US1234378A - Air-brush. - Google Patents

Description

c. H. PARKIN.

AIR BRUSH..

APPLICATION FILED NOV. 29. 1915.

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Application filed November 29, 1915.

To all lwhom it may concern:

Beit known that l, CHARLES H. PARKIN, a citizen of the United States, residing at Cleveland, in the county ofuyahoga and State of Ohio, have invented certain new and useful lmprovements in Air-Brushes; and I do hereby declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

rfhis invention relates to so-called air brushes of the type designed so as to be adapted for coating surfaces withr varnishes,

'15 paint or other liquid pigment.

The object of this invention is to provide an air brush of the type set forth which in its action and operation does not atomize the varnish; paint or liquid pigment but ap v plies it in the same manner as it is applied by the ordinary brush excepting that air o under pressure is utilized and no bristles or other rubbing material are employed.

Heretofore and before this invention air brushes have been employed for \the purpose of applying varnishes', paints and other liquid pigments to surfaces but the spraying and hence the atomizing process has been employed, this atomizing by air of the varnishes, some of the paints and liquid pigments has an objectionable action on the same causing the varnishes or paints to be' applied in an open, brokenl and pervious manner, as opposed to the application when applied in its unatomized condition and hence the atomizing process is objectionable in theA use of certain types of varnishes,

" enamel paints and the like and tends to leave j the surface open and porous and fiat.

'40 rlhis invention avoids the above objectionable features inasmuch as it eliminates the atomizing of the varnishes, paints and other liquid pigments but nevertheless applies the same to the surface in a thin even film condition and subsequently smooths Y. and evens the same by air pressure thus applying the surface coating material in the same manner and with the same effect as though it were applied and rubbed in by a 5o paint brush of the ordinary type.

With the above objects in view )this invention consists in the means employed and the detail of construction all of which will be hereinafter fully set forth and claimed.

ln the drawings, Figure l, is a vertical sec- Specication of Letters Patent.V

A i arras narrar rufen.

LES E. PARKIN, OF CLEVELAND, OHIU.

Patented duly 24, llli.,

Serial No. 63,959.

tional view of a device constructed accordfing to this invention embodying practical operative details of construction for the carrying out of this invention.

Figs. llt and Ulf, illustrate more clearly the ports through which the air passes, .and

Fig. lV illustrates a top plan View of the invention showing the spider frame, spreader, dedector, air space surrounding the saigie and the outer flaring cup from the air tu' e. y

lfn the device illustrated l represents an inner tube of small bore through which the coatingmaterialA is fed by pressure. At the upper end of the tube 1 the bore is reduced 70 preferably by providing a removable tip 2 having a suitable sized orifice 3 through which the coating material issues. rlhe tip 2 is preferably surfaced hat or plane and is provided just above it with a globularor ball shaped spreader 4, the same .operating loosely between suitable guides 5. The guides 5 depend from and are suspended by a'suitable spider frame 6 which may be aty tached to the Haring mouth 9 of the inner S0 tube hereinafter described.' Mounted above the spreader 4 is an adjusting screw 7 having a nut lock 8 for the purpose of adjusting the spreader 4 in relation to the orice 3 thus gaging the flow of coating material 85 i as may be desired or found necessary.

Located at the upper end of the inner tube l is an upwardly and outwardly flaring mouth or deector 9. In the present case this is illustrated as having a. curved inner wall although it may be found practical to employ a .straight wall thus giving the fiar: ing mouth the shape ofan inverted truncated cone. The object of this flaring deflector is to cause the coating material to be guided by the inner walls ofthe dedector 9 into practically a continuous flaring lm gaged in thickness by the adjustment of the vspreader 4 as it issues fromithe orifice 3.

From the above it will be Seen that the coat 100 ing material issues from the device in its normal unsprayed and undivided conditionl and in such quantities and condition as to be applied in a continuous unbroken :film on the surface.

ln order to sustain the coating material as it issues from the device and also for the purpose of coacting with the coating material during its application a thin film of air issues from an annular orice 10 at the upper 110 end of the flaring mouth piece 9. This annular orifice is so located and adjustable that it will allow a film or air to issue therefrom under pressure which completely surrounds, envelops and` confines the coatlng material, `and acts, as the coating material is applied, to irst clean the surface from dust or loose particles and to then smooth and press the coating material to thesurface.

The construction as `is v.illustrated in the drawingfor supplying this air pressure is to vided with an ordinary valve, (not shown).

` The annular space 13 communicates with ports 15, 15 and with a chamber 16,- said chamber 16 being provided with a flaring mouth 11 so constructed as to be adjustable in relation to the upper portion of the liaring deflector 9; and being located exterior of said deflector 9 its adjustment may be accomplished by moving it up or down on the J outer casing 12 by means of screw threads 17.

When adjusted to the proper sized opening for the air it is nally locked in set position b v a 4locking bur or nut 18 which is surfaced in relation to the bottom of the adjustable portion' so that the annular opening through which the air issues will 4be practically the same around the entire circle.

In Figs. II and III I have illustrated more clearly the ports 15 through the screw threaded portion 19 which connects the inner tube with the outer tube at the upper portion. It is rpreferred to form the deflector 9 so that it may be removed for cleaning pursirable that the air issue in greater volume than the coating material.

In setting forth this .invention a means has been set forth and described for carrying out all the objects lin the best manner present time known bbut it is not desired to restrict this invention to the meansshown and Yset forth or to the details of construction embodied therein.

Having thus set forth my invention as it appears at the present time to be best adapted, what I wish to claim is:

r1. An air brush of the type set forth comprising means operable to discharge a film of surface coating material, an air or Huid pressure discharge surrounding said coating material outlet and adapted to envelop and confine said coating material, with means for adjusting or ,lgaging said discharge of the surface coating material, and means for adjusting the air or fluid discharge opening.

I 2. An air brush of theitype set forth com-j ftube provided with a spreader for spreadposes as illustrated at 20 by means of male and female screw threads, this also allows -for the removal of the spreader 4.

It is of course understood that the device isl secured to a suitable handle which is formed hollow and attached to the coupling 21 which is packed and communicates with the inner coating material tube' 1. The coating material passes from a pressure tank `through hose and a handle to the inner tube; the pressure being maintained so as to properly eject the coating material from the oriice 3 according to the material employed and to the force necessary to carry the material andproject it in proper form against the surface to be coated.

A coupling 22 is provided for coupling the air hose which is flexible and which leads from an air pressure means, where pressure ing the coating material and hence it is deing the surface coating material into an unbroken ilm and said latter tube adapted to allow the air issuing therefrom to force said lm of surface coatingl material into the surface thus coated.

4. An airbrush of the type set forth comprising a tube for the issuing of a'surface coating material( in combination with a tube l CHARLES H. PARKIN.

Witnesses:

JOHN J. DONNELLY, f ALBERT B. DONNELLY. v

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