Improvements in Lubricators.
Year: 1899

page_text: Date of Application, 24th Jan., 1899
Complete Specification Left, 12th Oct., 1899-Accepted, 30th Dec., 1899
Improvements in Lubricators.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:-
-
This invention relates to an automatic lubricator for the bearings of shafts
and trunnions (or journals) and consists of an oil chamber provided at the bottom
with an outlet orifice, an inner displacing piston, mechanism for moving such
piston, and stirring apparatus.
The piston is suspended from a screw-spindle passing through two worm-wheels
placed one over the other. Both wheels operate in conjunction with the worm
and are held in the upper part of the oil chamber against axial displacement.
The two worm wheels, though alike as regards their pitch circles or rims, do
not possess quite the same number of teeth, one wheel, having, say, 40 teeth.
and the other, 41 teeth. The wheel having the larger number of teeth and
consequently the smaller pitch of the two, is joined with the spindle of the
piston by means of a groove and tongue, while the other wheel is fitted to the
spindle by means of inner screw-thread. The difference in the pitch of the
two wheels is so slight, that both are capable of co-operating with the same
The outwardly
worm, even though the mutual gearing is not strictly accurate.
projecting spindle of the worm carries any suitable driving gear, such, for example,
as a cord wheel, which is set in motion when the lubricator is required to operate;
whereby motion is also imparted to the worm-gearing, which causes the piston
to revolve and at the same time to perform a very slow downward feeding move-
ment, owing to the fact that the screw is slightly held back and rotated in the
inner screw-thread of the worm wheel by the other worm-wheel. By such means
the lubricating oil is conveyed to the bearing through the outlet tube in a very
gradual manner.
With the rotary piston there is combined a stirring appliance, which, in one
arrangement consists of a central tube and stirring arms, while, in another
arrangement it comprises a series of tubes arranged unsymmetrically about the
axis of the piston. The central tube is, guided through a central channel pro-
vided in the piston, in which the unsymmetrically arranged tubes extend through
the piston itself. Perforations are made in the walls of the tubes, so that a
lubricant, such as graphite (or plumbago) placed in the tubes may mix with the
oil.
By the time the piston has reached the lower end of its stroke, its spindle has
left the inner screw-thread of the worm-wheel, so that the worm-gearing, which
continues in motion, does not depress the piston further. In order to restore
the piston to its raised position, it is necessary to apply a certain degree of
upward pressure to the screw spindle so, that, as the worm-wheel is rotated
backwards, it may once more come into engagement with the inner screw-thread.

page_text: This upward pressure is produced by the buoyancy of the wood or hollow piston.
in the oil, and may, if necessary be assisted by suitable springs. The worm
wheel and the piston may be rapidly turned backwards, or raised respectively,
by means of a key applied to the spindle after first taking off the cover of the oil
chamber, then unfastening a pin whereby the worm is secured, and finally placing
the worm itself out of engagement with the worm wheels. The operation of
throwing the worm out of gear with the wheels may be further simplified by
adopting an arrangement whereby the shaft and worm together may be slightly
displaced in axial direction.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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 relates to an automatic lubricator for the bearings of shafts
and trunnions (or journals) and the object of the invention is to provide a
lubricator, which is simple in construction, efficient in use and particularly
adapted to stir up and to intimately mix lubricants of different kinds for instance
graphite and oil.
With this end in view the present invention consists in certain novel features
of construction and combinations of parts as will be hereinafter fully described
with reference to the accompanying sheet of drawings, whereon.
Figure 1 is a vertical section of the lubricator;
Figure 2 is a top view of the same as it appears after the removal of the top
cover;
Figure 3 is a vertical section of the lubricator takes at right angles to the
section shown by Figure 1; and
Figure 4 is a horizontal cross section of the lubricator on the line 4-4
(Figure 3).
Figure 4 is a horizontal cross section of the lubricator on the line 4--4
(Figure 3).
The improved lubricator mainly consists of an oil chamber a provided at the
bottom with an outlet a¹, an inner displacing piston b, a mechanism for moving
such piston, and a stirring device.
The piston is suspended from a screw-spindle passing through two worm-
wheels placed one over or upon the other. Both these wheels operate in
conjunction with the worm d and are held or secured in the upper part of the
oil chamber a against axial displacement. The two worm wheels, though alike
as regards their pitch circles or rims, do not possess quite the same number of
teeth, one wheel e, having, say, 40 teeth, and the other wheel, 41 teeth. The
wheel having the larger number of teeth and consequently the smaller pitch of
the two. is joined with the spindle of the piston by means of a groove and tongue,
while the other wheel is fitted to the spindle by means of inner screw-thread.
The difference in the pitch of the two wheels are so slight, that both are capable
of co-operating with the same worm, even though the mutual gearing is noi
strictly accurate. The outwardly projecting spindle d of the worm d carries

page_text: any suitable driving gear, such, for example, as a cord wheel or grooved
pulley da, which is set in motion when the lubricator is required to operate; by
the revolution of the said pulley motion is also imparted to the worm-gearing,
which causes the piston b to revolve and at the same time to perform a very slow
downward feeding movement, owing to the fact that the screw spindle is
slightly held back and rotated in the inner screw-thread of the worm wheel c¹
by the other worm-wheel . By such means the lubricating oil is conveyed
to the bearing through the outlet tube a¹ in a very gradual manner.
With the rotary piston b there is combined a stirring appliance, which, in one
arrangement shown by Figure 1 consists of a central tube e with stirring arms e¹,
while, in another arrangement represented by Figure 5 it comprises a series of
tubes arranged unsymmetrically about the axis of the piston. The central
tube e (Figure 1) is, guided through a central channel provided in the piston,
whilst the unsymmetrically arranged tubes f (Figure 3) extend through the
piston itself. Perforations are made in the walls of the tubes e and f respectively,
so that a lubricant, such as graphite (or plumbago) placed in the tubes may mix
with the oil contained in the chamber a; if required the tubes f may be replaced
by solid bars or the like.
By the time the piston has reached the lower end of its stroke, its spindle
has left the inner screw-thread of the worm-wheel cl, so that the worm-gearing,
which continues in motion, does not depress the piston further. In order to
restore the piston to its raised position, it is necessary to apply a certain degree
of upward pressure to the screw-spindle so, that, when the worm-wheel
rotated backwards, it may come into engagement with the inner serew-thread
and may be raised by the reversed rotation of the worm-wheel c'.
is
This upward pressure is produced by the buoyancy of the wood or hollow
piston in the oil, and may, if necessary be assisted by suitable springs g. The
worm wheel and the piston may be rapidly turned backwards, or raised respec-
tively by means of a key applied to the suitably shaped upper end of the
spindle after first taking off the cover a² of the oil chamber, then unfastening
a pin d, whereby the worm d is secured, and finally placing the worm itself out
engagement with the worm wheels. The operation of throwing the worm out
of gear with the wheels may be further simplified by adopting an arrange-
ment whereby the shaft and worm d together may be slightly displaced in an
axial direction.
of
In spite of its relatively very slow downward-motion the piston will yet be
enabled by its quicker rotary motion to operate the stirring device in a satis-
factory manner in order to have the lubricant or lubricants leaving the outlet,
properly and thoroughly mixed.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is:-
In an automatic lubricator the combination of a suitable oil chamber with
outlet, a pressure-piston therein to which is imparted by suitable means a slow
downward motion and a relatively quick revolution about its axis, and of stirring
devices (tubes bars springs and the like) passing wholly or partially through the
said piston, substantially as and for the purpose set forth.
Dated this 19th day of t 1900
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.