US1715986A - Dust gun - Google Patents

Description

E. C. BROWN June 4, 1929.

DUST GUN Filed Sept. 26, 1925 Patented June 4, 1929.

' UNITED STATES 1,715,986 PATIENT OFFICE.

EDWARD C. BROWN, OF ROCHESTER, NEW YORK, ASSIGNOR TO THE E. C. BROWN COM- ]?ANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

DUST GUN.

Application filed September 26, 1925.

My present invention relates to devices for distributing powered substances; such as, are used in applying chemical to plants to prevent their destruction by insects and it has for its object to provide a simple, cheap and convenient form of gun whereby preparations in powdered form may be applied to the plants with the greatest efficiency. The improvements are directed in part toward so assembling the device that a maximum pressure will he developed in the powder chamber and the contents thereof discharged through a restricted orifice under such great pressure and with such force as to drive it eifectively against the plant or other surfaces to be treated. The improvements are further directed toward providing convenient construction whereby the parts of the gun may be easily assembled. To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claim at the end of the specification.

In the drawings:

Figure 1 is a side view of a dust gun, constructed in accordance with and illustrating one embodimentof my invention.

Figure 2 is an enlarged fragmentary, longitudinal, sectional View through the dust chamber and discharge tube.

Figure 3 is a transverse section on the line 33 of Figure 2.

Figure 4 is a perspective view of one of the heads of the dust chamber and Figure 5 is a fragmentary, sectional View of a modified form of nozzle.

Similar reference numerals throughout the several views indicate the same parts.

In the construction and operation of a 7 dust gun it is important that a considerable pressure of air be developed suddenly in the dust chamber so that the material will be projected with a sudden force that will carry it in concentrated form onto and under the leaves of a plant that, for instance, the gun is used to treat. Furthermore it is desirable that the gun be cheaply and lightly con structed and have the capability of being readily taken apart to be cleaned or refilled.

WVith these objects in view I have designed a gun which comprises three major parts; namely, a pump or compression cylinder 1; a dust chamber or cylinder 2 and 'ure 4.

Serial No. 58,798.

a delivering tube 3 that is capped by a nozzle 4-. The pump cylinder 1 is provided with a piston '2 connected by a stem 3" with a handle 4 all of which parts operate in the usual manner of a pump, a suitably packed head 5 being provided through which. the stem 3" projects.

The pump cylinder 1 is rigidly attached to a head (3 which has a tight joint with the rear end of the powder container or cylinder tube. In this head is a port 7 leading into a cage 8 secured to the forward side of the head in the interior of the dust chamber; The cage 8 is further provided with a port 9 that discharges into the chamber. cage 8 with the ports 7 and 9 form a conduit from the pump to the interior of the chamher, the discharge port of which projects a jet radially of the chamber and against the body of dust contained therein. The port 7 is normally closed by a valve 10 held in place by a spring 11 located within the cage. Then the piston 2 is driven inwardly or forwardly it creates a sudden pressure in the pump cylinder 1 that is communicated through ports 7 and 9 to the dust chamher 2, the valve 10 and its spring 11 yielding momentarily under the superior force.

At the far or forward end of the dust chamber 2 is a similar head 12 also having a tight connection with the dust cylinder the same being shown in detail in Fig- It is provided with a forwardly projecting tapered collar 13 opposite to or in alinenient with a discharge port 14 in the head 12. The discharge port is covered by a gauze screen 15 which prevents any lumps in the powder (the body of which is indicated at 16, Figure 2) from reaching the discharge port 14.

The delivering tube 3 fits upon the collar 13 which, as before stated, is tapered, and provides another slip joint at this point whereby the tube 3 may be easily detached from the head 12 and the head 12 may be easily detached from the powder cylinder 2. The nozzle 1 of the delivery tube 3 is in the nature of a cap piece jammed over the end thereof and is preferably formed as shown in Figures 1 and 2 with a discharge orifice 17 in its side or top whereby a cone shaped delivery of the powder is projected upwardly and is adapted to effectively impinge upon the under side of a plant leaf where insects are accustomed to accumulate. In some The instances, however, it may be found desirable and effective to have the nozzle formed as shown at 4: in'Figure 5 wherein it is provided With a central discharge opening 17 but the tube 3 is given an upward curve 18 at its head to furnish same effect.

The port 14 and the discharge opening 17 are preferably of about the same size and capacity as Well as the port 9 in the cage 8 although port 7 may be larger. This equalizes the pressure in the dust chamber 2 and provides a flow through the discharge tube 3 that gives a Well mixed and forceful cone of dust in the air issuing from the discharge orifice 17.

A dust gun constructed in accordance with my invention may be readily made of light sheet metal parts and easily assembled while at the same time the interior parts are always accessible for cleaning or for re-filling the dust chamber tube and by detaching the discharge tube 3 the device may be shipped in a knocked down condition to occupy small space in a container and yet enable unskilled persons to assemble it upon its receipt.

I claim as my invention:

A spray gun comprising a cylindrical container having inner and outer end. Walls thereon a cylinder extending longitudinally of the container and having one end thereof connected with and closed by said inner Wall the latter having a discharge port for the passage of air from the cylinder to the container, said port being located off center With respect to the head, valve means carried by the inner Wall for controlling the passage of air through said port and for directing it laterally toward the center of the container, a removable closure upon the outer Wall having a dust discharge passage, a tubular member projecting forwardly from the closure in communication With said passage and a nozzle pipe detachably secured upon said tubular member.

EDWVARD 0. BROWN.

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