Improvements in Hurricane Lanterns.
Year: 1891

page_text: Date of Application, 13th June, 1891
Complete Specification Left, 2nd Sept., 1891-Accepted, 3rd Oct.. 1891
PROVISIONAL SPECIFICATION.
Improvements in Hurricane Lanterns.
I, WILLIAM LIGHBODY, of the firm of Thomas Rowatt & Sons, of 9, 10,
11 and 12, Radsworth Street, City Road, in the County of London, and of
126, Fountain Bridge, Edinburgh, in the County of Midlothian, Lamp Manufac-
turers, do hereby declare the nature of this invention to be as follows:-
My invention relates to hurricane lanterns, and has for its object to provide
improved means for regulating the supply of air to the burners of such lanterns.
Hurricane lanterns, as hitherto manufactured, are provided with tubes which
convey the air for supporting combustion from the head of the lamp to the burner;
as, however, this air is more or less vitiated, it does not properly support the com-
bustion of the flame.
According to my invention I provide for the admission of pure atmospheric air
into the said air tubes, so that the air passing therethrough is more or less enriched
with oxygen. This admission of air is advantageously brought about by introducing
into the said air tubes pipes having perforations extending from the exterior to
the interior of the said air tubes.
Furthermore I find the flame to burn more steadily by placing upon the chimney
or globe gallery a perforated cap or shield fitting closely around the dome of the
burner, or instead of using a cap or shield I may employ a series of rings of metal
or the like, either perforated or unperforated.
Dated the 13th day of June 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Hurricane Lanterns.
I, WILLIAM LIGHBODY, of the firm of Thomas Rowatt & Sons, of 9, 10,
11 and 12, Radsworth Street, City Road, in the County of London, and of
126, Fountain Bridge, Edinburgh, in the County of Midlothian, Lamp Manufac-
turers, 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 :-
My invention relates to hurricane lanterns, and has for its object to provide
improved means for regulating the supply of air to the burners of such lanterns.
Hurricane lanterns, as hitherto manufactured, are provided with tubes which
convey the air for supporting combustion from the head of the lamp to the burner;
as, however, this air is more or less vitiated, it does not properly support the com-
bustion of the flame.
According to my invention I provide for mixing with the vitiated air passing
through the said air-tubes more or less pure atmospheric air. This admission of
atmospheric air is advantageously brought about by introducing into the said air-
tubes pipes having perforations.
Furthermore I find the flame to burn more steadily by placing upon the chimney
or globe gallery a perforated cap or shield fitting closely around the dome of the
burner, or instead of using a cap or shield I may employ a series of rings of metal
or the like, either perforated or unperforated.

page_text: To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawings, in which :--
Figure 1 is a sectional elevation of a hurricane hand lantern provided with my
improvements; and,
Figure 2 is a view of a detail:
Figure 3 shews a hurricane lantern adapted for street lighting; and,
Figure 4 is a sectional plan' of the same on the line, Figure 3.
Similar letters of reference indicate corresponding parts in the several figures.
a indicates the oil reservoir, b the burner, c, c the air-tubes,,c' the head of the
lamp, and d the globe or chimney, all of which parts are of well known construction
and therefore require no description.
e, e are my perforated pipes which are passed through the air-tube near to the
burner in a manner which will be readily understood by reference to Figure 2; the
said pipes being perforated upon one side only so that when fixed in position the air
will pass through the said perforations in the same direction as the current of air
passing from the head of the lantern down the air-tubes, as indicated by the arrows.
With this arrangement it will be readily understood that the partly vitiated and
rarefied air passing down the air-tubes will mingle with pure atmospheric air which
will enter through the pipes e, e, so that the said vitiated air will be more or less
enriched with oxygen before passing to the burner, thereby causing the flame of the
lamp to burn more brightly than when such flame is only supplied with air passing
from the head of the lantern.
✓ indicates the cap or shield arranged around the burner and which serves to
divide or break the air current entering the globe and thus to cause the flame to
burn steadily.
up
The arrangement shewn in Figures 3 and 4 wherein my invention is shewn applied
to a hurricane lantern for street lighting is substantially the same as that herein-
before described; in this case, however, the air-tubes pass down the corners of the
lantern, as shewn.
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. In a hurricane lantern, the provision of means whereby the air passing from
the head of the lantern to the burner will be more or less enriched with atmospheric
air, substantially in the manner, and for the purpose, described.
2:1 In a hurricane lantern of the kind herein before described, the combination
with the air-tubes of perforated pipes for allowing the admission of atmospheric air
into the said tubes, substantially as, and for the purpose, described.
E
3. In a hurricane lantern, the combination with the burner thereof of a shield,,
such'as f,.substantially as; and for the purpose, described.
4. The improvements in hurricane lanterns hereinbefore described and illustrated
in the accompanying drawings.
ננ.נ.י.מ
£ Cantaben 1901
4, South
G. F. REDFERN & Co.,
Street, Finsbury, London, Agents for the Applicant.