Improvements in Lubricators.
Year: 1887

page_text: Date of Application, 21st May, 1887
Complete Left, '21st Feb., 1888
Complete Accepted, 27th Apr., 1888
Improvements in Lubricators.
L, JOHANN GEORG GOTTLIEB ELIAS BISCHOFF of Hamburg, in the Empire of
Germany, Engineer, do hereby declare the nature of this invention to be as
follows:-
The invention relates to improvements in lubricators for introducing lubricating
material into the cylinders of steam engines and pumps and for similar purposes.
The objects of my improvements are to force the lubricant periodically into the said
cylinders as long as the piston therein is in motion; and to allow the lubricator to be
filled even when it is in operation.
The lubricating material is filled into a reservoir the interior of which communicates
by a small canal with the interior of a pumping cylinder wherein are arranged two
pistons. These pistons are attached to a sliding frame in such a manner that the
one piston is regidly fixed to the frame, while a certain play is allowed to the other
piston within the limits of a neck provided thereon.
The sliding frame is jointed by a connecting rod with the crank of a shaft which is
intermittingly rotated by means of a ratchet wheel and a ratchet worked by a moving
part of the steam engine, pump or the like. Thus the rotation of the shaft causes a
reciprocating motion of the sliding frame. During the movement towards the crank
shaft both pistons advance closely, as the one piston pushes the other forwards.
During the return motion however the piston provided with the neck remains
stationary at first, whereby the intermediate space between both pistons is filled
automatically with lubricating material from the cup through the said canal. The
piston provided with the neck is subsequently moved along by the sliding frame,
whereby the lubricating material is transported over a second canal arranged sideways
from the first canal and connecting the pumping cylinder with the working cylinder
to be lubricated. A small valve is pushed by the pressure of the gas, steam or
fluid of the working cylinder towards its seat placed above the valve thus closing
the second canal at the lower end.

page_text: To inject the lubricating material into the working cylinder the crank is provided
with a finger which presses the loose piston towards the fixed one, while the lubricating
material enclosed between both pistons is above the second canal and the mouth of
the first canal is closed by the loose piston; thus the enclosed lubricating material is
forced into the second canal. The surplus of pressure thereby produced causes the
valve to recede from its seat, thus allowing the lubricant to pass through the
longitudinal notches of the valve into the working cylinder. By this evacuation of
the lubricant a compensation of pressure and finally a surplus of pressure is produced
in the working cylinder, whereby the valve is raised again towards its seat thus closing
the second canal.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: I, JOHANN GEORG GOTTLIEB ELIAS BISOHOFF of Hamburg, in the Empire of
Germany, 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 improvements in lubricators for introducing the lubricating
material into the cylinders of steam engines and pumps and for similar purposes.
The objects of my improvements are to force the lubricant periodically into the
said cylinders as long as the piston therein is in motion and to allow the lubricator to
be filled even when it is in operation.
I attain these objects by the apparatus illustrated in the accompanying drawings,
in which,
Figure 1 is a sectional side elevation and
Figure 2 a side elevation partly in section of a lubricator constructed according
to my invention, both Figures showing different positions of the working parts.
Figure 3 is a horizontal section of Figure 2.
Figure 4 is a sectional side elevation."
Figure 5 a horizontal section of a modified form of lubricator.
Figures 6, 7, 8 and 9 are vertical and horizontal sections of the principal working
parts showing different positions of the same.
Similar letters refer to similar parts throughout the several views.
The lubricating material is filled into the reservoir b, the interior of which com-
municates by the canal or passage c with the interior of a small cylinder a wherein are
arranged two pistons ƒ and g. These pistons are attached to the sliding frame in
such a manner that the piston is regidly fixed to the frame, while a certain play is
allowed to the piston g within the limits of its neck g¹.
The sliding frame h is jointed by the connecting-rod k with the crank i of the
shaft m, which is intermittingly rotated by means of a ratchet-wheel and a ratchet
working by a moving part of the steam-engine, pump or the like. Thus the rotation
of the shaft m causes a reciprocating motion of the sliding frame. During the
movement toward the crank-shaft m both pistons advance closely, Figure 1, as
the piston pushes the piston g forward, but during the return motion the piston g
remains at first stationary, whereby the intermediate space between both pistons is
filled automatically with lubricating material from the cup through the channel or
passage c. The pistons y is subsequently taken along by the frame h whereby the
lubricating material is transported to the canal or passage e Figure 2, arranged.
sidewise from the canal or passage c and connecting the cylinder a with the working-
cylinder to be lubricated. A sinall valve is pushed by the pressure of the gas, steam
or fluid of the working-cylinder toward its seat placed above the valve, thus closing
the canal or passage e at the lower end.

page_text: To inject the lubricating material into the working cylinder, the crank i is provided
with a finger o which presses the piston g toward the piston while the lubricating
material enclosed between both pistons is above the canal or passage e and the mouth
of the canal or passage c is closed by the piston g. Thus the enclosed lubricating
material is forced into the canal or passage e. The surplus of pressure thereby pro-
duced causes the valve n to recede from its seat, thus allowing the lubricant to pass
through the longitudinal notches of the valve into the working cylinder, but by this
evacuation of the lubricant a compensation of pressure, and finally a surplus of
pressure, takes place in the working cylinder, whereby the valve is raised again
toward its seat, thus closing the canal e.
In the modified apparatus illustrated in the Figures 4 to 9 the ends of the two
pistons and g do not fit close against each other, but they are correspondingly recessed
so as to engage with one another, but permit within certain limits the movements
towards one another. The frame h¹h in the former construction connected with
both pistons and moving with the same is pivoted to the cylinder a and serves to
arrest the piston fat a given moment, whilst the oil is forced into the working
cylinder of the steam-engine pump or the like.
Figures 4 and 5 show the two pistons ƒ and g on the end of their inward stroke
within the cylinder a where they remain stationary until the crank i has passed from
one end of the slits in the connecting rod k to the other whereby the canals or
passages cand e are kept closed by the projecting end parts t and u of the pistons f
and g. The crank subsequently causes the outward stroke of the piston 9 until it
arrives in the position shown in Figures 6 and 7 while the space formed by the recess
of the piston is filled with the lubricant. The piston f is now taken along by the
piston g, whereby the lubricating material is transported over the canal or passage e,
Figures 8 and 9, and the arm 2 of the pivoted frame is admitted to descend by its
overweight and to prevent the out stroke of the piston f, while the piston g is moved
towards the latter and the lubricant injected into the working cylinder.
To continue the further function of the lubricator, as described, a projection or
cam connected with the crank-shaft m acting upon the arm h³ of the pivoted frame
serves to disengage the piston f from the latter. During the following period the
frame is sustained in its inclined position by the piston as shown by Figures 4
and 6.
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 :-
First In apparatus for lubricating working-cylinders of steam-engines, pumps
and the like, the combination of the two pistons ƒ and g with the reciprocating slide h
and the finger o together with the cylinder a provided with canals or passages c and e,
substantially as and for the purpose specified.
Second In apparatus for lubricating working cylinders of steam engines, pumps
and the like, the combination of the two pistons f and 9 engaging with one another
by recesses forming the space for the reception of the lubricating material, with the
vibrating frame h¹ ½³ and the cam " on the crank-shaft m, together with the cylinder a
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sified
Dated this 21st day of February 1000.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.