CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OF GAS APPARATUS FOR THE PREVENTION OF FRAUD AND FOR ECONOMISING THE CONSUMPTION OF GAS
Year: 1862

page_text: LETTERS PATENT to John Raywood, of Sheffield, in the County of York,
for the Invention of "CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OF GAS
APPARATUS FOR THE PREVENTION OF FRAUD AND FOR ECONOMISING THE
CONSUMPTION OF GAS."
Sealed the 20th March 1868, and dated the 25th September 1862.
PROVISIONAL SPECIFICATION left by the said John Raywood at the
Office of the Commissioners of Patents, with his Petition, on the 25th
September 1862.
I, JOHN RAYWOOD, of Sheffield, in the County of York, do hereby declare
the nature of the said Invention for "CERTAIN IMPROVEMENTS IN THE CONSTRUC-
TION OF GAS APPARATUS FOR THE PREVENTION OF FRAUD AND FOR ECONOMISING THE
CONSUMPTION OF GAS," to be as follows:-
In the outlet of the meter I place a cross bar or perforated plate to prevent
the drum of the meter being interfered with. In the socket or burner holder
I insert a small perforated tube having a plate in the middle. to prevent the
gas rushing directly to the burner; it has to pass through the lower part of
the perforated tube and re-enters above the plate before coming into the
burner, and the burner is form'd by having a corresponding or similar opening
at each end.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Raywood in the Great Seal Patent Office on the 25th
March 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
RAYWOOD, of Sheffield, in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of September, in the year of our
Lord One thousand eight hundred and sixty-two, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Raywood, Her special licence, that I, the said John Raywood,
my executors, administrators, and assigns, or such others as I, the said John
Raywood, 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
terin 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 "CERTAIN IMPROVEMENTS IN THE
CONSTRUCTION OF GAS APPARATUS FOR THE PREVENTION OF FRAUD AND FOR ECONO-
MISING THE CONSUMPTION OF GAS," upon the condition (amongst others) that I,
the said John Raywood, 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 John Raywood, do hereby declare the
nature of my said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
that is to say:-
My improvement consists in directing and regulating the supply of gas to
the burner, and I propose to accomplish the sanie in the following manner:-
Enclosed in an outer casing, of any suitable form or dimensions, and of any
suitable material, I insert one or more perforated tubes, of zinc or other
material, or of wire gauze or netting, in which I place a solid plate or
diaphram at a proper distance from the bottom of the casing, so that when
the gas comes in contact with or against the under side of the plate it is
forced through the apertures of the perforated tube immediately below the
plate into the outer case or socket, and it has then to re-enter or pass through
the perforations of the tube above the plate before it gets to the burner or tip,

page_text: thus breaking the rush or force, but not diminishing the supply, and producing
a steady and a better light, and preventing the noise and waste of overdue
pressure.
In order to render this description more clear and intelligible I have to
this Specification appended the accompanying Drawings, the object of which
is, however, to show the general nature and construction and combination of
the different parts and to exhibit the different parts as a whole in their prin-
ciple and action; but I wish it to be understood that I do not intend to
confine myself to the exact detail of figure, shape, and combination therein
shewn, as it is evident that, retaining the leading principles of the Invention,
many of the parts may be substituted by other well-known equivalents and
JOHN RAYWOOD. (L.S.)