USE OF LABOR-SAVING APPARATUS 



67 



in several respects to meet the particular requirements of telephone 

 construction work. 



Units of this type which are now in service are operating very 

 satisfactorily, both from the viewpoint of reliability and adaptability 

 to the work. This outfit will mix as much concerte as ten men and 

 will do it much better. 



Fig. 14 — Pouring Concrete Manhole. Note 4-way Chute for Distribution 



Fig. 14 shows one of the batch mixers in service pouring a concrete 

 manhole, the concrete being uniformly distributed to all sides of the 

 structure by means of a four-way chute. In connection with the 

 broadening use of concrete manholes it might be mentioned that the 

 availability of improved compressed air tools has greatly simplified 

 and cheapened the making of any changes that may be required 

 subsequent to the initial construction of the manholes. 



In order to provide a concrete mixer unit having maximum port- 

 ability and having proper capacity and operating features for tele- 

 phone work, we have cooperated with the manufacturer in the devel- 

 opment of such a unit which is shown in Fig. 15. This consists of a 

 batch mixer permanently mounted upon a Ford 1-ton truck chassis 

 and operated through a suitable power take-off from the Ford engine. 

 This unit loads from the ground by means of a power loader and dis- 

 tributes the concrete from the opposite side of the drum through a 

 long swinging adjustable chute (not shown). A small trailer if desired 



