Year: 1892

page_text: Date of Application, 1st Dec., 1892
Complete Specification Left, 1st Sept., 1893-Accepted, 7th Oct., 1893
My invention consists of a cylinder A and is provided with a piston B to which
is attached at each end a hydraulic cup, made of leather, dermatine, woodite, or
other suitable substance, which are held in position by screw caps C thus making a
perfect joint at each end of the piston B.
The said piston is worked up and down the cylinder by a crank D, upon the pin
of which is a steel block E which works horizontally through a circular slot F in
the centre of the piston.
The crank shaft d' is operated by a worm wheel G and worm H. Through the
centre of the said worm a spindle 1 passes, which is carried by a bracket I, this
bracket also forms the top cover of the cylinder.
On the said spindle is fixed a ratchet wheel J which is operated by a pawl j
carried by a lever K, the said lever being supported at one end by the spindle h'
and at the other end by a rod or line from a moving part of the engine to be
lubricated so as to operate the said ratchet wheel to the required extent at each
stroke of the engine.
The working of this invention is as follows;
Directly the piston B has reached the bottom of the cylinder A the slide
valve L immediately moves to the bottom of the slide jacket thus opening the
passage a¹ to the check valve M and sight feed N and at the same time opening the
passage a which is connected directly or otherwise to the oil tank or barrel.
Immediately the piston starts to move upwards the oil or lubricant which is
above it is forced out through passage a¹ then through check valve M into the
sight feed N to the part of the engine to be lubricated.
The vacuum formed at the bottom of the cylinder by the upward motion of the
piston draws the oil or lubricant from the oil tank or barrel through passage a³ into
the inside of slide valve L, through passage a² into the bottom of the cylinder,
thus refilling the bottom automatically.
When the piston B has reached the top, the slide valve L moves to the top of
slide jacket and immediately it starts its downward motion, the action of forcing
the oil or lubricant out through the check valve and sight feed and the automatic
filling of the top part of the cylinder is repeated, just reverse to the upward motion,
the oil or lubricant this time being forced through passage a' from the bottom and
being refilled through passage a¹ at the top.
The slide valve L is operated from the inside by a lever O which is connected to
a spindle P which passes from the inside of suction passage a³ to the outside of the
cylinder A, through a stuffing box Q as shown on Fig. 2; at the other end of the
said spindle is connected another lever O¹; this lever is operated by means of

page_text: the cam R. Fig. 4 the said cam being operated horizontally across the face of the
worm wheel G by a pin and roller which is fixed into the face of the said worm
wheel.
A steel or metal spring is placed between the outside of slide valve L and the
inside of slide jacket so as to keep the said slide valve always on the slide face of
cylinder.
COMPLETE SPECIFICATION.
Improvements in Lubricators.
I, WILLIAM BOAZ, of 29 West India Dock Road, Limehouse, in the County of
London, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the drawings filed with
my Provisional Specification and to the letters and figures marked thereon, that is
to say :-
My invention relates to improvements in mechanical lubricators more especially
adapted for supplying lubricant to the cylinders and slide valves of steam and other
fluid pressure engines.
For the purpose of my invention, I employ a cylinder in which works a double
acting plunger or piston, operated from the outside by means of a crank and suitable
mechanism. This cylinder is provided with a lever or tappet adapted to actuate a
slide valve and to thereby allow of the admission of the lubricant to the cylinder,
from the reservoir (through a suitable feed pipe), and the expulsion of said
lubricant from the cylinder, through a check valve, to a tube which is connected
to the sight feed, and thence through another tube to that part of the engine to be
lubricated.
At each movement of the plunger or piston, whether upward or downward, a
certain quantity of lubricant is forced out of the cylinder, and at the same time the
opposite end of the cylinder is refilled from the oil reservoir with which it is in
connection through the feed pipe.
And in order that my invention may be readily understood, I proceed to describe
the same fully with reference to the drawings filed with my Provisional
Specification.
Fig. 1 is a front elevation of a lubricator constructed according to my invention.
Fig. 2 is a plan of the same.
Fig. 3 is a longitudinal section on the line A, B, of Fig. 1.
Fig. 4 is a detached view of a cam plate forming part of the mechanism for
actuating the slide valve.
Fig. 5 is a vertical section, on line C, D, of Fig. 2, of the cylinder and its
accessories.
A is the cylinder, and B its plunger or piston which has attached at each end an
hydraulic cup made of leather, dermatine, woodite, or other suitable material.
These cups are held in position by means of screwed caps C, thus making a perfectly
tight joint at each end of the plunger or piston.
D is a craak by means of which the plunger or piston is worked reciprocally in
the cylinder, and upon the crank pin is mounted a steel block E which works in a
horizontal slot F formed in the centre of said plunger. d is the crank shaft which
is operated by means of a worm wheel G secured thereto, and in gear with a
worm H mounted upon a spindle carried by a bracket I; this bracket may also
form the top cover of the cylinder.
J is a ratchet wheel operated by a spring pawl which is carried by a lever K,
the said lever being supported at one end by the spindle h', and at the other by a
rod or line attached to a moving part of the engine to be lubricated, so that

