Year: 1897

page_text: Date of Application, 4th Feb., 1897
Complete Specification Left, 15th Sept., 1897-Accepted, 11th Dec., 1897
I, JOHN BROMILOW, of William Street Brass Works, Heywood, near Manchester,
in the County of Lancaster, Brass founder and Finisher, do hereby declare the
nature of this invention to be as follows :-
==
This invention relates to improvements in sight feed lubricators and has for its
object, firstly, to provide means whereby the oil is prevented from blowing back into
the sight glass of lubricators when applied to high and low pressure cylinders.
Secondly to provide means for reducing the steain pressure acting against the oil
when the Inbricator is applied to steam pipes or valve chests thus preventing the oil
being blown back into the sight glass by the at-cam.
To this end when fixed to high pressure cylinders I employ in the bottom of the
lubricator and in connection with a small tube which conveys oil from the top of the
sight glass to the cylinder, a valve which cuts off and establishes communication
between the lubricator aud cylinder alternately, so as to prevent the oil blowing back
into the sight glass and allow of feeding oil when required respectively.
In employing the said valve I increase the diameter of the lower part of the oil
passage in the bottom of the lubricator, whilst the upper end of the said increased
passage I form with a seat for the valve and the lower end I adapt to receive a hollow
plug, the valve itself being placed and allowed play between the said seat and inner
end of the hollow plug. The bottom part of the said valve is cup shaped and formed
with side passages through which the oil from the sight glass flows into said hollow
plug for use in the cylinder.
To prevent any oil being blown back when the said valve closes I employ above
the top of the side glass a brass plug drilled through its centre and so shaped as to
forun a second chainber at the top of the sight glass and to screw down on the same
and thus make a steam tight joint with rubber washer.
The oil on being forced into the sight glass rises through the water in the saiḍ
glass to the top of the aforesaid brass plug and then falls into the said chamber and
thence to the valve for use in the cylinder.
When applied to low pressure cylinders I employ the said valve at the bottom of
the sight glass which is situated directly under the oil chamber. The oil is regulated
by a valve which establishes communication between the said oil chamber and sight
glass. The oil after passing through the sight glass falls upon the said valve, which
opens by vacuum and allows the oil to pass into the cylinder and closes on pressure
taking place, thus stopping the oil from being blown back into the sight glass.
When the valve is applied to lubricators fixed on high or low pressure cylinders
no pressure can pass into the sight glass therefore they are not liable to break.
When employing the said valve to lubricators fixed to high and low pressure
cylinders the upper end or stem of the valve is of the ordinary kind whereas when
used in lubricators fixed to steam pipes or valve chests I employ a valve with a coned
upper end or stem having formed flats thereon for the passage of the oil which cone

page_text: part serves to reduce the pressure acting against the oil and also to reduce pressure
in the glass.
Thated t
1007
F. BOSSHARDT & Co.
Agents to Applicant.
Improvements in sight reed Lubricators."
I, JOHN BROMILOw, of William Street Brass Works, Heywood, near Manchester, in
the County of Lancaster, Brass founder and Finisher, 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 improvements in sight feed lubricators and has for its
object, firstly, to provide means whereby the oil is prevented from blowing back into
the sight glass of lubricators when applied to high and low pressure cylinders.
Secondly, to provide means for reducing the steam pressure acting against the oil, 1
when the lubricator is applied to steam pipes or valve chests, thus preventing the
oil being blown back into the sight glass by the steam.
And in order that my invention may be more fully understood I have caused to be
appended hereunto one sheet of drawings marked with letters of reference indicating
like parts in the various figures, Fig. 1 is a vertical section and Fig. 2 a plan in 2
section of a sight feed lubricator for use in connection with a high pressure cylinder,
Fig. 3 is an elevation partly in section of a lubricator for low pressure cylinder, Fig. 4
a longitudinal section and Fig. 5 a plan in section of a sight feed lubricator for use
in connection with the supply pipe or valve chest of a steam engine.
In carrying out my invention and referring to Figs. 1 & 2, in constructing 2
a lubricator for bigh pressure cylinders I employ in the bottom of the oil vessel a,
a valve d in connection with the small tube b which conveys oil from the top of the
sight glass c to the cylinder of the engine, which valve cuts off and establishes
communication between the oil vessel a and the cylinder alternatively, so as to
prevent the oil blowing back into the sight glass c and allow of feeding oil when 3
required respectively.
In employing the valve d, I increase the diameter of the lower end of the oil
passage at the bottom of the oil vessel a, whilst the upper end of the said increased
passage I forin with a seat f for the reception of the valve d and the lower end
I adapt to receive a hollow plug g, the valve d being placed and allowed play 3
between the seat f and inner end of the hollow plug g. The bottom part of the
valve dis cup shaped and formed with side passages d' through which and the
hollow plug g the oil from the sight glass o flows for use in the cylinder.
To prevent any oil being blown back into the sight glass c when the valve & closes,
I screw into the part which usually holds the top of the sight glass ca brass plug h 4
drilled through its centre and adapted to form an extension of, aud chamber i, above,
the sight glass c, a steam tight joint being made between the said plug and glass by
the aid of the washer k.
The oil on being forced into the sight glass c rises through the water in the same
to the top of the plug h, then falls into the chamber and through pipe b and 4
passage e to the valve d for use in the cylinder.
The oil in the vessel a is forced in predetermined quantities into the sight glass o
by means of a small pump suitably actuated and forming an extension of the
passage m, the piston extending through the side of the vessel a.
Referring to Fig. 3, when applying my invention to lubricators for low pressure 5

page_text: cylinders where the sight glass c is in line with and directly under the oil vessel a,
I employ the valve d at the bottom of the sight glass o. The quantity of oil to be
fed is regulated by the valve n which establishes communication between the oil
vessel and sight glass c. The oil after passing through the sight glass o falls upon
the valve d, which opens by vacuum and allows the oil to pass into the cylinder and
closes on pressure taking place, thus stopping the oil from being blown back into the
sight glass.
It will thus be seen that when fixing lubricators furnished with the valve d to high
or low pressure cylinders no pressure can enter the sight glass c and it is therefore
not liable to break.
In lubricators for high or low pressure cylinders I form the upper end or stem d'
of the valve d ordinarily, as shown in Figs. 1 & 3, whereas when applied to lubricators
of the condensor type for instance such as shown in Figs. 4 & 5, fixed to steam supply
pipes or valve chests, I employ the same in connection with the pipe & leading from
the chamber i to the passage o communicating with the steam supply pipe or valve
chest, and its upper end I form with a cone d' having flats de for the passage of the
oil from the pipe b to the steam supply pipe or valve chest, which cone partly cuts
off the communication between the pipe b and passage o and thus reduces the
pressure acting against the oil and also that in the sight glass c.
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
-
1st. In sight feed lubricators for high or low pressure cylinders, the employment
of a valve d, d, d in the passage e leading from the sight feed glass c to the
cylinder, adapted to prevent the oil from being blown back into the sight feed glass c,
all substantially as and for the purpose set forth.
2nd. In sight feed lubricators fixed to steam supply pipes or valve chests of
engines, the employment of a reducing valve d, d², d³ in connection with the pipe b
leading from the feed glass to the said steam supply or valve chest, all substantially
as and for the purpose set forth.
3rd. In sight feed lubricators of the type shown in Figs. 1, 2, 4, & 5, a hollow
plug forming an extension of the sight feed glass c and a chamber i at its upper
end in communication with the sight feed glass c and outlet pipe b, all substantially
as and for the purpose set forth.
Dated this 14th day of Stent 1807