Exhibits. 1. 2000 H. P. vertical triple expansion steam engine, directly coupled on the one side to a 900 kilowatt continuous current 500 volt dynamo built by the Elektrizitäts- Aktiengesellschaft vorm. Schuckert & Co. of Nürnberg and on the other side to an 850 kilowatt rotatory current 5000 volt dynamo by the same firm. The steam engine is a vertical 3 crank triple expansion engine with jet condenser, giving with a speed of 84 revolutions per minute and 10 atmospheres pressure 1000 H. P. normal for each dynamo. (The engine has been constructed for 100 revolutions per minute and gives at that speed 2500 H. P.) The dimensions of the engine are as follows: Diameter of the three steam cylinders 775, 1240 and 1800 millimetres, common stroke 1100 mm. The two air pumps driven by beams from the cross heads have a diameter each of 770 mm and 250 mm stroke. The total weight of the engine is nearly 240 000 kilograms, 40 000 of which fall on the fly wheels. The whole engine is built upon a bed plate which is in three parts. Upon this latter is the main shaft carried in 6 bearings, weighing nearly 14000 kg and having 380 mm in diameter. This shaft by reason of its length is made in two parts and provided on both sides with a coupling flange for coupling directly to the dynamo shafts, each of which runs in two bearings. The total length of the shaft which is carried in 10 bearings measures including the dynamo shafts nearly 17 metres. On the bed plate a forked cast iron Standard for each cylinder is mounted, carrying the cross head guides and provided with a large coaxial corresponding crown and firmly connected to two strengthening wrought iron pillars by means of powerful screws. The crowns of the Standards are connected to each other by cast intermediate pieces. Upon these crowns are centrally screwed the steam cylinders, without being directly in connection with each other, so that the various dilations by heat are allowed for in the best possible way. For the sake of convenient access to the valve gear the high pressure cylinder is placed in the centre and the intermediate and low pressure cylinders on either side of the first. The high pressure and intermediate cylinders have separate liners and are steam jacketted, the jackets being heated by live steam. The steam jacket is omitted from the low pressure cylinder and also the heating therefor; only both cylinder covers are heated. For convenience of access to the engine the bed plate is provided with stairs and handrails. In addition there are two galleries provided round the engine, at the centre height of the guides and of the steam cylinders and the high pressure cylinder is further accessible by means of a ladder with protecting hand rails. The valve gear for the high pressure cylinder is the double seated tubulär valve, while the intermediate and low pressure cylinders are fitted with circular (Corliss) valves.
