AN APPARATUS FOR WORKING THE DAMPER IN STEAM ENGINE FURNACES
Year: 1856

page_text: LETTERS PATENT to Phillip Marcus, of Well Street, in the County of
Middlesex, Outfitter, for the Invention of "AN APPARATUS FOR WORKING
THE DAMPER IN STEAM ENGINE FURNACES."-A communication from Johu:
Taylor, of New Jersey.
Sealed the 26th August 1856, and dated the 14th March 1856.
PROVISIONAL SPECIFICATION left by the said Philip Marcus at the
Office of the Commissioners of Patents, with his Petition, on the 14th
March 1856.
I, PHILLIP MARCUS, of Well Street, in the County of Middlesex, Outfitter,
do hereby declare the nature of the said Invention for "AN APPARATUS FOR
WORKING THE DAMPER IN STEAM ENGINE FURNACES," (communicated to me by.
John Taylor, of New Jersey, a foreigner residing abroad) to be as follows:-
This Invention consists of a flexible diaphragm or plate to work a plunger,
all enclosed in a case, and connected by a lever and rod or rods to the damper in
a flue or shaft of the furnace of a steam engine. A pipe from the boiler leads
into this apparatus, and according to the pressure of the steam so the plunger
rises or falls, and through connections opens or closes wholly or partially the
damper.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Phillip Marcus in the Great Seal Patent Office on the
13th September 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PHILLIP
MARCUS, of Well Street, in the County of Middlesex, Outfitter, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourteenth day of March, in the year of our Lord
One thousand eight hundred..and..fifty-six,..in the nineteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Phillip Marcus, Her special licence that I, the said Phillip
Marcus, my executors, administrators, and assigns, or such others as I, the
said Phillip Marcus, 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 "AN APPA-
RATUS FOR WORKING THE DAMPER IN STEAM ENGINE FURNACES," (communicated
to me by John Taylor of New Jersey,) upon the .condition: (amongst others)
that I, the said Phillip Marcus, my executors or administrators, by an instru-
ment 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Phillip Marcus, do hereby declare
the nature of my said Invention, and in what manner the sanie is to be per-
formed; to, ber.particularly described and ascertained in and by, the following
statement thereof;..reference being had to..the Drawings. hereunto annexed,
that is to say
y
M
This Invention consists of a flexible diaphragm or plate to work a plunger,
all enclosed in a case, and connected by a levef and rod or rods to the daniper,
in a flue or shaft.of.the furnace of a..steam engine, a. pipe from the boiler;
leads into this apparatus, and according to the pressure of the steam;..so the
plunger rises or falls; and through connections opens or closes the damper,
wholly or partially.
J
The annexed Drawing is a sectional elevation of the apparatus connected to
a damper in the funnel of a steam engine.furnace.
A is a sole plate, on which is screwed a hollow circular case B; Cis a

page_text: flexible diaphragm, which I prefer to make of vulcanized caoutchouc; it is
held all round at its edge between a flange D on the bottom of the case B
and bottom plate A. F is a piston, the short rod of which G works through
an aperture in the case B. The rod G is hollowed to receive the pin H, the
upper end of which supports a weighted lever I, the short arm of which K
carries a knife edge, which bears against a hook L cast upon or affixed to the
case B. M is a moveable weight upon the lever I; N is a rod which connects
the long arm of the lever to the axle O of a damper P inside the funnel Q;
R is a pipe which conveys steam from the boiler into the case B under the
diaphragm C and piston F. When the pressure of the steam exceeds a certain
amount, it will raise the piston F, the pin H, and through the lever I and rod
N will close, or partially close, the damper in the funnel, and thus regulate the
draught in the furnace. The pressure up to which the steam is to be allowed
to work before the damper is moved is determined by the position of the weight
on the lever.
And having now described the nature of the said Invention and in what
manner the same is to be performed, I declare that I claim the working of
the damper in steam engine furnaces by steam from the boiler to which the
furnace is applied being made to act on a flexible diaphragm piston and lever,
in the manner herein-before described.
In witness whereof, I, the said Phillip Marcus, have hereunto set my
hand and seal, this Ninth day of September, One thousand eight
hundred and fifty-six.
PHILLIP MARCUS. (L.S.)