Improvements in Belt Pulleys.
Year: 1890

page_text: Date of Application, 25th June, 1890
Complete Specification Left, 21st Mar., 1891-Accepted, 25th Apr., 1891
Improvements in Belt Pulleys.
I, NORMAN FRASER, of Wellgate Works, Arbroath, in the County of Forfar
North Britain, Engineer, do hereby declare the nature of this invention to be as
follows, that is to say :-
My said invention has for its object to improve the construction of belt pulleys;
and it is applicable to pulleys of various sizes and forms, with cylindrical, or convex,
or conical rims.
In carrying out my invention I make the pulley rims of wrought iron or steel
with the edges bended round and inwards, such rounded edges giving increased
strength, facilitating the placing of a belt on the pulley, and being less liable to
catch or cut a belt hanging at the side of the pulley. The nave of the pulley may
be made of any suitable known form or material. The arms or spokes are made of
wrought iron, or steel, or malleable cast iron; and their outer-ends are split to
form two or more curved branches to which the pulley rim is riveted. There may
be two or more sets of arms or spokes when the width of the pulley rim renders this
desirable, the separate sets of arms or spokes being fixed to one or more naves.
Dated this Twenty-fourth day of June 1890.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Belt Pulleys.
I, NORMAN FRASER, of Wellgate Works, Arbroath in the County of Forfar,
North Britain, Engineer, 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, that is to say :-
My said invention has for its object to improve the construction of belt pulleys;
and it is applicable to pulleys of various sizes and forms, with cylindrical, or convex
or conical rims.
In carrying out my invention I make the pulley rims of wrought iron or steel
with the edges bended round and inwards. The nave of the pulley may be made
of any suitable known form or material. The arms or spokes are made of wrought
iron, or steel, or malleable cast iron; and their outer ends are split to form two or
more curved branches to which the pulley rim is riveted. There may be two or
more sets of arms or spokes when the width of the pulley rim renders this
desirable, the separate sets of arms or spokes being fixed to one or more naves.
Parts of two examples of my improved pulleys are shown in section on an
accompanying sheet of explanatory drawings.
In the modification shown in Figure, 1, the rim, R, is cylindrical and has the
edges, E, bended round and inwards so as to be at right angles to the rim, R, such
rounded edges, E, giving increased strength, facilitating the placing of a belt on
the pulley, and being less liable to catch or cut a belt hanging at the side of the
pulley. The outer ends of the arms or spokes, (of which only part of one, S, is
shown in Figure, 1,) are split to form two curved branches, B, to which the pulley
rim, R, is fixed by means of rivets, C.
In the modification shown in Figure, 2, the edge, E, of the rim, R, is bended
round and turned completely inwards.

page_text: 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 a belt pulley having a rim of wrought iron or steel bending the edges of
the rim and making the outer ends of the arms or spokes with two or more branches
to which the rim is riveted substantially as and for the purposes hereinbefore
described.
2 In a belt pulley having a rim of wrought iron or steel bending the edges of
the rim round and inwards substantially as and for the purposes hereinbefore
described.
3. In belt pulleys making the outer ends of the arms or spokes with two or more
branches to which the rim is riveted substantially as and for the purposes herein-
before described.
1f Mauch 1901
EDMUND HUNT,
Applicant's Agent.