Improvements in Tubular Lanterns.
Year: 1892

page_text: Date of Application, 9th Feb., 1892
Complete Specification Left, 9th Nov., 1892-Accepted, 10th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Tubular Lanterns.
I, JOHN GRAHAM HARDIE of 8, Victoria Pathway, Queen's Park, Chester, in
the County of Chester, Commercial Traveller do hereby declare the nature of this
invention to be as follows:-
My invention consists of a new and simple arrangement, applicable to any pattern
of what are known as hurricane or tubular lanterns, so as to do away with the open
space between the plate of the air chamber and the top of the globe, and by closely
covering the same with a perforated or slotted sheet metal cover, to effectually
prevent the flame being extinguished by the wind; and to ensure a bright and
steady flame in any weather.
The cover is placed above the globe and below the plate of the air chamber,
which is also slotted. The cover and the plate of the air chamber are conformable.
to, and fit within each other.
To the cover is rivetted, flanged, or otherwise attached, a perforated or slotted
heet metal tube, that vertically penetrates by means of a tubular guide the plate
of the air chamber, and is secured within the air chamber, by a circular wire handle
passing through it, and also through horizontal slots in the tube.
I employ the handle as a lever also, for raising the tube and cover free of the
globe, so as to facilitate its removal for lighting, trimming, cleaning, etc.
Further, the handle is employed for bringing the tube and cover closely down, to
completely cover the top of the globe, thereby protecting the flame, and holding the
globe securely in position; and I carry my invention into effect in the following
manner, which the accompanying drawings fully illustrate.
Fig. 1 shows the sheet metal cover A of convenient form to fit closely over the
top of the globe R (Fig. 3); and for the proper egress of the heated air, it may
either be slotted in the manner denoted by B, or perforated as Fig. 5.
To the cover A is rivetted, flanged, or otherwise fastened, the connecting air
tube C., which likewise may either be slotted as shewn at D, or perforated as
Fig. 5 but seamed in preference to being soldered, and with two horizontal
slots F. F. cut opposite to each other, through which the circular wire handle K.
(Fig. 3) passes.
The plate G. (Fig. 2) of the air chamber is constructed of the same form as the
cover A., but enlarged sufficiently for the cover A. to lie evenly within it, and the
slots I. round the top, are made sufficiently large to admit an abundance of atmo-
spheric air, for the purpose of complete combustion.
To the plate G. I attach by solder or otherwise a short tubular guide H, that
exactly encircles the tube C. in which it slides vertically without any play.
I now proceed to explain, wherein my said invention can be adapted to the old
parts of the ordinary air chamber lantern, now in use; and upon reference to the
drawings, it will be seen that Fig. 3 shows a front elevation of a hurricane lantern,
with the air chamber J. partly in section, showing the plate G, fixed at the base of
the air chamber J, the tube C being inserted through the tubular guide H, and held
in vertical position, by the circular wire handle K passing through the horizontal
slots F. F., as well as through the eyes Q. Q. of the air chamber J; and thereby
pressing the cover A against the top edge of the globe R, serving
(1) To keep the globe R securely in position.
(2) To protect the flame from any down draught.
(3) To ensure perfect combustion.

page_text: tubular or hurricane lanterns, which have an open space between the top of the
globe R. and the plate G of the air chamber J.
P is the gallery or perforated metal disc that supports the globe R; O is the
reservoir of the lantern. The air chamber J, is by means of the curved tubes L. L,
connected with the air receiver M, surrounding the buruer N. The air receiver M,
being slightly perforated, admits a little external air, that mingles with the current
of heated air passing down the tubes L. L, and afterwards conveyed to the
burner N.
When for any purpose it is necessary to remove the globe R (from the position
shewn at Fig. 3, to that shewn in side elevation at Fig. 4;) such. as for lighting, the
handle K admits of being lowered in one direction only, as shewn by Fig. 4. By
this motion of the handle K, the part of it enclosed within the air chamber .J. travels
along the horizontal slots F. F, and acts as a lever, by which the cover A is raised
free of the globe R, by passing into the recess in the plate G.
When the globe R is returned to its normal position, by simply raising the
handle K. into a perpendicular position (as for carrying) the cover A. descends
closely upon the globe R, and remains stationary there, holding it securely in
position.
An alternative means, other than by the wire handle K, of raising or lowering
the cover A, is shewn at Fig. 6. A. is the cover, and attached to it is the per-
forated or slotted connecting air tube (, which is enclosed within the tubular
guide H, it being soldered or otherwise fastened to the plate G. of the air chamber.
In the tubular guide H I punch two angular slots S. S, opposite to each other,
through which project metal pins U, that are secured inside to the tube C. When
therefore the cover A. is by means of the catch T turned round from right to left,
the pins U attached to the tube C. and working in the angular slots S. S. descend,
carrying the cover A. with them; and in like manner when turned in the opposite
direction, the cover A is raised free of the globe R, by-passing into the recess in the
-plate G.
-
==
-Dated this 8th day of February 1809
COMPLETE SPECIFICATION.
Improvements in Tubular Lanterns.
I, JOHN GRAHAM HARDIE, of 8 Victoria Pathway, Queen's Park, Chester, in
the County of Chester, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to that class of lanterns commonly known as hurricane or
tubular lanterns.
My improved lantern is designed to protect the flame from any down draught
and effectually prevent it from being extinguished in a storm, to insure a bright and
steady flame in any weather, to keep the globe securely in position, and to protect
the same from being accidentally broken.
Down draughts are prevented, according to my invention, by doing away with
the open spaces between the plate of the air chamber and the top of the glass
chimney, and by closely covering the latter with a perforated metal cover effectually
preventing the flame being extinguished by the wind and insuring a bright and
steady flame in any weather. This cover is placed above the chimney and can be
raised when required to admit of the glass chimney being removed.
The invention will be understood from the following description, reference being
had to the accompanying drawings, in which :-
1
Figure 1 is a front elevation of the lantern, partly in section;
Figure 2, a side elevation thereof, partly in section;
.
Figure 3, a view of the movable perforated cover for the chininey;

