US2341036A - Spraying apparatus - Google Patents

Description

Feb. s, v1944. F. w. GUIBERT 2,341,036

SPRAYING APPARATUS Filed sept. 5, 1940 INVEN To K l/74//5/5 W Q//// ATTO KN EY Patented Feb. 8, 1944 UNITEDY STATES PATENT ori-ica SPBAYING APPARATUS Francia W. Guibert, Beverly Hilll, Calif.

Application September 3, 1940, Serial No. 355,146

(CI. 9h45) 3 Claims.

This invention relates to apparatus for spraying dry materials onto a surface to which they adhere, for producing decorative effects. Such materials may be mica, or other mineral matter, as color, silica, or the like. The surface is usually formed by'a fresh coat of paint, or other sticky material.

Apparatus to spray such materials has heretofore been heavy and not readily portable, due to the fact that the pressure for producing the spray was applied to the container. Further, such an arrangement requires that that closure for the charging opening of the container must be securely fastened. Thus the supply of material in the container can not be easily renewed.

It is an object of this invention to provide spraying apparatus for such work which is light and easily manipulated.

It is another object of this invention to provide such apparatus wherein the need for securely fastening the closure to the container is eliminated, thus making the relling of the container a simple matter.

It is still another object of this invention tn provide a spraying apparatus wherein it is optionally possible to prevent the air blast from carrying material out of the container; that` is, to make possible the use of the air blast for removing undesired material from the surface being operated upon.

In using such apparatus with some materials, the materials have a tendency to pack or arch adjacent the outlet of the container, thus preventing their proper discharge; and this is especially true with mica flakes, or other light materials.

It is a still further object of this invention to provide spraying apparatus having a novel means for agitating the material to prevent such packing.

This invention possesses many other advan-l tages, and has other objects which may be made more easily apparent from a consideration of several embodiments of the invention. For this purpose there are shown a few forms in the drawing accompanying and forming part of the present specification. These forms will now be described in detail, illustrating the general principles of the invention; but it is to be understood that this detailed description is not to be taken in a limiting sense, since the scope of the invention is best dened by the appended claims.

In the drawing:

Figure 1 is a perspective view showing the spraying apparatus;

Fig. 2 is a transverse axial section of the apparatus of Fig. 1 on an enlarged scale;

Fig. 3 is a cross section as seen on plane 3-2 of Fig. 2; and

Fig. 4 is a fragmentary side elevation showing a modified form of the invention.

In the present form of the invention, the device incorporates a container' I of light sheet metal, and which may be cylindrical. It is provided with a cover 2 which is not necessarily air tight and is merely held in place by a depending lip 3, so as to be easily removable and permit loading of the container with mica or other decorative material which it is intended to distribute by the apparatus. For ready manipulation, the container I may be provided with a handle structure 5, mounted on the container by brackets 8 and 1.

To permit the device to be suspended from any appropriate support, such for example as a rung or the ladder on which the operator may be standing, a. hook member 8 is secured to the container i adjacent the upper edge of the container.

Adjacent the lower edge of container l, substantially diametrically opposite to handle 5, is a discharge nozzle I0, Nozzle III is of rectangular cross section, having a relatively long and narrow outlet. The walls of the nozzle are inclined, so that adjacent the container the nozzle is narrower. The nozzle I0 communicates freely with the interior of the container through an opening II.

An air blast is used for drawing the material from container I into the nozzle I0 andthen discharging it from the nozzle. To form this air blast, a pair of jets l2 and I3 are provided. Pipes Il and I5, forming these jets extend across the lower portion of the container, and enter nozzle Il on opposite sides of opening Il. Pipes Il and I5 converge towards the nozzle so that the streams .of air discharged by jets I2 and I3 meet within the nozzle. This produces a very eiective suction within the nozzle as well as causing the discharged material to be uniformly distributed through the nozzle oriiice and to be discharged with a uniform velocity. As the air blasts from openings I2 and I3 meet at the base of nozzle I0, there is a tendency for the air to be directed transversely against the top and bottom walls of the nozzle Ill. However, these walls serve eifectively to coniine the air stream in a general horizontal direction and to change the course of the air in alinement with the nozzle opening.

