Improvements in Oil Cups or Lubricators.
Year: 1897

page_text: Date of Application, 30th Nov., 1897-Accepted, 12th Feb.,
1898
COMPLETE SPECIFICATION.
Improvements in Oil Cups or Lubricators.
I, JULIUS SCHWARZ, of 10, Schwabenthorstrasse, Freiburg, Breisgau, Grand
Duchy of Baden, in the Empire of Germany, Merchant, 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 designed to provide a neat and convenient kind of oil-cup or
lubricator suitable more especially for light bearings such as found in invalid
chairs, vehicles for children, sewing machines, velocipedes and the like.
An important feature of the invention consists in providing a spring closing
device for preventing any dust or dirt getting into the lubricator and bearing,
and also for preventing leakage or escape of oil from the said lubricator.
According to my said invention I provide the upper part of the oil-cup or
lubricator with a contracted filling aperture and I arrange a suitable spring inside
the oil cup which spring acts on a conical valve for closing the said aperture,
the arrangement being such that the valve opens outwardly but is drawn into and
retained in the aperture by the spring.
Instead of a conical valve opening outwardly I may employ a spherical valve
arranged to open inwardly, the spring being arranged to press the said valve into
the filling aperture from the interior of the oil cup.
In order that my invention may be clearly understood and readily carried into
effect I will proceed to describe the same fully with reference to the accompanying
drawings which are drawn to an enlarged scale, and in which
Figure 1 is a aide elevation of one form of my improved oil cup or lubricator
having a conical valve such as above mentioned.
Figure 2 is a plan of the same.
Figure 3 is a vertical section on the line z of Figure 2.
Figure 4 is a horizontal section on the line y y of Figure 3.
Figure 5 is a detail view illustrating a slight modification in the form of the
valve.
Figure 6 is a side elevation of one of my improved valves having a hollow
spherical or ball valve.
Figure 7 is a plan thereof.
Figure 8 is a vertical section on ' of Figure 7, and
Figure 9 is a horizontal section on the line y y' of Figure 8.
Referring more particularly to Figures 1 to 4, a is the body of the oil cup or
lubricator which in the present example consists of a hollow ball or sphere prefer-
ably of metal. This body a is secured by a fillet of solder or otherwise to a screw-
plug c having a central oil-passage c'. The screw plug is adapted to enter the oil-
hole of the bearing and serves to secure the lubricator in position in the well known
manner.
a' is the aperture by which the oil cup is filled. is the conical valve which is
adapted to close the said aperture, and has a knob or button d' for manipulating it.
e is the spring which acts upon the valve d and tends to cause it to close the
aperture a'. This spring which is helical is inserted in the oil cup, through the

page_text: opening which receives the screw plug, before the latter is secured in position.
The said spring abuts against the interior surface of the oil cup near the aperture a',
the wire forming the same being bent into a loop or fold e' projecting into the oil
passage and terminating in a straight portion or leg to which the valve d is
secured after the spring is placed in position. The loop e serves in this case as a
guide and ensures the proper action of the spring so that the latter is not liable to
stick, but always tends to draw the valve it into the aperture 1. Furthermore
the loop serves to keep the passage free from obstructions.
The normal position of the parts is seen in Figure 1. When however it is
required to fill the oil cup it is only necessary to press the valve d to one side into
the position shown in Figure 3 in order to uncover the aperture a¹ and allow the
lubricant to be poured in. On releasing the valve, the spring e immediately
returns it to its normal or closed position.
In the modification shown in Figure 5, the valve d has a flattened portion d
which when the valve is pushed to one side to open it, will rest on the edge of the
aperture a¹ and will remain in this position until disengaged.
Referring now to Figures 6 to 9, the valve d is as stated of hollow spherical form
und is arranged inside the oil cup while the spring e acts in a direction towards
the aperture and tends to force the ball valve into the same.
The upper coil of the spring forms a scat for the ball valve, and a loop e³ formed
in the wire of the spring projects through a hole in the valve and prevents the
latter from shifting on its seat. The spring terminates in a leg which projects
into the passage d' of the screw plug c and serves to guide the spring in its move-
ments. In this case it is only necessary to press the ball valve inward, in order to
permit the oil cup to be filled.
Obviously as the ball valve d is larger than the aperture a¹ it must be placed
inside the oil-cup before the latter is soldered on to the said plug c, as must also
the spring e.
It will be seen that in both forms of my improved valve, the lubricant in the
oil cup is protected by the valve from the action of the air and consequently retains
its properties for a very long time.
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. An oil cup or lubricator having a spring closing device the spring of which
is situated inside the body of the said oil cup or lubricator substantially as
described.
2. An oil cup or lubricator, having a spring closing device or valve, constructed
and operating substantially as described with reference to one or other of the
arrangements illustrated by the accompanying drawings.
Dated this 26th day of November 1897.
4
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.