AN IRON OVEN UPON AN ENTIRE NEW CONSTRUCTION, WITH A GRATE AND REGULATOR TO ADD OR DIMINISH HEAT, TO BE PLACED IN A PARTICULAR MANNER ON THE BACK SIDE OF A COMMON RANGE FIRE, SO AS TO BAKE EVERY NECESSARY ARTICLE UPON A. MORE CERTAIN PRINCIPLE THAN ANY OTHER OVEN YET KNOWN
Year: 1773

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, we, MATHEW
GLENTON, of Borough Bridge, in the County of York; Inn Keeper," and
WILLIAM CLEMETSHAW, of Aldborough, in the said County, Whitesmith, send
greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
*Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-third day of April, in the thirteenth year of His reign,
did give and grant unto us license to make, use, exercise, vend, and fix,
within England, Wales, and Town of Berwick-upon-Tweed, and also within
all His Majesty's Colonies and Plantations abroad, our Invention of "AN
IRON OVEN UPON AN ENTIRE NEW CONSTRUCTION, WITH A GRATE AND REGULATOR
TO ADD OR DIMINISH HEAT, TO BE PLACED IN A PARTICULAR MANNER ON THE BACK
SIDE OF A COMMON RANGE FIRE, SO AS TO BAKE EVERY NECESSARY ARTICLE UPON A.
MORE CERTAIN PRINCIPLE THAN ANY OTHER OVEN YET KNOWN;" in which Letters
Patent there is a proviso obliging us, by an instrument in writing under
our hands and seals, to cause a particular description of the nature of our
said Invention, and in what manner the same is to be performed, to be
inrolled in His Majesty's High Court of Chancery within four calendar
months next after the date of the said recited Letters Patent, as in and by
the same, relation being thereunto had, may more fully appear.
NOW KNOW YE, that in compliance with the said proviso, we, the said
Mathew Glenton and William Clemetshaw, do hereby declare that our

page_text: said Invention of an iron oven is particularly described in the Plan and
explation thereof hereunder written.
In witness whereof, we, the said Mathew Glenton and William Clemet-
shaw, have hereunto set our hands and seals, this Twenty-sixth day
of June, in the year of our Lord One thousand seven hundred and
seventy-three.
above-named Mathew Glenton and
William Clemetshaw, in our pre-
sence,
H. ATKINSON,
Of Ripon, in the County of York, Attorney-at-Law.
ARCHEBALD NAPIER,
Servant to the above-named Mathew Glenton.
EXPLANATION OF THE PLAN ABOVE REFERRED TO.
Fig. 1st, the oven, to be made of cast iron, in the following proportions:
That part next the fire, marked letter (A), is made one part in three thicker
than the bottom, which is marked letter (B), and is to be one part in three
thicker than the top letter (C) and back (B). Those proportions are ascer-
tained according to the largeness of the family (and fire) wanting the same,
i. e., the plate next the fire from two inches thick to half an inch thick, and
the rest thick in proportion. N.B. This oven is either cast with all its parts
together, or seperate in three or four parts, as most convenient to the situation
of the fireplace intended for, for if the ovens are small ones it is impossible
to preserve the necessary proportions by casting, therefore, if in seperate
parts, as follows, vizt: The part (A) and the part (B) are cast together, and
at the back part of the bottom (B) there is a grove on the bottom part for
(D) to stand in, and the top part (C) lyes upon a grove at the top of the
front part (A), and has an abutment for the back part of (D) to rest against,
so that when thus fixed it answers the same end as cast altogether.
Fig. 2, the grate. The grate is made of the same metal as the oven, and
is fixed at the bottom of the oven as Figure 3d..
Figure 3d, the bottom of the oven with the grate.
Figure 4th, the regulator, which. is put to the grate as at (Figure 5), and
by moving the handle at E adds or diminishes the heat that passes through
the grate.
Fig. 5th, the oven, grate, and regulator.

page_text: Fig. 6th, the range, with the oven and all its parts set. (F) is the door of
the oven, which may be placed at either end. N.B. There is an open part
of the fireplace under the grate at (G) that discharges the ashes, and the
air passing through circulates the heat passing through the grate to all the
parts of the bottom of the oven, as the bottom is left hollow for that purpose.
The corollary: The fire in the range acting upon the front part of the oven
occasions a heat not only to that part, but the top part also, and the barred
grate fixed at the bottom admits a heat to the bottom and back part of the
oven, as those parts are proportioned to the heat they receive, by which means
the oven is kept in due heat; but as the fire is sometimes larger and sometimes
less, the regulator is added to remedy that disproportion.