Improvements in Incandescent Lamps for the Combustion of Petroleum.
Year: 1896

page_text: Date of Application, 25th Aug., 1896
Complete Specification Left, 25th May, 1897-Accepted, 10th July, 1897
PROVISIONAL SPECIFICATION.
Improvements in Incandescent Lamps for the Combustion of
Petroleum.
I, WILLIAM CLARK of the Firm of A. M. & Wm. Clark of 53 Chancery Lane in
the County of Middlesex, Fellow of the Chartered Institute of Patent Agents; do
hereby declare the nature of this Invention (a communication to me by Albert
Meyenberg (Manufacturer) Max Wendorf (Mechanical Instrument Maker) and
Siegmund Henlein (Merchant), all of 61, Langenstrasse, Frankfort-on-the-Main,
in the Empire of Germany;) to be as follows:-
This Invention relates to improvements in the lamp for which application for
Letters Patent was made on the 12th day of December 1895 No. 23,863.
The present Invention comprises improvements in the general arrangement of
the parts constituting the lamp as well as improvements in the burner, the cock
or tap, and the compressed air apparatus.
The Invention will be described with reference to the accompanying drawings
wherein Figure 1 is a longitudinal section through the new lamp, Figures 2 and 3
sections through the tap, on a greatly enlarged scale, Figure 4 a face view of the
scale attached to the tap, Figure 5 a section through the base of the lamp.
A is the petroleum reservoir which is filled through the opening L. B is the
benzoline vessel filled with cotton wool which is charged through the opening F
and the tube f. C is the base of the lamp containing the air pumping bulb II'.
The latter is adapted to be compressed by means of the lever I which is pivoted
at d and is operated by means of the handle D. A spring draws the lever
upward. As the ball H expands it draws in air through the flexible pipe ¹ and
the opening and when compressed the air that has been drawn in is forced out
through the flexible pipe into the pipe b'. On the lever D is mounted a rubber
disc d which closes the opening h³ when the lever is in its highest position. The
ball H is also provided with the usual inflow and delivery valves (not shown).
The compressed air passes through the pipe b into the hollow rubber ball H
which is arranged in the upper part C of the base of the lamp. When this ball
which serves as an elastic air reservoir is filled it presses against one arm of a
lever E which engages by means of a pawl in the teeth d' of the lever D and serves
to prevent further movement of the latter. From the upper end of the pipe b
there extends a branch pipe 9 which terminates at the bottom of the benzoline
vessel. The vapour issuing from the said vessel passes through tho pipe a¹ to the
cock M. A second branch pipe 63 extends upwards from the top of the pipe b and
opens within the upper part of a hollow dome or pillar b on the reservoir A at a
height sufficient to prevent the entry of petroleum when the lamp is held in an
inclined position.
The petroleum acted on by the compressed air is forced through the cylinder
(which is filled with cotton wool or the like for filtering purposes and which is
closed at the top by means of a screw-cap ) to the cock M which is formed with
the two passages m³ m³ for the petroleum and benzoline vapours respectivoly,
and these passages being so arranged that at the instant the benzoline pipe mi

page_text: is closed, or just before, the petroleum pipe m is opened so that the petroleum
vapour will become ignited by the benzoline flame.
In order to allow of adjusting the supply of petroleum to the flame very
accurately there is provided laterally of the passage m a small groove m
(Figure 3) which allows petroleum to flow through before the full bore of the
passagem is opened to the pipe m. The horizontal portion of the passage m
is made wide as indicated for the purpose of preventing it from becoming choked.
It is an exceedingly difficult matter to make a petroleum cock oil-tight. In
the present arrangement complete tightness against leakage is offected by making
the cock plug M and the cock casing M of conical form at their larger end so as
to produce a groove of triangular form in cross section into which there is forced
by means of a close-ended screw-nut or union M or other device a correspondingly
shaped ring M an intermediate leather jointing washer M having been first placed
between the two. The benzoline pipe m opens into an annular passage Y T
having openings from which benzoline vapour mingled with air issues and
burns at the top whilst more air can be taken up by the gas from the interior.
The petroleum pipe m opens out at a little distance above the bottom of the
vapourizer R from the upper end of which the petroleum vapour escapes through
a pipe p which discharges at p in an upward direction within the burner tube P.
The effect of this arrangement is that the petroleum vapour draws in air through
the lateral apertures y of the lower part of the burner tube P and mingles with
said air, the cap Q which closes the lower end of the tube P serving to catch any
petroleum that may happen to drip down. The burner top is carried by the
burner tube P mounted on the dome G which is in turn supported by the
pillars G².
For the purpose of adjusting the cock M correctly its spindle is provided in
front with a knob or disc N upon which a scale is marked. An index or pointer N
projects through a slot in this plate and serves to indicate whether the cock is
closed, the benzoline passage open, and the petroleum passage is completely open
or is adjusted to give the proper size of flame.
Dated this 25th day of August 1896.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.
COMPLETE SPECIFICATION.
Improvements in Incandescent Lamps for the Combustion of
Petroleum.
I, WILLIAM CLARK of the Firm of A. M. & Wm. Clark of 53 Chancery Lane in
the County of Middlesex, Fellow of the Chartered Institute of Patent Agents; do
hereby declare the nature of this Invention (a communication to me by Albert
Meyenberg (Manufacturer) Max Wendorf (Mechanical Instrument Maker) and
Siegmund Henlein (Merchant), all of 61, Lungeustrasse, Frankfort-on-the-Main,
in the Empire of Germany;) 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 the lamp forming the subject of
former Letters l'atent dated the 12th day of December 1895 No. 233,803.
The present Invention comprises improvements in the general arrangement of
the parts constituting the lamp as well as improvements in the burner, the
benzoline and petroleum cock, and the compressed air apparatus.
The Invention will be described with reference to the drawings accompanying

