. The Bell System technical journal . Fig. 15—Concrete Mixer on Ford One-Ton Truck. Maximum Portability for Small Jobs. Fig. 16—Light Weight Trenching Machine. USE OF LABOR-SAVING APPARATUS 69 can be used behind the Ford truck to transport the supplies and toolsnecessary in connection with isolated jobs. Trenching Machines Where it is necessary to do a considerable amount of trenching forunderground conduit in outlying districts, it is sometimes possible toutilize a trenching machine with marked economy. In fact undernormal conditions a machine of this kind will dig trench about as fastas a ga
. The Bell System technical journal . Fig. 15—Concrete Mixer on Ford One-Ton Truck. Maximum Portability for Small Jobs. Fig. 16—Light Weight Trenching Machine. USE OF LABOR-SAVING APPARATUS 69 can be used behind the Ford truck to transport the supplies and toolsnecessary in connection with isolated jobs. Trenching Machines Where it is necessary to do a considerable amount of trenching forunderground conduit in outlying districts, it is sometimes possible toutilize a trenching machine with marked economy. In fact undernormal conditions a machine of this kind will dig trench about as fastas a gang of 50 men. The machine shown in Fig. 16 is a recent development which hasadvantages over the older type units in that the size and weight aresuch as to admit of its being transported from point to point on aheavy truck or trailer. Pumps In handling the water from excavations and also from manholeswhere splicers are working, the diaphragm pump illustrated in Fig. 17is giving a good account of itself, particularly because of certainfeatures incorporated in the design which especially adapt it to tele-phone cond
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
