IMPROVEMENTS "IMPROVEMENTS IN APPARATUS FOR INDICATING AND AND REGISTERING THE PRESSURE OF STEAM OR OTHER GASES OR LIQUIDS
Year: 1869

page_text: LETTERS PATENT to Bernard Isangk, of 3, Ile Lacroix, in the City
of Rouen, in the Empire of France, Civil Engineer, for the
Invention of "IMPROVEMENTS
"IMPROVEMENTS IN APPARATUS FOR INDICATING AND
Scaled the 25th February 1870, and dated the 1st September 1869.
PROVISIONAL SPECIFICATION left by the said Bernard Isangk at the
Office of the Commissioners of Patents, with his Petition, on the
1st September 1869.
I, BERNARD ISANGK, of 3, Ile Lacroix, in the City of Rouen,
in the Empire of France, Civil Engineer, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN APPARATUS FOR INDICATING AND
REGISTERING THE PRESSURE OF STEAM OR OTHER GASES OR LIQUIDS," to be as
follows:-
This Invention has for its object to provide appropriate means or
appliances for registering the variations of the pressure of steam or other
gases in boilers or other generators, so as to indicate by means of a
curve or continuous line the various pressures of such steam or other
gases during certain stated periods or spaces of time. To this end I

page_text: provide a case or box made of iron, tin, or other appropriate material,
which may be locked or unlocked as required, containing a clockwork
fitted with hands and a dial plate for denoting the hours and minutes,
and having a suitable aperture closed with a piece of glass or other
transparent material over the dial plate. To the axis or spindle of the
said clockwork I fit or attach a cylinder or cylindrical casing, upon the
surface of which I fix a sheet of paper or other suitable material upon
which are ruled two series of lines perpendicular to each other; in one
direction there may be either twenty-four, twelve, or such other number
of lines as correspond to the number of hours of the period during
which the pressure is to be registered, and at right angles to these
there may be another series of lines drawn in such a manner that
the distances of or spaces between any two successive lines represent
or correspond to either one pound on every square inch, one atmosphere,
or such other unit of pressure as may be used or employed in each
case or instance. To the hand or pointer of the steam or pressure
guage of the boiler or generator I fit or attach one end of a connecting
rod or other suitable link, with the other end of which I connect a
pencil case or other appropriate appliance for holding or carrying a
pencil or marker, and which pencil case may be fitted with antifriction
rollers, and work within a groove or guide pieces attached to the inside
of the case or box containing the clockwork and the cylinder fitted to
the axis or spindle thereof, in such a manner as to perform one complete
revolution in either twenty-four, twelve, or such number of hours as
may be required, so that the pencil or marker held by or enclosed
within the pencil case may describe upon the paper a continuous line
or curve denoting the exact pressure of the steam or gas throughout the
period or space of time during which the guage is acted or worked upon
by the steam or gas contained in the boiler or generator to which it is
fitted.
By a modification in the arrangement described I so fit or attach
one end of a roll of paper or other suitable material of appropriate
width to a roller or pulley placed within the aforesaid box or case,
and so attach the other end of this roll to the cylinder or cylindrical
casing that the said cylinder may during each revolution take or roll
up a certain length or portion of this roll in such a manner that the
line or diagram drawn by the pencil or marker may denote the pres-
sures during any desired length of time, either days or weeks, instead
of being confined to a stated number of hours, as in the case of one

page_text: sheet being used for each revolution of the cylinder. Instead of connect-
ing the pencil or marker with the hand or pointer of a steam, pressure,
or vacuum guage of the usual description, I prefer in some cases to
connect it by means of a floater or other suitable appliance with mercury
guages or barometers as well as with water guages, so that the variations
in the pressure of water or steam, air or other gases may in such cases
be registered or graphically denoted in a. similar manner to the one
heretofore described.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Bernard Isangk in the Great Seal Patent Office
on the 1st March 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BERNARD
ISANGK, of 3, Ile Lacroix, in the City of Rouen, in the Empire of
France, Civil Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of September, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Bernard Isangk, Her special licence
that I, the said Bernard Isangk, my executors, administrators, and
assigns, or such others as I, the said Bernard Isangk, 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 APPARATUS
FOR INDICATING AND REGISTERING THE PRESSURE OF STEAM OR OTHER GASES OR
LIQUIDS," upon the condition (amongst others) that I, the said Bernard
Isangk, 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 Bernard Isangk, do hereby declare
the nature of my said Invention, and in what manner the same is to

