1903. ] EMMET—THE CURTIS STEAM TURBINE. #0 
limited by the imperfections of high-speed gearing, that its effi- 
ciency is not particularly high, and that the design is not con- 
veniently applicable to large sizes. ‘The Parsons type is principally 
limited by the multiplicity and weight of its parts, and the high 
cost of construction. 
The Curtis turbine retains some of the features of its prede- 
cessors, but introduces new ideas which make possible a much 
lower speed, less weight, fewer and simpler parts, higher economy, 
less cost, and other important advantages. 
The general arrangement of a turbine generating-unit of this 
type is shown by the drawings which accompany this paper. Its 
functions may be briefly described as follows, and are illustrated by 
the accompanying cut: 
STEAM CHEST 
ZY) CCK AVY 
>> MOVING BLADES 
CCG vx10000 exs0es 
DPD PPP} wovme acaves 
CCC STATIONARY BLADES 
DD PPDPPDPDPDDDDDDDDD DY MOVING BLADES 
~~ . ~ ~ ~~ DIAPHRAGM 
vome xeesl LD} 
aise KER 
SOO 
= “=p drPDIDY))) ) Bi Dy 
Diagram of Nozzles and Buckets in Curtis Steam Turbine. 
