Improvements in and relating to Wrought Iron and Steel Pulleys.
Year: 1894

page_text: Date of Application, 23rd Apr., 1894
Complete Specification Left, 23rd Jan., 1895-Accepted, 23rd Feb., 1805
PROVISIONAL SPECIFICATION.
Improvements in and relating to Wrought Iron and Steel Pulleys.
We, ROBERT BOWMAN DAVIDSON Engineer and BARRY, HENRY, AND
COMPANY, LIMITED, Ironfounders, both of Aberdeen Iron Foundry, in the.
City and County of Aberdeen, do hereby declare the nature of our invention to
be as follows:-
This invention consists in an improved method of fixing the arms to the rims of
wrought iron or steel pulleys, doing away with the necessity of having the arms
screwed right and left hand, and thus simplifying and cheapening the cost of
inanufacture.
According to our improvements we attach the arms to the rim of the pulley by
means of a bracket inside of which is placed a liner or ferrule. This liner is
firmly attached to the bracket while free to turn round. The liner is screwed on
the inner side to fit the outer end of pulley arm, and the pulley arm is screwed to
correspond.
Thus by turning the inner liner when fitting up the pulley, the rim can be trued
up or adjusted when necessary without having to move the arm, thus obtaining a
stronger and better finished pulley.
2
A 1201
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating
We, ROBERT BOWMAN DAVIDSON, and BARRY, HENRY AND COMPANY
LIMITED, Ironfounders, both of Aberdeen Iron Foundry, in the City and County
of Aberdeen, do hereby declare the nature of our invention, and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement in writing, that is to say :-
This invention consists in an improved method of fixing the arms to the rims of
wrought iron or steel pulleys doing away with the necessity of having the arms
screwed right and left hand, and thus simplifying and cheapening the cost of
manufacture.
And in order that our said invention and the manner of performing or carrying
the same into effect or practice may be properly understood we have hereunto
appended an explanatory sheet of drawings in which Figure 1 is a side elevation
and Figure 2 a transverse section of a pulley as fitted in accordance with our
improvements. Figure 3 is a section and Figure 4 an end view of our tightening
up bracket and liner; and Figures 5 and 6 are views corresponding to Figures 3
and 4, but the latter inverted, showing a modified way of securing the liner within
bracket, while still giving it freedom to turn within same.
Referring to the drawings:-According to our improvements we attach the
arms A to the rim B of the pulley by means of a bracket C inside of which is
placed a liner or ferrule D. This liner D is securely attached to the bracket C,

page_text: such as shown in Figures 3 and 4, by the flange D', formed on it after insertion
within the bracket C, or by means of the screw nut c, with locking pin c¹, as shown
in Figures 5 and 6; and this liner D is free to turn round within the hollow
bracket C. The liner D is screwed at D' on the inner side to fit the outer end of
pulley arm A and the pulley arm A is screwed at A' to correspond.
Thus by turning the inner liner D when fitting up the pulley, the rim B can be
trued up or adjusted when necessary without having to move the arm 'A, thus
obtaining a stronger and better finished pulley.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
First. In wrought iron and steel pulleys, the fitting of an inner liner, ferrule, or
like organ within a bracket between pulley rim and end of arms, substantially
as herein described in reference to and shown in the accompanying drawings.
Second. In wrought iron and steel pulleys, the combination comprising outer
rim, hollow or socket bracket secured to said rim, liner or ferrule fitted loosely
within said bracket, and radial arms with screwed ends working within screw
threaded surface of liner, so that the rim can be trued up by moving said liner,
substantially as herein described in reference to and shown in the accompanying
drawings.
Dated the 22nd January 1895.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.