The ends of pipes i4, I5 within container I are joined by a T iltting I6, the branch Il of which is connected to an extension i8 of control valve I8. Valve I9 is of that general type wherein a spring pressed closure member 20 serves to prevent passage of air through a ported seat 2|, an operating stem 22 extending out of the valve and terminating in a thumb button 23. Such valves are commonly known as blow-gun" valves.

Valve Il is located directly beneath handle 5,

which is made hollow to accommodate an operating rod 24 engaging thumb button 23. Rod 2| has a similar thumb button 25 at its upper end. The handle 5 may be grasped by the fingers of one hand. the thumb being used to operate the valve I9. Thus, the device may be manipulated by one hand, leaving the operators other hand free. A ilexible hose 28 or suitable length serves to connect valve I9 with an appropriate source of compressed air An important ieatureof the apparatus is that the container I is never subjected to the air pressure used for discharging the material 28 placed in the bottom of the container I. Thus the container-can be made of light material, so that it can be conveniently handled. Further, this obviates the need of cover 2 being secured in an air tight manner. It merely rests on the top of the container and is readily removable when the container is to be refilled. A chain 30 is provided to prevent the cover 2 being separated from the container I and possibly lost.

To permit air to enter the container I in response to the ejector action of jets I2 and I3 in nozzle I0, a plurality of small openings or ports 21 are provided in the wall of the container I near its bottom. These obviate any danger of the container I collapsing due to creation of a vacuum therein.

Further, some of the materials which the apparatus is to be used with, for instance mica, have a tendency to pack around the outlet. The air entering through ports 21 serves eiectively to agitate the material 28 and prevent any packing or bridging, thus ensuring a free discharge into the nozzle in response to the suction therein.

It may be desired at times to provide an air blast, which carries no material. as for instance when it is desired to remove an excess of deposited material from a surface. This can readily be done by providing a small valve 3|, which optionally serves to place the interior of the nozzle I in communication with the surrounding air. Thus if valve 3| is open, the air blast from jets l2, I3 will merely draw air through valve 3| and discharge it, instead of drawing material through opening II from the container I. This valve may also be used to control the amount of material which a blast of given strength will carry. since by partially opening it, the suction on opening I I will be reduced.

As shown, the nozzle oriilce extends in a direction perpendicular to theaxis of the container, that is. in a horizontal direction when the spray j is in use.

It may be desirable to have the nozzle opening extend in some other direction. This can be readily done. Thus, as shown in Fig. 4. the nozzle opening is parallel with the container axis, so that the opening extends in an approximately vertical direction when the apparatus is in use.

What is claimed is:

1. In a device of the character described, a container, a discharge nozzle, a gaseous ejector jet in said nozzle, means to connect the nozzle to the container to draw material from the container and discharge it from the nozzle, control means for said jet, means for continuously maintaining the container at substantially atmospheric pressure, and means for admitting air at atmospheric pressure to said nozzle to reduce the suction of said jet.

2. In a device for discharging divided material, a container forming a space for the accommodation of the material, an ejector including a discharge nozzle having a passage with a restricted discharge opening, means forming a pair of con- .30 verging air jets in said nozzle, means forming an opening of ilxed size between the container and the nozzle, means controlling said jets, means regulating the suction produced by the jets in the nozzle, said last mentioned means acting independently of the means controlling the jets, and I means to admit air at atmospheric pressure freely to the space in the container adjacent the nozzle.

3. In a device of the character described, a container open to atmospheric pressure, an air opero ated discharge nozzle in one side of the container, a handle opposite the nozzle for supporting the container, said nozzle and said handle being integral with the container, a valve for controlling admission of air to said nozzle, and operating means for the valve extending through the handle.

i FRANCIS W. GUIBERT.

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