Year: 1898

page_text: I, JOHN SCHUMACHER, of 46, Van Buren Street, Chicago, State of Illinois, United
States of America, Manufacturer, do hereby declare the nature of this invention to be
as follows:
The present invention has for its object, first, to so shape the mass of carbide of
calcium as to ensure a substantially uniform generation of gas therefrom; second, to
improve the construction of the lamp wherein the gas is burned, and third, to provide
These several objects of
improved means for holding the lamp in position for use.
invention are accomplished by the novel features hereinafter described and illustrated
in the accompanying drawings.
Fig. I is a view in side elevation of a lamp embodying the invention, the globe
being shown in vertical section. Fig. II is a plan view of the bracket whereby the
lamp will be held in position for use. Fig. III is a view in central vertical section
through the lamp. Fig. IV is an enlarged detail view showing the manner of holding
the burner-tip in place.
The globe A of the lamp may be of any usual or suitable construction, being
preferably detachably connected to the lamp-body B. In the drawings the globe A is
shown as formed with an annular flange a at its base, this flange having inwardly
extending off-sets a¹ adapted to enter corresponding angular grooves b that are formed
in the top annular flange 6 of the lamp-body B. The off-set a¹ and the angular
grooves b form bayonet joints whereby the globe and the body of the lamp are securely
yet detachably connected together. Beneath the body B of the lamp is mounted a
generating chamber C, preferably of cylindrical shape, the upper end of the chamber C
being formed with exterior screw-threads adapted to engage with a corresponding
interiorly threaded flange b that depends from the base of the lamp-body B and is
rigidly connected therewith. Between the lainp-body B and the generating chamber C
is the gas-entry chamber D into which the gas from the generating chamber C will
pass before its delivery to the burner.
The body of the chamber D is formed from sheet-metal, the bottom of the chamber
being perforated to receive a plug E rigidly fixed thereto, from which plug rises a
tubular stem e screw-threaded to engage a correspondingly threaded opening in the
lower end of the plug F. Inasmuch as the body of the chamber D is carried by a
plug E, it follows that when the stem e of the plug is screwed into the opening
of the plug F, the upper edge of the chamber D will be forced to bear tightly

page_text: against an annular rubber gasket G on the bottom of the lamp-body B, against
which gasket will also tightly fit the upper edge of the generator chamber C,
thereby insuring a gas-tight joint between the parts at such points. The hollow
tubular stem e may be formed in piece with or separate from the plug E whereby
it is carried, but this stem will have a depending end e¹ that should extend to
approximately the bottom of the generating chamber C. The tubular stem e serves
as a channel for the admission of water to the generating chamber C and the
solid depending end-portion el serves as a delivery-rod or director for insuring the
accurate delivery of water to the proper point at the base of the mass of carbide C¹
within the generating chamber C. The mass of carbide C¹ is preferably held within
a supplemental casing C² of slightly smaller diameter than the chamber C, and this
mass of carbide C¹ will by preference be formed of the shape shown and for the
purpose to be hereinafter more fully set forth.
Through the lamp-body B, which constitutes the water reservoir, extends the
central tube F1 in the lower end of which the plug F is securely fitted. In the
upper end of the tube F1 is mounted a tubular support H at the top of which is
carried a burner H. Through the lamp-body or reservoir B extends a diagonally
disposed tube J that carries a plug valve K, the upper end of which is furnished
with a handle whereby it can be conveniently manipulated. In the upper end of
the plug valve K is formed a channel ', the lower angular portion of which com-
municates with a hole ; formed near the upper end of the tube J; and by means of
the channel ¹ and hole j air will be admitted to the chamber or reservoir B when
the parts are in the position seen in Fig. III of the drawing. In the lower end
of the plug valve K is formed a channel 2, the angular portion of which is adapted
to coincide with a hole j formed near the base of the tube J, and at the base of the
tube J a channel m is formed in the plug F and tube F¹.
