Improvements in Incandescence Gas Lamps.
Year: 1895

page_text: Date of Applicati n, 2nd Mar., 1895
Complete Specification Left, 31st. July, 1895-Accepted, 21st Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in Incandescence Gas Lamps.
I, LOUIS DEXAYROUZE, of 70 Boulevard Victor Hugo à Neuilly (Seine)
France, Engineer, do hereby declare the nature of this invention to be, as
follows:- -
This invention relates to incandescence gas lanips and has for its object to effect
thorough mixture of the gas and air which is to form the flame of the lamp, and to
give the mixture a suitable pressure, so as to obtain such, heat of combustion as
shall render the mantle which is suspended over the flamo brilliantly incandescent.
For this purpose, within a cavity of the lamp there is mounted a fan which being
caused by any suitable power, to revolve rapidly, draws into the cavity the gas and
air, in proportions determined by the areas of the inlets, thoroughly-mixes them and
discharges the mixture through the orifices of the burner. As a compact
aud convenient means of driving the fan, a small electromotor is mounted in the
cavity, the armature being fixed on the axis of the fan. Also the inlet for gas into
the lamp is provided with a valve which usually closes the inlet, but this valve is
attached to the core of a solenoid having its coil connected to the circuit of the
motor, so that, when an electric current is supplied to cause rotation of the fan, the
solenoid core is at the same time attracted, opening the valve for admission of gas.
There may also be applied near the burner an electric lighter so arranged that
when the lamp is put in circuit a spark is produced which ignites. the issuing
combustible mixture.
Dated this 2nd day of March 1895
ABEL & IMRAY,
Agents for the Applicant.
Improvements in Incandescence Gas Lamps.
I, LOUIS DENAYROUZE, of 70 Boulevard Victor-Ilugo à Neuilly (Seine)
France, Engineer, 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 incandescence gas lamps and' has for its object, to effect
thorough'mixture of the gas and air which is to fornithe flame of the lamp, and to give
the mixture a suitable pressure, so as to obtain such heat of combustion as shall render
the mantle which is suspended over the flame brilliantly incandescent. For this
purpose, within a cavity of the lamp thero is mounted a fan which being caused by
any suitable power to revolve rapidly, draws into the cavity the gas and, air,
in proportions determined by the areas of the inlets, thoroughly mixes them and
discharges the mixture through the orifices of the burner. As a compact and
convenient means of driving the fan, a small electro motor is mounted in the cavity,
the armature being fixed on the axis of the fan. Also the inlet for gas into the
lamp is provided with a valve which usually closes the inlet, but this valve is

page_text: attached to the core of a solenoid having its coil connected to the circuit of the
motor so that, when an electric current is supplied to cause rotation of the fan, the
solenoid core is at the same time attracted, opening the valve for admission of gas.
There may also be applied near the burner an electric lighter so arranged that
when the lamp is put in circuit a spark is produced which ignites the issuing
combustible mixture.
Fig. 1 of the accompanying drawings is a front view and Fig. 2 is a vertical
section of lamp apparatus according to my invention.
Fig. 3 is a sectional plan immediately above the electric motor.
Fig. 4 is a section, Fig. 5 is a plan and Figa. 6 and 7 are sectional plans shewing
to an enlarged scale the gas and air passages.
The gas enters at the inlet A furnished with a valve B attached to the moveable
iron core C of a solenoid D. Above the core C is a fixed core E having a central
screw a which forms an adjustable stop for the core C when it rises to open the
valve B. The gas passes C which is of triangular form as shewn in Fig. 7, then
ascends 4 grooves in the sides of E as shewn in Fig. 6, and a passage c to
a chamber of which Fig. 5 is a plan. In a number of holes e formed in the
bottom of the chamber Fare fixed tubes f which pass up through somewhat
larger holes in the cover y so that around each tube there is an annular outlet h from
the chamber F to the chamber G containing the fan H, from which chamber two
passages K conduct the mixture of gas and air to the passage I terminating in a
wire gauze outlet Q under the incandescence mantle J.
The axis of the fan hias rounded ends entering holes in the ends of adjusting
screws mm which, when set, are secured by lock nuts o; in these screws нге
centre pins p having stems q surrounded by springs r, the axis of the fan being thus
provided with elastic and almost frictionless bearings, in which a little more
freedom is given by splitting at s the ends of the screw's m m'.
The electric motor comprises a permanent magnet L fixed on the fan chamber G
and having pole faces between which revolves the armature M which is fixed by
nuts t on the axis of the fan.
Two insulated brushes u¹ supply current to the commutator v.
On putting
the apparatus in circuit with a suitable source of electricity, the core C is attracted
upwards opening the valve B, and the fan is caused to revolve. The gas ascends
to the fan chamber by the annular passages drawing in air by the tubes f, and
thorough mixture being made by the fan, the mixed gas and air pass up to the
burner. Instead of ascending by the passages K, the mixed gas and air may pass
through a chamber X Fig. 9 to the burner. For kindling the burner a solenoid N,
shewn in section to an enlarged scale in Fig. 8, has a fixed core ( which attracts
a moveable core P carrying a small valve seating on a gas supply nozzle y.
When rises, it raises a stem a¹ having a rounded head 6 which pushes up in
opposition to a spring f' a small piston c working in a central bore of the piece e'.
A head of insulating material carries a small copper tube 4' having its top
platinised, on which rests a platinised button on the top of the stem of the
piston c. One end of the coil of N is connected to its metal body and conse-
quently to the piston c' on the side of which there is a friction spring . Tho
coil of N being connected to the one terminal of the source of electricity, and the
tube A¹ to the other terminal, on putting this apparatus in circuit, the valve is
raised, also the piston c', and the bead is suddenly separated from ¹ causing a
spark which inflames gas entering by y and passing up z d' and ' and thus causes
ignition of the gas and air of the main burner. One terminal of the battery S is
connected through a rheostat T to one end of the coil of D the other end of which
is connected to one of the brushes u u, the other brush is connected to one end
of the coil N, and, as described, to i, while ¹ is connected by return wire to the
battery through switch V.
For kindling, contact is first made by key U thus giving admission of gas at A
and starting the fan, whereupon contact at the switch V is momentarily made
shut effecting the kindling of the main flame.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. The intimate mixture of air and gas and its supply to the burner at no
sensible pressure, by means of a mixer in form of a fan.
2. The arrangement of air supply by tubes surrounded by annular passages
for gas.
3. For driving the fan the electric motor described.
4. The command of the gas supply to the lamp from a distance by means of an
electrically opened valve.
5. The command of the kindling of the lamp from a distance by means of an
electrically opened valve causing a lighting spark.
6. The general construction and arrangement of lamp herein described with
reference to the accompanying drawings.
Dated thie 31st day of Inly 1805
ABEL & IMRAY,
Agents for the Applicant.