Improvements in Lanterns.
Year: 1897

page_text: Date of Application, 21st Sept., 1897
Complete Specification Left, 21st June, 1898-Accepted, 27th Aug.,
1898
Improvements in Lanterns.
We, ARTHUR COLLINGS WELLS, Engineer, of the Firm of A. C. Wells & Co.,
of 103, Midland Road, St. Pancras, in the County of London, and EDWARD GRUBE,
Engineer, of Alt-Rahlstedt, Holstein, in the Empire of Germany, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in lanterns, and has reference more
particularly to what are known as hurricane lanterns.
In this kind of lantern the glass globe is usually very wide, and therefore causes
inconvenience in packing and as it is the most prominent portion of the lamp it
is very liable to receive injury.
Now according to our invention we overcome these objections by dispensing
with the globe and substituting therefor a chimney of comparatively small
diameter the upper part of which is of metal while the lower part in proximity
to the flame is of suitable transparent material. This chimney may be made
removable and its upper or metal portion may be connected to a pair of plates
which form the upper and lower end covers of the air chamber or drum usual at
the top of a hurricane lamp. A transverse metal strip or bridge piece is secured
to the upper plate and the extremities of this bridge piece are suitably shaped to
engage projections on the outer wall of the said air chamber.
The end covers of the air chamber need not be actually secured to the outer wall
thereof but may only fit closely thereto and the arrangement may be such that
after the ends of the bridge piece have been disengaged, the chimney and the
aforesaid end covers can all be lifted away together from the rest of the lamp.
According to one construction, the chimney has an upper tapered portion of
sheet metal while its lower end is closed by a metal cap having a central aperture
to fit over the lamp cone. The transparent portion of the chimney may be formed
say of three pieces of mica secured in position by metal strips and these strips may
advantageously have inwardly projecting ribs or beadings against which the edges
of the pieces of mica press with sufficient force to keep the said pieces normally
in their proper position, whilst however allowing them to be readily disengaged
should it be desired to remove them say for the purpose of cleaning them or for
replacing them by fresh pieces.
The plates forming the end covers of the air chamber are carried by vertical
arms which extend upward from the metal portion of the chimney, and the trans-
verse metal strip or bridge piece has its ends projecting horizontally beyond the
edges of the upper plate and formed with notches or recesses which can be caused,
by giving a partial turn, to engage the upright stems of the eyes or loops in
which the handle is secured.
The upper one of the aforesaid end covers has a flanged edge which fits over the
top edge of the outer wall of the air chamber or drum, while the lower one has
also a flanged edge adapted to fit closely against the inner side of the said wall.

page_text: The lower cover also has a central aperture or perforation and care is taken that
the joints between the end covers and the outer wall of the air chamber, while
sufficiently tight to prevent undue entrance of air, are not so tight as to interfere
with the removal of the said end covers and chimney when such is desired.
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Improvements in Lanterns.
We, ARTHUR COLLINGS WELLS, Engineer, of the Firm of A. C. Wells & Co.,.
of 103, Midland Road, St. Pancras, London, and EDWARD GRUBE, Engineer, of
Alt-Rahlstedt, Holstein, in the Empire of Germany, do hereby declare the nature'
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:-
This invention relates to improvements in lanterns, and has reference more
particularly to what are known as hurricane lanterns.
In this kind of lantern the glass globe is usually very wide, and therefore causes
inconvenience in packing, and as it is the most prominent portion of the lamp it
is very liable to receive injury.
Now according to our invention we overcome these objections by dispensing
with the globe and substituting therefor a chimney of comparatively small
diameter the upper part of which is of metal while the lower part in proximity
to the frame is of suitable transparent material. This chimney is made
removable and its upper or metal portion is preferably connected to a pair of plates
which form the upper and lower end covers of the air chamber or drum usual at
the top of a hurricane lamp. A transverse metal strip or bridge piece is secured
to the upper plate and the extremities of this bridge piece are suitably shaped to
engage projections on the outer wall of the said air chamber.
The end covers of the air chamber need not be actually secured to the outer wall
thereof but may only fit closely thereto and the arrangement may be such that
after the ends of the bridge piece have been disengaged, the chimney and the
aforesaid end covers can all be lifted away together from the rest of the lamp.
In order that our said invention may be clearly understood and readily carried
into effect we will now proceed to describe the same more fully with reference to
the accompanying drawings in which;
-
Figure 1 is a central vertical section, and
Figure 2 a plan of our improved hurricane lamp.
Figure 3 is a transverse section on the line of Figure 1.
Figure 4 is a side elevation of the chimney removed from the lantern.
A is the lamp chimney and B is the air chamber or drum which occupies the
position usual in lamps of this description and is connected to the burner C by
the hollow side arms DD through which the air passes from the drum B to the
burner as is well understood.
The chimney has an upper tapered portion a of sheet metal while its lower end
is closed by a perforated metal cap a having a central aperture to fit over the
lamp cone c. The transparent portion of the chimney is preferably formed of
sheets or pieces of mica a². These sheets or pieces of mica are secured in position
by metal strips a³ having inwardly projecting ribs or beadings as against which
the edges of the sheets or pieces of mica press with sufficient force to keep them-

page_text: selves normally in their proper position, whilst permitting of their being readily
disengaged should it be desired to remove them, for the purpose of cleaning them
or for replacing damaged sheets by fresh ones.
The plates bb¹ forming the end covers of the air chamber B are carried by
vertical arms 6262 which extend upward from the metal portion a of the chimney,
and the transverse metal strip or bridge piece 63 has its ends projecting horizon-
tally beyond the edges of the upper cover 6¹ and formed with notches or recesses b¹
which can, by giving a partial turn to the chimney be caused to engage with the
68 is a loop
upright stems 5 of the eyes 66 in which the handle 67 is secured.
with which the bridge piece 63 is provided to enable the chimney to be readily
turned.
The
The aforesaid upper end cover 6' has a flanged edge which fits over the top edge
of the outer wall of the air chamber or drum B, while the lower cover b has also
a flanged edge adapted to fit closely against the inner side of the said wall.
lower cover also has a central aperture or perforation 6 for the heated-air ascend-
ing from the flame of the lamp to enter the air chamber B.
In order to remove the chimney from the lantern a partial turn is given to the
strip in the direction of the arrows, (Figure 2), whereby the recesses 6* are
released from the handle loop stems 6, and the chimney together with the
plates and b, can be lifted out of the lantern as shown in Figure 4.
Care should be taken that the joints between the end covers 6 6' and the outer
wall of the air chamber, be sufficiently tight to prevent undue entrance to the
chamber of cool air, without being so tight as to interfere with the removal of
the chimney and the said end covers as above stated.
said
Having now particularly described and ascertained the nature of our
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. A hurricane lantern provided with a chimney composed partly of metal and
partly of transparent material and adapted to be removed through the air chamber
of the lantern substantially as described and for the purpose specified.
2. In a hurricane lantern the combination with a detachable chimney having an
upper metal part and a lower translucent part, of a pair of metal plates forming
the upper and lower end covers of the air chamber substantially as described and
for the purpose specified.
3. The manner of securing the translucent sections of the lantern chimney in
position by inwardly projecting ribs or beadings against which the vertical edges
of the translucent sections bear, substantially as described and for the purpose
specified.
4. A lantern constructed substantially as herein described with reference to the
accompanying drawings for the purpose specified.
T1902
HASELTINE LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.