When the parts are in the operative position shown in Fig. III, it will be seen
that water may pass from the lamp-body or reservoir B through the hole 2 and
channels and m to the upper end of the tubular stem e. The side walls of the
stem e are perforated as at e² to permit water to pass to the channels e³ formed in the
plug E. By reference to Fig. III it will be seen that the plug E is exteriorly
threaded and with it engages the threaded annular flange of the valve N, this valve
being formed with a seat n whereon will rest an annular washer ○ of felt or like
material that extends over the channels e³. The valve N is preferably milled to permit
it to be conveniently turned, and by turning this valve upward or downward, the felt
washer O can be caused to more or less obstruct the channels and thus regulate
with exactness the flow of water from the reservoir to the generating chamber.
will be understood of course that when the valve is set, it will seldom need regulation,
but when any shift of the valve is required the generating chamber C will be
removed and the desired adjustment of the valve will be effected. The lamp-body
or reservoir B will be provided with a suitable filling port B2 that will be closed by
the usual screw-threaded stopple B³.
It
Gas will pass from generating chamber C through small holes d formed in the
lower part of the chamber D, the size of these holes being such as to prevent the
escape from the generating chamber of any spent lime or like material that would
tend to clog the burner of the lamp. From the chamber D the gas will pass upward
through a channel f2 formed in the plug F, thence upward through the tube F¹, and
the burner support H to the tip of the burner H¹. Within the burner H₁ is located
a cleaning-needle P, the lower end of which is preferably set in the top of the
plug F and the point of the needle P is of proper size to enter the discharge
orifice of the burner tip and force therefrom any material that may have lodged
therein.
The burner support H is mounted to reciprocate in vertical direction, being pre-
ferably sustained upon a coil-spring R, the upper end of which bears against the
base of the burner support H while its lower end rests upon the upper end of the
plug F. Preferably, the burner support H is held within the tube F¹ by the means
inore particularly shown in Fig. IV of the drawing; that is to say, the upper end of

page_text: the tube F is formed with an annular expanded portion within which sets a pin h
that projects outwardly from the burner support H, this pin being admitted to the
annular expanded portion f³ by the vertical expanded portion . By reference to
Fig. IV, it will be seen that the annular expanded part 3 of the tube FI is con-
tracted adjacent the lower end of the channel f¹ so that after the pin b has been
forced below the channel f¹ a slight turn of the support H will bring the pin / to
one side of the contracted portion of the aunular chamber and thus guard against
the accidental release of the pin from the chamber when the support I is recipro-
cated. It will thus be seen that when the orifice of the burner H¹ has become
clogged, the burner support H and burner will be forced downward thereby causing
the point of the needle P to pass through the orifice of the burner and remove any
obstruction therefrom.
From the foregoing description it will be seen that when the parts are in the
position shown in Fig. III of the drawings, water will pass from the reservoir or
lamp-body B by the channels 2 and m to the tubular portion of the stem e whence
it will pass by the channel e³ on to the felt valve N and thence on to the outer sur-
face of the depending portion e¹ of the stem e which will serve to deliver the water
to the base of the mass of carbide within the generating chamber C. As the gas is
generated, it will pass upward by port d, channel f, tube F and burner support H,
to the tip of the burner H¹ where combustion will occur.
It is preferred that the lower portion e¹ of the stem or drip tube should be
encircled by a cover or jacket e of thin webbing or like porous material that
will serve to uniformly distribute the water around the entire surface of the
stem.
The main object in employing the supplemental casing or chamber C² for the
moulded mass of carbide is to permit the spent material to be more conveniently
removed from the generating chamber, but manifestly this supplemental casing C² is
not essential.
In lamps of this character it is important that the generation of gas should he
maintained practically uniform while the lamp is burning, and one object of this
invention is to so form the mass of carbide as to effect this result. The mass of
carbide is moulded in such shape that its inner wall shall stand at some distance
from the delivery or drip rod whereby the water supply is admitted to the generating
chamber, thus affording a space about the drip rod for the accumulation of the residue
or spent material. In the preferred form of the invention, the mass of carbide is
moulded with a cavity bounded by a wall gradually tapering or of decreasing thickness
from the bottom towards the top and preferably this wall is of cylindrical outline and
by preference also the cavity is of substantially inverted conoidal shape. It is not
essential, however, that the precise shape illustrated in the drawing should be given
to the mass of carbide.
