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184 PIPES AND NOZZLES.
C, Lever to govern the movement of B.
D, Rest for lever B.
The operation is as follows : When the lever, C, is in the rest, D, the deflecting nozzle, B, being of a larger diameter than nozzle, A, allows the stream of water from nozzle, A, to
pass through without obstruction. To move the pipe the lever is taken
from the rest and thrust in the direction in which it is desired to
throw the stream. Any movement of the lever, C, either to the right or left, or up or
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down, throws the end of the nozzle, B, into the stream of water. The force of the water striking B changes the course of the discharge, the entire machine moving in accordance with each change of the deflector.
Hoskins'
deflecting nozzle is of cast iron, of the same size as the main nozzle,
to which it is attached by a packed universal joint. This deflector is
operated by a lever in a manner similar to that already described. It
has the disadvantage of causing a constant interference with the stream
of water, and is somewhat dangerous to use.
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