Year: 1888

page_text: I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., the General
Patent Office, No. 4, South Street, Finsbury, in the County of Middlesex, Patent
Agents, do hereby declare the nature of this invention (a communication from abroad
by Charles Frederik Leopold Sörensen, of Copenhagen, in the Kingdom of Denmark,
Engineer) to be as follows:-
This invention relates to a continuous feed lubricator suitable for high pressure
engines.
Mechanical lubricators as hitherto constructed possess the great disadvantage of
requiring to be inspected at frequent intervals, that is to say, at least once daily.
When the piston after having forced out all the lubricant contained in the cylinder
reaches the end of its stroke, it is necessary to raise it and to refill the cylinder,
without which lubrication ceases.
By this invention these defects are obviated and in carrying out the invention a
piston is provided passing through a stuffing box into a cylinder under pressure so as
to drive out the oil through a tube whereby it is caused to enter the space subjected to
steam pressure.
A discharge valve prevents the oil from returning into the tube and at the same
time causes the cylinder on the return stroke of the piston to become refilled with oil
from a vessel also provided with a valve.
The continuous movement of the piston is advantageously effected by means of the
rotary movement of a cam or by other suitable arrangement; a suitable cam arrange-
ment comprises a disc the periphery of which is of a spiral form; the radii of the
spiral increase proportionately with the angle of rotation.
Another suitable arrangement of cam comprises a helical surface on a vertical axis ;
the helix only extends once round the axis and the pitch of the thread corresponds
with the length of stroke of the piston. It is however to be understood that I do not
confine myself to these arrangements of cams as they are only given as examples and
can be replaced by any other suitable arrangement.

page_text: A ratchet wheel is employed to turn the spiral disc or the screw or their
equivalent.
By this construction when the spiral disc or the screw or their equivalent turns, the
piston which by means of a spring is held against the surface of the cam, is forced to
descend slowly and with a uniform movement at the same time compressing the
spring until the piston has passed the terminating point of the spiral or until the
screw has made a complete revolution when the spring will carry back the piston to
its original position.
Dated the 20th dose of Wobsuany, 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Lubricating Apparatus.
I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., the General
Patent Office, No. 4, South Street, Finsbury, in the County of Middlesex, Patent
Agents, do hereby declare the nature of this invention (a communication from abroad
by Charles Frederik Leopold Sörensen, of Copenhagen, in the Kingdom of Denmark,
Engincer,) and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
This invention relates to a continuous feed lubricator suitable for high pressure
engines.
Mechanical lubricators as hitherto constructed possess the great disadvantage of
requiring to be inspected at frequent intervals, that is to say, at least once daily.
When the piston after having forced out all the lubricant contained in the cylinder
reaches the end of its stroke, it is necessary to raise it and to refill the cylinder, without
which lubrication ceases.
By this invention these defects are obviated and in carrying out the invention a
piston is provided passing through a stuffing box into a cylinder under pressure so as
to drive out the oil through a tube whereby it is caused to enter the space subjected
to steam pressure.
A discharge valve prevents the oil from returning into the tube and at the same
time causes the cylinder on the return stroke of the piston to become refilled with oil
from a vessel also provided with a valve.
The continuous movement of the piston is advantageously effected by means of the
rotary movement of a cam or by other suitable arrangement; a suitable cam arrange-
ment comprises a disc the periphery of which is of a spiral form; the radii of the
spiral increase proportionately with the angle of rotation.
Another suitable arrangement of cam comprises a helical surface on a vertical axis;
the helix only extends once round the axis and the pitch of the thread corresponds
with the length of stroke of the piston. It is however to be understood that I do not
confine myself to these arrangements of cams as they are only given as examples and
can be replaced by any other suitable arrangement.
A ratchet wheel is employed to turn the spiral disc or the screw
equivalent.
or their
By this construction when the spiral disc or the screw or their equivalent turns, the
piston which by means of a spring is held against the surface of the cam, is forced to
descend slowly and with a uniform movement at the same time compressing the spring
until the piston has passed the terminating point of the spiral or until the screw has
made a complete revolution when the spring will carry back the piston to its original
position.
In order to enable the invention to be fully understood, I will describe how it can
be carried into practice by reference to the accompanying drawing, in which
Figure 1 is a side view partly in section of the improved apparatus provided with a
spiral cam, the section being taken on the line A B of figure 2.

page_text: Figure 2 is a front view partly in section taken on the line C D E of figure 1.
Figure 3 is a plan, and
Figure 4 is a side view showing the modified arrangement in which a helical cam is
employed.
1
a is the ratchet wheel which turns in the direction shown by the arrow in figure 1
at the same time turning the spiral disc or the helix or their equivalent fixed on the
arbor c of the ratchet wheel d'is the piston which by means of the spring e, is caused
to follow or to bear against the periphery of the spiral, the thread of the helix, &c.-It
will thus be seen that when the piston has passed the terminating point of the spiral
or when the helix has made a complete revolution the spring e will immediately cause
the piston to reascend and retake its normal position. f is the cylinder into which the
piston draws oil from the reservoir g through the valve h; under the pressure of the
piston the oil is forced out of the cylinder f, through the valve i, and thence into
the pipe k, which opens into the place where the oil is to be used. The cylinder f,
the piston guide 7, and its screw o, which prevents the piston from turning, as well
as the bearings m, in which turns the arbor c, are firmly connected to the frame n
which serves for fixing the entire apparatus on a machine or wherever it may be
required for use.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1.) A lubricator having a piston which is automatically and instantaneously carried
back to its starting point, the said piston drawing in the lubricant in such a manner
that being placed in communication with a reservoir containing sufficient lubricant it
will work continuously without requiring to be frequently inspected..
(2.) The improved lubricators hereinbefore described with reference to the accom-
panying drawing.
1011 1
1
1000