Year: 1886

page_text: Date of Application, 23rd Oct., 1886.
Complete Left, 19th July, 1887.
Complete Accepted, 26th Aug., 1887
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, London, do hereby declare the nature of this invention to
be as follows :-
The object of this invention is to avoid the formation of smoke in the combustion
of coal.
This object is obtained by adding to the coal suitable substances, which cause an
active combustion. Such substances are carbonates, peroxides, oxides or hydrated
oxides of barium, strontium, magnesium, aluminium, iron, manganese or chromium.
The following composition offers for instance a very good result viz. :-66 parts of
coal, 33 parts of limestone and one part of pyrolusite are mixed to a tough doughy
mass by moistening the same with an aqueous solution of vegetable tar, which is
produced by tempering one part of tar with nine parts of boiling water.
Briquets are made of such mass, which briquets when dried form an excellent
fuel, as they do not produce smoke in consequence of the following chemical action
in the fire-place.
At a temperature of about 1200 to 1300 degrees Fahrenheit the carbonic acid of
the limestone becomes free and is decomposed by the incandescent coal into oxide of
carbon and oxygen; the latter facilitates the subsequent combustion of the carbon.
The oxide of carbon, both that reduced from the carbonic acid and that produced by
the oxidation of the carbon, is reduced in the air to carbonic acid by developing heat.
A part of the carbonic acid escapes with the draught of air, while the other part
unites with the reduced lime to enter again into the chemical circulation.
The small quantity of pyrolusite added to the doughy mass easily develops
oxygen, thus facilitating the combustion. The protoxide of manganese reduced is
again oxidized by the hot air into a combination of protoxide and oxide of
manganese, which serves as a new source of oxygen.
Dated this 23rd day of October 1886
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Preparation of Fuel.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake and Co., Patent Agents,
Southampton Buildings in the County of Middlesex do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The object of this invention is to avoid the formation of smoke in the combustion
of coal and to prevent the destruction of the iron parts of the stove by the sulphurous
gases produced from coals containing pyrites. This object is obtained by adding to
the coal suitable substances, which causes an active combustion and bind or destroy
the sulphurous gases. Such substances are carbonates, peroxides, oxides, or hydrated
oxides of barium, strontium, magnesium, aluminium, iron, manganese or chrome.
The following composition offers for instance a very good result. 66 parts of coal,
33 parts of limestone and one part of pyrolusite. These are mixed to a tough
doughy mass by moistening the same with an aqueous composition of tar, which is
produced by tempering one part of tar with nine parts of boiling water.
Briquets are made of such mass which briquets when dried form an excellent fuel,
as they do not produce smoke and as it prevents any destruction of the iron parts of
the stove in consequence of the following chemical action in the fire place.
At a temperature of about 1200 to 1300 degrees Fahrenheit the carbonic acid of
the limestone becomes free and is decomposed by the incandescent coal into oxide
of carbon and oxygen; the latter facilitates the subsequent combustion of the carbon
and of the sulphur which enters in combination with the limestone to form gypsum,
thus avoiding any noxious influence on the iron parts of the fire place.
The small quantity of pyrolusite added to the doughy mass easily develops oxygen
even at low temperature, thus facilitating the combustion. The protoxide of
manganese reduced is again oxidized by the hot air into a combination of protoxide
and oxide of manganese, which serves as a new source of oxygen.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, as communicated to me by my
foreign correspondent, I declare that I make no claim to other methods of preparing
fuel now in use, but what I claim is ;
First. The art or process of mixing coal with limestone pulverized or otherwise
rendered into small pieces and making briquets from such mixture, substantially as
and for the purposes specified.
Second. A compound composed of pulverized coal, limestone and pyrolusite formed
into briquets substantially in the proportions and for the purposes set forth.
Dated this 10th dow of
T11007
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.