IMPROVEMENTS IN LUBRICATORS
Year: 1885

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I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex
Engineer do hereby declare the nature of the invention for "IMPROVEMENTS IN
LUBRICATORS (A communication from Fred L McGahan of Indianapolis, Marion,
Indiana, United States of America Machinist) and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements in that class of lubricators, in which the
lubricant is automatically delivered from a reservoir to a moving part of a machine,
at intervals dependent on the movements of said moving part.
The object of this improvement is to provide a lubricator which may be attached
to the stationary part of mechanism having stationary and moving parts, as a
steam engine cylinder and piston, so that the oil or other fluid lubricant will be
discharged at intervals, directly upon said moving part, the discharge being effected
by the contact of the said moving part with the mechanism of the lubricator, as
hereinafter fully explained.
The accompanying drawings illustrate this invention as applied to the cylinder
of a steam engine.
The figure represents a central longitudinal section of the entire device.
A is the oil reservoir. B is a chamber, adapted at one end to be screwed into
the cylinder head, and having a hollow cylindrical interior which connects with
the reservoir through a hole b in the upper side.
D is a tube fitting nicely the interior of B so as to slide longitudinally therein,
and having an interior valve seat d and an exterior collar e. F is a hollow
cylindrical case, closed at one end and screwed at the opposite end, on to B.
A spiral spring g is enclosed within case Fone end of the spring resting against
the end of the case, and the other against the collar e on tube D thus holding said
collar normally against the end of B as shown.
.
The length of tube D is such that when B is screwed into the cylinder head
the end of the tube will come in contact with, and be pushed backward by the
piston E.
The interior of tube D when in its normal position connects with the reservoir,
through a hole f

page_text: A piston fills and projects backwards from that part of tube D which is back
of the hole fi is a valve fitted to the valve seat d and connected with piston h
by a rod Valve i is held normally to its seat, by a spiral spring & surrounding
the projecting portion of piston h and resting between the end of tube D and a
shoulder on the piston.
S is a set screw passing through the closed end of case F The operation of this
device is as follows.
The reservoir having been supplied with oil, the oil passes into tube D filling
said tube between valve i and piston h. The engine piston E moving toward the
cylinder head, comes in contact with the end of tube D within the cylinder, and
pushes the tube, and its contents backward. Hole in the tube first passes out of
communication with hole b in chamber B the end of piston h then comes in
contact with set screw S and the tube continuing to move backward the valve
seat recedes from the valve and a portion of the oil in the tube is forced by the
piston h out through the tube within the cylinder against the face of the piston,
and spreading outward thereon through notches n in the end of the .tube, reaches
the interior surface of the cylinder.
As the engine piston moves in the opposite direction and releases the tube,
valve i is drawn to its seat by spring , and tube D is returned to its normal
position by spring 9 By turning set screw S outward, the relative movement of
piston h within tube D is decreased and a correspondingly less amount of oil is
ejected.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent I declare that what I claim is
First The combination of the following elements, namely a machine having
two parts, one of which parts is stationary and the other part has a reciprocating
movement, within, or upon, said stationary part an oil reservoir attached to said
stationary part by a hollow connection, a tube having an opening communicating
with said oil reservoir, and having an interior valve seat, said tube arranged to
slide longitudinally within said hollow connection and to come in contact with
said reciprocating part a valve fitted to said valve seat, and operated by the
longitudinal movement of the said tube, and a piston connected to said valve and
operating simultaneously therewith, whereby oil is received from the reservoir and
ejected upon the reciprocating part as specified.
Second-The oil reservoir, the hollow chambers connected therewith, the tube
arranged to slide within said chamber the interior valve seat and valve within said
tube, the piston connected with the valve, the hollow case attached to the end of
the hollow chamber, the regulating screw and the springs for returning the said
tube and valve to their normal positions, all combined and adapted to co-operate,
as, and for the purpose specified.
A1