nAUDYDYMO IN BUONA ORS AND IN THEIR FITTINGS
Year: 1875

page_text: LETTERS PATENT to Thomas Snowdon, of 40, Great Russell Street,
Bloomsbury, in the County of Middlesex, Engineer, for the
Tion f is TennAUDYDYMO IN BUONA ORS AND IN THEIR FITTINGS
"
Scaled the 4th April 1876, and dated the 13th October 1875.
PROVISIONAL SPECIFICATION left by the said Thomas Snowdon at
the Office of the Commissioners of Patents, with his Petition, on
the 13th October 1875.
I, THOMAS SNOWDON, of 40, Great Russell Street, Bloomsbury, in
the County of Middlesex, Engineer, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN FURNACES AND IN THEIR FITTINGS,"
to be as follows:-
This Invention relates to improvements in furnaces and in their
fittings, and consists in forming the under side of furnace bars with a
couple of hook-like lips or lugs, into which projections on a cross bar
as a bearing and rocking bar are caused to engage. The hook lips or
lugs of each bar look towards each other, so that when the cross bar or

page_text: bars is or are inclined in either direction they pull that end of the
bars to which they are attached or fitted downwards, the opposite end
going up under the action of one or more levers, which can be worked
from the outside by suitable appliances or by hand. Each transverse
bar has the projections in alternate order on each side, with spaces or
openings to enable the bar ends which are being lowered to take into
them the projections, at the same time raising the ends of the other
bars, thus producing different levels of two sets of bars arranged one
behind the other. The transverse bars are hollow, and water can flow
into and through them to keep them cool if desired.
The hook lips by the action of the projections upon them cause the
furnace bar ends to descend, should they by any cause not drop by
their own weight.
The transverse bars, as bearing and rocking bars, form the essential
feature in my Invention.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Snowdon in the Great Seal Patent Office
on the 13th April 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
SNOWDON, of 40, Great Russell Street, Bloomsbury, in the County of
Middlesex, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of October, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Thomas Snowdon, Her special
license that I, the said Thomas Snowdon, my executors, administrators,
and assigns, or such others as I, the said Thomas Snowdon, 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 expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN FURNACES AND IN THEIR FITTINGS," upon the condition

page_text: (amongst others) that I, the said Thomas Snowdon, my executors or
administrators, by an instrument in writing under my, or their, or one
of their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Thomas Snowdon, do hereby declare
the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement thereof, that is to say :-
This Invention relates to improvements in furnaces and in their
fittings, and consists, as will be understood by reference to the annexed
Sheet of Drawings, Figure 1, in forming the under side of furnace
bars a with a couple of hook-like lips or lugs b, b, into which pro-
jections c, c, on a cross bar as a bearing and rocking bar d are caused to
engage. The hook lips or lugs b, b, of each bar look towards each
other, as particularly shown in Figure 2, so that when the cross
bars d, d, are inclined in either direction they pull one end of the series
of furnace bars downward and push the opposite end upward, the
movement being controlled by one or more levers e, e, which can be
worked by a detachable rod ƒ, fitted over the front link j, to which the
lever e is hung. The rod f can be actuated by hand or by any suitable
appliances. Each transverse bar & has the projections c, c, in alternate
order on each side, as in the detached plan and face views, Figures 3
and 4, with spaces or openings 9, g, to enable the bars which are pulled
downward to take into the projections c, c, at the same time raising the
same ends of the next adjoining bars of the series, thus producing
different levels of bars a, a, arranged side by side as in Figure 5, the
front series of bars if two sets are employed (one set being behind
the other) can be acted upon by the same levers, and the projections
of the transverse bars can be arranged to act upon each series of furnace
bars in the same manner or in the reverse. The transverse bars are
hollow and water can flow and through them by the aperture / to keep
them cool if desired.
The hook lips b, b, by the action of the projections c, c, upon them
cause the furnace bars to descend should they by any cause not drop

page_text: The hook lips or lugs b, b, may be arranged in the same direction on
the under side of each bar, as in Figure 6, and the alternate bars of
each set or series be in opposite positions as in Figure 7, so that the
projections c, c, of the transverse bars b, b, may act upon them in the
desired manner, the furnace bars a, a, in this plan being raised and
lowered on the level as in the first arrangement.
The pull lever e terminates at the depending links j, j, of the
transverse bars upon which the lever is hung by its gabs; k is a con-
necting rod hung at one end to the link j, its other end being attached
to a short arm of a shaft 7, actuated by the levers.
The latter arrangement can be applied to double sets of bars, as in
the previous arrangement, by lengthening the lever e as before
explained.
The transverse bars in this as in the previously described plan are
preferably hollow, and as bearing and rocking bars for furnaces form an
essential feature in my Invention.
Having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim as my
Invention of "Improvements in Furnaces and in their Fittings,—
Firstly. The arrangement of the parts shown in Figures 1, 2, 3, 4, 2
and 5 of the Drawing annexed for the purpose set forth.
Secondly. I claim the arrangement of parts shown in Figures 6 and 7
of the Drawings annexed, for the purpose set forth.
Thirdly. I claim the employment of transverse bars as bearing and
rocking bars, having projections upon one or both sides for depressing 2
the furnace bars, and with spaces in alternate order with the projections
for the furnace bars to fall into when lowered, as herein-before described
and substantially as shown in the annexed Drawings.
In witness whereof, I, the said Thomas Snowdon, have hereunto
set my hand and seal, this Thirteenth day of April, One 3
thousand hundred and seventy-six.