Improvements in Blow Pipe Lamps for the Use of Plumbers and for Heating Purposes generally.
Year: 1896

page_text: Date of Application, 19th Aug., 1896
Complete Specification Left, 12th May, 1897-Accepted, 1 th June 1897
PROVISIONAL SPECIFICATION.
Improvements in Blow Pipe Lamps for the Use of Plumbers and for
Heating Purposes generally.
I WILLIAM PULLEN of No. 42 Lee Crescent, Edgbaston, Birmingham in the
County of Warwick Electrical Engineer do hereby declare the nature of this
invention to be as follows:-
The object of my invention is principally to dispense with the air pumps or
blowers ordinarily employed in blow pipe lamps for forcing by pressure of air the
petroleum or other volatile liquid hydro-carbon from the reservoirs or containers to
vapourizers of the lamps; and my said invention consists in constructing and
arranging for that purpose the parts of the said blow pipe lamps as hereinafter
described.
the
I will describe my invention in connection with a blow pipe lamp for use by
plumbers.
The cylindrical reservoir containing the petroleum or other like volatile liquid.
hydro-carbon is filled preferably by an opening at bottom fitted with a closing
screw plug, the said reservoir being provided with a handle for holding the lamp
when in use. The top of the cylindrical reservoir is cupped for the purpose herein-
after described and at the middle of the said top is a short pipe or wick holder
which supports a globular or cylindrical vapouriser closed at top by a screw plug.
In the vapouriser is a horizontal pipe or passage through which the flame is
prejected a cross vertical bar in the said horizontal pipe dividing or spreading the
said flame. The petroleum or other volatile liquid hydro-carbon is fed from the
reservoir to the vapouriser by an asbestos wick, the said wick rising through
the axial wick tube described, and filling the space between the passage in the
vapouriser and the sides of the vapouriser. At the handle side of the lamp and in
line with the axis of the tubular passage in the vapouriser, is a nozzle or burner
and passing from the said burner to the top of the vapouriser is a pipe by which
the vapour produced in the vapouriser is conducted to the burner or nozzle. At
the back of the burner or nozzle is a screw valve by which the passage of the
vapour from the vapouriser to the burner is controlled and cut off.
In using my improved blow pipe lamp, say for burning off paint. a small
quantity of petroleum is poured into the cupped top of the reservoir and ignited for
the purpose of starting the lamp. The vapouriser is heated and the petroleum,
raised by the capillary action of the asbestos wick into the said vapouriser is
thereby vapourized and when the vapour has attained the desired pressure, the
screw valve of the burner is opened and the vapour under pressure escapes at the
nozzle or burner and is ignited, and a blow pipe flame produced the said flame
passing through and projecting from the tubular passage in the vapouriser. By
the heat of the blow pipe flame in the tubular passage of the vapouriser, the
heating of the vapouriser and the production of vapour under pressure is continued
after the exhaustion of the petroleum by which the starting of the flame was
produced. In this way, the automatic feeding of the nozzle or burner with the
vapourised oil under pressure is continued so long as the nozzle or burner valve is
opeu aud the supply of petroleum maintained to the vapouriser.
Besides burning off paint the lamp described may be used for heating plumbers'
lead vote. soldering irons and the like.

page_text: In order to determine a greater or less admixture of air with the vapour and
thereby to determine the production of a non-luminous or luminous flame, I place
a tubular cover on the nozzle; the said cover having a series of openings which
may be more or less closed and the supply of air regulated at the will of the user
of the lamp.
Instead of using a single axial wick tube a double wick tube, one on each side of
the vapourizer may be employed; and for laboratory or other heating purposes, a
vertical instead of a horizontal flame may be used; or a sprealer may be arranged
at the top of the vapouriser for producing two or more vertical and horizontal
flames or jets.
My improved blow pipe lamps are applicable for heating purposes generally, the
details of their construction heing modified to suit the particular use to which they
are to be applied.
Dated this Nineteenth day of Aurust 1808
W. T. WHITEMAN,
Agent for the Applicant.
Improvements in Blow Pipe Lamps for the Use of Plumbers and for
Heating Purposes generally.