page_text: be performed; to be particularly described and ascertained in and by
the following statement, and accompanying Sheet of Drawings:-
This Invention has for its object to provide appropriate means or
appliances for registering the variations of the pressure of steam or other
gases in boilers or other generators, so as to indicate by means of a
curve or continuous line the various pressures of such steam or other
gases during certain stated periods or spaces of time. To this end I
provide a case or box made of iron, tin, or other appropriate material,
which may be locked or unlocked as required, containing a clockwork
fitted with hands and a dial plate for denoting the hours and minutes,
and having a suitable aperture closed with a piece of glass or other
transparent material over the dial plate. To the axis or spindle of the
said clockwork I fit or attach a cylinder or cylindrical casing, upon the
surface of which I fix a sheet of paper or other suitable material, upon
which are ruled two series of lines perpendicular to each other; in one
direction there may be either twenty-four, twelve, or such other number
of lines as correspond to the number of hours of the period during which
the pressure is to be registered, and at right angles to these there may
be another series of lines drawn in such a manner that the distances of
or spaces between any two successive lines represent or correspond to
either one pound on every square inch, one atmosphere, or such other
unit of pressure as may be used or employed in each case or instance.
To the hand or pointer of the steam or pressure guage of the boiler or
generator I fit or attach one end of a connecting rod or other suitable
link, with the other end of which I connect a pencil case or other
appropriate appliance for holding or carrying a pencil or marker, and
which pencil case may be fitted with antifriction rollers and work within
a groove or guide pieces attached to the inside of the case or box con-
taining the clockwork and the cylinder fitted to the axis or spindle
thereof in such a manner as to perform one complete revolution in either
twenty-four, twelve, or such number of hours as may be required, so
that the pencil or marker held by or enclosed within the pencil case may
describe upon the paper a continuous line or curve denoting the exact
pressure of the steam or gas throughout the period or space of time
during which the guage is acted or worked upon by the steam or gas
contained in the boiler or generator to which it is fitted.
By a modification in the arrangement described I so fit or attach one

page_text: a roller or pulley placed within the aforesaid box or case, and so attach
the other end of this roll to the cylinder or cylindrical casing that the
said cylinder may during each revolution take or roll up a certain length
or portion of this roll in such a manner that the line or diagram drawn
by the pencil or marker may denote the pressures during any desired
length of time, either days or weeks, instead of being confined to a stated
number of hours, as in the case of one sheet being used for each revolu-
tion of the cylinder. Instead of connecting the pencil or marker with
the hand or pointer of a steam, pressure, or vacuum guage of the usual
description I prefer in some cases to connect it by means of a floater or
other suitable appliance with mercury guages or barometers, as well as
with water guages, so that the variations in the pressure of water or
steam, air or other gases may in such cases be registered or graphically
denoted in a similar manner to the one heretofore described.
In the accompanying Sheet of Drawings, Figure 1 shews an appa-
ratus constructed according to my Invention in 'elevation connected
with a steam guage of ordinary construction. In this illustration the
lid or cover of my apparatus is shewn in an open position, so as to
'exhibit more clearly the mode or manner in which the various parts or
organs of the apparatus are connected with one another as well as with
the steam guage. The box or casing of the apparatus I prefer to make
of iron, brass, or any other suitable metal, the body A of the casing
being solid, and connected with or attached to the boiler or generator B
by means of bolts or screws passing through lugs a, a, whilst the lid or
cover C of the box or casing A, being likewise by preference made of
metal, is furnished with a pane of glass or other suitable transparent
material D, through which all that is going on at any time within the
casing may be perceived at a glance, or which may face only the dial
plate of the timepiece, the remaining part of the lid or cover being solid,
also with a lock c and a key d, by means of which the box or casing
may be opened or closed as required. Within the box or casing A I
place or fix a suitable clockwork or timepiece E of ordinary construction
furnished with a dial plate and hands e. To the central axis or spindle
of the clockwork E I so fit or attach the cylinder or cylindrical casing F
as to cause the same to perform or describe a complete revolution within
a certain lapse of time, which in the instance shown in Figure 1 would
be equal to twenty-four hours. To the hand or pointer H of the steam,