page_text: :
Figure 4, a view of the bottom plate of the air chamber;
Figure 5, a view of a slight modification of Figure 3, in which round' perforations
are provided instead of slots;
Figures 6 and 7, views of the bottom plate of air chamber and the movable cover
showing other ways of operating the latter.
Referring to Figures 1 to 5 inclusive :-.
A, is the glass chimney of the lamp: B, the gallery for supporting the same:
C, the oil reservoir: D, the air chamber; and E, the side:tubes connecting the-air
receiver F, surrounding the burner, with the said air chamber D. The air
receiver F may be slightly perforated to admit a little external air, that mingles
with the current of heated air passing down the side tubes E, and is afterwards
conveyed to the burner. This air chamber D is provided with a stationary plate H,
having a short tubular sleeve H' and slots or perforations of sufficient size to admit
a plentiful supply of atmospheric air for combustion. I is a movable cover of
convenient form adapted to fit closely over the top of the glass chimney A, and, for
the proper egress of the heated air, is slotted or perforated. To this cover, I, is
fastened a connecting tube. I', which is also slotted or perforated and provided with
slots I through which the handle J passes. The tube I¹ penetrates the air chamber
by means of the tubular sleeve H, and vertically slides therein, and is secured
within the air chamber by the circular wire handle J passing through the horizontal
slots in the tube, as well as through eyes in the walls of the air chamber. The
cover I, when raised above the chimney, is conformable to and adapted to lie
approximately flush within the plate H. The lantern can be carried by the said
handle J. K is the guard surrounding the chimney for preventing the same being
accidentally broken. It is made to open and close so that, when hinged back, the
chimney can easily be removed. It is made of wire, and one leg is fixed at the
middle of cross bar between the tubes K', which are soldered to the perforated
gallery. The other leg divides below the gallery and (without in any way being
attached) passes under or round underneath outside rim of same, and is secured by
loops at the outer ends of the same cross bar to which the other leg is attached.
The mode of action is as follows:-
a
When the lantern is in use, the cover I, with the handle J in position shown in
Figure 1, is pressed against the top of the glass chimney, serving to keep the
chimney securely in position and also to protect the flame from any down draught,
at the same time permitting a sufficient current of air to pass through the
lamp to support combustion. When however, for any reason, such as for lighting
the lamp, it is necessary to remove the glass chimney from the position shown in
Figure 1 to that shown by dotted lines in Figure 2, the handle J is turned down as
depicted in Figure 2. By this motion of the handle, the part enclosed within the
air chamber D acts as a lever and raises the cover I clear of the top of the chimney.
This enables the chimney to be moved. When the glass chimney is returned into
its normal position, the handle J simply raised into the perpendicular (as for
carrying the lantern), by which movement the cover I descends closely upon the
top of the glass chimney, and remains stationary there, holding it in position.
An alternative means other than by the wire handle J, for raising or lowering
the cover I, is shown in Figure 6, in which H is the base plate of the air chamber,
H' the slotted air tube, and I the movable cover provided with a tube which is
received by the tubular sleeve H*.
In the tubular guide H', I punch two angular slots L, opposite to each other,
through which project two metal pins L' that are secured to the inside tube. When,
therefore, the cover I is, by means of the catch M, turned round from right to left,
the pins L, attached to the said tube and working in the angular slots, descend,
carrying the cover M with them, and in like manner, when turned in the opposite
direction, the cover I is raised free of the glass chimney by passing into the recess
in the plate H.
Another alternative means, other than by the wire handle, is shown in Figure 7,
in which the perforated cover can be worked automatically. To the cover I, are

page_text: attached two semicircular pieces of wire N, placed parallel to each other and also
passing through holes in the base plate H of the air chamber. When the chimney A
is turned down, as shown, the side of cover I, with gap or opening i, is tilted and
allows the top of chimney to pass out. By that means, the cover is placed in
position to receive the top of chimney back into position and is then so tilted that it
rests securely on the top. It will also permit chimneys of unequal heights being
used.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, 1 declare that what
I claim is :-
:-
1. The use, in combination with a hurricane or tubular lantern, of a slotted or
perforated metal cover adapted to closely fit or press on the top of the glass
chimney, but rendered vertically adjustable by means of suitable guides, substan-
tially as and for the purposes described.
2. The use, in combination with a hurricane or tubular lantern, having a vertically
adjustable and perforated or slotted metal cover adapted to closely fit on the top of
the chimney, of means, substantially as described, whereby the cover can be raised
or tilted clear of the chimney when required to facilitate its removal for lighting,
trimming, cleaning, etcetera, and can he lowered or re-adjusted on the top of the
chimney to protect the flame from down draught and hold the chimney in position.
3. In a hurricane or tubular lantern, the combination, with the air chamber D, of
a stationary perforated_sheet_metal plate H (recessed if desired) forming the base
of said air chamber, and a tubular sleeve H₁ secured to said plate and forming a
guide for the vertically adjustable cover I, substantially as set forth.
4. The general combined arrangement and construction of parts forming my
improved hurricane or tubular lantern substantially as described.
Dated this 8th day of November 1892.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.