Improvements in Lubricators.
Year: 1892

page_text: Date of Application, 27th June, 1892
Complete Specification Left, 26th July, 1892-Accepted, 3rd Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Lubricators.
1, DAVID DOODY, of 25 Tudor Street, Cardiff, in the County of Glamorgan,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to lubricators chiefly designed for loose running pulleys and.
other rotating parts of machinery.
In carrying out my invention I provide a cup adapted to be screwed to the
pulley-boss or other part to be lubricated or the said cup may be cast integral with
such part.
The cup is provided with a cover which may be made removable.
Longitudinally through this cup 1 pass a screw which is held against longitudinal
movement and within the cup and engaging with the said screw I fit a piston held
against rotation and adapted to be longitudinally moved within the cup by the
rotation of the screw which is provided with a milled head or the like. In one side
of the cup I form an opening through which the lubricant can be introduced into
the cup when the piston is at the top thereof, the said opening being provided with
a plug for closing it.
With this construction it will be obvious that when the lubricator is filled with
Jubricant the rotation of the screw will cause the piston to press upon the lubricant
and force the same into contact with the surface to be lubricated.
Some of the advantages of my lubricator are that the lubricant can be kept free
from dirt, that the waste of lubricant, if not entirely avoided, is reduced to a
minimum and that time and labour are saved by its use.
Dated the 27th day of June 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Lubricators.
I, DAVID DOODY, of 25, Tudor Street, Cardiff, in the County of Glamorgan,
Mechanical 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:-
My invention relates to lubricators chiefly designed for loose running pulleys and
other rotating parts of machinery.
In carrying out my invention I provide a cup adapted to be screwed to the
pulley-boss or other part to be lubricated; or the said cup may be cast integral
with such part. The cup is provided with a cover which may be made removable.
Longitudinally through this cup I pass a screw which is held against longitudinal
movement, and within the cup and engaging with the said screw I fit a piston held
against rotation and adapted to be longitudinally moved within the cup by the
rotation of the screw which is provided with a milled-head or the like.
In one side of the cup I form an opening through which the lubricant can be
introduced into the cup when the piston is at the top thereof, the said opening
being provided with a plug for closing it.
To enable my invention to be fully understood i will describe the same by
reference to the accompanying drawings, in which :-
Figure 1 is an elevation of a belt-pulley having my improved lubricator applied
thereto; and,

page_text: Figure 2 is a vertical section through the pulley and the lubricator;
Figure 3 is a section through the lubricator on the line a x, Figure 2; and,
Figure 4 is a detail thereof.
Figure 5 is an elevation illustrating the application of my invention to a car-
wheel; and,
Figure 6 is a vertical section through the said wheel aud. the lubricator.
Similar letters of reference indicate corresponding parts in all the figures.
a indicates the cup of the lubricator and the cap or cover thereof, and a plug
for closing the hole in the cup through which the lubricant is introduced; say by a
syringe. e is the piston by which the lubricant is forced out of the cup; the said
piston, as shewn in the 'drawing, being, provided on its periphery, with lugsid, d
sliding in grooves e, e formed on the inner face of the cup, the said lugs and grooves
serving to prevent the rotation of the piston. is the screw by means of which the
piston is moved longitudinally within the cup. the screw itself being held against
longitudinal movement. With this arrangement it will be obvious that when the
screw is rotated by means of a milled-head g applied thereto the piston will be
caused to press upon the lubricant to force the same out of the cup into contact
with the surface to be lubricated.
In the arrangement of my invention illustrated in Figures 1 and 2 the cup a is
adapted to be screwed to the boss of the pulley and the cap is formed integral
with the cup. The screw is held against longitudinal movement by means of a
bar, Figure 3, bearing against the bottom of the cup and a screw or rivet i passed
through the plate into the end of the screw f
In the modification shewn in Figures 5 and 6 the cup is cast integral with the
boss of the wheel and the cap 6 is made detachable. The screw is held against
longitudinal movement by forming the upper part thereof of a less diameter than
the threaded part of the screw so as to form a shoulder which will bear against the
inside of the cap; the shoulder on the outside of the cover being formed by the
milled-head g attached to the screw by the pin j; the lower end of the screw is
carried in a bearing in the cross-bar h, the ends of which are located in the bottom
of the grooves ee. In this modification the plug may be dispensed with the cup
being filled by removing the detachable cap with the piston and screw.
Although I have described my lubricator as applied to rotating wheels it is to be
understood that it may also be applied to fixed parts requiring to be lubricated, for
instance, it may be applied to the plummer-block or bearing of a shaft or spindle.
Some of the advantages of my lubricator are that the lubricant can be kept free
from dirt, that the waste of lubricant, if not entirely avoided, is reduced to a
minimum and that time and labour are saved by its use.
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 1
claim is :-
1. In a lubricator the combination of a cup, a piston sliding in the said cup. and
held against rotation, and a screw passing through the said piston and adapted to
be rotated to cause the piston to move in the cup, the said screw being held against
longitudinal displacement, substantially as described.
2. The improvements in lubricators herein before described and illustrated in
Figures 1 to 4 and Eigures 5 and 6 of the accompanying drawings.
Dated the 26th day, of. July 1899
G. F. REDFERN & Co.,
4, South Street; Finsbury, London, Agents for the Applicant