IMPROVEMENTS IN GAS BURNERS
Year: 1866

page_text: LETTERS PATENT to James John Shedlock, of 6, Shaftesbury Villas,
Kensington, in the County of Middlesex, Gas Engineer, for the Inven-
tion of "IMPROVEMENTS IN GAS BURNERS."
PROVISIONAL SPECIFICATION left by the said James John Shedlock
at the Office of the Commissioners of Patents, with his Petition, on the
10th February 1866.
I, JAMES JOHN SHEDLOCK, of 6, Shaftesbury Villas, Kensington, in the
County of Middlesex, Gas Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN GAS BURNERS," to be as follows:-
The objects attained by this Invention are the more perfect combustion of
the gas, the greater regularity of the flame, and a greater economy in the
consumption for a given illuminating power.
In order that the above advantages may be practically carried out an inner
chamber is provided, one end of which is closed by a cap, the other end is left
open, forming the inlet for the gas; this end is made of such a size as to fit
the gas fittings in common use. The gas enters the inner chamber, and passes
out through a hole or holes into an outer chamber, the lower end of which is
made to fit the exterior of the inner chamber. The aperture through which

page_text: the gas passes to be consumed is regulated by the outer chamber being made
to rise or fall on the inner chamber by means of a screw on the interior of the
outer chamber, and a corresponding screw on the exterior of the inner
chamber; or the interior of the outer chamber may be made to fit closely the
exterior of the inner chamber, or by any means that can be adopted for the
purpose of making a gas-tight joint between the inner and outer chambers.
The upper part of the outer chamber is made of such a size and shape that
the raising or lowering of the outer chamber on the inner chamber will
regulate the quantity of gas necessary to give the required light in a very
effectual manner. The section of the chambers may be of any form, provided
that the interior of the outer chamber shall correspond in form with the
exterior of the inner chamber. The form of the flame will of course take
the same form as the section of the chambers. When it is required to use
this burner for warming or "cooking purposes (for which it is admirably
adapted) holes or apertures are made in the bottom part of the outer chamber,
over which is fitted a ring having holes or apertures corresponding with the
holes or apertures in the outer chamber; this ring can be made to slide on the
outer chamber so that the holes or apertures in the ring may come opposite
to the holes or apertures in the outer chamber; when such is the case the
quantity of air necessary passes into the outer chamber, thus supplying oxygen
at that point of the 'flame where it is most required, whereby the heat of the
flame is much increased, and a more perfect combustion takes place.
"
When it shall be necessary to use the burners commonly called "bat's-wing
and "fish-tail," and to obtain a maximum of illuminating power with a
minimum consumption of gas, a chamber is provided having a partition with
one or more holes or apertures fitted in the interior. The cap on the upper
end has holes or apertures from which the gas passes to the flame; or it may
'be that one or more common hibs or burners are screwed into the upper part
of the chamber. The effect produced will be the same in 'all cases. I also
use a single burner having a plate fitted in 'the interior, in which is "made" a
taper hole or aperture of sufficient area 'to' supply the required quantity of gas
to the burner; or a common burner or'nib'may be screwed into a body in the
interior of which a burner of smaller capacity is fitted, and through which the
gas must 'of necessity 'pass before it can arrive at the point at which the com-
bustion takes place.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James John Shedlock in the Great Seal Patent Office on
the 10th August 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
JOHN SHEDLOCK, of 6, Shaftesbury Villas, Kensington, in the County of
Middlesex, Gas Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of March, in the year of our Lord
One thousand eight hundred and sixty-six, in the twenty-ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said James John Shedlock, Her special licence that I, the said James
John Shedlock, my executors, administrators, and assigns, or such others as
I, the said James John Shedlock, 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 " IMPROVE-
MENTS IN GAS BURNERS," upon the condition (amongst others) that I, the said
James John Shedlock, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should par-
ticularly 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said James John Shedlock, 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:-
The objects attained by this Invention are the more perfect combustion of
the gas, the greater regularity of the flame, and a great economy in the con-
sumption for a given illuminating power.
In order that the above advantages may be practically carried out an inner
chamber is provided, one end of which is closed by a cap, the other end is left
open, forming the inlet for the gas; this end is made of such a size as to fit
the gas fittings in common use. The gas enters the inner chamber, and
passes out through a hole or holes into an outer chamber, the lower end of
which is made to fit the exterior of the inner chamber. The aperture through

page_text: which the gas passes to be consumed is regulated by the outer chamber being
made to rise or fall on the inner chamber by means of a screw on the interior
of the outer chamber, and a corresponding screw on the exterior of the.inner
chamber; or the interior of the outer chamber may be made to fit closely the
exterior of the inner chamber, or by any means that can be adopted for the
purpose of making a gas-tight joint between the inner and outer chambers.
The upper part of the outer chamber is made of such a size and shape that
the raising or lowering of the outer chamber on the inner chamber will
regulate the quantity of gas necessary to give the required light in a very
effectual manner. The section of the chambers may be of any form, provided
that the interior of the outer chamber shall correspond in form with the
exterior of the inner chamber. The form of the flame will of course take the
same form as the section of the chambers. When it is required to use this
burner for warming or cooking purposes (for which it is admirably adapted)
holes or apertures are made in the bottom part of the outer chamber, over
which is fitted a ring having holes or apertures corresponding with the holes
or apertures in the outer chamber; this ring can be made to slide on the outer
chamber, so that the holes or apertures in the ring may come opposite to the
holes or apertures in the outer chamber; when such is the case the quantity
of air necessary passes into the outer chamber, thus supplying oxygen at
that point of the flame where it is most required, whereby the heat of the
flame is much increased, and a more perfect combustion takes place.
When it shall be necessary to use the burners commonly called "bat's-wing"
and "fish-tail," and to obtain a maximum of illuminating power with a
minimum consumption of gas, a chamber is provided having a partition with
one or more holes or apertures fitted in the interior. The cap on the upper
end has holes or apertures from which the gas passes to the flame; or it may
be that one or more common nibs or burners are screwed into the upper part
of the chamber. The effect produced will be the same in all cases. I also
use a single burner having a plate fitted in the interior, in which is made a
taper hole or aperture of sufficient area to supply the required quantity of gas
to the burner; or a common burner or nib may be screwed into a body, in
the interior of which a burner of smaller capacity is fitted, and through which
the gas must of necessity pass before it can arrive at the point at which the
combustion takes place.
Having thus described the nature of my Invention, I would have it under-
stood that I do not confine myself to the precise details herein given so long as
the main features of my said Invention are adhered to; but what I claim and
desire to be secured by the herein-before in part recited Letters Patent is,

page_text: the improvements in gas burners substantially as herein-before described, or
any mere modification thereof.
In witness whereof, I, the said James John Shedlock, have hereunto
set my
hand and seal, this Tenth day of August, in the year of our Lord
One thousand eight hundred and sixty-six.
JAS. J. SHEDLOCK. (L.S.)