page_text: pressure, or vacuum guage G I fit or attach a connecting rod or link I
passing through the side of the casing A nearest to the guage by an
aperture i, and being by appropriate means connected with or attached
to the pencil case K, which I so construct as to cause it to travel with
facility upon a rectilineal guide or rail L properly fitted within the
casing or box A and furnished with a suitable bevilled or square groove
or projection in such a manner as to cause the way described or travelled
over by the pencil case K within or upon the rail L accurately to
correspond with the motion performed by the guage hand or pointer H
upon its axis or pivot. Within the pencil case K I place or fix a
suitable pencil or marker, and around the cylinder or cylindrical casing
FI fit or attach a paper M, upon which are drawn longitudinal lines
denoting the units of time and transverse lines denoting the units of
pressure corresponding to those shewn upon the dial plate J of the steam
or pressure guage G in such a manner that by the rectilineal motion of
the pencil case K the pencil or marker fixed therein is caused to describe
a certain curve or diagram, by means of which the variations in the
pressure of the steam or gas in the generator are accurately denoted or
registered throughout the time during which the hand or pointer of the
guage is in motion.
In the illustration, Figure 2, I have shewn the manner in which a
paper M (Figure 1) may be divided by means of longitudinal lines A
denoting the units of time, which in this instance are the twelve hours
before and after noon respectively, and transverse lines B denoting the
units of pressure, such as, for instance, atmospheres, pounds per square
inch, or kilogrammes per square centimètre, or any other units
corresponding to those marked upon the dial plate of the steam, pressure,
or vacuum guage.
In Figure 3 I have shewn the manner in which diagram papers
similar to the one shewn in Figure 2, but of indefinite length, may be
used or employed to mark or register the variations in the pressure of
steam or gases during any desired length of time. In this illustration
an apparatus constructed for this purpose is shewn in cross section,
nothing however being visible here of the 'guage itself save the hand or
pointer H thereof. With this hand or pointer the pencil case K is
suitably connected in a manner similar to the one shewn in Figure 1,
so that the pencil or marker fixed within the case K may describe a

page_text: continuous line or diagram upon the paper fitted or attached to the
cylindrical casing F. Beneath or near this casing I so fit a roll of
paper M upon a fixed roller or drum N as to pass on to and be rolled up
by the cylinder so long as it remains in motion, so that the pencil
describes a curve or diagram denoting the variations of pressure upon
the whole length of paper rolled up by the cylinder.
With a view to register the variations in the pressure of steam or other
gases as denoted by mercury guages or barometers, as well as those in
the pressure or in the rising or falling of the level of water, I prefer to
connect the pencil case of an apparatus constructed according to my
Invention with a floater or other suitable appliance, whereby curves or
diagrams may be produced upon limited or indefinite lengths of paper
denoting the variations aforesaid in a similar manner to the one described
in connection with the Figures 1 and 3.
Having now described the nature of my said Invention, and illustrated
the same in the accompanying Sheet of Drawings, I wish it to be
understood that I do not claim the use or employment' of mechanical
means or appliances generally for registering the variations of pressures
as denoted by steam, pressure, or vacuum guages; but what I do
claim is,
First. The use or employment of timepieces connected with and
operating the rotation of cylinders or cylindrical casings and diagram
papers worked upon by pencils or markers connected with the hand or
pointer of a steam, pressure, or vacuum guage, in the manner heretofore
described and illustrated in the annexed Sheet of Drawings.
Secondly. The use or employment of a rail fitted within the casing of
the apparatus for securing the rectilineal motion of the pencil or marker
in connection with the motion of the hand of the guage, as shewn in
Figure 1 of the annexed Sheet of Drawings.
Thirdly. The drum arrangement described in the foregoing and
illustrated in Figure 3 of the accompanying Drawings, for producing
diagrams of indefinite length, registering the variations in the pressures
of steam or other gases or liquids.
Fourthly. The mode or manner described in the foregoing of con-
necting the pencil or marker of an apparatus constructed according to
my Invention with a floater connected with a mercury guage, barometer,

page_text: or water guage, for the purpose of registering the variations in the
pressures or levels of all kinds of gases or liquids.
In witness whereof, I, Bernard Isangk, have hereunto set my hand
and seal, this Twelfth day of February One thousand eight
hundred and seventy.
Witness,
JOSEPH THEODORE DANN,
3, Cancell Road, S.W.
(L.S.) BERNARD ISANGK.