AN IMPROVED PREPARATION OF COAL FOR FUEL
Year: 1821

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
DAVEY, of Old Swan Wharf, Chelsea, in the County of Middlesex, Coal
Merchant, send greeting.
WHEREAS His most Excellent Majesty King George the Fourth did,
by His Letters Patent under the Great Seal of that part of the United
Kingdom of Great Britain and Ireland called England, bearing date at West-
minster the Eighteenth day of October, in the second year of His reign,
give and grant unto me, the said Peter Davey, my exors, adiñors, and assigns,
His especial licence, full power, sole privilege and authority, that I, the said
Peter Davey, my exors, admors, and assigns, during the term of years therein
mentioned, should and lawfully might make, use, exercise, and vend, within
England, Wales, and the Town of Berwick-upon-Tweed, my Invention of "AN
IMPROVED PREPARATION OF COAL FOR FUEL;" in which said Letters Patent there
is. contained a proviso, that if I, the said Peter Davey, shall not particularly
describe and asccertain the nature of my said Invention, and in what manner
the same is to be prepared, by an instrument in writing under my band and
seal, and cause the same to be inrolled in His Majesty's High Court of
Chancery within four calendar months next and immediately after the date of
the said Letters Patent, that then the said Letters Patent, and all liberties
and advantages whatsoever thereby granted, shall utterly cease, determine, and
become void, as in and by the same, relation being thereunto had, will more
fully and at large appear.

page_text: T
NOW KNOW YE, that in compliance with the said proviso, I, the said
Peter Davey, do hereby describe and ascertain the nature of my said Inven-
tion, and a manner in which I have performed the same, by the following
description thereof, reference being had to the Drawings and Figures annexed
(that is to say):-
My Invention doth consist in an improved preparation of coal for fuel,
which I call gascous coke, and which is made of very small coals mixed with
coal tar (either in a pure state, which is the best, or combined with naphtha
and those other ingredients with which it is generally found impregnated), and
then cemented together by the application of heat in the form of large lumps
or cakes, for the purpose of fuel.
The following is a mode which I have adopted for the manufacture of the
gaseous coke by distillation or otherwise, separate from coal tar, the aqueous
parts, and most of the naphtha :--Take about three quarts of the tar thus pre-
pared and mix it well with about a bushel of the smallest Newcastle or Sunder-
land coals, in the same manner you would mix brick, earth, or mortar; press
this mixture into moulds or pans, such as are herein-after described, and tread or
ram it down into them. This being done, place the paus, with the mixture in
them, in an air furnace, previously heated to three hundred and fifty degrees
of Farronheite's thermometer. Let them remain in the furnace and exposed
to the before-mentioned degrees of heat for four successive hours, then let
them be removed and suffered to cool gradually, when the mixture in each
will be found one solid compact mass, and may be turned out of the moulds or
pans, being then formed into what I call gaseous coke, and fit for the purposes
of fuel.
DESCRIPTION OF THE DRAWING.
Fig. 1 represents a perspective view of the iron pan or mould, herein-before
described. A, B, are two bars of iron, laid across the pan for the purpose
of placing a second pan over it. When in the furnace, if the furnace be high
enough, two, three, or more may be piled on one another in this way. Fig. 2
is a longitudinal section of the pan or mould; Fig. 3 is a transverse section
of the pan or mould. The pans or moulds are made of cast or wrought iron
of about three-eighths of an inch thick, and are made larger at the top than
at the bottom, in order more easily to disengage the coke from it when cold.
Now, such an improved preparation of coal for the purposes of fuel as is
herein-before particularly described, and a manner of making, which is herein-
before particularly set forth, and which said preparation I call gaseous coke,
being entirely new and never before used for the purposes aforesaid in thes

page_text: kingdoms, to the best of my knowledge and belief, I am desirous to maintain
this my exclusive right and privilege to the same.
In witness whereof, I, the said Peter Davey, have hereunto set my band
and seal, this Sixteenth day of February, in the year of our Lord One
thousand eight hundred and twenty-two.
Inrolled the Sixteenth day of February, in the year of our Lord One
thousand eight hundred and twenty-two.