By reference to Fig. III. it will be seen that as water in regulated quantity is
delivered by the drip rod, it will pass first to the bottom of the rod and will contact
with the carbide at such point, thus causing a generation of gas to ensue; the
residue or spent portion of the carbide will expand and accumulate about the lower
portion of the water delivery stem and will in great measure fill the cavity or space
adjacent thereto. This accumulation of the residue or spent portion of the carbide
will in a measure interfere with or retard the delivery of the water to the more remote
active portions of the mass of carbide. As the water, however, continues to be
delivered, it will contact with the residue or spent material that has risen about the
drip stem and will thereby be conducted outward into contact with fresh parts of the
carbide at higher points of the surrounding wall of the mass C¹, while at the same
time portions of the water supply will pass downward through the accumulated
residue or inert material and thence onward and so gradually attack the active
material around the lower portions of the mass. Thus it will be seen that by forming
the mass of carbide so that the residue or spent portion shall accumulate about the
drip stem, just sufficient carbide will be exposed to the incoming water supply to
compensate for the retarding action due to the accumulation of the residue or spent

page_text: material about the lower portion of the water delivery stem. Hence a substantially
uniform generation of gas will occur and a consequent substantially uniform flame at
the burner tip will be ensured.
Preferably the carbide is moulded with a cavity in its bottom into which the lower
end of the drip stem will set, the stem thus serving to prevent the racking of the mass
of carbide. In order to enable the carbidě to be moulded to the desired shape, it
will have mixed with it a suitable binding material such as tallow, oil, glucose or the
like that will enable it to retain the desired shape. This invention presents the first
instance, so far as I am aware, in which a mass of carbide has been so shaped and so
held with respect to the drip rod that as the carbide is consumed, the residue or spent
portion shall accumulate about the drip rod and serve to convey the water to the out-
lying higher portions of the carbide mass. It is believed also that this invention
offers the first instance of a mass of carbide surrounding a drip rod that is provided
with means whereby water is delivered to the outer surface of the rod and it is
designed that this feature broadly considered should be understood as of my
invention.
Inasmuch as lamps of this character are more particularly designed for use on
bicycles, carriages or like vehicles, it is desirable that provision be made for securing
the lamp in different positions in which it may be used. To accomplish this, the
means next to be described have been devised. Around the body of the lamp extends
a band or collar R preferably formed with an interior annular groove r¹ to receive a
corresponding annular rib 65 formed upon the body of the lamp or reservoir. To the
adjacent ends of the collar R are attached or formed in piece therewith, the arms r
between which are set the ends 8 of the clamping plates S, and through the arms r
and 8 passes an adjusting bolt T, the threaded end of which engages a thumb-nut t
whereby the arms r and s may be firmly clamped together. Preferably, the inner
faces of the arms and the outer faces of the arms s are serrated or milled to ensure
their firm engagement. The clamp-plates S are formed of the semi-annular grooved
portions to engage the neck, fork or other suitable part of the bicycle or whatever
part of the vehicle it is to be attached to, and preferably also the clamp-plates S are
formed with the depending end portions S¹ that will enable the lamp to be more
conveniently attached to certain parts of carriages or like vehicles upon which the lamp
is to be used.
Between the semi-circular portions of the clamp and its depending end-portions S¹
are the flat portions 8 through which passes the clamping-bolt V, the threaded end
of which is fitted with a thumb-nut whereby the other parts of the clamp can
be securely held in position upon the vehicle. By preference, the clamping-plates S
are interiorly lined with sheets of felt y (as indicated in dotted lines) to prevent injury
to the parts to which they are connected. By reference to Figs. I and II of the
drawings, it will be seen that if the clamp-plates are attached to the lamp in the
position there shown, the lamp may be connected to the steering post of a bicycle-
frame and the lamp inay be turned upward or downward before setting the thumb-
nut t in order to cast the light at any point along the road-way. If it is desired to
attach the lamp to the side fork of the machine, the body of the lamp will be
turned within the collar R at right angles to the position shown in Fig. 1. So also
when the lamp is turned to the last inentioned position, the clamp plates may serve
to connect it to the dash-board frame or any other convenient part of a carriage or like
vehicle.
It is manifest that the details of construction above set out may be varied by
the skilled mechanic without departing from the spirit of the invention and that
certain features of the invention may be employed independently of others.
Dated this 8th day of August 1800
(Signed)
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.

page_text: Improvements in Acetylene Generators and Lamps.
