PISTONED BLOWERS. 249 



horse or otherwise. The chamber, /?, communicates with the main blast 

 by the pressure-tube, x-y^ and the poison-passage. When desired, this 

 aperture has an adjustable shut-off to regulate or stop the flow therefrom. 

 The handle has an incurrent air- valve. 



Either of these apparatuses may have, instead of a single jet, two or 

 more jets on i^ipe- branches, and thus were made compound machines 

 involving the same principles. The systems of branching tubes [PI. 

 XLIX and XL VI] and the conveyances in these machines combine also 

 with others, and also the liquid-feeding reservoir made on the plan just 

 described may be substituted in place of the powder-can in the appara- 

 tuses presented above and in Plate XX XIII. 



On the other hand, in making very simple atomizers on the above 

 plans the extension-pipe, ?', may be omitted, and the spray-nozzle can be 

 formed as a comi^artment of the reservoir, or be attached thereto by a 

 short neck. 



*'A portable spray machine (Plate XXX, Fig. 4) was made a few years 

 since by Mr. W. P. Peck, of West Grove, Pa., consisting of a tank 

 strapped knapsack-fashion on the shoulders, and connected by rubber 

 tubes with a pair of bellows, buckled to the waist, turned by a crank, 

 and connected with a movable nozzle. The tank holds three gallons, 

 and there is a simple device at the bottom, which, by the motion of 

 walking, keeps the liquid in agitaaon and prevents the poison from 

 settling. The liquid issues in a fine spray and with considerable 

 force." 



^ Mr= W. Y. Wallace, of Boston, Mass., patented in 1876 (Xo. 185803) 

 an elastic bulb, discharging a blast in the spout of a watering-pot to 

 blow a spray therefrom, which seems to cover the spraying princiijle of 

 the Peck machine. 



RECIPROOATmG OR PISTONED BLOWERS. 



[Plate XXXV.] 



(a, for powder ; h^for liquid.] 



The piston-pumps in Plate XXXY, Figs. 1 and 2, and described 

 below, or other air-pumps, may answer as blast producers for blow- 

 ing powder or fumes, and for atomizing liquids. For these purposes 

 the cyhnder of the pump should be preferably larger than when it is 

 to be used only for compression. With such blast generators powder 

 feeders or atomizers of the kind already described for use with bellows 

 can be combined with or without distributing pipes and nozzles as de- 

 sired for simple or compound machines. Those same appurtenances 

 were planned for blowers of any kind, but the air-pump shown in Plate 

 XXXV, Fig. 1, was invented and used by myself in such combination 

 and subserves the purposes very well. The pum}) discharges through 

 its hollow piston-rod, and this is easily coupled to the blast-pipe of the 

 feeding and distributing apparatus. 



