An Improved Joint Chair for Tramway Rails.
Year: 1892

page_text: Date of Application, 3rd Feb., 1892
Complete Specification Left. 24th Oct., 1892-Accepted, 26th Nov., 1892
PROVISIONAL SPECIFICATION.
An Improved Joint Chair for Tramway Rails.
I, HUGH EDWARD WHYTEHEAD, of The Hermitage, Stoke on Trent,
Staffordshire, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention consists in the herein described improved joint chair for tramway
rails, which is so designed as to enable the nuts of the fish bolts to be tightened up
at any time when required without disturbing any of the sets or other part of the
road pavement.
In a tramway joint chair constructed according to my invention there is a vertical
web (preferably made parallel with the rails) standing up from the base of the
chair a short distance from the nuts on the bolts and to about the level of the
pavement thus forming round the nuts a narrow open topped box or recess the ends
of which are closed. This box or recess furnished with a removable cover about
level with the pavement.
By first lifting this cover the nuts of all the fish bolts are exposed to view and
they can readily be tightened up by a spanner when required.
Dated this 30th day of January 1892.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Joint Chair for Tramway Rails.
I, HUGH EDWARD WHYTEHEAD, of The Hermitage, Stoke on Trent,
Staffordshire, 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:-
This invention consists in the herein described improved joint chair for tramway
rails which is so designed as to enable the nuts of the fish bolts to be tightened up
at any time when required without disturbing any of the sets or other part of the
road pavement.
In a tramway joint chair constructed according to my invention there is a vertical
web or wall (preferably made parallel with the rails) standing up from the base of
the chair a short distance from the nuts on the bolts and to about the level of the
pavement thus forming round the nuts a narrow open topped box or recess the ends
of which are closed. This box or recess is furnished with a removable cover about
level with the pavement.
On the accompanying drawings
Fig. 1 is a cross sectional elevation of one form of my improved joint chair made
of cast metal ;
Fig. 2 is a part sectional side elevation of the same taken on line X X of Fig. 1
and
Fig. 3 is a plan of the same with the cover shewn partly in section.
Fig. 4 is a cross sectional elevation of another form of my improved joint chair
made of wrought iron or steel;
Fig. 5 is a sectional side elevation of the same taken on line Y Y of Fig. 4, and
Fig. 6 is a sectional plan of the same;
Fig. 7 is a cross sectional elevation of another form of my invention ;

page_text: Fig. 8 is a cross sectional elev tion of the same taken on line Z Z of Fig. 7,
and Fig. 9 is a sectional plan of the same.
The same letters of reference indicate the same parts in all the figures.
Referring firstly more particularly to Figs. 1, 2, and 3 A is the tramway joint
chair supporting the rails B1 B2 and securing them together by the bolts C in the
usual way. D is the vertical web or wall which in this example of my invention is
cast with the chair a short distance from the nuts c on the bolts C so as to form the
narrow open topped box or recess E round the nuts. The ends of the box or
recess E are closed by any convenient means as by the webs d' d' or by the sets or
other pavement so as to prevent dirt accumulating in the box or recess E. F is the
removable cover of the box or recess E, preferably made of a rolled chequered
bar, resting in a rebate a near the top of the chair A. and webs D ²; or the
removable cover F may be made in any other convenient manner so as to close, the
box or recess E.
By first lifting this cover F the nuts of all the fish bolts C are exposed to 1
view and they can readily be tightened up by a spanner when required.
In the example of my invention shewn by Figs. 4, 5 and 6 the joint chair
consists of a piece of angle section bar of iron or steel, forming the base a² of the
chair and the vertical web or wall D and to this latter at the proper distance
therefrom so as to leave room for the nuts-c as shewn is fixed by the rivets G or by
bolts or other means the fish plate a³. dd² are pieces of angle iron rivetted to the
web or wall D to carry the cover F.
In the further modification of my invention shewn by Figs. 7, 8 and 9 the joint
chair is (as in the example shewn by Figs. 4, 5 and 6) partly formed of a piece of
angle section bar of iron or steel, forming the base a2 of the chair and the vertical 2
web or wall D and to this latter is fixed by the rivets the fish plate part at which
in this case is or may be of cast metal and has the bosses a³ formed upon it through
which the rivets h pass these bosses a being situated between the bolts C and made
deep enough to form the open topped box or recess E for the nuts. These bosses
are by preference produced to the top of the chair as shewn for the cover F to 3
rest upon.
The accompanying drawings shew what I consider to be the best way of carrying
my invention into practice but I wish it to be understood that I do not limit myself
to the precise forms of the chair shewn as it will be evident that the same may
be varied without departing from the nature of my invention.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I declare that what I claim is :-
3
The herein described improved joint chair for tramway rails made with a
narrow open topped box or recess for the nuts of the bolts which secure the rails
to the chair, and either with or without a removable cover for the box or recess, 4
substantially as hereinbefore described.
Dated this 20th day of October 1892.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.