An Improved Sight-feed Lubricator.
Year: 1888

page_text: Date of Application, 11th Oct., 1888
Complete Specification Left, 11th May, 1889-Accepted, 29th June, 1889
PROVISIONAL SPECIFICATION.
An Improved Sight-feed Lubricator.
I, GEORGE HENRY KENDALL, of Firth Street, Huddersfield in the County of York,
Engineer and Brass Founder, do hereby declare the nature of this invention to be
as follows:-
:-
My invention relates to improvements in that class of lubricators principally
employed for forcing regulated portions of oil into the cylinders steam pipes or
steam chests of steam-engines, but may be advantageously applied to other purposes
where such lubrication is required.
To carry out my invention the body of the lubricator is constructed in cylindrical
form, and is furnised with a well fitting cover.
At the lower part of the oil cylinder is fixed vertically a small force pump
supplied with oil from the oil cylinder, which oil flows into holes in the barrel of the
pump by gravitation and is forced from thence by means of the plunger which
is fitted with a cupped vulcanite bucket, expanding laterally when pressure is applied
thereby fitting the barrel of the pump tightly.
In the base of the pump is fitted a back-pressure valve working in a conical seat
and pressed back after each stroke of the pump into its seat by means of a spiral
spring.
At the top of the pump piston rod is formed an open crosshead in which revolves.
the cam which at one portion of its rotation gradually forces down the piston
thereby ejecting the oil from the cylinder.
At another portion of the revolution of the cam a curved projection or tappet,
formed integrally with the cam, catches the upper bar of the crosshead, thereby
lifting up the piston clear of the oil holes in the barrel of the pump, allowing oil
to flow into the pump ready for the next stroke.
The cam which actuates the pump is fixed upon a horizontal spindle which
passes through the sides of the oil-cylinder and upon this spindle is fixed a disc
which is rotated intermittingly by means of a clutch and lever.
The cam lever is connected by means of a cord or rod to any convenient recipro-
cating part of the engine, a screw stud on the lever being adjustable in order to
facilitate the regulation of the length of stroke of the lever, whereby the movement
of the disc on the cam spindle is accelerated or retarded, and the delivery of oil
from the pump is regulated.
At the side of the oil cylinder herein before described is placed the chamber with
open sides containing the sight glass, the bottom of which chamber is connected by
a passage
to the bottom of the pump. The glass is filled with water and a nozzle
conveying oil direct from the pump and projecting upwards into the water delivers
drops of oil into the water in which they may be seen rising to the top of the
chamber in which the sight glass is fixed.
A back pressure valve is fixed at the top of the glass chamber to prevent oil from
being forced back into the water.
The drops of oil after rising to the top of the water in the sight glass accumulate
until they overflow into a pipe connected with the cylinder or other object in which
the lubrication is required.
Dated this Seventeenth day of October 1888.
WILLIAM JAMES BAKER,
2, New Street, Huddersfield, Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Sight-feed Lubricator.
I, GEORGE HENRY KENDALL, of Firth Street, Huddersfield in the County of
York. Engineer and Brass Founder, 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 :—
My invention relates to improvements in that class of lubricators principally
employed for forcing regulated portions of oil into the cylinders, steam pipes, or
steam chests of steam engines, but may be advantageously applied to other purposes
where such lubrication is required.
To carry out my invention I employ an oil receptacle, by preference of cylindrical
form, contracted at its base to form the barrel of a force pump, into which pump
the oil descends from the receptacle above. The ram of the pump is actuated by
means of a double cam, driven from a shaft passing horizontally through the upper
part of the sides of the oil receptacle.
The ram of the pump is fitted with a cupped bucket, of a hard but elastic
composition known as "Woodite" or <<
Vulcanite," the cup opening downwards, to
cause it to expand laterally and fit tightly to the barrel when forcing oil. The ram
of the pump is fixed to an open crosshead, in which works the double cam, one wing
of which lifts the ram quickly, after which the other wing slowly depresses it, giving
the oil time to run into the barrel of the pump by gravitation. The pamp ram is
secured to the crosshead by means of an adjusting screw, whereby the height at
which the ram operates can be varied and thereby the quantity of oil delivered at
each stroke can be regulated.
The sight tube is mounted vertically upon a branch which projects horizontally
from the base of the oil vessel, and is provided with back pressure valves top and
bottom.
The cam shaft from which the pump is driven is actuated by means of a lever
and clutch, engaging with a disc upon the end of the cam shaft, the lever being
connected by means of a cord, wire, or rod to any convenient reciprocating part of
the engine.
A screw stud passing through a long slot in the clutch lever regulates the length
of stroke of the lever, and thereby the distance rotated by the disc on the cam-shaft
at each stroke.
In order to enable my invention to be fully understood I will proceed to describe
the same with reference to the accompanying drawings in which:
Figures 1 and 3 represent sectional elevations of my improved lubricator, Figure 2
represents an elevation of the same, and Figure 4 an elevation of the clutch mechanism
by means of which the cam shaft is driven.
Similar letters refer to similar parts in all the drawings.
The oil receptacle is represented at A which is contracted at B towards the base
to form the barrel of the force pump, in which works the plunger or ram H.
The plunger is actuated by the double cam E D formed preferably in one casting,
the wing D acting slowly in depressing the plunger coming in contact with the
lug D in the open crosshead F, and the wing E acting more rapidly in raising the
plunger by engaging with the lug E¹ also formed in the open crosshead F.
The plunger or ram consists of the sleeve H fitting upon the steady pin G,
which projects from the bottom of the crosshead F, the cylindrical shaft of the
plunger H. and the bucket K, which latter is formed of a hard elastic material
secured to the end of the plunger by a pin and nut, and further secured by a taper nut
which fits into the tapering mouth of the bucket, and by being screwed into the
bucket forces the edges out, thereby increasing the diameter of the mouth of the
bucket, and causing it to fit more tightly in the pump barrel.
The oil contained in the receptacle A runs down the openings L L, into the

