Improvements in Lubricators for Engine Cylinders.
Year: 1893

page_text: Date of Application, 27th Dec., 1893
Complete Specification Left, 27th Sept., 1894-Accepted, 27th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in Lubricators for Engine Cylinders.
I, EDWARD SYDNEY LUARD, of Malabar Hill, Bombay, India, Assistant
Locomotive Superintendent, Bombay, Baroda and Central India Railway, do
hereby declare the nature of this invention to be as follows:-
This invention relates to lubricators of that class in which the lubricant is fed
to the engine cylinder by the action of the piston therein when the supply of the
motive fluid is shut off, the object of the invention being to dispense with the wicks
which are generally used to syphon the lubricant as I find in practice that they
will not syphon thick lubricating oils.
According to my invention I employ a valve in conjunction with the usual back-
pressure valve and advantageously connected thereto so that when the said back-
pressure valve is forced upon its seat by the admission to the cylinder of the pressure
of the motive fluid in the usual manner, the first described valve will be caused to
open and allow a portion of the lubricant to flow into the space or chamber between
the said valves. When, however, the supply of motive fluid is shut off to the
cylinder the vacuum formed on one side of the piston therein canses the back-
pressure valve to lift and consequently the other valve to close upon its seat, the
portion of lubricant drawn into the chamber between the valves as above described
being sucked out by the vacuum.
Dated the 27th day of December 1902
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Lubricators for Engine Cylinders.
I, EDWARD SYDNEY LUARD, of Malabar Hill, Bombay, India, Assistant
Locomotive Superintendent Bombay, Baroda and Central India Railway, 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 :-
This invention relates to lubricators of that class in which the lubricant. is fed
to the engine cylinder by the action of the piston therein when the supply of the
motive fluid is sbut off, the object of the invention being to dispense with the wicks
which are generally used to syphon the lubricant as I find in practice that they
will not syphon thick lubricating oils, and I carry out my invention by combining
with the usual back-pressure valve a second valve in the novel manner hereinafter
described.
To enable any invention to be fully understood
reference to the accompanying drawing, in which :-
will describe the same by
Figure 1 is a vertical section of my improved lubricator; and,
Figure 2 is a plan:
Figure 3 is a section on the line 3-3, Figure 1, the valves being removed:

page_text: C
a is the fitting carrying the lubricant reservoir b, and c is the regulating valve,
all of which parts are of ordinary construction.
d is the syphon through which the lubricant is drawn from the reservoir, and e is
the back pressure valve which serves to prevent the steam pressure in the cylinder
from entering the reservoir.
is the valve which according to my invention I use in combination with the
valve e, the said valves e and being connected to a common stem g which moves in
one leg of the syphon. The said stem is of such length that when the valve e is
upon its seat the valve fis away from its seat, as shewn in Figure 1, and vice versa.
This stem is also preferably made of a triangular section as shewn in Figure 5 or
of any other suitable section so as to leave passages for permitting the flow of the
lubricant.
With this arrangement it will be understood that when the back pressure valve e
is forced upon its seat by the admission to the cylinder of the pressure of the
motive fluid in the usual manner, the valve will be open and allow a portion of
the lubricant to flow by gravity into the space or chamber between the said valves.
When, however, the supply of motive fluid to the cylinder is shut off the vacuum
formed by the movement of the piston therein causes the back pressure valve e to
lift and consequently the valve to close upon its seat, the portion of lubricant
drawn into the chamber between the valves as above described being sucked out
by the vacuum.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a lubricator the combination with the back pressure valve for preventing
the entrance of the pressure into the lubricant reservoir of a second valve so
arranged that when the back pressure valve is upon its seat the said second valve
is away from its seat and vice versa, all substantially as, and for the purpose,
described.
2. The manufacture and use of the improved lubricator bereinbefore described
and illustrated in the accompanying drawing.
Dated this 27th day of September 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.