Laserfiche WebLink
Derry Ranch No. 3. <br />WORKINGS. <br />This dredge has been working only a few days and hea <br />I <br />snot more than half an acre worked out up to the present <br />!time. ~ . <br />j EQUIPMENT. <br />i' The Boat is 107a42 Peet .with 82 - 5 1~2 cu .f t. <br />'buckets which weigh about 1360 lbs. each and the pins <br />'wE~tgh about 90 lbs. each. The steel digging spud <br />weighs about 35000 lbs. cad the wooden moving spud <br />!weighs about 1800 lbs. <br />I The motor Por the main drive is a 100 H.P. Fairbanks <br />ldoree Induoticn Motor (vo~ta 2200, cy 80, phase 3, <br />Iepeed 900 R.P.M.). The motor on the pumps is s 76 <br />H.P. Fairbanks Morse (BO cy. 2200 volts, ~ phase, <br />~18 amp, 1180 R.P.M.) The motor on the trommele ie a <br />20 H.P. Fairbanks Morse (440 volts, 80 cy, ?.8 ampa~ <br />per phase, 1200 R.P.M.). The motor starter le 60-76 <br />H.P. Fairbanks Morse (80 cy, 3 phase, 2200 volts). <br />i The large pampa are De Laval Centrifugal (cap. 3486 <br />gale. per minute. Head 86, speed 1160). The emnll <br />!pumps are De Laynl Oentrifupal (cap. 2400 Rals. per <br />;min., head 26, apoefl 1160). <br />The roaietance toile which are Pour in number are <br />located in the.wonohroom, while tho transformers aro <br />~,in a transformer house on dry land. The equipment of <br />thu transformer house ie as follows: <br />'1'rarsformers (13000 volts to 2200 volts), WestinF_houee <br />switch board, lightening arrester and ourrant meter. <br />~! Tho machine Whop is equipped with the followings <br />ell olectriaelly driven by s SO H.P. O.P.'. ldotor: <br />Hack saw, drill press, emery wheel and blower far forge. <br />008T8 ANA BTATI3TI08. <br />Tho power furnished by the Oolorado Power Oornpany at <br />rowlar rates. <br /> <br /> <br />