I, WILLIAM PULLEN, of No. 42 Lee Crescent, Edgbaston, Birmingham, i the
County of Warwick, Electrical Engineer, do hereby declare the nature of my
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
The object of my invention is, principally, to dispense with the air pumps or
blowers ordinarily employed in blow pipe lamps for forcing by pressure of air the
petroleum or other volatile liquid hydro-carbon from the reservoirs or containers to
the vapourizers of the lamps; and my said invention consists in ovnstructing and
arranging for that purpose the parts of the said blow pipe lamps as herein after
described.
I will describe my invention in connection with a blow pipe lamp for use by
plumbers and painters.
The cylindrical reservoir containing the petroleum or other like volatile liquid
hydrocarbon is filled preferably by an opening at top fitted with a closing screw
plug the said reservoir being provided with a handle for holding the lamp when in
use. The top of the cylindrical reservoir is cupped for the purpose hereinafter
described and at the middle of the said top is a short pipe or wick holder which
supports a globular or cylindrical vapouriser closed at top by a screw plug. In
the vapouriser is a horizontal pipe or passage through which the flame is projected,
a cross vertical bar or bars in the said horizontal pipe dividing or spreading the said
flame. The petroleum or other volatile liquid hydro-carbou is fed from the
reservoir to the vapouriser by an asbestos wick, the said wick rising through the
azial wick tube described, and filling the space between the passage in
the vapouriser and the sides of the vapouriser. At the handle side of the latap
and in line with the axis of the tubular passage in the vapouriser, is a nozzle or
burner and passing from the said burner to the top of the vapouriser is a pipe by
which the vapour produced in the vapouriser is conducted to the burner or nozzle.
At the back of the burner or nozzle is a screw valve by which the passage of the
vapour from the vapouriser to the burner is controlled and cut off.
In order to determine a greater or less admixture of air with the vapour and
thereby to determine the production of a non-luminous or luminous flame, I place

page_text: a tubular cover on the nozzle, the said cover having a series of openings which may
be inore or less closed and the supply of air regulated at the will of the user of
the lamp.
For laboratory or other heating purposes a vertical instead of a horizontal flame
may be used; or a spreader may be arranged at the top of the vapouriser for
producing two or more vertical and horizontal flames or jets.
My improved blow pipe lamps are applicable for heating purposes generally, the
details of their construction being modified to suit the particular uso to which they
are to be applied.
Figure 1 of the accompanying drawing represents in side elevation; Figure 2
in longitudinal section and Figure 3 in cross section a plumber's blow pipe lamp
constructed according to my invention;
Figure 4 represents a section of the valve in its open position aud
Figure 5 represents a modified blow pipe lamp constructed according to my
invention as hereinafter described.
The same letters of reference indicate the same parts in the several figures of.
the drawing.
I will first describe the principal arrangement of my invention represented in
Figures 1, 2, 3 and 4.
a is the reservoir of the lamp containing the petroleum or other like volatile..
liquid hydro-carbon. The said reservoir is filled by an opening at top closed by
the screw plug b (see Figure 3); a is the handle by which the lamp is held when
in use; d is the cupped top of the reservoir constituting a shallow vessel for
holding a small quantity of petroleum or methylated spirit by which the vapouriser
is first heated for starting the lamp. The valve by which the passage of vapour of
oil from the vapourizer to the burner is controlled may also be heated on starting
the lamp by petroleum or methylated spirit poured into the small cup a' and
ignited. Screwed into the middle of the reservoir a and projecting therefrom is a
short pipe or wick holder e supporting the globular (or cylindrical) vapouriser f
having in its axis a horizontal tube or passage g.
In the middle of the pipe or
passage y of the vapouriser is a cross pipe or bar h (or pipes or bars) for sprea ling
or dividing the flame passing through the said pipe or passage; i is the asbestos
wick by which the petroleum in the reservoir a is fell by capillary attraction to the
vapouriser. It will be seen that the asbestos wick i rises from the reservoir
through the axial wick tube e and fills the space between the sides of the globular
vapouriser fand the pipe or passage y as represented in the cross section Figure 3.
