IM- PROVEMENTS IN STEAM BOILERS AND THE APPARATUS CONNECTED THEREWITH
Year: 1874

page_text: LETTERS PATENT to Albert Sauvée, of 22, Parliament Street, in the
"
County of Middlesex, Civil Engineer, for the Invention of "IM-
PROVEMENTS IN STEAM BOILERS AND THE APPARATUS CONNECTED THEREWITH.
-A communication from abroad by Casimir Dóchamp, of Lyons,
in the Republic of France.
PROVISIONAL SPECIFICATION left by the said Albert Sauvée at the
Office of the Commissioners of Patents, with his Petition, on the
2nd June 1874.
I, ALBERT SAUVÉE, of 22, Parliament Street, in the County of
Middlesex, Civil Engiucer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM BOILERS AND THE APPARATUS CON-
NECTED THEREWITH," a communication from abroad by Casimir Dechamp,
of Lyons, in the Republic of France, to be as follows:-
This Invention consists in connecting together the float inside the

page_text: connection is established by means of an ordinary steam pipe. On this
pipe is mounted the alarm whistle, which is rather small, and always
in open communication with the steam pipe, through an orifice which
is not more than to of an inch in diameter. This whistle gives a
sharp sound with a very small quantity of steam.
One end of the pipe opens into the box of the safety valve and the
other end at the top of a vertical steam cylinder, in which a piston
moves whose rod goes through the cylinder covers at each end. The
top part of the rod is connected with a chain which passes over a pulley
and has a counterweight attached to it. The lower end of the rod is
connected by a connecting rod and a few links of chain to the damper,
which can revolve round a horizontal axis.
The float is attached to a bent lever with a counterweight at the
other end. This lever is fastened to the top of the boiler by a bracket,
which acts as the fulcrum of the lever. Upon this lever there rests a 1
small rod attached to the safety valve.
When the level of the water is lowered by any means whatever, the
float causes the further end of the lever attached to it to rise and
thereby lift up the safety valve, by which means the steam enters the
aforesaid pipe, causing the whistle to blow, and as the quantity of steam 2
used by the whistle is comparatively very small, the pressure in the
connecting pipe rises rapidly and presses on the top of the piston in
the vertical cylinder causing a downward stroke which closes the
damper.
The sare f
23
AWODNA of
MARGINA
the boils. the atram

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Albert Sauvéc in the Great Seal Patent Office on
the 24th November 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALBERT
SAUVÉE, of 22, Parliament Street, in the County of Middlesex, Civil
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of June, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Albert Sauvée, Her special licence that I;
the said Albert Sauvée, my executors, administrators, and assigns, or
such others as I, the said Albert Sauvée, 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 Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN STEAM BOILERS AND
THE APPARATUS.CONNECTED THEREWITH," a communication to me from
abroad by Casimir Dechamp, of Lyons, in the Republic of France, upon
the condition (amongst others) that I, the said Albert Sauvée, 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 tho
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 Albert Sauvée, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the-
following statement (that is to say) :-
This Invention consists in connecting together the float inside the
boiler, the alarm whistle, and the damper in the chimney. The
connection is established by means of an ordinary steam pipe. On this...
pipe is mounted the alarm whistle, which is rather small and always
in open communication with the steam pipe through an orifice which