I, JOHN SCHUMACHER, of No. 46, Van Buren Street, in the City of Chicago,
County of Cook, State of Illinois, United States of America, Manufacturer, 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:
The present invention has for its object, first, to so shape the mass of carbide of
calcium as to insure a substantially uniform generation of gas therefrom; second, to
improve the construction of the lamp wherein the gas is burned, and third, to
provide improved means for holding the lamp in position for use. These several
objects of invention are accomplished by the novel features hereinafter described,
illustrated in the drawings accompanying my application for provisional protection
and particularly defined in the claims at the end of this specification.
Fig. I is a view in side elevation of a lamp embodying the invention, the globe
being shown in vertical section.
Fig. II is a plan view of the bracket whereby the lamp will be held in position
for use.
Fig. III is a view in central vertical section through the lamp.
Fig. IV is an enlarged detail view showing the manner of holding the burner-tip
in place.
The globe A of the lamp may be of any usual or suitable construction, being
preferably detachably connected to the lamp-body B. In the drawings the globe A
is shown as formed with an annular flange a at its base, this flange having inwardly
extending off-sets al adapted to enter corresponding angular grooves b that are
formed in the top annular flange b₁ of the lamp-body B. The off-set a¹ and the
angular grooves 6 form bayonet joints whereby the globe and the body of the lamp
are securely yet detachably connected together. Beneath the body B of the lamp
is mounted a generating chamber C, preferably of cylindrical shape, the upper end of
the chamber C being formed with exterior screw-threads adapted to engage with a
corresponding interiorly threaded flange b2 that depends from the base of the lamp-
body B and is rigidly connected therewith. Between the lamp-body B and the
generating chamber C is the gas-entry chamber D into which the gas from the
generating chamber C will pass before its delivery to the burner.
The body of the chamber D is formed from sheet-inetal, the bottom of
the chamber being perforated to receive a plug E rigidly fixed thereto, from which
plug rises a tubular stem e screw-threaded to engage a correspondingly threaded
opening in the lower end of the plug F. Inasmuch as the body of the chamber D is
carried by a plug E, it follows that when the stem e of the plug is screwed into the
opening of the plug F, the upper edge of the chamber D will be forced to bear
tightly against an annular rubber gasket G on the bottom of the lamp-body B,
against which gasket will also tightly fit the upper edge of the generator chamber C,
thereby insuring a gas-tight joint between the parts at such points. The hollow
tubular stem e may be formed in piece with or separate from the plug E whereby it
is carried, but this stem will have a depending end e¹ that should extend to approxi-
mately the bottom of the generating chamber C. The tubular stem e serves as a
channel for the admission of water to the generating chamber C and the solid
depending end-portion el serves as a delivery-rod or director for insuring the accurate
delivery of water to the proper point at the base of the mass of carbide C within
the generating chamber C. The mass of carbide C₁ is preferably held within a
supplemental casing C² of slightly smaller diameter than the chamber C, and this

page_text: mass of carbide C¹ will by preference be formed of the shape shown and for the
urpose to be hereinafter more fully set forth.
Through the lamp-body B, which constitutes the water reservoir, extends the
central tube F¹ in the lower end of which the plug F is securely fitted. In the upper
end of the tube I is mounted a tubular support H at the top of which is carried a
burner H. Through the lamp-body or reservoir B extends a diagonally disposed
tube J that carries a plug valve K, the upper end of which is furnished with a
handle whereby it can be conveniently manipulated. In the upper end of the plug
valve K is formed a channel k¹, the lower angular portion of which communicates
with a hole; formed near the upper end of the tube J; and by means of the channel k¹
and hole air will be admitted to the chamber or reservoir B when the parts are in
the position seen in Fig. 111 of the drawing. In the lower end of the plug valve K
is formed a channel 2, the angular portion of which is adapted to co-incide with a
hole formed near the base of the tube J, and at the base of the tube J a channel m
is formed in the plug F and tube F¹.
When the parts are in the operative position shown in Fig. III, it will be seen
that water may pass from the lamp-body or reservoir B through the hole j² and
channels and m to the upper end of the tubular stem e.
