Year: 1898

page_text: I, WILLIAM KITSON STENT, of 158, Queen Victoria Street, in the City of
London, Managing Director of the Mantleless Incandescent Gas Corporation
Limited, do hereby declare the nature of this invention to be as follows;-
This invention relates to gas burners of the Argand type, in which heated
air is introduced to the gas at the point of combustion, to effect maximum in-
candescence of the resulting flame, and consists of improvements whereby a
portion of such heated air current is directed as a protecting and scouring
envelope around the internal periphery of the inside chimney, thus preventing
the direct impingement of the flame thereon, and the gradual deposit thereon of
discolouring inatter, which effect has been found to be a great drawback to all
burners adapted as heretofore to burn gas at its point of maximum incandescence.
To carry my invention into effect I find it is necessary that a considerable
portion of heated air shall as heretofore, be allowed to impinge directly upon
the gas jets at the point of their combustion, in order to still maintain high
incandescence, but at the same time without losing the maximum incan-
descence, required, I split the ascending stream of hot air by a cone, so
adapted to the grid-like opening upon which it rests, that a portion, say about
one third, of the total hot current, is directed vertically upwards as a scouring
envelope about the internal periphery of the inner chimney, and thus between
the said chimney and the flame.
The intensity, of the scouring current thus set up within the inner chimney
and its volume, is made proportionate to the quantity of gas which the burner
is designed to consume.
The effect of such diverted current of hot air entirely enveloping the interior
periphery of the inner chimney, is effectually to prevent the deposit of discolour-
ing matter thereon, whereby probably increasing the perfection of combustion,
and with the maintenance of the desired high intensity of incandescence.
This invention is applicable to all systems of burning gas in Argand burners
of whatever design, when the air is heated before being led to the flame by
means of double chimneys or cylinders or by any system of hot air chambers.
Dated this 12th day of September 1898
FELL & JAMES,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.

page_text: Limited, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:
_
This invention relates to gas burners of the Argand type, in which heated
air is introduced to the gas at the point of combustion, to effect maximum in-
candescence of the resulting flame, and consists of improvements whereby a
portion of such heated air current is directed as a protecting and scouring
envelope around the internal periphery of the inside chimney, thus preventing
the direct impingement of the flame thereon, and the gradual deposit thereon of
discolouring matter, which effect has been found to be a great drawback to such
burners adapted as heretofore to burn gas at its point of maximum incandescence.
To carry my invention into effect I find it is necessary that a considerable
portion of heated air shall, as heretofore, be allowed to impinge directly upon
the gas jets at the point of their combustion in order to still maintain high
incandescence, but at the same time without losing the maximum incan-
descence, required, I split the ascending stream of hot air by a cone, so
adapted to the grid-like opening upon which it rests, that a portion say about
one third, of the total hot current, is directly vertically upwards as a scouring
envelope about the internal periphery of the inner chimney, and thus between
the said chimney and the flame.
The intensity of the scouring current thus set up within the inner chimney
and its volume is made proportionate to the quantity of gas which the burner
is designed to consume.
The effect of such diverted current of hot air entirely enveloping the interior
periphery of the inner chimney is effectually to prevent the deposit of discolour-
ing matter thereon, thereby probably increasing the perfection of combustion
and with the maintenance of the desired high intensity of incandescence.
This invention is applicable to all systems of burning gas in Argand burners
of whatever design when the air is heated before being led to the flame by
means of double chimneys or cylinders or by any system of hot air chambers.
And in order that my invention may be the better understood, I now proceed
to describe the same in relation to the drawing hereto annexed and to the
letters and figures marked thereon.
Figure 1 is a sectional elevation of a known double chimney Argand gas
burner, with my improved air current dividing device applied thereto.
Figures 2 and 3 are an elevation and plan of the said dividing air current
device as a detached detail.
A is the burner of the usual Argand type with small exits for a series of gas
jets surrounding it. B is the inner chimney and C is an outer chimney down
which passes a heated supply of air to the underside of the burner. This heated
air is in major part permitted to pass through the grated support D) of the inner
chimney B to the outer part of the flame.
I consider the obscuration of the inner chimney to be caused by the inductive
attraction of the upward hot air current to the gas jets issuing at a high velocity
from the ring burner A, thus causing an eddy or slackness of air current against
the internal surface of the inner chimney B tending to form the light-obscuring
deposit as described which soon diminishes the efficiency of the light.
I therefore apply an air current dividing device E resting upon the grated
support D of the inner chimney and dividing such upward current into three
parts as shown by an arrow. The inner part (about 2/3rds of the volume) still
impinges on the gas jets both inside and outside at their point of issue, which
is necessary for the maintenance of the luminosity, and is still more perfectly
induced so to do by the upper lip F of my dividing device or ring being bent
inwards towards the flame.
The outer portion of the ascending hot air current about 1/3rd of its total
volume is guided by my dividing ring E so as to travel vertically upwards,

page_text: sweeping the internal surface of the inner chimney thus preventing the deposit
thereon and by its high temperature completely consuming any smoke or un-
consumed particles of carbon that would otherwise remain there as coloured
deposit.
The ring E is provided at its lower edge with any suitable number of ex-
tended fingers according to the pattern of burner fitting within an external
flange K of the grate D, so that the said dividing ring, may be accurately
placed and maintained in the required position relatively to the burner.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1st. In a regenerative Argand burner with double chimneys, an air current
dividing ring placed in the bottom of the ascending current of hot air and
below the burner, having means to render firm its required position to the
burner, so that a portion of such current may be diverted from impinging
on the issuing gas jets, but may be caused to travel along and sweep the internal
periphery of the inner chimney, to prevent the deposition thereon of any
smoke, soot or discolouring matter, substantially as described.
2nd. In a regenerative Argand burner the combination with an outer glass
chimney, standing upon a platform surrounding an Argand burner, having a
central cold air admission orifice, and an inner glass chimney supported by a
grid attached to said burner, of a thin metal ring, supported on said grating,
dividing the ascending current of heated air, as and for the purposes substan-
tially as described.