Spraying Devices and Machinery. 187 



machines were exhibited at a fair held in Montpellier, France, 

 during February, 1886, and a great number were manufactured 

 and sold within the next few years. Hand or barrel pumps 

 were rarely used. The most popular knapsack pumps now 

 made in France are the Eclair, the Vigouroux, the Japy, and 

 the Albrand. The first (Fig. 6) is manufactured by Vermorel, 

 Villefranche (Rhone). It is made without a piston, the liquid 

 being propelled by means of a circular rubber disk B which is 

 fastened at the edges, 

 but moves up and 

 down in the center, 

 thus forcing on the 

 liquid contained be- 

 tween the disk and the 

 bottom of the tank, C. 

 The liquid in the reser- 

 voir, R, flows through 

 the valve, L, entering 

 the space above the 

 disk. When the latter 

 is forced upward by 

 the action of the han- 

 dle, K, the fluid is 

 forced through a sec- 

 ond valve, V, into a 

 second receptacle, 

 which serves as an air ^ 

 chamber, D. From ^ 

 here it passes through 

 the orifice, H, and is 

 discharged at the end 

 of a hose provided for the purpose. When the center of the 

 disk is lowered, more fluid is drawn in from the reservoir, and 

 in this manner the pumping is performed. 



The Vigouroux pump contains an air chamber and piston 

 pump within the tank. The piston is moved by means of a rod 

 which ascends through the top of the tank, and, after turning 

 sharply, descends on the outside to below the tank, where it is 

 attached to the lever w T hich serves as a handle. Another form, 

 one which is provided with a second pump for filling the tank 



FIG. 6. The "ficlair" knapsack pump. 