page_text: the Provisional Specification wherein Figure 1 is a longitudinal section through
the new lamp, Figures 2 and 3 sections through the tap on a greatly enlarged
scale, Figure 4 a face view of the scale attached to the tap, Figure 5
through the base of the lamp.
section
A is the petroleum reservoir which is filled through the opening L. B is the
benzoline vessel filled with cotton wool which is charged through the opening F
and the tube f. Ct is the base of the lamp containing the air pumping bulb H.
The latter is adapted to be compressed by means of the lever I which is pivoted
at d and is operated by means of the handle D'. A spring draws the lever
upward. As the ball H expands it draws in air through the flexible pipe h¹ and
the opening and when compressed the air that has been drawn in is forced out
through the flexible pipe h into the pipe b. On the lever D is mounted a rubber
disc d which closes the opening 3 when the lever is in its highest position. The
ball H is also provided with the usual inflow and delivery valves (not shown).
The compressed air passes through the pipe & into the hollow rubber ball H
which, is arranged in the upper part C of the base of the lamp. When this ball,
which serves as an elastic air reservoir, is filled it presses against 'one arm of a
lever E which engages by means of a pawl in the teeth d' of the lever D and serves
to prevent further movement of the latter. From the upper end of the pipe b
there extends a branch pipe 6 which terminates at the bottom of the benzoline
vessel. The vapour issuing from the said vessel passes through the pipe al to the
cock M. A second branch, pipe & extends upwards from the top of the pipe band
opens within the upper part of a hollow dome or pillar on the resorvoir A at a
height sufficient to prevent the entry of petroleum when the lamp is held in an
inclined position.
The petroleum acted on by the compressed air is forced through the cylinder a
(which is filled with cotton wool or the like for filtering purposes and which is
closed at the top by means of a screw-cap ') to the cock M which is formed with
the two passages m³ m³ for the petroleum and benzoline vapours respectively,
and these passages being so arranged that at the instant the benzoline pipe mis
closed, or just before, the petroleum pipe m is opened so that the petroleum
vapour will become ignited by the benzoline flame.
In order to allow of adjusting the supply of petroleum to the flame very
accurately there is provided laterally of the passage m a small groove m
(Figure 3), which allows petroleum to flow through before the full bore of the
passage m is opened to the pipe m. The horizontal portion of the passage m' is
inade wide as indicated for the purpose of preventing it from becoming choked.
It is an exceedingly difficult matter to make a petroleum cock oil-tight. In
the present arrangement complete tightness against leakage is effected by making
the cock plug M and the cock casing M of oppositely conical form at their larger
end so as to produce a groove of V form in cross section into which there is forced
by means of a screw-cap or union M3 or other device a presser ring M also of V
section, an intermediate leather jointing washer M' having been first placed between
the two. The benzoline pipe m opens into an annular passage T having openings
from which benzoline vapour mingled with air issues and burns at the top whilst
more air can be taken up by the gas from the interior. The petroleum pipe m
opens out at a little distance above the bottom of the vapourizer R from the upper
end of which the petroleum vapour escapes through pipe which discharges
at 7 in an upward direction within the burner tube P. The effect of this arrange -
ment is that the petroleum vapour draws in air through the lateral apertures 9 of
the lower part of the burner tube l' and mingles with said air, the cap Q which
closes the lower end of the tube P serving to catch any petroleum that may happen
to drip down. The burner top P' is carried by the burner tube mounted on the
dome G' which is in turn supported by the pillars G³.
Tor the purpose of adjusting the cock al correctly its spindle is provided in
front with a knob or disc N upon which a scale is marked. An index or pointer N¹

page_text: projects through a slot in this plate and serves to indicate whether the cock is
closed, the benzoline passage open, and the petroleum passage is completely open or
1s adjusted to give the proper size of flame.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The general arrangement and construction of the improved lamp substantially
as herein described and illustrated in the drawings.
2. In the herein described lamp the combination, with the expansible air
reservoir bulb contained in the upper part of the lamp base, of an air pumping
bulb contained in the lower part of the base and connected with the reservoir
bulb as described, means of operating the air pumping bulb and means of arresting
the operation of the air pumping bulb by the expansion of the air reservoir
substantially as specified.
3. In the herein described lamp the benzoline and petroleum reservoirs arranged
as described and provided with separate conduits for air and benzoline vapours and
the air space of the latter being in communication with the former by means
substantiany such as described.
4. The special construction of the cock controlling the benzoline vapour and the
petroleum, whereby to make it petroleum-tight substantially as specified.
5. In the herein described lamp the employment of a rubber ball as an elastic
air reservoir for the purpose specified.
6. In the herein described lamp the construction of the burner with an annular
passage and orifices for the benzoline vapour as described.
Dated this 25th day of May 1897
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.