. Giornale ferroviario elettrico . rially cut down.in conseguenza, la società ha effettuato un ordine per 300coasting registratori per consegna immediata. Questi registratori di costa sono simili a quelli utilizzati sulle linee sopraelevate e secondarie della Interborough Rapid Transit Company di NewYork e sulle vetture Broadway della Third Avenue Rail-Road Company. La Milwaukee Electric Railway & LightCompany è la prima strada nord-occidentale ad inaugu-valutare questo sistema. 386 ELECTRIC RAILWAY JOURNAL RECENTI SVILUPPI ED EFFICIENZE DELLE TURBINE [VOL XXXVII. N. 9. In un documento letto prima della Società degli ingegneri
2273 x 1099 px | 38,5 x 18,6 cm | 15,2 x 7,3 inches | 150dpi
Altre informazioni:
Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.
. Electric railway journal . rially cut down.In consequence, the company has placed an order for 300coasting recorders for immediate delivery. These coastingrecorders are similar to those in use on the elevated and sub-way lines of the Interborough Rapid Transit Company of NewYork, and on the Broadway cars of the Third Avenue Rail-road Company. The Milwaukee Electric Railway & LightCompany is the first prominent Northwestern road to inaugu-rate this system. 386 ELECTRIC RAILWAY JOURNAL RECENT TURBINE DEVELOPMENTS AND EFFICIENCIES [Vol. XXXVII. No. 9. In a paper read before the Engineers Society of Pennsyl-vania on Dec. 12, 1910, E. D. Dreyfus, of the WestinghouseMachine Company, presented some interesting data on steamturbines. Limitations in the electrical art have previouslyconfined the rotative speed of turbines within 1800 r.p.m. forsizes above 500 kw. To-day turbines of 2500 kw are verysatisfactorily operating at 3600 r.p.m., and 4000-kw turbinesof the same rotative speed are soon expected. In high-speed. 60-Cycle Double-Flow Turbine work generator rotors of the through shaft type have beenlargely superseded by designs having the shaft bolted to theends of the field disk by means of a non-magnetic coupling intwo-pole machines and integral with either half of the rotorin four-pole machines, the whole secured by bolts. The effect of rotative speed is forcibly brought out in thetable, which gives the principal dimensions on two 1000-kwturbines, 1800 r.p.m. and 3600 r.p.m. each. Comparative Dimensions. Low Speed. High Speed, 1000-kw Turbine. 1800 r.p.m. 3600 r.p.m. Length between bearings, approximately.... u ft. 7^ in. 8 ft. 8 in. Size of bearings, approximately 6 in. x 14 in. 4 in. x 9 in. Weight, including blading, approximately.. 7, 000 lb. _ 2, 000 lb. Maximum drum diameter, approximately... 3 ft. 1 54 in. join. Minimum drum diameter, approximately.... 17J4 in. 10^ in. Number of rows of blading, approximately.. 82 49 Largest blades (nominal heipht) 4 in. 4 in. S
