< Mechanical Lubricator >
William's lubricator is typical Wakefield
type. The original drawings show it is between
the main frames. However I draw it out on
the running board for easy maintenance. As
my William is 1 in. scale, it isn't so much
oversize. The operating arm is driven by
expansion link of the valve gear.
<< driving parts >>
The photo shows all of the mechanical parts.
The middle one is brass pump body. The valve
seat was cut with D-bit, reamed and finally
done 'seating' with a hammer.
The ratchet wheel is made from high carbon
steel rod. With the lathe head as an index
table, each teeth was cut with a sharp tool
moving to and fro by hand. Finally the rod
was parted off, hardened and tempered. The
axle is made from stainless steel and the
wheel was glued onto it with Loctite.
The bridle is made from silver steel. After
milling the inner hole, it was cut to a shape
and tempered. The ram is made from stainless
steel and glued into the bridle.
The eccentric is made from phosphor bronze.
After turning in the lathe, eccentric hole
is open in small boring machine.
The driving pawl has complicated shape. Three
holes were drilled first, then a paper pattern
was glued onto it and finished with fret
saw and file.
The operating rod was made from mild steel
bar. It was finished with a flat file and
three pairs of brass rollers. Each roller
can rotate freely. File all around the job
until the rollers rotate, then you can get
precise outline.
The spring socket was made from phosphor
bronze rod. The photo shows how to cut four
grooves around the socket.
The coil spring was made from stainless spring
wire. A suitable size of drill shank can
be used as a coiling mandrel. Note a brass
support in the tail stock to avoid warp of
the mandrel.
<< hand wheel >>
I decided to add a hand wheel to the lubricator
for an accent. Of course it is useful when
you want to supply oil to cylinders quickly.
The wheel is made from two components, inner
boss and outer ring. For the former, I prepare
brass square bar and cut four arc with end
mill, then it was turned to a desired diameter.
Next, the outer ring was silver soldered
onto the boss, then whole job was turned
to a final profile. The center square hole
was cut in the same way as the smokebox door
handle. After all, handling cock was silver
solder at one end of 'spoke'.
<< oil tank >>
The oil tank is made from brass sheet. Assembled
with small screws, the whole job was caulked
with silver solder. Then the screw head was
cut off with a file.
Assembled lubricator. The check spring was
made from phosphor bronze sheet. Providing
for worn out, the spring holder was made
adjustable.
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