IMPROVEMENTS IN LOOSE PULLEYS FOR SHAFTS
Year: 1884

page_text: I, HERBERT JOHN HADDAN, of 67, Strand, in the City of Westminster, Civil
Engineer, do hereby declare the nature of said invention for IMPROVEMENTS IN
LOOSE PULLEYS FOR SHAFTS, a communication to me from abroad by John
McCaffrey and Charles Henry Smith both of 76 State Street, Boston, United
States, Manufacturers, to be as follows:-
The invention consists of a loose pulley provided with an oiling chamber
furnished on its inner surface with ribs or projections and encompassing its hub
eye and opening therein; such chamber having one or more lateral inducts, and a
tapering guide, and an annular flange arranged therewith all being substantially
as set forth.
In accordance with this improvement, the loose pulley is provided with an oiling
chamber encompassing the eye of the hub of the pulley and opening therein and
furnished with one or a series of inducts, for supplying it, the said chamber, with
oil or a lubricating fluid. Furthermore, there is projected from such chamber or
the part containing it, a tapering guide, and a flange encompassing such guide, the
induct or inducts for the passage of the oil into the chamber being between the
said guide and flange. Within the chamber there are one or more radial or other
proper shaped ribs or projections to prevent or hinder the oil from revolving in the
chainber relatively thereto. Such ribs may be curved in a manner to intercept
the oil while the pulley may be in revolution and force it toward the eye of the
pulley, and prevent it by centrifugal force from being packed at the circumference
of the chamber.
The annular flange serves to intercept the oil and direct it into the induct or
inducts. Without the flange the oil would be thrown off the hub or part in which
the chamber is formed, without passing, into the chamber.
With this invention the loose pulley while in revolution, can be supplied with
oil, and need not be stopped for such purpose, it being only necessary to pour the
oil upon the tapering guide, which with the encompassing annular flange, will
direct such oil to the inducts of the chamber and cause it to flow through them
into the said chamber.

page_text: .
Figure 2 a transverse section, and
Fig. 3 a longitudinal section of a loose pulley provided with this invention, the
nature of which is defined in the claim or claims hereinafter presented.
In the said Figures, the said invention is represented as integral with the pulley,
but in the Figures 4 and 7, which are transverse sections of a loose pulley, the
invention is represented as constructed separately from and fixed to the pulley.
Figs. 5. and 6 being side views of it.
In accordance with this improvement, the loose pulley is provided with an
oiling chamber, encompassing the eye of the hub of the pulley and opening therein
and furnished with one or a series of inducts for supplying it, the said chamber
with oil or a lubricating fluid. Furthermore there is projected from such chamber
or the part containing it, a tapering guide, and a flange, encompassing such guide,
the induct or inducts for the passage of the oil into the chamber being between the
said guide and flange. Within the chambers there are one or more radial or other
proper shaped ribs or projections to prevent or hinder the oil from revolving in
the chamber relatively thereto. Such ribs may be curved in a manner to intercept
the oil, while the pulley may be in revolution and force it toward the eye of the
pulley and prevent it by centrifugal force from being packed at the circumference
of the chamber.
In the drawings, A denotes the loose pulley, of which a is the hub and b the
cylindrical eye thereof for receiving the shaft, on which the pulley is to run.
In Figures 1, 2 and 3, the oiling chamber is shown at C as formed within the
hub or as integral therewith, and around and opening directly into 'the eye b, and
provided with a series of lateral inducts c, extending into it from a conical or
tapering surface or guide d, formed on and around the hub in manner as
represented. Besides the said guide, the oiling chamber is furnished with an
annular flange e, which is concentric with the guide and the series of inducts, or is
arranged therewith as represented. When the pulley may.be in revolution on the
shaft, if oil be poured upon the guide, such oil will be caused by centrifugal force
to pass up the guide and into the annular space between it and the flange, and
thence through the induct or inducts into the lubricating chamber, which is
shown as having on each of its inner opposite sides a series of radial ribs or
projections f
=
The annular flange serves to intercept the oil and direct it into the induct or
inducts. Without the flange the oil would be thrown off the hub or part, in
which the chamber is formed, without passing into the chamber.

page_text: In Fig. the oiling vessel or chamber is shown as made separately from and
screwed upon the hub of, the pulley, and held by a check screw g from revolving
in the hub independently thereof..
In Figure 7, the oiling vessel or chamber is represented as made separate from
the hub, and in two parts 8. t, the part a being first secured to the hub and
adjusted into concentricity therewith by four tubular screws h, the part t being
screwed on the part 8, as shown at u.
With this invention the loose pulley while in revolution, can be supplied with
oil, and need not be stopped for such purpose, it being only necessary to pour the
oil upon the tapering guide, which, with the encompassing annular flange, will
direct such oil to the inducts of the chamber and cause it to flow through them
into the said chamber.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare, that what
I claim, is
A loose pulley, provided with an oiling chamber, furnished on its inner surface
with ribs or projections and encompassing its hub eye and opening therein: such
chambers having one or more lateral inducts, and a tapering guide, and an annular
flange arranged therewith; all being substantially as set forth.