Self-lubricating Loose Pulley.
Year: 1892

page_text: Date of Application. 28th Sept., 1892
Complete Specification Left, 7th Dec., 1892-Accepted, 21st Jan., 1893
PROVISIONAL SPECIFICATION.
Self-lubricating Loose Pulley.
ELLIS CUTLAN Builder Everleigh House Everleigh Street Tollington Park
London N. do hereby declare the nature of this invention to be as follows:-
The pulley is made in parts. The inner part contains the lubricating oil and is
fixed to the shafting or spindle. The outer part revolves and is kept in position by
flanges which act as a collar, packed with asbestos or any other suitable material to
prevent waste of oil.
Dated this Twenty-seventh day of Sentember 1802
COMPLETE SPECIFICATION.
Self-lubricating Loose Pulley.
I, ELLIS CUTLAN, of Everleigh House, Everleigh Street, Tollington Park, in
the County of Middlesex, Builder, 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 loose pulleys and comprises improved means for ensuring
the proper lubrication of the same when running.
The pulley constructed according to my invention is composed of two principal
parts, namely a bush or collar adapted to be fixed to the shaft and having in
conjunction with it reservoirs or compartments for the lubricant, and the pulley
proper which is mounted upon this bush.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figures 1 and 2 are an elevation partly in section and a central section
respectively of a pulley constructed according to my invention:
Figures 3 and 4 are similar views illustrating a modification thereof; and,
Figures 5 and 6 are similar views illustrating another modification.
Similar letters of reference indicate corresponding parts in the several figures.
a is the bush which is adapted to be fixed to the shaft by means of a key c or
by any other suitable means, and d is the loose pulley proper which is mounted
thereon between two flanges e, f; the former of which is cast integral with the
bush whilst the latter is removable and attached to the bush a by screws f, as
shewn or by any other suitable means. 9, 9, 9 are three compartments for containing
the lubricant.
As shewn in Figures 1 and 2 these compartments are represented as being formed
in the body of the bush a and are closed to prevent the escape of the lubricant
therefrom by the flange f, as shewn most clearly in Figure 1, where part of the
said flange is represented as being broken away. In each of the compartments
shewn in Figures 1 and 2 is placed a tube extending to the outer surface of the
bush a and having passed through it a piece of cotton wick or other suitable
material for syphoning the oil from the compartment g. Suitable passages j, j are
formed in the flange for introducing the lubricant into the compartments,
screws k, k being provided for closing the apertures through which the com-
partments are filled.
In the arrangement shewn in Figures 3 and 4 the compartments 9, 9 are enlarged
or extended by forming them partly in the body of the bush and partly in the
flange e which, in this case, is made larger than shewn in Figure 2, the oil being

page_text: conveyed to the surface to be lubricated by means of wicks i, i. In this modifica-
tion the compartments are closed on the outside by means of a cap e' and the
lubricant is introduced through holes which are normally closed by screws 1, 1.
The arrangement shewn in Figures 5 and 6 is similar to that shewn in Figures 3
and 4 except that instead of forming the compartments partly in the flange e I
attach lubricating cups m, m to the said flange.
The manner in which the lubrication takes place is as follows:-that is to say,
as there are arranged in conjunction with each bush a several compartments 9, 9 or
cups m, m containing lubricant it follows that, when the shaft b to which the bush a
is secured ceases to run by moving the belt onto the loose pulley, one or other of
the said compartments will always be in such a position that its wick will act to
convey the lubricant to the surface to be lubricated when, however, the shaft >> is
rotated, owing to the belt being upon the fast pulley, the bush a will also rotate,
whereby the centrifugal action will counteract the syphonage of the wicks and so
prevent the oil from being delivered to the surface between the bush and the
pulley and thereby wasted.
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. A loose pulley having a central bush adapted to be fixed to the shaft and to
have the pulley proper rotate thereon, the said bush being adapted to contain a
lubricant, substantially as described.
2. A loose pulley having a central bush upon which it rotates, the said bush
having compartments for a lubricant formed within it, substantially as described
with reference to Figures 1 and 2 of the drawing.
3. A loose pulley rotating upon a central bush having a flange or collar in or
upon which compartments or cups are formed or fixed, the said compartments
forming extensions or enlargements of the compartments within the bush, substan-
tially as described with reference to Figures 3 and 4, and 5 and 6 of the
accompanying drawing.
Dated this 7th day of December 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.