Improvements in Lubricators for Solid or Semi-solid but Plastic Lubricant.
Year: 1888

page_text: Date of Application, 15th Aug., 1888
Complete Specification Left, 14th May, 1889-Accepted, 6th July, 1889
Improvements in Lubricators for Solid or Semi-solid but Plastic
Lubricant.
I, FREDERICK WILLOUGHBY MACDONALD, of 105 Upper Stanhope Street in the
City of Liverpool, Marine Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention is for improvements in lubricators used for delivering solid grease
into bearings and the like.
I form my lubricator of 1st.-A box or chamber capable of being lessened in
cubical contents by means of a screw thread formed on one portion of the chamber
into which works the screw thread on the other portion of the chamber. 2nd.-A
device for checking or preventing the turn of one part of the box on the other
through accidental causes such as vibration. 3rd. An orifice leading to the
shank which is screwed or otherwise fitted into the bearing. 4th.-A piece of wire
gauze or other perforated rose or plate covering the mouth of the orifice so as to
prevent any rough dirt entering it with the grease. 5th.-A collar and washer, on
the shank to prevent the shank from turning back through the vibration of the engine
or other cause. 6th. The shank which connects the chamber with the bearing.
One or two parts can be omitted in exceptional cases.
The
In carrying out my invention I prefer to have the bottom of the lubricator screwed
into the top rather than the top screwed into the bottom but if desirable the latter
plan can be used instead of the former. In this case, however there preferably
should be wings or projections fixed on the upper part so as to enable it to be turned
round on the lower. The device for checking I prefer to consist of a spring with a
pin or projection at the end fitting into a groove cut out of the thread of the upper
and lower parts of the box. The thread can be cut vertically at several points in the
upper box but only once where the spring catch is fixed. on the lower one.
spring catch being in such cases fastened to the lower. It is obvious however that if
the arrangement of the box be reversed the catch can be placed on the upper part.
The rose I prefer to make of ordinary iron, steel, or bronze wire gauze. The shank
is preferably formed wider at the top than where it is screwed into the bearing, thus
forming a shoulder at the top of the screw and upon this shoulder I, prefer to place a
leather washer. This leather washer enables the lubricator to be screwed, very tightly
onto the bearing & prevents the easy unscrewing of the same.
.”
1
1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Lubricators for Solid or Semi;solid but Plastic
Lubricant.
I, FREDERICK WILLOUGHBY MACDONALD of 105, Upper Stanhope Street, Liverpool,
in the County, of Lancaster, Marine 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 :-
This invention is for improvements in lubricators applicable for delivering solid
crease into bearings and the like.

page_text: The accompanying drawings show a lubricator constructed in accordance with my
invention and attached to the cap of an ordinary bearing.
Figure 1 is a vertical section.
Figure 2 is a reversed plan of the upper part of the lubricator detached.
The lubricator consists of a detachable box A adapted to contain the fat or other
lubricant, and provided with an internal screw thread a. This box A is supported
(when in position) upon the lower portion B, which has a corresponding external
thread b. The upper and lower portions A and B thus form a covered chamber, the
cubical capacity of which may be increased or lessened as desired, by screwing or
unscrewing the parts to a greater or less extent.
The upper part A has a milled edge a¹ or its equivalent to facilitate turning. I
prefer to have the bottom of the lubricator screwed into the top, rather than the top
screwed into the bottom, but, if desirable, the latter plan can be used instead of the
former. In this case, however, there preferably should be wings or projections fixed
on the upper part, so as to enable it to be turned round on the lower.
In order to prevent accidental unscrewing or displacement of the parts A and B
with relation to each other, and also to provide a check or indicator for the amount
of feed, I attach the following device.
This consists of a spring E fitting into a groove or grooves cut out of the thread of
the upper and lower parts of the box. The thread can be cut vertically as shown, at
several points a¹ in the upper box A, but only one groove b¹ is necessary where the
spring catch E is fixed on the lower portion B, the spring catch being, in such cases,
fastened to the lower portion. It is obvious, however, that if the arrangement of the
box be reversed, the catch can be placed on the upper part.
The lower portion, B, is provided with a feed orifice c¹, which passes through a
shank C, B¹. The top of this orifice is preferably widened out or dished, as at c², in
such a manner that it is impossible to force out the whole of the lubricant by screwing
the parts together, thus a small portion is always held in reserve.
The inner portion of the shank C, B', aforesaid is preferably formed of a separate
tube C of copper or some other material which is a good conductor of heat, and (when
the lubricator is in position) its lower end reaches to within a short distance of the
moving parts.
The upper end of the feed orifice is covered by wire gauze c or its equivalent, such
as a rose or perforated plate, which effectually prevents the exit of any coarse
dirt with the grease. This I prefer to make of ordinary iron, steel, or bronze wire
gauze.
In order to attach the lubricator to a pedestal 'cap or to other required part, the
upper portion B₁ of the shank is screwed, facets B2 being provided on the lower
portion B of the lubricator, to fit a spanner or other tool.
A washer 62 of leather or some other slightly yielding material is placed between
the lower portion B and the pedestal cap, to prevent the lubricator from turning back
through the vibration of the engine or other cause, it also enables the lubricator to
be screwed very tightly on to the bearing, and prevents the easy unscrewing of the
same.
It is to be understood that I do not bind myself to the exact form or proportions
herein before described and shown, as many slight modifications may be made without
departing from the scope of my invention.
The mode of action is as follows:-
The lower portion B of the lubricator is placed in such a position, on the pedestal
cap, for instance, that the lower part C of the shank reaches well into or near the
working parts. The upper portion being filled with the grease, is screwed on to the
lower portion B, in such a manner that the lubricant is forced down the orifice in
the shank, and the amount of such feed may be observed or controlled by means of
the check device.
The inner part C of the shank, being of good conducting material, will transmit
any heat caused by friction to the grease, which is thereby melted, and so prevents
over heating.

page_text: 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 :-
1. A lubricator for solid plastic lubricant, consisting essentially of a main supply
chamber formed of two portions A, B, adapted to be screwed together in such a
manner as to reduce the size of the chamber and force out the lubricant, a hollow
shank of good heat conducting material carried by the lower portion B, and adapted
to be secured to the bearing with its lower extremity in close proximity to the
moving part to be lubricated, means for preventing the slacking back of the upper
portion A through vibration or otherwise, and a device for filtering the lubricant, the
whole combined substantially as described and shown and for the purposes set forth.
2. In a lubricator such as described having its supply chamber formed of two
portions screwing one upon the other, a spring catch or check device carried by one
of said portions and adapted to engage with its free end a transverse groove or one
of a series of grooves in the screw thread of the other portion, substantially as
described and shown and for the purposes set forth.
3. The herein described improvements in lubricators, whereby the risk of displace-
ment by vibration is prevented and the chances of heated bearings are reduced, sub-
stantially as described and shown.
1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.