Year: 1886

page_text: I ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in gas lamps and its object is to design a
regenerative gas lamp in which the atmospheric air supply is strongly heated, before
it reaches the gas flame. To this end the air enters first into a heating reservoir or
chamber through convenient openings arranged therein, from there it passes through
openings into a second reservoir or chamber, then through openings into another
reservoir or chamber and from thence it reaches the flame by passing through a
sieve.
The products of combustion and the heat will rise and pass round the air chambers
and through the annular space between the air chamber and the top gallery of the
lamp past the first air chamber into the chimney and out between the top of the
chimney and a deflector.
In this manner the air passing downwards through the chambers towards the cavity
of the flame is strongly heated as also is the illuminating gas passing through the tube
in the centre of the air chambers. The result is a great illuminating power and great
economy in the consumption of gas.
The purity of the flame is increased by a circular tube arranged underneath the jets
and provided with small openings at top and bottom. The bottom gallery is also
perforated. An opening in the bottom gallery serves to enable the gas to be lit and is
closed by a lug or otherwise.
A reflector dome shaped preferably can be arranged on the top of the chimney if
desired.

page_text: The globe rests on the bottom gallery held by a nut screwed onto the lower circular
tube and must be arranged so that it is easily removed and replaced for cleaning
purposes.
The burner consists of two parts screwed together and forming a reservoir perforated
laterally so that foreign matter brought in with the gas cannot obstruct the holes"
but simply remains at the bottom of the reservoir.
A screw spindle provided with a button at the bottom and passing through the
lower circular tube and screwed through the bottom of the gas burner reservoir serves
to open or close the opening through which the gas passes into the burner reservoir.
Dated this 29th day of June 1886.
W. P. THOMPSON & BOULT,
Agents.
COMPLETE SPECIFICATION.
Improvements in Gas Lamps.
A communication from ADOLPHE HANNIET, of Brussels, in the Kingdom of
Belgium.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
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 improvements in gas lamps and its object is to design a
regenerative gas-lamp in which the atmospheric air supply is strongly heated before it
reaches the gas flame. In the accompanying drawings:-Fig. 1 represents a sectional
elevation of a lamp constructed according to this invention.
Fig. 2 is a plan of air chamber.
Fig. 3 a sectional elevation thereof.
Fig. 4 sectional elevation in detail of burner.
Fig. 5 is detail in section of modified form of burner and Fig. 6 plan of air chamber
with curved conduits.
The burner of the lamp is composed of two parts indicated by the letters 00"; to
the part is screwed the supply pipe n and above the burner and around the supply
pipe are three air chambers c, b, a. The latter chamber has lateral openings d for the
inlet of air, these openings being protected from the action of currents by a shield j,
and also semicircular openings or concavities a" see plan fig. 2 formed around the

page_text: circumference and alternating with the openings d for the outlet of air as hereinafter
described.
To this end the air following the arrows 1 enters first into a heating reservoir or
chamber a through convenient openings d arranged therein, from there it passes
through openings m into a second reservoir or chamber 6 then through openings m
into another reservoir or chamber c and from thence it reaches the flame e by passing
through a sieve l.
The products of combustion and the heat following arrows 2 will rise and pass round
the air chambers and through the annular space between the second air chamber band
the top gallery of the lamp past the first air chamber a through the openings all into
the chimney hand out between the top of the chimney and a deflector .
In passing the chamber a the air is prevented from escaping laterally by means of
plates g and g the former of which forms part of the upper gallery and the latter
forms the bottom of the chimney i.
In this manner the air passing downwards through the chambers a b c towards the
cavity of the flame is strongly heated as also is the illuminating gas passing through
the tube n in the centre of the air chambers. The result is a great illuminating power
and great economy in the consumption of gas. The purity of the flame is increased
by a circular tube p arranged underneath the jets and provided with small openings
at top and bottonit and t". The bottom gallery is also provided with small
perforations u. An opening in the bottom gallery serves to enable the gas to be lit
and is closed by a plug or otherwise.
A reflector, dome shaped preferably, can be arranged on the top of the chimney if
desired.
The globe rests on the bottom gallery, held by a nuts screwed onto the lower
circular tube p and must be arranged so that it is easily removed and replaced for
cleaning purposes.
The burner consists of two parts o and o" screwed together and forming a chamber z
and provided with lateral perforations yll so that any foreign matter brought in with
the gas cannot obstruct the holes y but simply remains at the bottom of the
chamber z.
A screw spindle v provided with a button at the bottom and passing through the
lower circular tube and screwed through the bottom of the gas burner chamber serves
to open or close the opening y through which the gas passes into the burner
chamber.
The burner may also be constructed as represented in section in figure 5, i.e. the
gas passing between two circular plates instead of through small perforations which
are easily obstructed.
In this figure 5, A, B are the two burner plates, C the nut supporting the lower
plate B, D the tube on which the lower plate B slides, E the plug for closing the
tube D, F screws which hold B and C together, G interior of the tube D, H annular
groove in B for the screws F, I the interior of E where the foreign matter
accumulates.
The circular plates A B may be either fixed or adjustable and may be of any suitable
material. The flame may be situated either on the outside or the inside of the burner,
and it may be either horizontal, vertical or oblique according to the construction of
the burner, but the horizontal burner with adjustable plates is preferably used.
From the drawings it will be easily understood that by screwing or unscrewing the
nut the lower plate B of the burner is either moved towards or from the upper
plate A thus increasing or diminishing or entirely closing the annular opening y
between the plates A B of the burner through which the gas passes, and regulating
the size of the flame and consumption of gas.
The airchamber through which the air passes to the burner may also be provided
with curved conduits as represented in figure 6 to prevent the air from rushing too
direct to the flame, and thus to prevent the formation of smoke.
The globe may be replaced by a half sphere, shade or reflector if desired, fixed to
the lamp by two bayonet joints, so as to be easily removed.

page_text: Having now particularly described and ascertained the nature of the said invention,
as communicated to me by my foreign correspondent, and in what manner the same
is to be performed, I declare that what I claim is :-
1. In a gas-lamp the three superposed air chambers such as a b c through which the
air successively passes before reaching the burner, substantially as and for the purpose
specified.
2. In a gas-lamp the construction of the outlet for the products of combustion,
surrounding the above named three air chambers for the purpose of heating the air
passing through the latter substantially as specified.
3. In a gas-lamp the construction of the burner such as represented in figure 4 of
the accompanying drawings with a chamber such as z for the purpose of intercepting
and retaining foreign matter introduced with the gas, substantially as specified.
4. In a gas-lamp the method of fixing the globe so that it can be inserted and
removed without disturbing the button vll at the bottom of the burner spindle,
substantially as specified.
5. In a gas-lamp the construction of the burner such as represented in figure 5 of
the accompanying drawings for the purpose of obtaining an unbroken circular flame,
substantially as specified.
6. In a gas-lamp the construction of the burner such as represented in figure 5 of the
accompanying drawings for the purpose of increasing or diminishing the consumption
of gas by varying the capacity of the annular opening of the burner, substantially as
specified.
7. In a gas-lamp an air chamber provided with curved tubes, substantially as and
for the purpose specified and represented in figure 6 of the accompanying drawings.
8. The complete gas-lamp substantially as described and represented in the
accompanying drawings.
Dated this 20th day of Mauch 1007