IMPROVEMENTS IN THE CONSTRUCTION OF VERTICAL STEAM BOILERS
Year: 1862

page_text: LETTERS PATENT to Frederick Tolhausen, Civil Engineer and Patent
Agent, 17, Rue du Faubourg Montmartre, Paris, in the Empire of
France, for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF
VERTICAL STEAM BOILERS."-A communication from Jean Larmanjat,
Mechanical Engineer residing at No. 24 Rue du Mail Paris.
Sealed the 7th August 1862, and dated the 12th February 1862.
PROVISIONAL SPECIFICATION left by the said Frederick Tolhausen
at the Office of the Commissioners of Patents, with his Petition, on the
12th February 1862.
I, FREDERICK TOLHAUSEN, Civil Engineer and Patent Agent, 17, Rue du
Faubourg Montmartre, Paris, in the Empire of France, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF
VERTICAL STEAM BOILERS," a communication from Jean Larmanjat, Mechanical
Engineer, a person resident at No. 24, Rue du Mail, Paris, to be as
follows:-
My vertical steam boilers are constructed with a view to increasing the
heating surface, saving of fuel, and consumption of smoke. The main body
of my boilers consists of a cylindrical portion of small diameter occupying the
centre of the fire space under and around it; this vertical cylinder widens out
at about two-thirds of the total height of the boiler into another cylindrical

page_text: and concentric portion, which is firmly united to said under cylinder by a
bottom having the shape of a truncated cone or frustrum. The two cylinders
described forming one single recipient, contain the necessary quantity of water for
generating steam, they are surrounded with and supported by brickwork, but
in such manner as to leave an annular fire space all round the lower cylinder,
and also around part of the upper cylinder. Through the annular space
surrounding the lower cylinder I carry an annular cylindrical and concentric
water chamber, extending from the fire-box to nearly the truncated conc
bottom above mentioned, and bisecting the lower annular space vertically.
The flames and gases are thus forced to pass up between the inside of the
annular water chamber and the small cylinder of the main body, then strike
against the truncated cone bottom, pass round the lower portion of the upper
cylinder, and finally escape down along the outside of the annular water
chamber into a flue or flues. By this mode of conducting the combustible
gases and other products of combustion a great saving in fuel and consumption
of smoke is effected. The annular water chamber is in constant com-
munication with the upper portion of the main body of the boiler by means of
elbow pipes passing through the annular fire space.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Tolhausen in the Great Seal Patent Office on
the 12th August 1862..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
TOLHAUSEN, Civil Engineer and Patent Agent, 17, Rue du Faubourg
Montmartre, Paris, in the Empire of France, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of February, in the year of our
Lord One thousand eight hundred and sixty-two, in the twenty-fifth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Frederick Tolhausen, Her special licence that I, the said
Frederick Tolhausen, my executors, administrators, and assigns, or such
others as I, the said Frederick Tolhausen, my executors, administrators,.
and assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United King-
dom of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF VERTICAL TEAM

page_text: BOILERS," a communication from Jean Larmanjat, Mechanical Engineer, a
person resident at No. 24, Rue du Mail, Paris, upon the condition,
(amongst others,) that I, the said Frederick Tolhausen, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the nature'
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Frederick Tolhausen, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by-
the following statement :-
My vertical steam boilers are constructed with a view to increasing the
heating surface, saving of fuel, and consumption of smoke: The main body
of
my boilers consists of a cylindrical portion of small diameter occupying the
centre of the fire space under and around it; this vertical cylinder widens out
at about two-thirds of the total height of the boiler into another cylindrical
and concentric portion, which is firmly united to said under cylinder by a
bottom having the shape of a truncated cone or frustrum. The two cylinders
described, forming one single recipient, contain the necessary quantity of water
for generating steam; they are surrounded with and supported by brickwork,
but in a such manner as to leave an annular fire space all round the lower
cylinder, and also around part of the upper cylinder. Through the anular
space surrounding the lower cylinder I carry an annular, cylindrical, and con-
centric water chamber, extending from the fire-box to nearly the truncated
cone bottom above mentioned, and bisecting the lower annular space vertically.
The flames and gases are thus forced to pass up between the inside of the
annular water chamber and the small cylinder of the main body, then strike
against the truncated cone bottom, pass round the lower portion of the upper
cylinder, and finally escape down along the outside of the annular water
chamber into flue or flues. By this mode of conducting the combustible gases
and other products of combustion a great saving of fuel and consumption of
smoke is effected. The annular water chamber is in constant communication
with the upper portion of the main body of the boiler by means of elbow pipes
passing through the annular fire space.
In due reference to the above description, and to the annexed Sheet of
Drawings, which represents a vertical section of the improved steam boiler,
B is the cylindrical portion of small diameter occupying the centre of the fire
:

page_text: space, and widening out at about two-thirds of the total height of the boiler
into another cylindrical and concentric portion A, which is firmly united to
said under cylinder B by a bottom A', having the shape of a truncated cone
or frustrum; E, brickwork supporting the two cylinders; B', annular fire
space or flue; D, annular and cylindrical water chamber extending from the
fire-box to near the truncated cone bottom A' of the cylinder A; F, grate
bars; G, escape flues; H, ash-pit. The flames and gases pass up the inside
annular space B', and after heating the bottom A¹, pass down the outside
annular space B, and escape into the flue G; C, feed pipe; I, elbow pipes,
forming connections between the spaces A and D; J is a prolongation of one
of the communicating pipes I; the object of this pipe J is to create a current
in the water space D, without which a vaenum would be created in the same,
and the practical working of vertical steam boilers would become impossible.
No particular claim is laid to the alarm whistle and gauge float shewn on
the annexed Sheet of Drawings; but what is claimed is; the arrangement of
generating parts of vertical steam boilers, herein-before described (or any
mere modification thereof), for the purposes set forth.
In witness whereof, I, the said Frederick Tolhausen, have hereunto set
my hand and seal, this 9th day of August, A.D. 1862.