Improvements in Loose Pulley Lubricators.
Year: 1891

page_text: Date of Application, 16th Apr., 1891-Accepted, 23rd May, 1891
COMPLETE SPECIFICATION.
Improvements in Loose Pulley Lubricators.
I, EDWARD Clarence MillER, of 75 Queen Victoria Street, City of London,
Manufacturer, do hereby declare the nature of this invention which has been com-
municated to me from abroad by Henry Lawrence Miller of 41 Traders Building,
Chicago, United States of America, Manufacturer, and in what manner the same
s to be performed to be particularly described and ascertained in and by the
following statement:-
This invention relates to certain improvements in loose pulley lubricators.
As loose pulleys require a large amount of almost constant lubrication, and are
sometimes located in almost inaccessible places it is the object of this invention to
provide an improved lubricator for loose pulleys exceedingly simple, cheap, and
durable in construction, and which can be attached to the hub of the pulley and
rotate therewith with its larger cup end facing the direction of the pulley's rotation
and which allow a free constant flow of the lubricant to the bearing.
These objects are accomplished by, and this invention consists, in certain novel
features of construction and in combination of parts more fully described herein-
after and particularly pointed out in the claims."
Referring to the accompanying drawings,
Figure 1 is an elevation, and Figure 2 is a central vertical section of the
lubricator.
Figure 3 is an elevation of a pulley with cup attached.
The lubricator consists of a cup a open at the large upper end or top and
provided with an internal screw thread to receive the threaded flange of the
closure or cap 6 which screws into said open end and tightly closes the same.
This cap is provided with a nut c, or-other means whereby the cap can be turned.
The cup tapers downwardly and has its lower small end bent laterally into a
plane substantially at right angles to the longitudinal axis or length of the cup,
and said end is preferably solid and provided with a duct d for the passage of the
lubricant to the bearing and also is externally threaded, as shown, to screw into the
hub to the bearing and has the enlarged or angular portion e, whereby the cup can
be turned by a suitable tool.
A plug or other valve is located in said lower end of the cup in the duct d to
regulate or cut off the flow of the lubricant.
An air tube g opens through the lower end of the cup into the duct d at the
base of the externally threaded portion of said end and extends up and through the
side wall of the cup a distance from its top and thence upwardly in the interior of
the cup with its upper end / located just beneath the cover or closure of the cup.
This tube is provided with one or more air inlet ports i open to the outer atmos-
phere. As the oil feeds through the tap and duct d into the bearing, air passes
through porti into tube g and through said tube g into the cup above the lubricant
therein, thereby allowing free flow of the lubricant because the constant pressure
Also the air
of air above the same, prevents the formation of a partial vacuum.
flows from the lower end of the tube g into the inner end of duct d, thereby
hastening the outflow of lubricant through said duct.
The cup after being once filled with lubricant will freely oil and lubricate the
5 bearing without requiring attention until the lubricant is exhausted.
The features of the tube y is not limited to use with the peculiarly shaped cup
herein set forth.
Figure 3 shows how the cup is applied to a loose pulley. The cup is screwed
into the hub, or boss of the pulley with its large end or mouth facing in the
O direction of rotation of the pulley. When the pulley rotates at a high rate of

page_text: speed, the oil does not collect in the outer corner of the cup, as it does where the
cup is straight but by reason of centrifugal force and the peculiar shape and
contour of the cup, the oil lies against the outer curved side or bend, and is guided
or forced thereby down through duct d, so that the outflow can be controlled by
valve. The continuous taper and the fact that the outer end of the cup faces
directly in the direction of movement prevents the oil collecting in the end of the
cup, also the apertures i are in the outer side of the tube y and in the direction of
movement, so that air is forced therein.
It is evident that various changes might be resorted to in the form and arrange-
ments and constructions of the parts described without departing from the spirit
and scope of this invention, hence it is not wished to limit the invention to the
exact construction herein set forth.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A closed lubricator cup, having the tube with its opposite open ends opening
respectively into the outer portion of the interior of the cup and the oil discharge
duct from said cup, and extending through the outer atmosphere, and provided with
an air inlet opening.
2. The bent oil cup, having the open tube extending from its outer interior
through its side wall and exteriorly of the cup into its lower discharge end, having
the air vent, as and for the purposes set forth.
3. As an article of manufacture, the herein described oil cup having the enlarged
outer end provided with a closure, and tapering downwardly to its small lower end
formed to enter the bearing, and having the contracted discharge duct and valve,
said cup being curved laterally, so that its lower end extends laterally substantially
at a right angle, whereby the large end of the cup faces in the direction of rotation
when in use, for the purposes set forth.
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H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Edward Clarence Miller.