IMPROVEMENTS IN GAS METERS
Year: 1849

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
LIZARS, of Paris, in the Republic of France, Engineer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Fifteenth day of
December, One thousand eight hundred and forty-nine, in the thirteenth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Charles Lizars, my exors, admors, and assigns, Her
especial licence, full power, sole privilege and authority, that I, the said
Charles Lizars, my exors, admors, and assigns, and such others as I, the
said Charles Lizars, my exors, adñññors, or assigns, should at any time
agree with, and no others, from time to time and at all times during the
term of years therein expressed, should and lawfully might make, use,
exercise, and vend, within England, Wales, and the Town of Berwick-upon-
Tweed, the Invention of "IMPROVEMENTS IN GAS METERS," communicated to me
from abroad; in which said Letters Patent is contained a proviso that I, the
said Charles Lizars, should cause a particular description of the nature of the
said Invention, and in what manner the same is to be performed, by an instru-
ment in writing under my hand and seal, to be inrolled in Her said Majesty's
High Court of Chancery within six calendar months next and immediately
after the date of the said in part recited Letters Patent, as in and by the
same, reference being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Charles Lizars, do hereby declare that the nature of the said Invention,

page_text: and in the manner the same is to be performed, are fulled described and
ascertained in and by the following statement thereof, reference being had to
the Drawing hereunto annexed, and to the figures and letters marked thereon,
that is to say :-
The Invention consists of a mode of arranging diaphragms in dry meters,
and in a mode of constructing and arranging rotary and excentric valves for
gas meters. But in order that the Invention may be fully understood, I will
proceed to describe the Drawing, in which Figure 1 is a vertical elevation of
a gas meter, having the rotary valve applied thereto. Figure 2 represents a
plan; Figure 8 shews the cover or top of the valve, which is moveable.
Figure 4, the lower part of the valve, and Figure 5 is a section of a gas meter,
shewing the arrangement of the diaphragms. In this Figure A, A, repre-
sent the two conical compartments, each divided by a diaphragm B, B.
C, C, are vertical rods, which serve as axes to the diaphragms. D, D, shew
the manner of attaching the diaphragms. E is a partition which separates
the conical compartments from each other. F, F, is a rod attached to the
cover of the valve, and through which the movement of the cover takes place.
G, G,. is a slot for guiding the rod. H, H, is a crank, the movement of
which communicates the movement to the top of the valve. I is the top or
cover. J, J, is the lower part of the valve, in which it will be seen there are
five openings, four of which are marked K, and they communicate with the
conical spaces on either side of the diaphragms, and the one marked L com-
municates with the passage M, which is the opening of the pipe through
which the gas passes to the valve, and which pipe continues to the centre
opening of the valve L, and conveys the gas to the openings K, K, K, K, by
means of the hollow part left in the cover Figure 3, the gas arriving in this
hollow part of the cover after passing through the pipe M, and descends by
one or two of the openings K, K, K, K, according to the position of the
cover when the gas is descending by one or two of the openings K, K, and
entering the cones of the diaphragm or diaphragms on one side, the gas is
forced out on the opposite side of the said diaphragm (and which has been
measured) through the other openings in the valve K, K, and which has been
left uncovered This action is according to the position of the cover, Figure
3, each opening K, K, K, K, serving alternately as inlet and outlet for
the gas.
Having thus described the nature of the said Invention, and the manner of
performing the same, I would have it understood that I do not confine myself
to the precise details herein given, so long as the peculiar character of the
Invention be retained. But what I claim is, the mode of arranging dia

page_text: phragms in dry meters; and secondly, the mode of arranging and working
the valves of gas meters, as herein described.
In witness whereof, I, the said Charles Lizars, have hereunto set my
hand and seal, this Seventh day of June, in the year of our Lord One
thousand eight hundred and fifty.
Taken and acknowledged by Charles
Lizars, (party hereto), at Paris, in
the Republic of France, this 7th
day of June, 1850, before me,
CHARLES (L.S.) LIZARS.
A.
This is the Specification referred to in the Affidavit of William Henry
Ritchie, sworn before, this 11th day of June, 1850.
HENRY MOWBRAY.
William Henry Ritchie, of Old Square, Lincoln's Inn, in the County of
Middlesex, Gentleman, maketh oath and saith, that he is acquainted with
the manner and character of the handwriting of Thomas Pickford, Her
Britannic Majesty's Consul at Paris, in the Republic of France; and this
Deponent further saith, that the signature "Thomas Pickford," set, subscribed,
or written in the margin of the Specification hereunto annexed, marked A.,
and dated the Seventh day of June instant, and purporting to be executed
by Charles Lizars, of Paris, in the Republic of France, Engineer, whereby it
is stated that the said Specification was acknowledged by him, the said
Charles Lizars, before the said Thomas Pickford, on the said Seventh day of
June, at Paris aforesaid, is of the proper handwriting of the said Thomas

page_text: AND BE IT REMEMBERED, that on the oath of William Henry
Ritchie, the Specification aforesaid was enrolled, word for word, as above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
Elle the Triftoouth dase of Inno in the woof Load On
Enrolled the Fifteenth day of June, in the year of
thousand eight hundred and fifty.
Lord One