The lifting of the asbestos wick i from the reservoir a into the vapourisor f may
be assisted by menus of a wire passed through the opening in the top of the
vapouriser to draw up the wick, the said opening being closed by the screw
plug k; is the burner at the handle end of the lamp the said burner being in
communication by means of the exit passage m and pipe n with the top of the
vapouriser flu line with the axis of the tubular passage g in the vapouriser and
at the back of the burner, is a screw valve p by which the passage of the vapour
of oil from the vapouriser to the burner is controlled and cut off. In Figure 2.
the screw valve p is represented in its closed position, the passage of the vapour
from the vapouriser to the burner being cut off and in Figure 4 the valve is repre-
'sented open and the vapour permitted to pass from the vapouriser through the
pipe n and exit passage in to the burner 1.
The nozzle or delivery end of the tubular passage y through which the flame
passes is provided with a perforated pipe g for admitting air to the flame.
The space between the burner and the vapouriser may be covered wholly or
mainly by a tubular cover or shield (not shown in the drawing) for protecting the
flame. This cover or shield may also be used or the production of a non-
luminous or luminous flame as before described.
In using my improved blow pipe lamp, sny, for burning off paint, a small
quantity of petroleum or methylated spirit is poured into the cupped top or
shallow vessel d of the reservoir a and into the small cup a' and the said petroleum

page_text: iguited for the purpose of starting the lamp. The vapouriser f is heated and the
petroleum, raised by the capillary action of the asbestos wick i into the said
vapouriser, is thereby vapourised and when the vapour has attained the desired
pressure, the screw valve p of the burner is opened and the vapour under pressure
escapes at the nozzle or burner and is ignited, and a blow pipe flame produced,
the said flame passing through and projecting from the nozzle of the tubular
passage g in the vapouriser. By the heat of the blow pipe flame in the tubular
passage 9 of tho vapouriser, the heating of the vapouriser and the production of
vapour under pressure is continued after the exhaustion of the petroleum or
methylated spirit in the vessel d by which the starting of the flame was produced.
In this way, the automatic feeding of the nozzle or burner with the vapour of oil
under pressure is continued so long as the nozzle or burner valve p is open and the
supply of petroleum to the vapouriser maintained.
Figure 5 represents in elevation a blow pipe lamp for laboratory and other like
work constructed according to my invention the said lamp having a vertical flanio
and being also provided with a spreader for producing two or more vertical and
horizontal flames or jets. In this modified lamp the tubular passage through the
vapouriser is vertical, the said vapouriser being supported by the side pipe f
through which the asbestos wick from the reservoir a is drawn into the said
vapouriser by means of a wire passed through the side opening at in the said
vapouriser.
burner / the
The vapour is conducted by the pipe n from the vapouriser to the
said vapour being regulated and cut off by the screw valve p as described with
respect to the lamp Figures 1, 2 and 3.
When the vertical flame issuing from the projecting top of the passage g in the
vapouriser is required to be spread, a spreader markeds may be fitted upon the
projecting top of the passage g as represented in the drawing. By the use of this
spreader a series of horizontal flanies or jets and one or more vertical jets are
produced. Although I have found wicks of asbestos to answer well yet wicks of
other non-combustible fibrous material such as slag wool may be used in lamps
constructed according to my invention.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I declare that I claim as my
invention of "Improvements in blow pipe lamps for the use of plumbers and for
heating purposes generally'
The combination with the reservoir of the lamp of a vapouriser in communica-
tion with the burner of the lamp, the said vapouriser having a pipe or passage in
line with the burner through which pipe or passage the blow pipe flame of the
lamp is forced for the purpose of heating the said vapouriser and producing
vapour of oil under pressure, the petroleum or other like volatile liquid hydro-
carbon being conducted from the reservoir to the vapouriser by an asbestos or
non-combustible wick, the petroleum in the vapouriser being first vapourised and
supplied under pressure for starting the lamp by the buruing of a small quantity
of petroleum or methylated spirit poured in the cupped top of the reservoir and
the automatic feeding of the vapour of oil under pressure being continued by the
heat of the blow pipe flame passing through the tubular passage in the said
vapouriser, the several parts being constructed, arranged and operating substan-
tially as herein before described and illustrated in the accompanying drawing.
Dated th : 1
10027
WILLIAM PULLEN.