Improvements in Sight-feed Lubricators.
Year: 1892

page_text: Date of Application, 27th Oct., 1892
Complete Specification Left. 26th Aug., 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Sight-feed Lubricators.
I, ROBERT Wood, Secretary to the Firm of Emmott & Co. Limited, Publishers
and Proprietors of the "Mechanical World" and "Textile Manufacturer," of
2, New Bridge Street, Manchester, in the County of Lancaster, and 391, Strand,
London in the County of Middlesex do hereby declare the nature of this invention
(which has been communicated to me from abroad by William Frederick Charles
Fail of Eden Street, Dunedin in the Colony of New Zealand, Engineer) to be as
follows:-
This invention relates to that class of lubricator in which a small drop of the
lubricant is from time to time cansed to ascend or descend within a tube and find
its way to the portion of machinery it is desired to lubricate such apparatus
invariably having given to it the name of "sight-feed lubricator."
Hitherto these lubricators have chiefly been.constructed with a cylindrical glass
tube containing water through which the lubricant found its way from a small
nozzle at one end, to the part to be lubricated. This arrangement has been found
in many cases to be objectionable inasmuch as it is difficult to remove the glass
tube should it become broken while it is often a matter of extreme difficulty,
especially in out-of-the way places, to replace the tube by a new one.
The object of this invention is to overcome the defect named and also to improve
sight-feed lubricators in other parts of their details whereby they may be rendered
much more efficient, and in some parts interchangeable whilst at the same time so
arranged as: to be readily cleaned.
"
My invention therefore consists essentially in dispensing with, the glass tubes
and employing in their place, flat, convex, or other form of glass or transparent
discs, which may be readily replaced on breakage; in an improved form of
nozzle which may easily be taken out of its supporting casing to allow of the
adjacent parts being readily cleaned; in an improved arrangement of water
chamber and oil passages and in an improved shield to prevent grit or dirt falling
into the cup for receiving the oil.
In carrying out my invention I employ in place of the tube before named glass
discs, or discs made of any other transparent substance. These are fixed at the
front and back of the water chamber and may be of circular or other shape. They
are made either of flat or convex plate and kept in position by nuts or the like in
conjunction with packing rings to render the joints between them and the casing
water tight. The oil nozzle or jet is made removable and readily interchangeable.
I preferably make it in the form of a screw, or with a screw thread for a portion of
its length which fits into a corresponding thread in the casing of the chamber to
which it is further secured by a screw cap or nut. Or in some cases the jet may
be made plain.
The chambers or passages for the oil are so arranged that the latter enters at
the top of the tube along a channel past a regulating valve into a cavity from
whence it circulates round a groove and. through peculiarly shaped passages to the
water chamber. It then rises through the latter drop by drop through another
series of passages, past a second valve and thence to the parts of the machinery
to be lubricated.
To prevent dirt or grit becoming intermixed with the oil as the latter is being
poured into the cup shaped reservoir at the top of the oil c'umber I provide a flat

page_text: or convex shield which is secured to the central spindle and which is sufficiently
large to cover the reservoir and prevent access of dirt, dust or grit.
Dated this 26th day of October 1891.
Per pro EMMOTT & CO., LIMITED,
Robert Wood, Secretary,
2, New Bridge Street, Manchester, and 391, Strand, London,
Agents for the Applicant.
COMPLETE SPECIFICATION..
Improvements in Sight-feed Lubricators.
I, ROBERT WOOD, Secretary to the Firm of Emmott & Co. Limited, Publishers
and Proprietors of the "Mechanical World" and "Textile Manufacturer of
2 New Bridge Street Manchester in the County of Lancaster and 85, Strand
London, in the County of Middlesex 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 that class of lubricator in which a small drop of the
lubricant is from time to time caused to ascend or descend in a tube and find its
way along other tubes or pipes to the portion of machinery it is desired to lubricate
such apparatus having given to it the name of "sight-feed" lubricator.
Hitherto this class of lubricator has chiefly been constructed with a cylindrical
glass tube containing water through which the lubricant found its way from a small
nozzle at one end to tubes or pipes along which it was forced or conducted to the
portion of machinery to he lubricated. This arrangement has been found in many
cases to be an objectionable one inasmuch as it is difficult to remove the glass tube
.should it become broken whilst it is often a matter of extreme difficulty especially
in out-of-the-way places to replace the tube by a new one.
The object of this invention is to remedy the defect named and also to improve
sight-feed lubricators in other portions of their details whereby they may be
rendered much more efficient and some of their parts made interchangeable whilst
at the same time being so arranged as to be readily cleaned.
My invention therefore consists in dispensing with the glass tube and employing
in its place flat, convex, or other form of glass or transparent substance which may
be readily replaced on breakage; in an improved forin of nozzle which may easily
be taken out of its supporting casing to allow of it, and the parts adjacent, to it,
being readily cleaned; in an improved arrangement of water chamber and oil
passages and in an improved shield to prevent grit or dirt falling into the oil cup
at the top of the oil chamber.
:
My invention will be fully described with reference to the accompanying drawings
in which
Fig. 1 is a front elevation of the improved lubricator.
Fig. 2 side elevation of same..
Fig. 3 vertical section and
caps
all
Figs. 4 and 5 horizontal sections of the valves at each end of the water chamber..
In carrying out my invention I form the water chamber A somewhat in the form
of a sphere with two flattened sides a. These sides as will be seen more clearly in
Fig. 2 are extended to form screwed nipples a' on which corresponding screwed
may be placed. In place of employing a cylindrical sight tube I make use
of discs B of glass or other transparent substance. These 'discs as will be seen are
fixed both at the back and front of the water chamber A by the screwed caps a",
a packing ring of indiarubber, insertion or the like. being placed at either one or
both sides of the discs to make the joints tight. I may here mention that the
discs B may be either flat or convex and either circular as shown or of other shape,
the water chamber in the latter case being altered to suit. At each end the water
chamber is screwed so that tlie valves C and D may be readily secured thereto.

