Improvements in Jointing-plates for Split Pulleys.
Year: 1889

page_text: Date of Application, 7th June, 1889
Complete Specification Left. 7th Feb., 1890-Accepted, 8th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Jointing-plates for Split Pulleys.
WILLIAM THOMLINSON-WALKER Engineer Victoria Iron Works, York County of
York, I do hereby declare the nature of this invention to be as follows:-
An improvement in the jointing plates or strips for connecting at the rim the two
halves of a split pulley, which I make preferably of wrought iron with the exception
of the boss or hub which is of cast metal.
My improvement consists in rivetting to each of the halves of the rin at their
respective joints, plates or strips which I preferably make of cast steel, these said
plates when rivetted on become part of the rim to all intent.
These plates are made of such a shape, that when the two halves of the pulley are
bolted together at the hub or boss, the aforesaid plates dovetail into each other thus
taking up all the side strains at the rim joints and also greatly relieving the pulling
strain.
Through the width of the jointing plates or strips a taper hole is drilled through
which a taper pin or bolt is passed. When this bolt or pin is tightened up by means of
a nut on its screwed part the two aforesaid dovetailed jointing plates or strips are
sprung together.
To open the pulley at the rim for its removal from its shaft or spindle the nut on
the taper pin or bolt has merely to be removed and the pin or bolt driven out, the
dovetailed plates thus being released, spring back and the joint is open.
Dated this the 6th day of June 1889.
WILLIAM THOMLINSON-WALKER,
Victoria Iron Works, York, County of York.
COMPLETE SPECIFICATION.
Improvements in Jointing-plates for Split Pulleys.
WILLIAM THOMLINSON-WALKER Engineer Victoria Iron Works York County of
York I 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 consists of an improvement in the Jointing plates or strips for
connecting the two halves of a Split Pulley which pulley I make preferably of
wrought iron with the exception of the boss or hub which is of cast metal.
My invention consists in rivetting to each of the halves of the rim at their respective
joints plates or strips which I preferably make of cast steel these said plates when
rivetted on become part of the rim to all intent.
These plates are made of such a shape that when the two halves of the pulley are
bolted together at the hub or boss the aforesaid plates dovetail into each other thus
taking up all the side strains at the rim and greatly relieving the pulling strain.
Having thus stated the nature of my Invention I proceed in order that my invention
may be more fully and more clearly understood to explain the same with the aid of
the accompanying Sheet of Drawings which form part of this specification, reference
being made thereto by the numerals and letters marked thereon and which reference
applies to each figure of the said Drawing where the same index numerals and letters
appear.
Fig. 1 is a side elevation of my Joint showing it attached to the two halves of
the rim, showing how the split portion of the Joint is forced open by means of
the tanar halt on stud

page_text: Fig. 2 shows a plan when the Joints are connected and the split portion is forced
open, filling the dovetail portion on the other half of Joint.
Fig. 3 shows the end elevation of the Joint and gives its general appearance
Fig. 4 shows a plan of the Joint when released and the split portion as regained
its normal or natural position when the taper bolt is withdrawn.
A is the split portion of Joint showing same pulled up into its position in the
dovetailed half B by means of the taper bolt or stud C. DD shows two halves
of a rim drawn together by means of the Joint.
A shows the split portion of the Joint in its natural position when released by
the bolt C being withdrawn.
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:
Firstly a Joint in two halves, the boss or bearing of the one being split and
the other being recessed the said recess being slightly dovetailed.
Secondly the forcing into the dovetailed portion of the split half and the opening
of same by means of a tapered bolt or stud.
In witness whereof I the said William Thomlinson-Walker have hereunto set
my hand and seal this Sixth day of February One thousand eight hundred
and ninety.
WILLIAM THOMLINSON-WALKER.