A New or Improved Mechanical Lubricator.
Year: 1895

page_text: Date of Application, 28th Sept., 1895-Accepted, 2nd Nov., 1895
COMPLETE SPECIFICATION.
A New or Improved Mechanical Lubricator.
I, EDWARD GRIFFITH BREWER of 33 Chancery Lane in the County of
London, and 30 East Parade, Leeds, in the County of York, Fellow of the
Chartered Institute of Patent Agents, do hereby declare the nature of this
invention (a communication to me from abroad by the Firm of Gebreuder Stern
of 160 Luxemburger Strasse, Cologne, in the Empire of Germany, Vaseline, Oil
and Grease Manufacturers,) and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement :-
This invention refers to a new or improved mechanical lubricator applicable for
the lubrication of bearings generally, whatever the construction of such bearings
may be.
The invention will be best understood by describing same with reference to the
accompanying drawings. Figure 1 is an end elevation, Figure 2 is a vertical
sectional elevation, and Figure 3 is a plan of a mechanical lubricator constructed
according to my invention.
Similar letters of reference refer to like parts in all the figures.
The mechanical lubricator is composed essentially of the following parts.
1. A grease box or receiver A, wherein the lubricant is placed, below a piston C,
which latter is carried by a screw throaded rod V.
2. Of a cover B, provided with an arched crosshead a in which there are
openings e f which act as guides to the threaded piston rod.
3. Of two toothed wheels D and E receiving motion from an endless screw or
worm F which itself has motion communicated to it from the shaft to be lubricated.
The wheel D is threaded like the piston rod, and is screwed on to the latter (piston
rod) like a nut. The other toothed wheel E has a smooth boring and meshes or
gears with the endless screw or worm F. This toothed wheel E is held to the
piston rod by means of a pin or feather g, taking into a slot in the piston rod,
and so that the piston rod V is revolved by the toothed wheel E but has at the
same time free vertical motion. One of the toothed wheels is formed with one or
two less number of teeth than the other wheel, but this difference in the number of
teeth does not prevent the two toothed wheels from being driven by the same
endless screw or worm. This arrangement or construction forms a characteristic
feature in my invention, because from this fact it results that during the rotary
motion of the two toothed wheels a delay or advance is obtained in the one say D
(which is screwed on to the piston rod) and as the toothed wheel D acts as a fixed
nut it will give by this delay or advance an ascending or descending motion to the
rod and consequently to the piston.
The motion of the endless screw or worm F may be obtained as shown at
Figures 2 and 3 by a finger H carried by a collar fixed on the rotary shaft, and
which finger at each revolution of the latter, strikes an arm of a star wheel G on
the worm wheel shaft F, or it may be effected by two pulleys, one on the shaft, the
other on the endless screw or worm shaft, but the transmission of motion may be
effected in any convenient mechanical manner according to the position of the
lubricator or as other circumstances may demand.
Lubricators constructed as before described work or are operated in the following
manner:-
In order to render the description as clear as possible I will suppose that one of
the toothed wheels has 51 teeth, and the other 50 teeth only, that is one tooth less

page_text: than the other. The endless screw or worm F, worked from the shaft itself, will
cause the two toothed wheels to revolve, one of which E, keyed on the threaded
piston rod, will cause the latter to revolve together with the piston, the second
one D, screwed on to the piston rod will revolve with the wheel E but with a
differential motion caused by the difference in the number of teeth, that is to say,
when the feathered toothed wheel E shall have made a revolution, and the
threaded piston rod having completed its revolution, while the toothed wheel D,
which acts as a fixed nut on the rod, has only partly completed one revolution,
there will thus have been caused a displacement of the toothed wheel D on the
screw equal to of the thread. If the thread is of one millemetre, for instance,
it will therefore follow that the rod, and therefore the piston, will have descended
by of a millemetre. The receiver A, being full of lubricant, the descent of the
piston will cause a pressure sufficient to expel the lubricant by the lower aperture
of the grease box or receiver, and force it into the bearing to be lubricated. The
lubrication thus obtained will therefore be regular, economical, and certain in its.
results; its action being entirely mechanical will only continue as long as the shaft
to be lubricated is revolving. The very slow descending movement of the piston,
owing to the differential mechanism of this new or improved lubricator, enables it
to be used for a fairly long time without attention, except to fill the grease box
when it becomes empty.
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. In mechanically acting lubricators, the combination with a grease box or
receiver, of a piston with screw threaded rod and two toothed wheels, having an
unequal number of teeth in each, one such toothed wheel being threaded and
gearing with the screw threaded piston rod, the other toothed wheel having a
smooth boring and held to the piston rod while the latter has free vertical motion,
both toothed wheels being in gear with a worm wheel, receiving motion from the
shaft of the bearing to be lubricated by means of a finger on the shaft striking a
star wheel as it revolves, or by any other suitable mechanical means, whereby a
differential motion is imparted to the two toothed wheels, and a vertical motion to
the piston for mechanically acting on the lubricant, and forcing it into the part
to be lubricated, all substantially as set forth.
2. In mechanically acting lubricators, the two differentially acting gearing
wheels DE for causing the descent of the piston and the forcing of the lubricant
by the combined arrangement of mechanism as described and illustrated with
reference to the accompanying drawings.
3. The new or improved mechanical lubricator constructed arranged, and acting,
substantially as and for the purpose herein before described and illustrated with
reference to the accompanying drawings, together with any mere modification or
modifications thereof.
Dated this 28th day of September 1895.
BREWER & SON,
London and Leeds.