230 ANNUAL REPORT 
“Passing through the drum and supported upon the truck is a fold- 
ing chute which receives the conerete from the drum and delivers it to the 
wheelbarrow or other receptacle used for conveying the concrete away.” 
Inside of one minute the material has all been turned over thirty 
or forty times and is well mixed. This mixer will mix 200 to 400 
Fig. 130.—Ransome Drum Mixer, Charging. 
charges a day.” Ransome claims to be able to mix concrete at a cost of 2 
cents per cubic yard. ; 
Smith Mixer.—-The Smith concrete mixer consists of a revolving 
drum or doubie cone with horizontal axis, constructed with deflecting 
wings on the inside. The end of each cone is open, one serving as the 
loading end, the other for the discharge end. The concrete is visible 
during the entire period of mixing and can be discharged without stopping 
the machine. The thoroughness of the mixing depends upon the time 
spent or the number of revolutions given. Whenever the writer has seen 
the machine in operation it has been turning out an excellent product. 
Figure 132 shows the discharge end view of the Smith machine. 
No. 0 No. 1 No. 2 No. 24% No. 4 No. 5 
Standard charge, cubic 
feet kon Nera oss 5 9 13146 16 21 28 
Extreme capacity, cubic 
GObivis Vey pence ere. 6 12 17 21 23 35 
Cubic yards mixed per 
lokoywbes (YO) WO). goooea an 5 10 16 20 22 35 
Horse power required... 3 6 8 10 14 18 
Weight on skids with 
pulleyonly,inpounds 1,600 2,500 3,800 4,500 5,570° ~~ ~=—'7,300 
