angle, as shown in Figure 6,

'and `are held so that they press against the inner member and are seated in the outer member,`such pressing being caused b small leaf springs 26 which can be inse in the shell 27 on the outer member.

The amount of air that comes through and is ejected from the nozzle can be Vre lated by the usualvalve in apparatus of this kind, and also hy regulating the outer member relative to the inner member, as will ben evident.. Y

l claim:

A nozzle for air brushes comprising an outer member with a tapered inner wall and `With an outlet at its small end, an inner member spaced from the outer member and having its outside wall tapered at an angle less than that of the Wall of the 'outer member relative to the longitudinal axis of the nozzle, and having an outlet at its small end,

and a spiral rib on the outer face of the" inner member to project into said space and October, '1922.

Y C. L; REICHENBACH.