1911.1 PUBLIC DOCUMENT — x\o. 31. 01) 



A NEW TYPE OF SPRAY NOZZLE. 



BY G. E. STONE. 



For some years the Avriter has given considerable attention to 

 the iniproA'enieut of nozzles, and has experimented with various 

 types. In a preceding article on the spraying of trees we have 

 already referred to the importance of nozzles being adapted to 

 specific cases, and from time to time we have sketched and had 

 constructed in a simple way new types of nozzles, which have 

 been tested. The principles involved in these nozzles were in 

 many cases new, but when the nozzles were constructed and tried 

 out, some of them, as might be expected, were more or less fail- 

 ures. Various methods and devices were used and tested to 

 break up the spray, and in one case a rotary wheel of a turbine 

 type was tried. 



Without going into a detailed description of the various types 

 of nozzles which we have worked upon we will confine our atten- 

 tion to one of these which has proved to be remarkably satisfac- 

 tory in spraying large trees from a high-pressure machine. This 

 nozzle is shown in Fig. 1, at A. It consists of a nozzle screwed 

 tightly onto the tip of a standard attachment provided with shut- 

 off, such as is often employed in spraying work (see B). The 

 attachment, however, is incidental, as it may be fitted to -any 

 suitable metal connection threaded to fit, and provided with a 

 hose connection at the lower end. The essential part of the 

 nozzle, as shown at .1, consists of a small brass tip, t, about iVj 

 inches long, provided with an aperture at the end Vs of an inch 

 in diameter, although sometimes an aperture of ■>-?2 or /4o of an 

 inch in diameter has been employed. About an inch or more 

 above the center of the aperture there is placed a solid brass rod, 



c, 1/4 of an inch in diameter. This is attached to another rod, 



d, by means of a thin sheet of brass; the rod, d, works in a 

 socket, and allows the pointed brass rod, A, to be throAvn in or 



