Handbook of mechanical and electrical cost data, giving shipping weights, capacities, outputs, and net prices of machines and apparatus, and detailed costs of installation, maintenance, depreciation and operation, together with many principles and data relating to engineering economics (1918)
Gillette, Halbert Powers, 1869-, Dana, Richard Turner, 1876-1928, joint author · New York, McGraw-Hill · leaf 1395
Fig. 37. Average depreciation of standard bucket conveyorshandling fine coal in pivoted buckets; spaced 18 inches. LENGTH OF COMVEVOR- SUM OF VERTICAL AND HORIZONTAL TRA\ EL fH.L> IN ONE DIRECTION IN FEET50 100 ISO 200 250 100 550 400 450 500 S50 600 … Fig. 38. Average depreciation of standard bucket conveyorshandling fine coal in pivoted buckets, spaced 24 inches. in use a reasonable number of hours each year; but in the caseof conveyors with pivoted buckets, such practice is only legitimatewhen the plant is in active operation, at least 60% of…
