A Small Water Motor For Driving Dynamos
By W. E. Leach
A water motor, owing to the variety of uses it may be put to, will
find ready call among experimenters. It is not at all difficult to
construct and below I describe one that I made and used
successfully to drive a dynamo, sharpen tools, as a drill, and also
as a small lathe.
The first thing to obtain is the materials. These consist briefly
of the following: 1 piece 2" x 8" x 10" plank (hard wood), 2 pieces
1" x 8" x 10" board (pine), some 1/4" X 1/2" board (soft or hard
wood) 7 - 5" X 3/16" bolts, 4 1 1/2" X 3/16" bolts, 1 piece brass
tubing 1/2" in diameter, 2 1/2" long (for nozzle).
To begin with, cut a case from the piece of plank as shown in Fig.
1 A and B. Bore seven 1/4" holes thru this as shown. At the bottom
bore a 1 1/2" hole for an outlet. Then at the top. bore a 1/2" hole
about 12° to the horizontal: this is the inlet. The rotating
section is made up as shown in Fig. 2 A and B. The vanes or paddles
are cut from 1/2" boards and of dimensions shown. They are hollowed
out at the ends and are set into an axle cut from a piece of hard
wood 1 1/4" x 2" with a 1/4" hole thru the center.
To make the nozzle take the piece of brass tubing above mentioned
and solder to it a cone shaped piece of tin as in Fig. 3 - A. Now
drive this into hole at top of case until its tip first comes to
the inner edge.
Now for the sides, cut two pieces out of 1" pine as shown in Fig.
4. Bore 7 1/4" holes thru these to correspond to those in the case
(Fig. 1). At the center bore a 1" hole, and about 1" away from the
center in a perpendicular line, drill one 1/4" hole on each side of
this as shown. Now make two plates 3" in diameter and 1/4" thick as
shown in B (Fig. 4). Bore a 1/4" hole in the center and about 1" to
either side bore another 1/4" hole. Make two plates of iron as in
Fig. 3 - B. Drill holes to correspond to those in the plates, Fig.
4 - B.
Give all parts two coats of good water-resisting paint and when dry
assemble as follows: Place a plate (Fig. 4-B) on the outside of the
sides, put a wad of packing soaked in oil in the 1" hole. Then
place an iron strip (Fig. 3-B) on the inside of each side and bolt
firmly together with two 1 1/2" X 3/16" bolts. Drive a shaft thru
the rotating part. Insert one end of shaft thru one side and then
place inside of case. Put the 7, 5" x 3/16" bolts thru and fasten
the other side together. (In setting up, if some pitch is placed
between the sides and case it will prevent any leakage.) Connect
the motor to any faucet by a rubber hose and it is ready for work.
If all parts were smooth and bored and cut accurately, little
trouble will present itself and the motor will go buzzing around at
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