. Electrical world. ket line; oneiS-hp motor, with controller and resistance for operating the winches(this apparatus is for working the head lines and changing the direc-tion of the boat to suit the work) ; one 40-hp motor, direct-connectedto a centrifugal pump (this pump furnishes water for washing thesoil) ; one 15-hp motor to drive the stacker or conveying belt which S8o ELECTRICAL WORLD and ENGINEER. Vol. XLIII, No. 12. disposes of the stones; one 15-hp motor lor operating the shakingscreens; one 30-hp motor for operating the sand pump (this motoris worked occasionally when the sand accum
. Electrical world. ket line; oneiS-hp motor, with controller and resistance for operating the winches(this apparatus is for working the head lines and changing the direc-tion of the boat to suit the work) ; one 40-hp motor, direct-connectedto a centrifugal pump (this pump furnishes water for washing thesoil) ; one 15-hp motor to drive the stacker or conveying belt which S8o ELECTRICAL WORLD and ENGINEER. Vol. XLIII, No. 12. disposes of the stones; one 15-hp motor lor operating the shakingscreens; one 30-hp motor for operating the sand pump (this motoris worked occasionally when the sand accumulates too thickly at theback of the boat, and delivers it out on the rock pile through a longpipe) ; one 3-hp motor for operating a deck and bilge pump, usedfor general washing purposes. The buckets each carry 3 cubic feetof earth. A similar equipment of the chain bucket type is furnishedthe Butte Gold Dredging Company. This has 85 buckets to thechain, each bucket having a capacity- of 5 cubic feet, and being oper-. FIG. 2.—DREDGE WORKING S.\ND PILE. ated at a normal speed of 22 buckets per minute. The dredge willdig from 50,000 to 75,000 cubic yards of material per month. Thereare some dredges using a 3;2-cubic-foot bucket which will not ex-ceed 50,000 cubic yards per month. The standard dredge, however,uses the 5-foot bucket. This dredge has a hull about 36 by 90 feeton the water line, with a draft of 5 feet. It is fitted with two spuds—one wood, 50 feet long, weighing about 10 tons; one steel, 50 feetlong, weighing about 17 tons. The swing permits of a cut about90 feet in width. The bucket line can be run continuously on anypoint of the controller from the third notch to full speed. Thestacker is 30 inches wide and about go feet long. .\ number of other successful installations equipped by the Gen-
Size: 1992px × 1254px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
