Year: 1887

page_text: Date of Application, 7th Feb., 1887.
Complete Left, 7th Nov., 1887
Complete Accepted, 20th Dec., 1887
I, ROBERT MCLAREN YOUNG of 2 Brockenhurst Villas, Upton, Essex, Engineer,
do hereby declare the nature of this invention to be as follows:-
:-
My invention has reference to that class of lubricators known generally as sight
feed lubricators, and is devised mainly with a view to simplify the construction and
consequently to lessen the cost of manufacturing such apparatus, as also to increase
their efficiency and reliability.
In carrying out my invention I proceed as follows, that is to say :-In a suitably
shaped oil chamber, is accurately fitted a piston, the piston rod of which passes
through a stuffing box with which the cover of the aforesaid oil chamber is furnished.
To the upper part of the oil chamber is secured a sight tube which is filled with water,
and is provided at its lower extremity with a non-return valve for the purpose of
preventing the ingress of steam into the upper part of the oil chamber, as also to
retain the water within the sight tube.
The oil or other lubricant is placed in the upper part of the oil chamber above the
piston, steam having access to the lower part beneath the piston by means of suitable
pipes.
The area of the steam side of the piston being greater than the area on the oil side
by the difference of the area of the piston rod, the steam entering the lower part of
the chamber when the engine is working, exerts a pressure upon the piston equal to
the pressure on the area of the piston rod, forcing the oil or other lubricant gradually
out of the chamber through the sight tube and non-return valve, and thence by suitable
pipes to the part of the engine to which the improved lubricator is connected.
When the steam pressure is at its highest, the pressure on the piston will be
greatest, and the oil or other lubricant will become gradually reduced in quantity. On
shutting off steam the lubricator will cease working until the engine is again
started.

page_text: The piston rod of the apparatus above described is preferably formed hollow, in
order that the lubricant, which would have a tendency to solidify under the influence
of extreme cold, may, by means of the heated steam circulating within the hollow
piston rod, be maintained at the proper consistency or degree of Huidity necessary to
allow of the lubricant being circulated.
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Lubricators.
I ROBERT MCLAREN YOUNG of 2 Brockenhurst Villas, Upton, Essex, 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:
My Invention has reference to that class of Lubricators known generally as "Sight
feed Lubricators" and is devised mainly with a view to simplify the construction, to
improve the automatic action and to lessen the cost of manufacturing such apparatus.
In order that my Invention may be the better understood, I have appended the
accompanying Sheet of Drawings in which Figure 1 represents a plan and Figure 2
a sectional elevation of the improved lubricator according to my Invention.
In carrying out my Invention I proceed as follows, that is to say.
An oil chamber
or cylinder A, Figure 2, is fitted with a piston B provided with a hollow piston rod C
passing through a suitable stuffing box and gland D attached to the top cover of said
cylinder. Steam is admitted to the lower side of the piston B through the pipe F
such admission being afforded by the cock J.
A screw
The oil chamber or cylinder A is furnished with a port a communicating through a
pipe b with a chamber c, which is connected with a similar chamber d, a suitable
regulating valve e being interposed. The upper part of the chamber d is provided
with a "
drop nozzle", which projects upwards into a glass sight tube 9. attached by
means of suitable glands or stuffing boxes to the two chambers d and h.
plug i is fitted into the top of the chamber h for the purpose of inserting the glass
sight tube g, to allow of the latter being readily replaced in the event of an accident
as also for filling said tube with water-A similar plug is fitted into the bottom of
the chamber d for facilitating the draining and cleaning of the feed portion of the
apparatus.
A pipe G is attached to the chamber at H and is led into the main steam pipe
into which it is desired to pass the lubricant, and a branch pipe I is led from the pipe G
to the steam inlet pipe F, a two way cock J, being employed for controlling said
inlet. A small diaphragm k with a contracted orifice formed therein serves the
purpose of wire drawing the steam, and diminishing its velocity. A funnel K
provided with a screw plug allows of the lubricant being replenished from time to
time within the chamber or cylinder A.
The manner in which the contrivance according to my Invention is operated and
made to act as an automatic sight feed lubricator is as follows,
The chamber or cylinder A being filled with oil or other lubricant above the piston B,
pressure is applied below said piston B by means of the pipe F and cock J, and, since
the efficient area of the lower side of the piston is greater than that of the upper or
lubricant side by the difference of the area of the piston rod C, a gradual upward
motion is imparted to said piston by reason of the greater pressure upon the lower or
pressure side. The gradual motion tends to compress the lubricant and force it

page_text: through the port a into the pipe and thence into the chamber d where the supply
may be accurately regulated by the valve e. The glass tube g being filled with water
through the screw plug orifice i, the lubricant is forced drop by drop through the
drop nozzle and each drop rises by reason of the specific gravity of the lubricant
being less than that of the water before referred to.
<<
A gradual feed of oil or other lubricant is thus forced into the main delivery pipe
or other similar passage where such lubricant may be required to mingle with the
steam, hot air or other gas by means of the pipe G. In the pipe I the steam or
equivalent clastic gas is "wiredrawn" through the orifice k and partially condensed,
so that a cushion of water may always intervene between the steam pressing upon the
piston B, said cushion of water serving to secure the preservation of the packing of
said piston and to prevent possible leakage past it. The hollow piston rod C serves
to conduct the heat of the steam or equivalent elastic gas to the lubricant and liquify
it in cases where the external temperature is so low as to solidify said lubricant. It
will be seen that when the pressure upon the piston B is at its maximum, the delivery
of the oil or other lubricant through the "drop nozzle" will be also at its maximum
rate, subject always to the regulation of the valve e and when the engine is stopped
by reason of the steam being shut off, the lubricator ceases to act, and the oil or other
lubricant is not wasted unnecessarily.
I wish it also to be understood that upon a single oil chamber A, Figure 2, I may
construct as many ports a chambers hand d with sight glasses and regulating
valves e as may be required to force the lubricant through a corresponding number of
pipes G to the several parts of large engines, in such a manner that the sight feed is
under the control of the attendant, while the distribution of the lubricant before
referred to may be carried to a considerable distance from him-In such cases, a single
steampipe I and cock J connected between the main pipe and the oil vessel will suffice
to operate 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:
:
Firstly The improved lubricating device substantially as herein set forth and
shewn in the accompanying drawings.
Secondly. In a lubricating device such as referred to in the preceding claim, the
utilisation of the difference of the area of the piston on the under or pressure sido
relatively to that on the lubricant side by the difference of the arch of the piston rod,
substantially, as and for the purposes herein set forth.
Dated this Seventh day of November 1887.
37.
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.