The side walls of the
stem e are perforated as at e² to permit water to pass to the channels e³ formed in the
plug E. By reference to Fig. III it will be seen that the plug E is exteriorly
threaded and with it engages the threaded annular flange of the valve N, this valve
being formed with a seat whereon will rest an annular washer O of felt or like
material that extends over the channels 3. The valve N is preferably milled to
permit it to be conveniently turned, and by turning this valve upward or downward,
the felt washer O can be caused to more or less obstruct the channels and thus
regulate with exactness the flow of water from the reservoir to the generating
chamber. It will be understood, of course, that when the valve is set, it will seldom
need regulation, but when any shift of the valve is required, the generating chamber C
will be removed and the desired adjustment of the valve will be effected. The
lamp-body or reservoir B will be provided with a suitable filling port 12 that will be
closed by the usual screw-threaded stopple B³.
Gas will pass from generating chamber C through small holes & formed in the lower
part of the chamber D, the size of these holes being such as to prevent the escape
from the generating chamber of any spent lime or like material that would tend to
clog the burner of the lamp. From the chamber D the gas will pass upward through
a channel f2 formed in the plug F, thence upward through the tube F¹, and the
burner support H to the tip of the burner H. Within the burner H¹ is located a
cleaning-needle P, the lower end of which is preferably set in the top of the plug F
and the point of the needle P is of proper size to enter the discharge orifice of the
burner tip and force therefrom any material that may have lodged therein.
The burner support H is mounted to reciprocate in vertical direction, being
preferably sustained upon a coil-spring R, the upper end of which bears against the
base of the burner support H while its lower end rests upon the upper end of
the plug F. Preferably, the burner support H is held within the tube F' by the
means more particularly shown in Fig. IV of the drawing; that is to say, the upper
end of the tube F¹ is formed with an annular expanded portion f³ within which sets a
pin h that projects outwardly from the burner support H, this pin being admitted to
the annular expanded portion f by the vertical expanded portion f. By reference
to Fig. IV, it will be seen that the annular expanded part 3 of the tube F¹ is con-
tracted adjacent the lower end of the channel so that after the pin 6 has been forced
below the channel fi a slight turn of the support H will bring the pin to one side
of the contracted portion of the annular chamber f and thus guard against the
accidental release of the pin from the chamber f when the support H is reciprocated.
It will thus be seen that when the orifice of the burner H¹ has become clogged, the
burner support H and burner will be forced downward thereby causing the point of
the needle P to pass through the orifice of the burner and remove any obstruction
therefrom.

page_text: From the foregoing description, it will be seen that when the parts are in the
position shown in Fig. III of the drawings, water will pass from the reservoir or
lamp-body B by the channels and m to the tubular portion of the stem e whence
it will pass by the channel e³ on to the felt valve N and thence on to the outer surface
of the depending portion el of the stem e which will serve to deliver the water to
the base of the mass of carbide within the generating chamber C. As the gas is
generated, it will pass upward by port d, channel f², tube F and burner support H, to
the tip of the burner H₁ where combustion will occur.
It is preferred that the lower portion e¹ of the stem or drip tube should be encircled
by a cover or jacket e" of thin webbing or like porous material that will serve to
uniformly distribute the water around the entire surface of the stem.
The main object in employing the supplemental casing or chamber C for the
moulded mass of carbide is to permit the spent material to be more conveniently
removed from the generating chamber, but manifestly this supplemental casing C²
is not essential.
In lamps of this character, it is important that the generation of gas should be
maintained practically uniform while the lamp is burning, and one object of this
invention is to so for the mass of carbide as to effect this result. The mass of
carbide is moulded in such shape that its inner wall shall stand at some distance from the
delivery or drip rod whereby the water supply is admitted to the generating chamber,
thus affording a space about the drip rod for the accumulation of the residue or spent
material. In the preferred form of the invention the mass of carbide is moulded with
a cavity bounded by a wall gradually tapering or of decreasing thickness from the
bottom towards the top and preferably this wall is of cylindrical outline and by
preference also the cavity is of substantially inverted conical shape. It is not
essential, however, that the precise shape illustrated in the drawing should be
given to the mass of carbide.
