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CROSS COMPOIJND AIR C01\lPRESSOHS
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TYPE "F-l-A"
I.UBRlCA'l'OR
47
A heating chamber, which is connected
to
the steam
exhaust pipe of the compressor, is provided to keep the
oil in the lubricator at a proper temperature to insure
satisfactory operation. Lagging is applied to the body
of the lubricator to afford additional assurance that the
oil is maintained at a proper operating temperature
when the lubricator is exposed to low temperatures. This
lagging is held in plaee by a suitable removable metal
covering secured to the body of the lubricator .
While the standard construction has six oil
if any of these are not
can be omlttea
as described later.
Operation
Referring to section assembly
Fig. 17, as the
low pressure air piston of the compressor moves up, air
pressure is developed on the face of the lubricator oper
ating piston 33 and moves it against the force of piston
spring 38, carrying with it pawl 4a, which engages with
a tooth in ratchet wheel 28. This rotates the ratchet
wheel one notch, and .pawl 4 drops into a tooth of the
ratchet wheel to prevent the wheel moving backward.
On the down stroke of the compressor low pressure air
the pressure is reduced on'the face of operating
33, and spring 38 returns the piston and attached
to their
The ratchet wheel, as. previously stated, is
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to the earn 27, The upper side of the earn flange is an
inclined plane, and as the cam is moved, the thin edge
of the inclined plane enters a slot in the plunger rod,
As the cam continues to move, it lifts the plunger in its
,
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