Improvements in Sight-feed Lubricators.
Year: 1893

page_text: Date of Application, 27th Jan., 1893
Complete Specification Left, 15th Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Sight-feed Lubricators.
I, JOHN MCLEOWNAN MCMURTRIE of 99 Portugal Street, Glasgow, in the
County of Lanark, Brassfounder, do hereby declare the nature of this invention
(which is partly communicated to me by Harry Murray and Alexander Paterson
both of Suparn, Baugh Road, Parel, Bombay, India,) to be as follows:-
This invention which relates to sight feed lubricators has for its objects to obviate
the risk of over-heating or boiling the lubricant in the oil cup, to prevent return
of the oil from the oil cup and back from the glass, and to provide facilities for
cleaning the water glass through which the lubricant ascends in drops on its way
to the cylinder or bearing to be lubricated.
The steam from the boiler or other source by whose condensation the oil in the
oil vessel is caused to overflow and pass to the cylinder to be lubricated instead of
being led in direct at the lower end of the oil vessel is led in by an orifice which
may be provided with a valve at the upper end of the lubricator and thence as it
condenses passes in the form of water down through a passage formed at the side
of the oil cup to a water inlet at the under side of the cup said inlet being normally
closed by a ball or other non-return valve which may or may not be provided with
a spring the said valve serving to prevent the return of the oil from the cup. The
steam being in practice condensed at the surface of the water which ordinarily
collects in the passage its heat is dissipated and is not communicated to the
lubricant. A port or passage which may be normally closed. by a spring pressed
or other non return valve communicates between the steam inlet and the upper end
of the water guage glass through which the drops of the lubricant ascend on their
passage to the cylinder or other part to be lubricated, and at the lower end of the
guage glass & drain pipe provided with a cook or valve is fitted in the casing. By
closing the conical valve which regulates the passage of the drops of lubricant
through the water and opening the drain cock the steam under pressure blows off
the water through the drain pipe and impinging on the inner surface of the glass
effectually cleans off any grease adhering to it. By means of this devico for
cleaning the glass the unscrewing of the plug which is usually provided to give
access for cleaning the glass by hand may be obviated.
Dated this 26th day of January 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Sight-feed Lubricators.
I, JOHN MOLEOWNAN MO MURTRIE of 99 Portugal Street Glasgow in the
County of Lanark Brassfounder do hereby declare the nature of this invention and
in what manner the same is to be performed, as partly communicated to me to be
particularly described and ascertained in and by the following statement :—
This invention which relates to sight feed lubricators has for its objects to
obviate the risk of over-heating or boiling the lubricant in the oil cup to prevent
return of the oil from the oil cup and back from the glass and to provide facilitios
for cleaning the water glass through which the lubricant ascends in drops on its
way to the cylinder or bearing to be lubricated.
In the accompanying drawings which illustrate the invention Figures 1 and 2

page_text: •
are vertical sections at right angles to each other of a modification of the improved
lubricator.
Figure 3 is a sectional plan of the same and Figure 4 is a vertical section
showing a slightly modified form of the improved lubricator. In general appear-
ance the improved lubricator resembles any of the well known forms of sight feed
lubricators but the steam from the boiler or other source by whose condensation
the oil in the oil vessel is caused to overflow and pass to the cylinder to be lubricated
instead of boing led in direct at the lower end of the oil cup A is led in by an
orifice B which may be provided with a valve C at the upper end of the lubricator
and thence as it condenses passes in the form of water down through a passage D
formed at the side of the oil cup A to a water inlet E at the under side of the
cup A Baid inlet being normally closed by a ball or other non-return valve F which
may or may not be acted on by a spring the said valve serving to proveut the
return of the oil from the cup. The steam being in practice condensed at the
Burface of the water which ordinarily collects in the passage D its heat is to a large
extent dissipated and is not communicated to the lubricant in the cup A. A port
or passage G which may be normally closed by a spring pressed or other non
return valve H communicates betweon the steam inlet B and the upper end I of
the water guage glass J through which the drops of the lubricant ascend as
indicated on their passage to tho oylinder or other part to be lubricated and at the
lower end of the guage glass a drain pipe K provided with a cock or valve Ļ is
fitted in the casing. By closing the conical valve M usually provided to regulate
the passage of the drops of lubricant through the water and opening the drain
cock L the steam under pressure from the passage G blows off the water through
the drain pipe K and impinging on the innor surface of the glass J effectually
cleans off any grease adhering to it. By means of this device for cleaning the glass
the unscrewing of the plug N which is usually provided to give access for cleaning
the glass by hand may be obviated.
·
In the modification represented at Figures 1, 2 and 3 one oil cup A is shown as
supplying the lubricant in drops through two water glasses J situated one on each
side of it and at the steam inlet B the ports or passages G diverge and lead one
to each water glass an arrangement which is particularly applicable for use in
locomotive engines. The oil cup may howovor bo connected to only a single water
glass or to a greater number of glasses. In the modification represented at
Figure 4 a guage glass O is shown as provided for indicating the level of the oil
and water in the oil cup.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be perforined as partly communicated
to me I declare that what I claim is :-
1. The combination of parts constituting the improved sight feed lubricator
bereinbefore described with roference to the annexed drawings.
2. In a sight feed lubricator the arrangement of the non return valve at the
bottom of the oil cap in combination with a passage leading thereinto and formed
down the said oil cup and wherein the steam used for displacing the lubricant is
condensed substantially as described.
3. In a sight feed lubricator the provision of means for cleaning the water glass
by the action of steam substantially as described.
4. In a sight feed lubricator the use of the non-return valve H in the steam
passage G substantially as described.
Dated this 14th day of September 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.