By reference to Fig. III it will be seen that as water in regulated quantity is
delivered by the drip rod, it will pass first to the bottom of the rod and will contact
with the carbide at such point, thus causing a generation of gas to ensue; the
residue or spent portion of the carbide will expand and accumulate about the lower
portion of the water delivery stem and will in great measure fill the cavity or space
adjacent thereto. This accumulation of the residue or spent portion of the carbide
will in a measure interfere with or retard the delivery of the water to the more
remote active portions of the mass of carbide. As the water, however, continues,
to be delivered it will contact with the residue or spent material that has risen about
the drip stem and will thereby be conducted outward into contact with fresh parts
of the carbide at higher points of the surrounding wall of the mass C¹, while at the
same time portions of the water supply will pass downward through the accumulated
residue or inert material and thence outward and so gradually attack the active
material around the lower portions of the mass. Thus it will be seen that by forming
the mass of carbide so that the residue or spent portion shall accumulate about the
drip stem, just sufficient carbide will be exposed to the incoming water supply to
compensate for the retarding action due to the accumulation of the residue or spent
material about the lower portion of the water delivery stem. Hence a substantially
uniform generation of gas will occur and a consequent substantially uniform flame at
the burner tip will be ensured.
Preferably the carbide is moulded with a cavity in its bottom into which the lower
end of the drip stem will set, the stem thus serving to prevent the racking of the
mass of carbide. In order to enable the carbide to be moulded to the desired shape
it will have mixed with it a suitable binding material such as tallow, oil, glucose or
the like that will enable it to retain the desired shape. This invention presents the
first instance, so far as I am aware, in which a mass of carbide has been so shaped
and so held with respect to the drip rod that as the carbide is consumed, the
residue or spent portion shall accumulate about the drip rod and serve to convey the
water to the outlying higher portions of the carbide mass. It is believed also that
this invention offers the first instance of a mass of carbide surrounding a drip rod

page_text: that is provided with means whereby water is delivered to the outer surface of the rod
and it is designed that this feature broadly considered should be understood as of my
invention.
To
Inasmuch as lamps of this character are more particularly designed for use on
bicycles, carriages or like vehicles, it is desirable that provision be made for securing
the lamp in different positions in which it may be used. To accomplish this, the
means next to be described have been devised: Around the body of the lamp extends
a band or collar R preferably formed with an interior annular groove r¹ to receive a
corresponding annular rib 65 formed upon the body of the lamp or reservoir.
the adjacent ends of the collar R are attached or formed in piece therewith, the
arms between which are set the ends s of the clamping plates S, and through
the arms and s passes an adjusting bolt T, the threaded end of which engages a
thumb-nutt whereby the arms r and s may be firmly clamped together. Preferably,
the inner faces of the arms and the outer faces of the arms 8 are serrated or
milled to insure their firm engagement. The clamp-plates S are formed of the
semi-annular grooved portions to engage the neck, fork or other suitable part of the
bicycle or whatever part of the vehicle it is to be attached to, and preferably also
the clamp-plates S are formed with the depending end portions S' that will enable
the lamp to be more conveniently attached to certain parts of carriages or like
vehicles upon which the lamp is to be used.
Between the semi-circular portions of the clamp and its depending end-portions S¹
are the flat portions s' through which passes the clamping-bolt V, the threaded end
of which is fitted with a thumb-nut v whereby the outer parts of the clamp can be
securely held in position upon the vehicle. By preference, the clamping-plates S are
interiorly lined with sheets of felt y (as indicated in dotted lines) to prevent injury
to the parts to which they are connected. By reference to Figs. I and II of the
drawings it will be seen that if the clamp-plates are attached to the lamp in the
position there shown, the lamp may be connected to the steering post of a bicycle-
frame and the lamp may be turned upward or downward before setting the thumb-
nut in order to cast the light at any point along the road-way. If it is desired to
attach the lamp to the side fork of the machine, the body of the lamp will be turned
within the collar R at right angles to the position shown in Fig. 1. So also when
the lamp is turned to the last mentioned position, the clamp plates may serve to
connect it to the dash-board frame or any other convenient part of a carriage or like
vehicle.
It is manifest that the details of construction above set out may be varied by the
skilled mechanic without departing from the spirit of the invention and that certain
features of the invention may be employed independently of others.
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. A gas generator comprising a liquid reservoir, a vertically arranged delivery
stem beneath said reservoir, means for delivering water down the exterior of said stem
and a holder or shell for sustaining a moulded mass of calcium carbide around said
stem.
