Year: 1887

page_text: Date of Application, 8th Dec., 1887
Complete Specification Left, 18th July, 1888
Complete Specification Accepted, 24th Aug., 1888
A communication from GEORGE LEBRUN and PAULIN FOUGERON, junior, of 11, rue
Taitbout, Paris, in the Republic of France, Manufacturers.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex, M.I.M.E.
do hereby declare the nature of this invention to be as follows:-
For some time inventors have endeavored to design a gas lamp which gives a good
light and at the same time economizes the gas. Many such have been constructed and
with pretty good results but have not found general favor with the public because
of their ungainly appearance and especially their high price. Besides, these apparatus
have the serious disadvantage that they only light the space beneath the horizontal
plane of their flame, and cannot be adapted to existing gas fittings.
The object of the present invention is to avoid these disadvantages and the apparatus
which will be hereafter described presents the appearance of a glass or crystal globe
surmounted by a metal crown either plain or ornamented into which is fitted a metal
or glass chimney to carry off the products of combustion.
This peculiar construction with the horizontal flame burning in the centre of the
globe permits of the higher parts of the room in which it is placed, also being lighted
and this is an advantage which none of the apparatus in use up to the present time
possesses.
For warehouses and other places where it is desirable to throw the light down or
onto a certain part of the premises the globe is preferably replaced by a glass cup and
the lamp provided with a suitable reflector.
These lamps may be fixed to any existing gas fittings and burn equally well in the
open air.
The air necessary for the combustion of the gas may be introduced into the globe
through openings formed in the crown surmounting the globe and connected with a
central vertical tube by horizontal tubes; the central tube being provided at the bottom
with a perforated plate situated directly over the horizontal flame. The products of
combustion are carried off by a suitable chimney surmounted preferably by a
deflector.

page_text: If it is desired to introduce the air necessary for the combustion from below the
flame, the globe carrying bracket is perforated and the air passes through a glass tube
into an upper chamber whence it descends to the flame through the perforated bottom
of the said chamber. The products of combustion are carried off in the same manner
as described above.
The burner of the lamp terminates in an elongated point or pin which fits into a
recess formed in the centre of the perforated plate through which the air passes to the
flame. By this arrangement the flame will always be exactly in the centre of the
apparatus and concentric with the said perforated plate. This arrangement also partly
supports the upper parts of the apparatus and will prevent them from falling in case
the globe should break.
The centering pin may also be fixed to the centre of the perforated plate and
projecting downwards and fitting into a recess formed in the top of the burner; or the
burner may be screwed onto the bottom of the central tube and supported by the globe
carrying bracket by means of a cone and socket or equivalent.
In case the air is introduced through the globe carrying bracket the centering may
be done by fitting an annular shoulder formed in the central tube of the upper air
chamber into a corresponding recess formed in the metal part of the burner.
The burner proper consists of a ring of steatite or other suitable refractory
material conveniently fitted onto the gas tube the uppermost part of which forms the
centering pin.
In case the air is introduced through the globe carrying bracket the gas may be
supplied by a central tube from which branch off three or more transverse tubes which
supply an annular metal chamber provided with the circular steatite burner.
The tube carrying the burner is screwed into the globe carrying bracket so that the
height of the centering point may be adjusted to the height of the globe. For the
lighting of the lamp the globe carrying bracket is formed with an opening which is
closed either by a slide or by a hinged trap falling by its own weight.
In case dry or wet regulators are necessary to regulate the supply of gas the heat
produced by the above described apparatus may y conductivity interfere with or
prevent the proper working of the regulators. To avoid this a suitable insulator is
preferably introduced between the lamp and the regulator. This insulator consists
of a wide wooden washer introduced between two parts of the pipe amianth or
equivalent being placed between the metal and the wood to prevent carbonization of
the latter.
Dated this 8th day of December 1887.

page_text: A communication from GEORGE LEBRUN and PAULIN FOUGERON, junior, of 11, rue
Taitbout, Paris, in the Republic of France, Manufacturers.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex, M.I.M.E.
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:-
For some time inventors have endeavored to design a gas lamp which gives a
good light and at the same time economises the gas. Many such have been
constructed and with pretty good results but have not found general favor with the
public because of their ungainly appearance and especially their high price. Beside,
these apparatus have the serious disadvantage that they only light the space
beneath the horizontal plane of their flame and cannot be adapted to existing gas
fittings.
The object of the present invention is to avoid these disadvantages and the apparatus
which will be hereafter described presents the appearance of a glass or crystal globe
surmounted by a metal crown either plain or ornamented into which is fitted a metal
or glass chimney to carry off the products of combustion.
This peculiar construction with the horizontal flame burning in the centre of the
globe permits of the higher parts of the room in which it is placed also being lighted
and this is an advantage which none of the apparatus in use up to the present time,
possesses.
For warehouses and other places where it is desirable to throw the light down or
onto a certain part of the premises the globe is preferably replaced by a glass cup and
the lamp provided with a suitable reflector.
These lamps may be fixed to any existing gas fittings and burn equally well in the
open air.
In the accompanying drawings:
Figs. 1 and 2 are vertical sections of two different forms of lamp constructed
according to the present invention.
Fig. 3 represents in elevation the lamp shown in figure 1 as fitted with a reflector
which together with the crown is represented in section.
Figs. 4, 5, 6 and 7 are view of details all hereinafter more particularly referred to..
The air necessary for the combustion of the gas in the lamp represented in Fig. 1
is introduced into the globe through openings A¹ formed in the crown A surmounting.
the globe B and connected with a central vertical tube A2 by horizontal tubes A³ A³;"
the central tube being provided at the bottom with a perforated plate A* situated
directly over the horizontal flame. The products of combustion are carried off by a
suitable chimney C surmounted preferably by a deflector.
The burner Ď of the lamp as shown in enlarged detached sectional view at figure 4.