page_text: .
The oil nozzle or jet E through which the oil is passed to the water chamber A
is made removable and interchangeable instead of being made a fixture as is the
case in sight-feed lubricators hitherto used. I preferably support the nozzle by
means of the lower valve casing D. That is to say I drill a hole in the casing D
of a sufficient size to allow of the nozzle E being passed into it. This hole may be
formed with one or more seatings e to correspond with similar faces e' formed on
the nozzle E. Below the lower face el on the nozzle is formed a screwed portion.ell
that fits a correspondingly formed screw thread at the lower end of the hole in the
casing D. By these means the nozzle may be screwed home and secured in such a
manner that either of its faces e forms a joint with the corresponding face or
seating e. In order to enable the nozzle to be screwed home easily a square ell
or milled flange may be formed on it. A cap E' is screwed over the lower end of
the nozzle when the latter has been placed in position, packing rings E" being
used to make tight joints. I would here remark that it is not necessary to screw
the nozzle at the portion e" as it may be made plain and kept in position by the
cap E
At or about the centre of its length the nozzle is formed on the outside
with an annular groove F which is in communication with passages formed in the.
valve casing D and with holes f" that pass through the nozzle into its central oil
passage which in turn communicates with the water chamber A. By
constructing the nozzle in the manner I have described it may be readily removed
for cleaning purposes or substitution by a new one if it should become damaged,
without the necessity of removing the lubricator from its fixed position.
The third improvement relates to the construction of the water chamber and oil
passages. So far as the former is concerned I provide it with a long passage A
which is closed up by a plug A" so that by shutting off the steam and regulating
valves C and D and removing the nozzle E and cap E' the dirty water in the
chamber F can be run out and the chamber cleaned. After the nozzle E and
cap E have been replaced the chamber can be filled with clean water in a very
short time and the plug A" re-inserted.. The oil passages are formed in the
manner shown principally in Figs. 4 and 5. The oil passing down the tube 9 in
the inside of the oil, chamber G flows along the passages formed in the valve
casing D, past the valve d on its way, round the annular groove F, through the
holes in the nozzle up the central passage f" in the latter and through the water
chamber to the passages in the steam: valve C. These passages are formed in a
similar manner to those in the valve D and will therefore be easily understood
without further description other than by saying that the oil escapes at the end of
the passage è into the steam pipe.
The fourth improvement relates to the provision of a shield H. to cover the oil
cup so that grit or dirt may be prevented getting therein and mixing with the oil.
I is the water valve which communicates by the tube i with an ordinary condenser
and J is a drain cock or valve to enable the oil chamber G to be emptied for
cleaning purposes.
Kare unions to which the steam pipe may be attached, the
lower one being used merely as a support for the pipe there being no passage way
from it to the latter.
Assuming all the valves to be closed and the oil and water chambers to be filled
with their respective liquids the valve I is first opened to admit the water into the
oil chamber. The steam valve C is then opened followed by the opening of the
oil regulating valve D. The action of the lubricator is then similar to that of
other sight-feed lubricators the oil in the chamber & passing down the tube and
through the passages in the valve D, nozzle E water chamber A and valve C to
the outlet cas previously described. The quantity of oil passing the valve may
be regulated as required by opening or closing the latter as may also the pressure
of the steam by the valve C.
9
The method of fixing the lubricator may be varied as desired to suit circum-
stances. In the drawings it is designed for the lower attachment to be screwed
into the steam pipe, a pipe being carried from the upper union K to wherever
required or the upper union can be dispensed with and the lower one used instead,

page_text: thus forming an attachment for a direct supply of oil at once, or again a flange
can be made to take the place of the lower union K and the lubricator bolted to a
wall or other supports.
A sight-feed lubricator constructed as herein before described will be found to be
much more efficient in use than many at present on the market whilst it can be
easily cleaned and its most important parts readily. renewed with the least amount
of trouble.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent-and in what manner.
the same is to be performed, I declare that what I claim is
1. A sight-feed lubricator having its water chamber provided with flat convex
circular or other shaped transparent discs; its water chamber arranged to be easily
cleaned and to allow of the water being readily rênewed; its oil nozzle arranged to
be interchangeable; its oil cup protected by a shield and its oil passages arranged
in the manner and for the purposes substantially as described.
2. The application to sight-feed lubricators of transparent discs in place of the
ordinary sight tubes substantially as described.
3. A sight-feed lubricator having its oil jet or nozzle arranged to be readily
interchangeable substantially as and for the purposes hereinbefore described.
4. A sight-feed lubricator having its water chamber so arranged that it can be
most readily cleaned and replenished with water substantially as described.
5. A sight-feed lubricator provided with a shield to prevent grit or dirt getting
into the oil cup substantially as described.
6. A sight-feed lubricator having its oil passages, arranged substantially in the
manner as herein-before described."
7. A sight-feed lubricator constructed and arranged substantially in the manner
as herein before described and shown in the drawings annexed hereto.
Dated this 25th day of August 1893.
Per pro EMMOTT & CO., LIMITED,
Robert Wood, Secretary,
2, New Bridge Street, Manchester, and 85, Strand, London,
Agents for the Applicant.