2. A gas generator comprising a liquid reservoir, a vertically arranged delivery stem
beneath said reservoir, means for delivering water to the exterior of said stem and a
porous cover or jacket about said drip stem.
3. A gas generator comprising a reservoir, a generating chamber beneath said
reservoir, a suitable water channel connecting said reservoir and said generating
chamber, a valve for controlling the passage of water through said channel and a
delivery stem the exterior of which connects with the water channel, whereby the water
will be directed over the outer surface of said stem.
4. A gas generator comprising a liquid reservoir, a generating chamber beneath said
reservoir, a suitable channel for delivering water from the reservoir to said generating

page_text: chamber, a felt or like porous packing obstructing the passage whereby water is delivered
to the generating chamber, and a valve for compressing said packing in order to retard
the flow of liquid into said generating chamber.
5. A gas generator comprising a liquid reservoir, a generating chamber beneath said
reservoir, a suitable channel for delivering water from said reservoir to said generating
chamber, a felt or like porous packing for obstructing the passage of liquid to the
generating chamber, and a valve for compressing said packing provided with a screw
whereby the shifting of said valve may be effected.
6. A gas generator comprising a liquid reservoir, a generating chamber beneath said
reservoir, a delivery stem having a tubular perforated upper end connected with said
reservoir and having its lower end extending to approximately the bottom of the
generating chamber, a screw-threaded plug or boss encircling said stem and provided
with a channel communicating with the interior thereof, and a valve for controlling
the passage of liquid through said plug or boss provided with a screw-threaded flange
to engage the threaded part of said plug or boss.
7. A gas generator comprising a liquid reservoir, a generating chamber beneath
said reservoir, an intermediate chamber between said liquid reservoir and said
generating chamber, said generating chamber and said intermediate chamber being
detachably connected to the base of said liquid reservoir.
8. A gas generator comprising a liquid reservoir, a generating chamber beneath
said reservoir detachably connected thereto, a stem detachably connected to said
liquid reservoir and provided with a channel for the passage of liquid therethrough
and a chamber carried by said stem and detachably connected thereby to the liquid
reservoir.
9. A gas generator comprising a liquid reservoir, a tube extending through said
reservoir and provided with ports for the admission of air and discharge of liquid,
and a valve located within said tube and serving to simultaneously control the
admission of air and discharge of liquid respectively to and from said
reservoir.
10. A gas generator comprising a liquid reservoir, a generating chamber beneath
said reservoir, a suitable channel or passage-way for liquid from said reservoir to said
generating chamber, a tube extending through said reservoir and having its lower
end provided with a port and communication with a passage-way for liquid and
having its upper end provided with an air admission port, and a plug valve within
said tube provided with channels through which air may pass to the reservoir and
through which liquid may discharge therefrom.
11. A gas generator comprising a burner and a needle within said burner, said
needle and said burner being relatively movable whereby the needle may be forced
through the orifice of the burner.
12. A gas generator comprising a vertically movable burner and a fixed needle
adapted to enter the orifice of the burner to free the same from obstruction.
13. A gas generator comprising a spring-seated burner, a needle located within
said burner and having a point adapted to enter the orifice of the burner and clear
the same from obstruction.
14. A gas generator comprising a liquid reservoir, a vertically arranged tube
within said reservoir, a vertically movable burner support within said tube, a burner
carried by said support and a needle located within said burner support and adapted
to enter the orifice of the burner to clear the same from obstruction.
15. A mass of calcium carbide having a wall of gradually decreasing thickness from
bottom towards the top.
16. A mass of calcium carbide having a cavity of substantially inverted conoidal
outline.
17. The combination with a lamp-body, of an encircling band revolubly connected
to said lamp-body, means for tightening said band upon the body and a bracket
adjustably connected to said band and whereby the lamp can be sustained.
18. The combination with the lamp-body, of an encircling band revolubly connected
with said lamp-body and provided with projecting arms, a clamp or bracket for

page_text: sustaining the lamp having ends engaging the arms of the encircling band, and an
adjusting screw connecting said arms and said clamp ends and whereby the lamp may
be held in different horizontal planes.
Dated this 12th day of April 1899
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.