page_text: terminates in an elongated point or pin D¹ which as shown at figure 1 fits into a
recess A formed in the centre of the perforated plate A' through which the air passes
to the flame. The burner proper consists of a ring of steatite or equivalent material
and is secured on the tube D2 between the fixed shoulder L and screwed nut L or in
any other suitable manner. By the before mentioned arrangement the flame will
always be exactly in the centre of the apparatus and concentric with the perforated
plate A. This arrangement also partly supports the upper parts of the apparatus
and will prevent them from falling in case the globe should break.
The centreing pin D¹ may however be fixed to the centre of the perforated plate A¹
and projecting downwards fit into a recess formed in the top of the burner or as shown
at figure 5 the tube D2 above the burner D may be screwed into the bottom of the
central tube A2 and may be supported by the globe carrying bracket by means of a
cone E and socket E or equivalent device.
In the lower part of figure 1, F is the plate on which rests the globe B and into
this plate is screwed the tube D2 carrying the burner D so that the height of the
point D' of this tube can be adjusted for the purpose of fitting the upper part of the
lamp hermetically onto the globe at the part marked Z. The nut D³ serves to hold
the tube D2 in position after it has been adjusted.
The plate F is formed with two openings one in the centre being screw threaded for
the reception of the tube D2 and the other one F is provided for the purpose of
lighting the lamp, this latter opening being, when the lamp is burning, closed by a
movable plate G formed with a similar opening and held in position by the sleeve G',
G2 is a small projection or handle for enabling the plate G to be moved for the purpose
of covering or uncovering the opening F".
If it is desired to introduce. the air necessary for the combustion of the gas from
below the flame as represented in figure 2 the globe carrying bracket F is perforated
as indicated at F2 and the air passes through the said perforations and through a glass
tube H into an upper chamber I whence it descends to the flame through the per-
forated bottom A of the said chamber.
The products of combustion are carried off in the same manner as before described,
and the gas may if desired be supplied to the burner through a central tube from
which branch off three or more transverse tubes which supply an annular metal
chamber provided with the circular steatite burner.
The tube D2 carrying the burner D as shown at figure 2 is screwed into the globe
carrying bracket F so that the necessary adjustment is provided to suit the slightly
varying heights of different globes.
For the lighting of the lamp the globe carrying bracket F is formed with an
opening which is closed either by a slide as represented at figure 1 or by a hinged
trap or door J falling by its own weight as represented in enlarged plan view at
figure 6. The centreing of the parts of the lamp shown at figure 2 may be done
by fitting the central tube K of the upper air chamber I into a corresponding
recess formed in the metal part L of the burner.
The lamp shown at figure 3 is of construction similar to figure 1 but the glass cup
shown is substituted for the globe represented at figure 1. The reflector M is
secured to the crown A in any convenient manner.
The burner tube may be composed of two parts as represented in figure 5. The
lower part is constructed the same as in figures 1, 2 & 3 and screwed into the.
plate and held in position at the desired height by the nut D³; the upper part
as herein before described resting at one end on a cone E formed on the lower part
and at the other end it is screwed into the upper part of the lamp.
In case dry or wet regulators are necessary to regulate the supply of gas the heat
produced by the above described apparatus may, by conductivity, interfere with or
prevent the proper working of the regulators. To avoid this a suitable insulator is
preferably introduced between the lamp and the regulator. This insulator as shown
in section at figure 7 consists of a wide wooden washer N introduced between two
parts O and P of the pipe, amianth or equivalent shown at being placed between
the metal parts O and P and the wood N to prevent carbonisation of the latter.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me by my
foreign correspondent, I declare that what I claim is :-
1. The gas lamps with horizontal flame substantially as and for the purpose described
and represented in the accompanying drawings.
2. In gas lamps with horizontal flame the mechanism for opening and closing the
globe carrying bracket for the purpose of lighting substantially as described and
represented in the accompanying drawings.
3. In gas lamps with horizontal flame the burner carrying tube such as D2 screw
threaded at its lower end and provided with a nut such as D³ for the purpose of
adjusting the upper part of the lamp to the height of the globe such as B substantially
as described and represented in the accompanying drawings.
4. The insulator of non-conducting material substantially as and for the purpose
specified and represented in figure 7 of the accompanying drawings.
Dated this 18th day
1000.
W. P. THOMPSON & BOULT,
Agents.
W. P. THOMPSON & BOULT,
Agents.