FOR CERTAIN IMPROVEMENTS IN THE MEANS OF AND APPARATUS FOR HEATING OVENS
Year: 1851

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
ALTREE, of Compton Street, Brunswick Square, in the County of Middlesex,
Baker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent under the Great Seal of the United Kingdom of Great Britain and
Ireland, bearing date at Westminster, the Fifth day of December, in the
fifteenth year of Iler reign, did, for Herself, Her heirs and successors, give
and grant unto James Thompson, of Compton Street, Brunswick Square, afore-
said, and the said Frederic Altree, Her especial licence, that the said James
Thompson and the said Frederick Altree, their exors, adññiors, and assigns, or
such other as the said James Thompson and the said Frederic Altree, their
exors, adñiors, and assigns, should at any time agree with, and no others, from
time to time and at all times during the term of years therein expressed,
should and lawfully might make, use, exercise, and vend, within England,
Wales, and the Town of Berwick-upon-Tweed, our Invention "FOR CERTAIN
IMPROVEMENTS IN THE MEANS OF AND APPARATUS FOR HEATING OVENS ;" in which
said Letters Patent there is contained a proviso obliging them, or either of
them, the said James Thompson and Frederick Altree, by an instrument in
writing under their or either of their hands and seals, particularly to describe
and ascertain the nature of their said Invention, and in wha imanner the same

page_text: is to be performed, and to cause the same to be enrolled in Her Majesty's
High Court of Chancery within six calendar months next and immediately
after the date of the said recited Letters Patent, as in and by the same, reference
being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Frederick Altree do hereby declare that the nature of the said Invention, and
the manner in which the same is to be performed, are described and ascer-
tained by the Drawing in the margin hereof, and the words following, that
is to say:
I declare and describe the nature of my aforesaid Invention, and the
manner in which I perform the same, to be as follows:-The annexed
Drawing represents a sectional elevation of an ordinary baker's oven, to be
heated with gas instead of coal, &c. ; the common coal gas is to be conveyed
from the main through the pipe a, a, to or near the extremity or further end
of such oven, where it is to be ignited and consumed from a fan-tail or any
other description of burner affixed the feed pipe a, a; this pipe passes through
the centre of another of suitable capacity or.diameter marked b, b, which is to
supply the requisite quantity or volume of atmospheric air for the perfect com-
bustion of the gas so employed, and such supply of air may be regulated by a
register or valve at the end c, c, where the air is admitted; the heated gases
arising from such combustion are to be retained in the said oven by a damper
in the front (as usual) until all the availablo caloric has been communicated
or absorbed by the brickwork, &c., of the oven; when the proper temperature
has been acquired, the pipes a and b are to be withdrawn, the gas pipe a being
connected with the mains by au union joint for that purpose. In certain
localities where common coal gas is not available, I employ naptha, or any
other combustible fluid applied in efficient lamps or burners for this purpose.
And I claim as my Invention the heating of ovens, &c., internally from tho
caloric evolved by the combustion of gases.
In witness whereof, I, the said Frederick Altree, have hereunto set my
hand and seal, this Fifth day of June, in the year of our Lord
One thousand eight hundred and fifty-two.
:
FREDERICK (L.S.) ALTREE,

page_text: AND BE IT REMEMBERED, that on the Fifth day of June, in the
year of our Lord 1852, the aforesaid Frederick Altree came before our
said Lady the Queen in Her Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according to
the tenor of the Statute made for that purpose.