IMPROVED APPARATUS IN OR BY WHICH COAL GAS CAN BE BURNT ALONE, OR ENRICHED BY ADMIXTURE WITH HYDROCARBON VAPOUR, SAID APPARATUS SERVING ALSO AS A SMOKE CONSUMER AND APPLICABLE TO ORDINARY GAS FITTINGS CARRYING "COMET" OR LIKE WIDE MOUTHED GLOBES OR SHADES
Year: 1883

page_text: LETTERS PATENT to Alfred Perkins of 123 Uxbridge Road Shepherds Bush
in the County of Middlesex Gas Engineer and Ironmonger for an Invention of
IMPROVED APPARATUS IN OR BY WHICH COAL GAS CAN BE BURNT ALONE, OR
ENRICHED BY ADMIXTURE WITH HYDROCARBON VAPOUR, SAID APPARATUS
SERVING ALSO AS A SMOKE CONSUMER AND APPLICABLE TO ORDINARY GAS
FITTINGS CARRYING "COMET" OR LIKE WIDE MOUTHED GLOBES OR SHADES
PROVISIONAL SPECIFICATION left by the said Alfred Perkins at the Office
of the Commissioners of Patents on the 12th February 1883.
"
ALFRED PERKINS of 123 Uxbridge Road, Shepherds Bush in the County of
Middlesex, Gas Engineer and Ironmonger IMPROVED APPARATUS IN OR BY WHICH
COAL GAS CAN BE BURNT ALONE OR ENRICHED BY ADMIXTURE WITH HYDROCARBON
VAPOUR, SAID APPARATUS SERVING ALSO AS A SMOKE CONSUMER AND APPLICABLE
TO ORDINARY GAS FITTINGS CARRYING "COMET" OR LIKE WIDE MOUTHED GLOBES
OR SHADES "
The object of this Invention is the construction or arrangement of apparatus to
be fitted to an ordinary gas chandelier and fittings adapted for carrying "Comet "
globes, said apparatus being so arranged that coal gas can pass through pipes to a
hydrocarbon substance containing vessel and be heated in its passage by the heat
from the flame and be thus available for mixing with the vapour arising from the
hydrocarbon substance, the mixture then passing down another pipe to the burner
to be consumed.
The pipes form the support to the hydrocarbon vessel, which is so fitted above as
to act as a smoke consumer and is of such a size that the ordinary comet globe can
be passed over to be lodged upon the gallery supports. Instead of the comet globe
being fitted any other globe suitable for the purpose can be used or in some cases
shades for diffusing or for concentrating the light can be fitted.
The tap by which the flow of the gas is regulated is constructed as to turn the
gas through a pipe to burn gas only or an admixture of hydrocarbon vapour and
gas, or to extinguish the light,

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alfred Perkins in the Great Seal Patent Office on the 11th August
1883.
ALFRED PERKINS of 123 Uxbridge Road Shepherds Bush in the county of
Middlesex Gas Engineer and Ironmonger IMPROVED APPARATUS IN OR BY WHICH
COAL GAS CAN BE BURNT ALONE OR ENRICHED BY ADMIXTURE WITH HYDRO-CARBON
VAPOUR SAID APPARATUS SERVING ALSO AS A SMOKE CONSUMER AND APPLICABLE
TO ORDINARY GAS FITTINGS CARRYING " COMET OR LIKE WIDE MOUTHED GLOBES
OR SHADES
The object of this invention is the construction or arrangement of apparatus to
be fitted to ordinary gas chandeliers and fittings adapted for carrying the comet
globes said apparatus being so arranged that coal gas can pass-through pipes to a
hydro-carbon substance containing vessel and be heated in its passage by the heat
from the flame and be thus available for mixing with the vapour arising from the
hydro-carbon substance, the mixture then passing down another pipe to the burner
to be consumed.
A A of the annexed drawings represent the outside of the carburetting chamber
of which 5, 5, forms the base which is joined to the sides so as to withstand the
heat from the flame. To prevent the carburetting chamber being overheated and
consequently burning the hydrocarbon substance contained therein a second and
false bottom 6, 6, 6 is fastened loosely under the base 5, 5, and forms a shield to it
from the heat of the flame said false bottom being hid by an ornamental-fringe or
curtain of metal fixed round same.
The hydrocarbon substance to be consumed with the gas is inserted through an
aperture at the top of the carburetting chamber which aperture is covered by the
screw cap B which is screwed tightly down on a seating of vulcanized fibre or
other substance available to withstand the heat, inserted as a washer in the said
cap. The gas to be burned passes through the tap F at the base of the apparatus
and up the tube C, C, C, to the top of the curve in the continuous pipe C, C, C,
D, D, D, which pipe at the said top of the curve is indented or partially stopped to
prevent the free passage of the gas at the point 3; on each side of this stoppage or
indentation is drilled a hole 1 and 2.
The gas passing up C, C, C, and meeting the partial obstruction 3 a portion is
forced through the hole 1 into the heated carburetting chamber AA where it mixes
with the heated vapour of the hydro carbon substance in the said chamber and
becoming heated passes out of the said chamber through the hole 2 and meeting
and again mixing with the gas which has passed through the obstruction in the
pipe without entering the carburetting chamber the whole passes round the curve
and down the pipe E, E, E, at the junction 4, to the burner H,. The said holes 1
and 2 in the pipe C, C, C, D, D, D are so proportioned to the partial obstruction 3
that no more gas can pass through them to be carburetted than that portion of gas
which passes directly through the obstruction 3, has power to thoroughly consume
thereby becoming to a large extent self regulating with the varying pressures of gas
and the light becomes sufficiently carburetted without being overcharged and smoky.
For the purpose of demonstrating the difference between the illuminating power of
the gas only and the carburetted gas the tap F is so made that when turned so that
the arrow points upright the gas passes directly up the tube D, D, D and enters the
tube E, E, E, at the junction 4 passing down to the burner H without touching the
spot where the holes 1 and 2 are situated consequently burning gas only. By
turning the said arrow of the tap so that it points to the left the light is

page_text: extinguished at once. The carburetting chamber being situated and supported at
the top of the tubes C, C, C, D, D, D, E, E, E, forms a ceiling shade and smoke
consumer and when the globe rests on the globe holder G, G, which is connected
with the tubes C, C, C, D, D, D, and a coronet is placed on the top of the globe an
ornamental and tasteful result is produced and the light is deflected down on
objects beneath
When the apparatus is required to burn enriched gas only the tube D, D, can
be carried to the burner direct in which case the tube E will not be necessary:
Having thus described the nature of my said invention and in what manner the
apparatus is made and constructed I hereby declare that I make no general claim
to enriching gas by admixture thereof with the vapour of hydro-carbon substances
nor to carburetting apparatus generally but I do claim 1. The combination of a
ceiling shade smoke consumer with the carburetting chamber and the shielding of
the same from the too great heat of the gas flame by means of the false bottom as
shown in the annexed drawings. 2 The arrangement of the continuous tube C, C, C,
D, D, D, and the indentation and perforation thereof by which means it becomes
self regulating, and 3 the general formation whereby the apparatus is adapted to
carry the ordinary Comet or Christiana globe.
In witness whereof I the said Alfred Perkins have hereunto set my band and
seal this tenth day of August in the year of our Lord One thousand eight hundred
and eighty three
Witness
H GARDNER
Patent Agent
166 Fleet St
London
A PERKINS (LA)