page_text: annular recess M formed round the barrel of the pump, and when the bucket rises
above the recess, a certain portion of oil runs into the lower portion of the pump
barrel, whence it is ejected by the downstroke of the plunger.
The quantity of oil ejected at each full stroke of the pump is regulated by means
of the set screw J, by the operation of which the plunger can be caused to act in a
higher, or lower portion of the pump barrel. If caused to operate in the lower
portion of the barrel the bucket nearly touches the bottom at the extremity of its
down stroke, thereby expelling nearly all the oil contained in the barrel, but when
the set screw Jis adjusted for the plunger to operate in a higher portion of the
barrel, a larger quantity of oil is left in the barrel at the end of the stroke.
The branch pipe O supports the sight glass and its cover or guard U, and the back
pressure valve N prevents water being forced back from the sight glass R into the
oil receptacle. The oil escapes into the water contained in the sight glass R through
the nozzle Q, and drops of oil are seen through openings in the guard or cover U
ascending in the water in the glass.
Above the sight glass tube is fixed the back pressure valve S opening into
the tube T, which tube conducts the oil after rising through the sight tube to the
base of the oil receptable at F1, where the oil enters and flows down a duct G',
which is disconnected from the upper part of the vessel, but connected with the
steam pipe or other destination where the oil is to be delivered. Another back
pressure valve is fixed at F which closes if the sight glass is broken, or when the
union joint H is unscrewed.
The double cam D E is fixed upon the cam shaft C, which passes through the
stuffing box Y formed at the side of the oil receptacle, and is secured by the gland Z.
Upon the cam shaft is fixed the disc X, which is rotated by means of a clutch
device consisting of the cutter A' which grips the rim of the disc X, the spiral
spring B, and the lever W, in the slot of which is fixed at the required distance
from the centre of the cam shaft the adjustable screw stud J¹ to which is secured the
cord or rod connected with a moving part of the engine and giving motion to the
pump of the lubricator.
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 pumping or sight feed lubricator, double cams, one wing for raising the
pump ram quickly, and the other for depressing it slowly, such cams operating in an
open crosshead, which crosshead is connected to the ram by an adjustable device for
the purpose of regulating the quantity of oil discharged at each full stroke of the
pump, substantially as described and represented in the accompanying drawings.
2. In a pumping or sight feed lubricator, the oil receptacle contracted at its base to
form the pump barrel, with the oil holes communicating with an annular recess
round the barrel of the pump, into which recess the oil flows, and from which
recess it flows into the lower part of the barrel of the pump when the ram is raised
clear of the recess, substantially as described and represented in the accompanying
drawings.
or
3. In a pumping or sight feed lubricator, the pump bucket formed of "Woodite"
"Vulcanite," having the mouth opening downwards, the edges at the mouth
bevelled and fitted internally with a tapering nut, which being screwed up expands
the bucket causing it to fit more tightly in the pump barrel as required.
4. For the purpose of actuating the pump of a lubricator, the clutch device
consisting of the lever with adjustable screw stud, disc, cutter, and spiral spring, all
constructed and operating substantially in the manner described and represented.
5. In a pumping or sight feed lubricator the combination and general arrangement
of the various parts consisting of the oil vessel and pump barrel, the clutch device
for driving the cam shaft, the double cam operating in the open crosshead, the pump
ram adjustable with regard to the crosshead, the expanding pump bucket, the sight

page_text: tube, and the back pressure valves, all constructed and operating substantially in the
manner. and for tlie purposes described, and as represented in the accompanying
drawings.
Dated' this 8th day of May 1880.
WILLIAM JAMES BAKER,
2; New Street, Huddersfield, Agent for the Applicant: