. Journal of electricity . t one minute. The maximum radius of the hook is 80 feet andthese cranes have been designed and built for twocapacities, 5 tons and 3 tons, at this radius. Corres-ponding maximum capacities at 40 feet radius are10 tons and 5 tons, respectively. All of the functions of this type of crane areperformed by a single 50-hp. motor through gearsand clutches. The entiie mechanism as shown inthe detail view of the machinery was designed espe-cially for these cranes, which accounts for the ex-treme compactness and ready accessibility. Theentire mechanism of each crane was assemb
. Journal of electricity . t one minute. The maximum radius of the hook is 80 feet andthese cranes have been designed and built for twocapacities, 5 tons and 3 tons, at this radius. Corres-ponding maximum capacities at 40 feet radius are10 tons and 5 tons, respectively. All of the functions of this type of crane areperformed by a single 50-hp. motor through gearsand clutches. The entiie mechanism as shown inthe detail view of the machinery was designed espe-cially for these cranes, which accounts for the ex-treme compactness and ready accessibility. Theentire mechanism of each crane was assembled in theshop so as to insure speedy and pioper erection. Most of the cranes built have been for 440 volts,8-phase, 60-cycle current, although 220 volts direct contact with the trolley wires. The box-shaped armalso serves as a conduit for the wires leading up tothe motor. Heavy split brass collector rings are used withcontroller type fingers to carry the current from thelower to the upper rotating part of the crane. These. Assembled view of machinery showing motor, hoist, rotating frame andixjrtal deck of the electric crane. rings are supported on insulating blocks surroundingthe central king pin castings of the crane. An automatic oil switch with no voltage releaseis used as a part of alternating current equipments,and a carbon break circuit breaker with no voltagerelease is used with direct current cranes. All wiringis placed in iron conduit with approved outlets. - 25% of the orchard fruit of the nation is grown in the West,and 17% of the wheat, with similar records for other foodproducts. The raw materials are here. FORWARD WESTERN INDUSTRY! 270 JOURNAL OF ELECTRICITY [Vol. 45—No. 6 More Power for Western Development
Size: 1794px × 1393px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectricity, bookyear
