Year: 1887

page_text: Date of Application, 8th June, 1887
Complete Left, 8th Mar., 1888
Complete Accepted, 13th Apr., 1888
1, WILLIAM ALEXANDER, of Helen Street, Govan, in the County of Lanark, Block-
maker, do hereby declare the nature of this invention to be as follows:-
My invention relates to sheaves for pulley blocks and the improvements have for
object the better securing of the bearing bushes in such sheaves.
In lieu of the ordinary circular flange upon the end of the bush through which pins
are passed for securing the bush to the sheaf I make the flanged end in the form of
an oval or trefoil or series of united segments of circles and correspondingly bore,
turn or cut the sheaf around the central orifice through which the bush is passed in
order that when the bush is driven in and the flange sunk flush with the side of the
sheaf, it may have such a hold upon the material of which the sheaf is composed as to
prevent the bush turning within it. At the end of the bush opposite to that at which
the flange is situated a washer is fitted over the bush and sunk into the sheat and the
end of the bush is pressed or rivetted over so that the washer retains the bush against
any tendency to slip out of the orifice in which it is fitted. The formation imparted
to the flanged end is such that the recess made for it in the sheaf may be conveniently
bored, turned or similarly machined.
2
11
T
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,.
Agents.

page_text: I, WILLIAM ALEXANDER of Helen Street, Govan, in the County of Lanark,
Blockmaker 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 :-
My invention relates to sheaves for pulley blocks. and the improvements have for
object the better securing of the bearing bushes in such sheaves.
In lieu of the ordinary circular flange upon the end of the bush through which pins
are passed for socuring the bush to the sheaf I make the flanged end A¹ of the bush A
as represented in clevation and vertical section of a sheaf at figures 1 and 2 of the
annexed drawing in the form of a trefoil (or it may be in the form of an oval or of a
series of united segments of circles) and correspondingly bore, turn or cut the sheaf B
around the central orifice 6 through which the bush is passed in order that when the
bush is driven in and the flange A' sunk flush with the side of the sheaf it may have
such a hold upon the material of which the sheaf is composed as to prevent the bush
turning within it.
At the end of the bush opposite to that at which the flange is
situated a washer C is fitted over the bush and sunk into the sheaf, and the end A² of
the bush A is pressed or rivetted over as shown so that the washer retains the bush
against any tendency to slip out of the orifice in which it is fitted. The formation
imparted to the flanged end A' is such that the recess B made for it in the sheaf may
be conveniently bored turned or similarly machined.
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 bush for a pulley block sheaf formed and fitted substantially as herein before
described with reference to the annexed drawings.
T
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.