Improvements in the Construction of Lubricators.
Year: 1888

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of Lubricators.
We, CARL SCHAEFFER and GUSTAV OEHLMANN, both of Berlin in the Kingdom of
Prussia, German Empire, Engineers 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 :—
Our invention refers principally to the construction of lubricators for shaft bearings
and relates to the method of regulating the supply of oil to the said bearings and
consists of a tightly closed oil reservoir connected by a tube to the bearing required
to be lubricated, this tube having a valve seat at its lower end and having a triangular
rod passing through it, this rod having a valve at its lower end which fits on a valve
seat in the tube and being provided at its upper end with a spring arrangement for
keeping an upward pressure on said valve rod; the oil reservoir is fitted with a tight
fitting cover which has a filling screw in the middle, this filling screw having a
regulating screw (fitted with a jam nut) in the centre of it which bears on the valve
spindle and having a small hole through it for a wire to pass through, in order to press
the valve rod down by the finger or other means when it is required to give a larger
supply of oil, the spring forcing the valve back into its former position when the
pressure from the wire is released.
In the accompanying drawings similar letters denote similar parts in the different
figurés.
Figure 1 shows a cross section of this improved lubricator with the valve d.
Figure 2 is an elevation of the same with a section of the screw b for screwing the
lubricator into the pedestal cap. Figure 3 represents a section of the improved
lubricator, showing how the valve rod is pressed down by the wire k and thus opening
the valve more. Figure 4 shows an elevation of the same with a section through
the cover F.
The glass oil reservoir A is fastened into the holder B and the holder B being screwed
into the cap of a plummer block by means of the screw threads b. The holder B has a
hole bored through its centre having a valve seat-c at its lower extremity into which
the rod I fits, having a head d¹ at its lower end, this head d having a valve d which
bears against the valve seat c, this rod D) is triangular in section where it passes through
the holder B but is round at its upper portion and passes through E which is provided
with a number of holes for letting the oil out. This case E is screwed into the holder B
at its bottom end and provided with screw threads at its top end, on which the
cover F screws by a projection on its under side and holds the oil reservoir A fast in
the holder B being made oil tight by the washers e and e¹; the division g in the case E

page_text: forms a guide for the rod D and against which the spiral spring G rests, the other end
of the spring bearing on the nut h which is screwed on the rod Dand forces the rod D
in an upward direction.
The filling screw H is screwed into the cover F the regulating screw 1 passing
through H the screw I being provided with a jam nut i to keep it in the proper position,
the rod D) has a small wire k screwed into its top end which passes through the
regulating screw I.
If the lubricator is screwed into a pedestal cap of a bearing and it is required to set
the lubricator in action the jam nut i is screwed back and the regulating screw I
screwed down, which presses the rod D down compressing the spring G and the
head is forced down also and thus opening the valve d and the oil flowing out
of the holes in the case E and down the tube, lubricates the bearing.
The oil collects on the point of the head and falls off in drops on to the
shaft to be lubricated.
The flow of the oil can be regulated according to the amount required. As the
drops of a given liquid are always of one and the same size, the number of drops
in a given time can be regulated to a nicety by the screw I, so that by this
lubricator the necessary lubrication is obtained by the least quantity of oil.
If the bearing becomes warm, through any cause the valve d' can be opened by
pressing the wire & down, quite independant of the screw I, so long as the pressure is
kept on the wire oil flows in a greater quantity on to the bearing and hinders the
heating of the same, but as soon as the pressure is released, the spring G presses
the rod D back again into its former position, and the oil can
now only flow
in the same quantity as the screw I adjusted it, as it is independent of the motion
of the wire k.
In order to fill the oil reservoir the filling screw H is unscrewed and removed,
and the oil poured through the opening.
The advantages of this lubricator are that the flow of oil can be stopped when
not required and the lubricator again set to work, delivering the same quantity of
oil as it was previously set for, which is accomplished by simply screwing back the
filling screw and so adjusting it that it delivers just the required amount of oil and
no more.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is:
1st. In lubricators the valve rod D provided at its lower extremity with the
valve d and the head adjusted by the regulating screw I passing through the
filling screw H substantially as described.
2nd. In lubricators the valve rod Dand the regulating screw 1 in combination with
the spiral spring G for the purpose specified.
3rd. In lubricators the valve rod D provided at its upper end with the wire k
in combination with the regulating screw I in the filling screw H for the purpose
specified.
4th. In lubricators the valve rod D, the regulating screw I and the spring G in
combination with the filling screw H for the purpose specified.
5th. The improved lubricator substantially as described with reference to
accompanying sheet of drawings and operating as and for the purposes specified..
Dated this Twelfth day of April 1888.