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povember, 1914 THE MARINE REVIEW : 437 arrangement can be gathered from the - Supplement. The centrifugal governor had a ver- tical axis and actuated a valve supply- ing oil under pressure to the servo- motor in a well-known manner. The governor moved this valve through a lever k, the fulcrum 7 of which could be shifted by means of the rod r and bell crank g by altering the length of the rod f, which could be effected by means of the hand wheel 1. The speed could thus be fixed at any speed between 1000 to 500 revolutions per minute, and at whatever speed the governor was thus fixed by the engineer the turbine was governed should a change of load occur. : As a final measure of security, an emergency governor of the shaft type was provided--as shown in the Sup- plement--acting on the special valve-- _also shown in the drawing. The main valve was balanced and could be com- pletely closed in 414 revolutions. With the arrangements described changing from full power ahead to above, the handling of the turbine was a simple matter, and it was only when full power astern that the main stop valve had to be closed, and thus the arrangement was the same as_ that which obtains with reciprocating steam engines. Transformer Simplified | y Emergency Regulator Speed Regulator. Connection to the Servomotor -- --+ § ESS ay Sliding Foot Connection As regards the transformer, the gen- eral design is the same as- has often been described, but simplified in certain directions. Thus, there was only one secondary wheel D,, and only one set of guide blades C, between this wheel and the reversing primary wheel Au. The simplification was possible owing to the small ratio of transformation 4 of Servomotor Speed Regulator ys \ Throttle Valve Longitudinal Section through Main Turbine and Transformer 3 i to 1, and notwithstanding the smallness I. sey of the diameter of the reversing wheel, = oe the ratio of the ahead to the astern a power was 7/0 per cent. which was ; considered ample. . Moreover, the small volume of the + a reverse wheel casing was soon filled f S| with water, and thus the time of re- ° t| versal was much reduced. Another a 7] 3 'alteration was that the first ahead a5 | eS secondary wheel B, and with it all 2 | primary and secondary wheels, were Ss, ie made in one piece, which permitted the = i following method of erection: us 2 | The spring rings m were first placed > 2 on the primary shaft P--Supplement-- - . then followed the astern primary wheel if 3 | ' * A, and the gland ». Over the latter | = Ra é | n s : were then pushed on in one piece the | 2 eT : a wheels B and D,, viz., the first forward 5 rw fo 3 : 3 5 secondary wheel and the astern sec- | . 2 a ondary wheel. Then followed the ahead | ; ' s AG primary wheel A, slipped over the oe oe " front end of the primary shaft and fixed thereto by a set screw head o:. The flange p of the wheel B was then