A NEW AND IMPROVED REGU- LATOR FOR GAS
Year: 1855

page_text: LETTERS PATENT to David Dick, Engineer, of Paisley, in the County of
Renfrew, in Scotland, for the Invention of "A NEW AND IMPROVED REGU-
LATOR FOR GAS."
Sealed the 20th June 1856, and dated the 22nd December 1855.
PROVISIONAL SPECIFICATION left by the said David Dick at the Office
of the Commissioners of Patents, with his Petition, on the 22nd.
December 1855.
I, DAVID DICK, Engineer, of Paisley, in the County of Renfrew, in Scotland,
5 do hereby declare the nature of the said Invention for "A NEW AND IMPROVED
REGULATOR FOR GAS" to be as follows; and consists of an apparatus for
regulating the pressure & consumption of gas, by means of attaching a small
quantity, of mercury or other fluid moving with the apparatus, and so closing
..or opening the end of the inlet pipe (the mouth of-which is sloped or square
O at the orifice as most suitable), to regulate the supply in accordance with the
demand at one uniform pressure. The cup containing the mercury or other
fluid is suspended from the roof of a gas holder, fitting loosely in an outside
shell to which the outlet pipe is attached. The gas holder floats in water, oil,
or other suitable medium, & rises or falls according to the number of gas lights
5 put.in. operation.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said David Dick in the Great Seal Patent Office on the 20th
June 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
DICK, Engineer, of Paisley, in the County of Renfrew, in Scotland, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-second day of December, in the year of our
Lord One thousand eight hundred and fifty-five, in the nineteenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said David Dick, Her special licence, that I, the said David
Dick, my executors, administrators, and assigns, or such others as I, the
said David Dick, 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 "A
NEW AND IMPROVED REGULATOR FOR GAS," upon the condition (amongst others)
that I, the said David Dick, my executors or administrators, by an instru-
ment in writing under my, or his, or their, or one of their hands and scals,
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 David Dick, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, that is to say:-
My Invention is exemplified by the following description and Drawings,
and consists in the adaptation of a small quantity of mercury or other liquid
moving with the apparatus, and so closing and opening the end of the inlet
pipe, (which is bevelled or square at the orifice as may be most suitable), as to
regulate the supply in accordance with the demand at one uniform pressure;
thus affording an equable light and saving gas.
In the annexed Diagrams, Fig. 1 is a section of the regulator. The gas s
enters by the pipe A, the upper or outlet portion of which takes a semicircular
direction, having its orifice bevelled or chamfered and inserted into the small
cup B, which is partly filled with mercury or other fluid. The cup B is

page_text: suspended to the gas holder D, which is loosely fitted into the outside shell E,
to which the outlet pipe F is affixed. The Diagram represents the position of
the holder and cup, supposed to be supplying one jet with gas; when more
jets are put on, the gas being consumed faster than supplied through this
small aperture, the holder descends, and taking the cup with it immediately
adjusts the inlet to the supply required, Fig. 2; the gas entering through the
inlet pipe A, passes into the centre chamber G, and thence into the holder D,
through the mouth piece H, (this mouth is bevelled or chamfered, as in the
bent pipe A, Fig. 1,) and in this form enables the machine to be reduced in
size. The compound lever I is of great importance in the larger sizes of the
gas regulator, keeping the pressure uniform by counteracting the difference in
the specific gravity of the holder, as it is more or less immersed in the fluid in
the groove C. The position of the holder D, and levers I, are shewn as when
supplying one jet with gas. The weight K is moveable for adjustment to
reduce or increase the pressure of the holder. The dotted lines shew the
relative position of the levers I, and holder D, when all the jets are on.
Having thus described the nature of my Invention, and the manner in
which the same is to be performed, I wish it to be understood, that I do not
confine myself to the precise details herein given; but what I claim is, making
the mercury (or other fluid) valve moveable, with any ordinary gas holder;
the turning down & bevelling or notching the aperture through which the
gas flows to the holder; & the adjusting the pressure by the differential
lever.
In witness whereof, I, the aforesaid David Dick, have hereunto set my
hand and seal, this Sixteenth day of June, One thousand eight hundred
•
JNO. H. SWAN, Witness.
FRED. G. SWAN, Witness.
DAVID DICK (L.S.)