page_text: the ratchet wheel may be operated to the required extent at each stroke of the
engine.
•
a', a, are the ports, ways, or passages which lead from opposite ends of the cylinder
to a valve chest and which are alternately suction and delivery ports or ways,
according to the direction of motion of the plunger or piston in the cylinder.
a is a recess formed in the cylinder between the two oil ports or ways above
mentioned, and in which works the tappet or lever O; it also serves as an inlet for
the oil or other lubricant led thereto by the inlet pipe, and as a suction passage
when the lubricator is at work, as hereinafter described.
is the valve chest; it is furnished with a slide valve L which is held against
the face of the ports, ways, or passages a', a², by means of a spring. This valve L
is operated from the inside by the tappet or lever O above mentioned, which is
mounted on a spindle P passing from the inside of the recess or suction passage a³
to the outside of the cylinder through a stuffing box Q (Figs. 1 and 2). To the
other end of the spindle P is secured a cranked lever O operated by the cam R
which moves in a horizontal direction across the front of the worm wheel G, the
movement of the cam being brought about by means of a pin and roller fixed to
the face of said worm wheel.
In some instances the cam R may be dispensed with, and the worm wheel G be
formed with a cam path to answer its purpose. In such case motion is imparted to
the crank arm O' by a lever or bar, one end of which may be supported upon the
boss of the worm wheel by means of a slot formed therein, and the other end by
the crank arm, a pin upon the said lever working in the recess in the worm wheel
and causing the requisite movement of the crank arm. To keep the said lever in
position against the face of the worm wheel G, the boss of said wheel may be
tapered inwards, and the slot formed in the lever may be bevelled to correspond.
The working is as follows:-
When the plunger or piston B has reached the end of its downward stroke, and
is therefore at the bottom of the cylinder A, the slide valve immediately moves to
the bottom of the valve chest, thereby opening the port, passage, or way a', and
allowing the lubricant to flow through the same to the check valve M, through
which it passes to the sight feed N, at the same time opening the port, passage, or
way a², and allowing the lubricant to flow from the suction passage a³, which is
connected directly, or otherwise, to the reservoir, down the passage a². Immediately
the plunger or piston commences its upward stroke, the oil or lubricant, which has
been drawn into the cylinder by the downward motion of the plunger or piston, is
forced out through the passage a', and then through the check valve M along the
bent tube into the sight feed N, and from there by means of another tube to the
part of the engine to be lubricated.
The vacuum formed at the bottom of the cylinder, by the upward motion of
the plunger or piston, draws the oil or lubricant from the tank or reservoir through
the suction passage a³ to the inside of the slide valve L, and through the passage a²
into the cylinder, thus automatically refilling the bottom part thereof. When the
piston has reached the top of its stroke, the slide valve L has moved to the top
of the valve chest, l, and immediately it commences its downward motion the action
of forcing the oil or lubricant out through the check valve M, and sight feed, and
the automatic filling of the top part of the cylinder is repeated reversely to the
upward motion, the oil or lubricant this time being forced through the passage a²
from the bottom, and being refilled through the passage a' at the top. Thus it will
be seen that the working of the lubricator is entirely automatic, it starts in operation
with the engine and continues feeding the exact amount of oil required until the
stopping of the engine.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. In a mechanical lubricator, the employment of a cylinder having a double

page_text: acting piston or plunger so constructed as to be actuated from the outside of the
cylinder, so that when said piston or plunger is moving in one direction lubricant
is being forced out through the port, way, or passage at one end of the cylinder,
while at the other end thereof it is being simultaneously drawn in through the
other port, way, or passage, thus rendering the working of the lubricator automatic,
substantially as set forth.
2. In a mechanical lubricator, the means or mechanism for actuating the slide
valve and thereby regulating the inlet and outlet of lubricant, substantially as
described and shown in the drawings.
3. The improved mechanical lubricator having its parts constructed, arranged,
and combined to operate, substantially as herein described and shown with reference
to the accompanying drawings.
Dated this 1st day of September 1895.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.