NEW PERFORATED FIRE-BARS APPLICABLE TO LOCOMOTIVE AND STEAM BOILERS
Year: 1870

page_text: LETTERS PATENT to Frederick Broughton, of No. 3, Hanover Cottage,
Regent's Park, in the County of Middlesex, Railway Contractor,
for the Invention of "NEW PERFORATED FIRE-BARS APPLICABLE TO
LOCOMOTIVE AND STEAM BOILERS,”
PROVISIONAL SPECIFICATION left by the said Frederick Broughton
at the Office of the Commissioners of Patents, with his Petition, on
the 11th May 1870.
I, FREDERICK BROUGHTON, of No. 3, Hanover Cottage, Regent's Park,
in the County of Middlesex, Railway Contractor, do hereby declare the
nature of the said Invention for "NEW PERFORATED FIRE-BARS APPLICABLE TO
LOCOMOTIVE AND STEAM BOILERS," to be as follows:-
My Invention consists,-
Firstly. In the fire-bars being perforated so as to permit the free
passage of air through the bars, by which means they are constantly
kept cooled, thereby preventing clinker or dross adhering to the bars,

page_text: also preventing the burning, wear, and destruction of the bars through
heat, and affording facility for the proper cleansing of the bars.
Secondly. The perforations in the bars being in slanting and opposite
directions to each other, as shewn by Figures 1 and 2 on the Drawing
Sheet 1, the free passage of air through the bars to engines running
short journies is obtained without the engines being turned, and the
bars are thus kept constantly cool in whichever direction the engine
may be running.
Thirdly. In cases where engines travel a considerable distance and
are turned for return journies, engines foremost. The perforations in
the bars can be constructed as shewn by Figures 3 and 4 on the Drawing
Sheet 2, whereby a greater current of air in ratio of 2 to 1 to that
obtained by the slanting perforations in opposite directions is obtained,
and the bars are kept constantly cooled by the perforations being all in
one direction instead of opposite directions, as shewn by Figures 1:
and 2.
Fourthly. The perforated fire-bars having a double current of air any
quantity of steam can be originated, and the perforated bars being closer
together than the ordinary fire-bars the fuel cannot escape and its
consumption is considerably less."
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Frederick Broughton in the Great Seal Patent
Office on the 10th November 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
BROUGHTON, of No. 3, Hanover Cottage, Regent's Park, in the County
of Middlesex, Railway Contractor, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by. Her
Letters Patent, bearing date the Eleventh day of May, in the year of
our Lord One thousand eight hundred and seventy, in the thirty-third
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Frederick Broughton, Her special licence that
I, the said Frederick Broughton, my executors, administrators, and
assigns, or such others as I, the said Frederick Broughton, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein

page_text: .
quantity of steam can be originated, and the perforated bars being close
together than the ordinary fire-bars the fuel cannot escape, and its
consumption is considerably less.
"
Fig. 3 shews plan of Fig. 1°.
Fig. 4 and 5 are plans of Figs. 1 and 2, showing the position of bars
when placed in the fire-box.
Fig. 6 an end elevation and Fig. 7 a section of centre of fire-bar,
Fig. 1. .
A (see Figs. 1 and 2) represents front of fire-box near tubes, and B
the back of same.
Having now described the nature of my said Invention, and the mode
of carrying the same into effect, what I claim and desire to be secured
to me. by Letters Patent is, the Invention for "New Perforated Free-bars
applicable to Locomotive and Steam Boilers," substantially as herein
described and as shewn on accompanying Drawings, or any mere
modification thereof.
In witness whereof, I, the said Frederick Broughton, have here-
unto set my hand and seal, this Tenth day of November, in the
year of our Lord One thousand eight hundred and seventy.
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