IMPROVEMENTS IN APPARATUS FOR MEASURING THE DELIVERY OF GASEOUS FLUID OR OTHER CURRENTS
Year: 1872

page_text: LETTERS PATENT to Victor Bablon, of No. 40, Rue du Roi-de-Sicile,
Paris, France, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR MEASURING THE DELIVERY OF GASEOUS FLUID OR OTHER CURRENTS."
Sealed the 13th August 1872, and dated the 28th February 1872.
PROVISIONAL SPECIFICATION left by the said Victor Bablon at the
Office of the Commissioners of Patents, with his Petition, on the
28th February 1872.
I, VICTOR BABLON, of No. 40, Rue du Roi-de-Sicile, Paris, France,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN APPARATUS FOR MEASURING THE DELIVERY OF GASEOUS FLUID OR OTHER
CURRENTS," to be as follows:-
The object of the present Invention is to instantly indicate or measure
the delivery of gaseous or fluid currents. This is effected in the
following manner :-The gas or other current is admitted through a tap
or taps of variable orifices (to be employed at will) into a chamber, the
pressure of the current in the chamber being indicated by a manometer,
from thence it passes through a tap below the burner, and the pressure

page_text: of supply thereto is indicated by another manometer, thus both the
pressure of the current in the chamber and the pressure of supply to the
burner, are both indicated by separate manometers.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Victor Bablon in the Great Seal Patent Office on
the 22nd August 1872
red by the said victor Dation in the Great Deal fatent Unice on
the 22nd August 1872
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, VICTOR
BABLON, of No. 40, Rue du Roi-de-Sicile, Paris, France, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of February,
in the year of our Lord One thousand eight hundred and seventy-two,
in the thirty-fifth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Victor Bablon, Her
special licence that I, the said Victor Bablon, my executors, adminis-
trators, and assigns, or such others as I, the said Victor Bablon, 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 MEASURING THE DELIVERY OF GASEOUS
FLUID OR OTHER CURRENTS," upon the condition (amongst others) that I,
the said Victor Bablon, 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 immediately after the date of the
said Letters Patent.

page_text: be performed, to be particularly described and ascertained in and by the
following statement and accompanying Drawings, that is to say :-
The object of the present Invention is to instantly indicate or measure
the delivery of gaseous fluid or other currents. This is effected in the
following manner:-The gas or other current is admitted through a tap
or taps of variable orifices (to be employed at will) into a chamber, the
pressure of the current in which is indicated by a manometer; from the
chamber it passes through a tap below the burner, and the pressure of
supply thereto is indicated by another manometer, thus both the
pressure of the current in the chamber and the pressure of supply to the
burner are both indicated or measured by separate manometers. The
gas or other current is admitted into the chamber through an orifice at
one side thereof, at a fixed and determined pressure derived either from
a gas meter or pressure gauge, and escapes at the other side of the
chamber through an orifice of variable dimensions, the variations of
pressure thus produced being in conformity with the expenditure. As
long as the orifice of flow is not larger than that of supply the pressure
in the chamber is the same as at the source of delivery, but as soon as
the aperture is enlarged the flow increases more rapidly than the
supply; decreasing the pressure in the chamber, which is marked by a
manometer, showing the rate of flow.
Fig. 1 of the accompanying Drawings is a vertical section of the
apparatus above referred to. A chamber A. receives the gas or other
current by the tap B, thence it passes through the tap C, which delivers
it to the test burner D. A manometer M shows the amount of pressure
in the chamber A.; another manometer N shows the pressure of supply
to the burner D. The gas is led by the pipe P under a constant
pressure derived as before stated either from a gas meter or pressure
gauge. The tap B determines the section of the orifice by which the
gas is admitted to A; this section is such that (the smallest delivery it
is desired to measure to the burner D) although at the extreme limit
does not form a barrier, but which it would do for the least augmentation
of expenditure. At this juncture an increase of expenditure at D would
produce a corresponding decrease of pressure at A, which would at
once be indicated or measured. As this nice setting of the tap B
may present a little difficulty, it is preferable in practice at first to close
it in such wise that to measure the smallest delivery the pressure
should be weaker by 10, for example at A than at P.

page_text: 4. If the photometric test precedes all other operations, the burner
being prepared for the requisite lighting power by means of the tap C,
the manometer M indicates the corresponding expenditure at this
degree of intensity of illumination.
As just shown the graduation of the apparatus would not be complete,
the delivery being too limited; I therefore proceed in the following
manner-In the position now occupied by the tap B, the greatest
delivery possible is 100 litres at a pressure of 1 centimetre in the
chamber A; therefore new positions are given to the taps B and C,
so that the pressure at A being raised to 9 centimetres, the expenditure
shown by the indicator, which is now replaced on the conduit pipe P,
still marks 100 litres; I then proceed with a fresh series of gradual
openings of the tap C, occasioning successive increases of delivery
of from 5 to 5 litres. The consumption shown by the indicator is
marked in accordance to the corresponding positions of the manometer
M on a second scale at the side of the first, and when the pressure
has again fallen to 1 centimetre at A the operation just performed
is repeated by again increasing the pressure to 9 centimetres by means
of the tap B, whilst at the same time maintaining the expenditure
by aid of the tap C at the new maximum obtained; and this is
continued until the maximum of delivery of which the apparatus is
susceptible is attained; this is reached when the tap C is completely
open, and the pressure at A is still 9 centimetres. If for instance 3
successive operations have been made to attain this maximum, they
would occasion 3 successive graduations, marked side by side on the
scale of the manometer M, and these 3 graduations would have as
starting points 3 different positions of the tap B, or they may be
represented and replaced by 3 orifices of different dimensions, made
in diaphragms which would be arranged in succession along the passage
of the gas in place of the tap B. But it is more convenient to place
the diaphragms in three taps so arranged as to admit of the passage of
the gas or arrest it at will.
The form the apparatus would then take is shown in vertical section
by Fig. 2. The gas led by the pipe P under a constant pressure of 10
centimetres traverses successively three taps a, b, c, before reaching
the chamber A; it then meets the tap C, which delivers it at the desired

page_text: to a segment pierced with an aperture, whose diameter increases in
each tap. In the first position of the key the segment allows the gas
to pass, as shown by the taps b and c; in the second position the
segment interrupts the passage as shown by a. The manometer M,
which reproduces the pressures of the chamber A, bears a graduation
with respect to which are 3 series of figures a¹, b', c¹, corresponding with

page_text: grouping them in any suitable manner according to the nature of use
to which it is destined.
In witness whereof, I, the said Victor Bablon, have hereunto
set my hand and seal, this Eighteenth day of August, in the
year of our Lord One thousand eight hundred and seventy-
two.
VICTOR BABLON. (L.S.)