There is no wear except at the moment when the rope is
passing round the drum, and even then there need be no slipping or
grinding. The apparatus worked in the Neva was in very good condition
after running for four months day and night. After five months about
one-fifth of the parachutes had to be replaced, but after seven months the
hemp rope still showed no signs of wear. We think we have said enough to
show that for certain purposes, and especially, as we have, already
mentioned, for irrigation purposes, the new motor is well worthy of a
careful and extended trial. It may be questioned even whether we have not
here the germ of an idea which may hereafter enable us to solve one of the
most interesting and important of engineering problems, viz., the
utilization of the great store of power provided for us twice daily in the
ebb and flow of the tide.--_The Engineer._
* * * * *
IMPROVED SHAFTING LATHE.
Our engraving represents a new departure in shaft turning lathes, and is
the result of thirty years' experience in the manufacture of shafting,
with many years' study, to perfect a machine of the greatest practical
capacity and efficiency.
[Illustration: IMPROVED SHAFTING LATHE.]
The principal points of difference from a common engine lathe are readily
distinguished, among which may be mentioned the absence of centers and
tail stock, a traveling head with hollow driving spindle, and a stationary
tool rest and water tank.
Pages:
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130