IMPROVEMENTS IN FURNACES AND OVENS FOR Baking and oTHER PURPOSES
Year: 1872

page_text: LETTERS PATENT to Arthur Frederick Garrood, of Limehouse, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN
FURNACES AND OVENS FOR Baking and oTHER PURPOSES.”
Sealed the 21st January 1873, and dated the 30th November 1872.
PROVISIONAL SPECIFICATION left by the said Arthur Frederick
Garrood at the Office of the Commissioners of Patents, with his
Petition, on the 30th November 1872.
I, ARTHUR FREDERICK GARROOD, of Limehouse, in the County
of Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN FURNACES AND OVENS FOR BAKING AND OTHER PURPOSES," to
be as follows :-
This Invention has for its object improvements in the arrangement
and construction of furnaces and ovens for baking and other purposes.
Furnaces for heating ovens and other purposes are arranged, in
accordance with my improvements, so as to rotate or partially rotate
within a chamber below the oven or other surface to which the heat is

page_text: applied, the reversible revolving furnace grate or chamber containing
the fuel being carried by a central hollow axis, through which the air for
supporting combustion is conducted by an air pipe connected therewith.
The weight of the furnace is balanced by a weighted arm on the
opposite side of the axis, and the furnace may be caused to rotate by
means of a toothed wheel and pinion, or by other suitable mechanical
means.
Fuel is supplied to the furnace through a door on either side or end of
the furnace chamber, and the furnace can be moved round upon its axis
so as to apply the heat uniformly to different portions of the under
surface of the oven from time to time, as may be required, and the
supply of air to the furnace may be regulated by a damper or valve.
Ovens arranged in accordance with my Invention are supported
within a chamber above the furnace in such manner as to leave a space
entirely around, above, and below it, except at the front end, where the
door or entrance is situated. By this arrangement the heat and
products of combustion from the furnace can circulate below, around,
and above the oven, finally escaping by a chimney placed in a central
position in the roof or arch over the oven.
The bottom of the oven is
protected by a plate or false bottom.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Arthur Frederick Garrood in the Great Seal Patent
Office on the 30th May 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ARTHUR
FREDERICK GARROOD, of Limehouse, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of November, in the
year of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,..
give and grant unto me, the said Arthur Frederick Garrood, Her special
license that I, the said Arthur Frederick Garrood, my executors,
administrators, and assigns, or such others as I, the said Arthur
Frederick Garrood, my executors, administrators, and assigns, should

page_text: 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 OVENS FOR
BAKING AND OTHER PURPOSES," upon the condition (amongst others) that I,
the said Arthur Frederick Garrood, 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 Arthur Frederick Garrood, 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 has for its object improvements in the arrangement
and construction of furnaces and ovens for baking and other purposes.
And in order that my Invention may be clearly understood and
readily carried into practice I will proceed to describe the Drawing here-

page_text: arranged with axes d', d, which revolve in stationary bearings as shewn,
and the bottom of the hollow axis or chamber d revolves in a circular
channel d³ containing sand or water to form an air-tight joint.
Fuel is supplied to the furnace through the door g, which may be
situated on either side or end of the furnace chamber, and the furnace a
can be moved round upon its axis so as to apply the heat uniformly to
different portions of the under surface of the oven from time to time by
turning the crank handle f', as may be required, and the supply of air
to the furnace may be regulated by the damper of valve h in the outlet i
leading to the chimney.
Ovens arranged in accordance with my Invention are supported
within the chamber c above the furnace in such manner as to leave a
space entirely around, above, and below it, except at the front end,
where the door or entrance is situated. By this arrangement the heat
and products of combustion from the furnace can circulate below,
around, and above the oven, finally escaping by the outlet or chimney i
placed in a central position in the roof or arch over the oven.
The bottom of the oven is protected by a plate ; as shown, j being a
false bottom to the oven, upon which the articles to be baked are placed.
Ovens arranged in accordance with my improvement are heated?
uniformly throughout, the heat being regulated as required, the interior
of the oven being kept pure and free from noxious gases.
Steam may be admitted to the interior of the oven by means of a
steam pipe or otherwise, if desired.
By arranging and mounting the furnace a as previously described, in:
accordance with my improvements, coke or other smokeless fuel can be
supplied thereto, thus preventing the possibility of smoke escaping
therefrom, and the supply of air to the furnace for supporting com-
bustion can if desired be regulated by, a valve or damper arranged in
the passage e.
Having thus described the nature of my Invention and the manner of
performing or carrying the same into practice, I would have it under-
stood that I do not confine myself to the exact arrangement herein
shown and described, but what I claim is, the improved arrangement
and construction of furnaces and ovens for baking and other purposes, a
whereby the furnace can be moved from one position to another, in

page_text: order to vary and regulate the application of the heat, substantially in
the manner herein-before described and shewn in the Drawing hereunto
annexed.
In witness whereof, I, the said Arthur Frederick Garrood, have
hereunto set my hand and seal, this Twenty-third day of May, in
year of our Lord One thousand eight hundred and seventy-three.
Witness,
0
ARTHUR F. GARROOD. (L.S.)
E. C. T. BLAKE,
34, Southampton Buildings,
Chancery Lane,
W. C.