Popular Science Monthhf 



327 





r^^i:^ 



^"j'- 



^.MiM 



How the Stone and Old Concrete Were Removed 

 from the Basin by the Improved Cableway 



A Substantial Cableway Built from 

 Scrap Material 



IX rcmo\ing a quantity of stone and 

 old concrete from the interior of a 

 fifteen-million-gallon reserv'oir under con- 

 struction in Omaha, Nebraska, the cable- 

 way illustrated was built from scrap 

 material in a short time by the black- 

 smith on the job. 



The "A" frame was built with an old 

 lO-in. sheave at the top, over which 

 passed the carrying cable. This was a 

 piece of ordinary galvanized strand such 

 as is used for guy wire, and the hoisting 

 line was ^4-in. manilla rope. The carrier 

 was built of 5s-''i- '^V i i^-in. flat iron, 

 using sheaves from old pulley blocks for 

 the running and hoisting sheaves. The 

 movable block, to which was attached 

 the hook for suspending the load, was an 

 8-in. block with a long pin through the 

 sheave to engage the stop on the carrier 

 when the tackle was at "two-block." 

 The wheel-barrows were attached by a 

 three-chain grab. 



With the cableway in operation, the 

 wheel-barrows were loaded inside the 

 basin, wheeled under the lower stop of 

 the cableway and the grab chain at- 

 tached. The load was raised by a 

 hoisting line to the "two-block" posi- 



Releasin-; tbe Hoistin'; Line at the "Two- 

 Block" Position Lowered the Wheel-Barrow 



tion, and then hauled up on the carrier 

 line. Upon reaching the head frame the 

 long hook was dropped to engage a pin 

 in the top member of the carrier. When 

 the hoisting line was released the wheel- 

 barrow was lowered to the ground. The 

 grab chains were released and the load 

 wheeled to the dump. An empty wheel- 

 barrow was then attached, hoisted to the 

 carrier, the hook released and the load 

 sent to the floor of the basin. On this 

 work a small hoisting engine was used. 