page_text: is not more than to of an inch in diameter.
sharp sound with a very small quantity of steam.
This whistle gives a
One end of the pipe opens into the box of the safety valve and the
other end at the top of a vertical steam cylinder, in which a piston
moves whose rod gocs through the cylinder covers at each end. The
top part of the rod is connected with a chain which passes over a pulley
and has a counterweight attached to it. The lower end of the rod is
connected by a connecting rod and a few links of chain to the damper,
which can revolve round a horizontal axis.
The float is attached to a bent lever with a counterweight at the
other end. This lever is fastened to the top of the boiler by a bracket,.
which acts as the fulcrum of the lever. Upon this lever there rests a
small rod attached to the safety valve.
When the level of the water is lowered by any means whatever, the
float causes the further end of the lever attached to it to rise and
thereby lift up the safety valve, by which means the steam enters the
aforesaid pipe, causing the whistle to blow, and as the quantity of steam
used by the whistle is comparatively very small, the pressure in the
connecting pipe rises rapidly and presses on the top of the piston in
the vertical cylinder, causing a downward stroke which closes the
damper.
•
In the case of an excess of pressure in the boiler, the steam escapes
through the safety valve and presses in the same manner upon the
piston.
When the level or the pressure have returned to their normal state,
the counterweight at the top part of the piston rod lifts up the piston,
and thereby reopens the damper.
But in order that this Invention may be fully understood, I will
proceed to describe the same, by the aid of the accompanying Sheet of
Drawings, in which A is the safety valve upon the top of the boiler;
a, a, are its double levers, at the ends of which are the counter-
weights p, p; the levers move in the guides e, c. These parts are made
of wrought and cast iron. 6 is the cover of the safety valve box d, and
k is a guide at the bottom of the valve box; s is the body of the valve.
These parts are made of bronze: q is a square piece of iron screwed
into the top of the valve s; and is a steel rod screwed into the

page_text: bottom, and which passes through the guide ; o, o, are the holes or
orifices for the steam to enter the valve. B is the float; 1, the lever
attached to it, and C the counterweight; c is the bracket which serves
as the fulcrum of the lever, and g is a guide for the lever. E is the
cylinder of the damper; fis the piston, and t, t, the rod going through
P is the counter-
the covers at top and bottom; m, m, are the covers.
weight of the damper; u is a few links of chain connecting the
damper D with the rod t and which is guided by the piece of iron
plate V rivetted on to the damper. y is the axis, which is placed at a
certain distance from the middle of the damper; z, z, is the frame of
the damper, and x, x, are stops. G is the steam pipe which connects
the safety valve. A with the cylinder E, and S is the alarm whistle
mounted on the pipe. F is the ash-pit.
If the level of the water falls, through the feeding apparatus being
out of order, or any other cause, the float B in descending brings the
small arm of the lever in contact with the bottom rod of the safety
valves, and as soon as the force of the float and the steam overcomes
the resistance of the safety valve with its levers and counterweights,
the valve s is raised, and by this means the steam enters the box d and
passes through the pipe G, causing the whistle to blow, and finally
enters the cylinder E at the top, forcing the piston f down, which
closes the damper D, thus completely shutting off the draught and
stopping the further production of steam, which will prevent the level
of the water falling lower, and thereby the burning of the plates. As
soon as the fault has been repaired, the water level will rise and the
lever attached to the float will permit the safety valves to fall, shutting
off the entrance of steam to the pipe G, and the force of the steam
being removed from the top of the piston f the counterweight P will
open the damper and the draught will be re-established, the whole of
the apparatus now being in its normal state.
In the case of excess of pressure in the boiler, as soon as the
resistance of the safety valve is balanced, the slightest increase of
pressure will raise the valve, and the apparatus will act in exactly the
same manner as above described.
The apparatus will act without the level of the water falling too low
or the pressure of the steam being too great; for example, if the float

page_text: the connecting rod or chain of the damper breaks, in the first case
the float will fall and the safety valve will be opened; in the second
case the damper will fall by its own weight.
The apparatus can be applied to either fixed, marine, locomotive, 'or
portable engine boilers, and will be the same in general principles for
each, varying only in details. They will all have a safety valve with
counterweights or springs, and a float which causes the steam to act on
the damper or valve, shutting off the draught and re-establishing it in
the furnace, as above described.
In witness whereof, I, the said Albert Sauvée, have hereunto set
my seal, this hand and Twenty-fourth day of November, in the
year of our Lord 1874.
A. SAUVÉE. (L.S.)