IMPROVEMENTS IN THE APPARATUS APPLIED TO THE WHEELS OF LOCOMOTIVE, TRACTION, AND OTHER CARRIAGES TO FACILITATE THE DRAUGHT
Year: 1859

page_text: PROVISIONAL SPECIFICATION left by James Boydell at the Office of
the Commissioners of Patents, with his Petition, on the 18th April
1859.
I, JAMES BOYDELL, of Gloucester Crescent, Regent's Park, do hereby declare
the nature of the Invention for "IMPROVEMENTS IN THE APPARATUS APPLIED TO
THE WHEELS OF LOCOMOTIVE, TRACTION, AND OTHER CARRIAGES TO FACILITATE THE
DRAUGHT," to be as follows:-
This Invention has for its object improvements in the apparatus applied to
the wheels of locomotive, traction, and other carriages to facilitate the draught.
For these purposes the wheels are made with flanches on each side or with
grooves on their peripheries, and they are caused to run on portions of rails
carried by bearing plates or surfaces which are separate from each other, but
connected with their wheels in such manner that as the wheels revolve, the
bearing plates are lifted, carried round by the wheels, and deposited in
succession in front of their respective wheels in a similar manner to what has
been described in the Specifications of previous Patents granted to me.
In the present arrangement, the apparatus for connecting the bearing plates
or surfaces with a wheel, is applied on both sides of a wheel, as was described
in the Specification of the Patent granted to me on the 29th August 1846,
but the form of the bearing plates or surfaces, and the apparatus used to
connect them to the wheels, are different from the corresponding parts shown
and described in the Specification. of that Patent, and these parts are made

page_text: more similar to those described in the Specification of the Patent granted to
me and dated the 22nd February 1854. In the present arrangement each
bearing plate or surface is made with a portion of a rail thereon, and one
end of such rail projects beyond the central portion of the bearing plate,
but the sides of the same end of the bearing plate or surface project as far as
or further than the end of the rail, so as to receive the opposite or back end of
the next bearing plate or surface between the two front projecting portions of
the sides of the bearing plate which for the time is under the wheel, and such
hinder end of the next bearing plate or surface is formed with two projections,
which on taking the ground, come on either side of the portion of rail which
projects beyond the central portion of the previous bearing plate. The portion
of rail which is fixed on each bearing plate or surface only comes to the
point at the back end of the bearing plate or surface where the portions which
project commence or extend beyond the main surface of the bearing plate.
There are in this arrangement two sets of guide plates similar to what were
described in my last-mentioned Specification, one set on each side of a wheel,
and there are also two sets of what are called triangular bars which work
through the guide plates, two sides of each of these triangles are formed with
curved or cycloidal bars such as are now applied to my traction engines, and
they are attached to their bearing plates or surfaces in such manner as to be
capable of moving somewhat to and fro, and in the present arrangement these
bars are used and connected together in pairs at their upper ends, so that in
rocking to and fro both go together.