IMPROVEMENTS IN APPARATUS
Year: 1881

page_text: WARMING
LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for an Invention of "IMPROVEMENTS IN
APPARATUS." A communication from abroad by Alphonse Hippolyte
Godefrov. of Versailles, in the Republic of France. Medical Doctor
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 9th May 1881.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN WARMING APPARATUS." A communication from abroad by Alphonse Hippolyte
Godefroy, of Versailles, in the Republic of France, Medical Doctor.
The improvements consist of an air supply pipe furnished with a regulating
device fitted to the hearth of a stove, and thereby supplying and regulating the
necessary amounts of air to the fuel for its proper and economical combustion, the
smoke or unconsumed products from the combustion of the fuel being discharged
into the chimney, thus allowing the openings in the stove and chimney in commu-
nication with it to be closely shut, and so prevent any deleterious gases from
entering the room.
The air pipe, stove, and chimney may be made of or in one metal tube, closed
below. In said tube a double current of air is established, one going up, and
composed of the products of combustion, the other passing downwards, and con-
sisting of cold and heavy air from without, furnishing the necessary element for
combustion. The regulating device may consist of a metal diaphragm or damper
placed at a convenient height within the tube, and fitted with a handle for turning
it across or partly across the tube.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
1st November 1881.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN WARMING APPARATUS." A communication from abroad by Alphonse Hippolyte
Godefroy, of Versailles, in the Republic of France, Medical Doctor.
This Invention has for its object to avoid the dangers which accompany the uso
of movable and other stoves.
The apparatus which constitutes this Invention consists chiefly of a conduit
provided with a regulating device or valve for establishing communication between
the hearth of the stove and the interior of the chimney, in order to obtain from the
latter the air required for combustion.
As both the discharge of smoke and the supply of air take place in the chimney,
the openings of the stove and of the chimney which communicate with the room
to be heated may be hermetically closed, so that no deleterious gases can intrude
into the latter.
The chimney with the stove represent a tube closed at the bottom. A double
current is established in this tube, namely, a rising current composed of the
products of combustion, and a down current composed of cold atmospheric air,
which is heavier than the heated gases, and furnishes the elements necessary for
combustion.
CLAIM.
The application of an air supply-pipe passing from the hearth to the interior of
the chimney, and provided with a valve or other regulating device, substantially
as described.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and scal, this Thirty-first day of October. A.D. 1881.