IMPROVEMENTS IN LAMP BURNERS
Year: 1877

page_text: LETTERS PATENT to Thomas Rowatt, Junior, of the City of London, for the
Invention of "IMPROVEMENTS IN LAMP BURNERS"
11
T
PROVISIONAL SPECIFICATION left by the said Thomas Rowatt at the
Office of the Commissioners of Patents on the 8th February 1877.
THOMAS ROWATT, Junior, of the City of London “IMPROVEMENTS IN LAMP
BURNERS"
This Invention relates to that class of lamp burners having double wicks and
inner and outer domes slotted in the crown with two curved slots, said slots being
divided one from the other by a bar or piece of the metal forming the dome, and
the object of this Invention is to so construct the burner that a greatly increased
and more brilliant light will be obtained from the same sized wicks, and equal
consumption of oil.
In oider that my said Invention may be well understood, I have hereunto
annexed a Sheet of Drawings illustrative thereof, and will now describe the same
and refer in the following description to the said Diawings by figures and letters of
reference
Fig 1 represents the burner and wick tubes constructed according to this Inven-
tion, and Fig 2 represents a modification ther cof, Fig 3 is a plan view of the inner
domo, Fig 4, a like view of the outer dome, both constructed in substantially
the ordinary manner, and Fig 5 represents in plan the arrangement of burner
shewn in Fig. 1, but with the inner and outer domes in position, and illustrates the
elation of the wick tubes to the curved slots in the curved clowns of said inner and
outer domes
In carrying out this Invention I make the wick tubes a of a curved form, as
shewn in Figures 1, 2, & 5, and with the convexity of the curves or the backs of
the said curved wick tubes a towards cach other, and around the said wick
tubes I arrange a metal screen or partition b, preferably perforated, screen being
arranged to surround and also separate the wick tubes, as shewn at c, Fig 1, or
said screen is made of other required form, and with a midfeather c¹, as illustrated

page_text: in Fig 2, to separate the wick tubes, thus securing to each wick its own proper air
current
The bioken line d, Figs 1 and 3, indicates the outer edge of the gallery, and e, the
im upon which the inner done is placed previously to the outer dome being fixed
in position
The other parts of the burner not before referred to, such as the screws and
buttons for elevating and lowering the wicks and means for attachment to the
lamp oi oil reservon are the same as usual, and therefore not shewn
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Rowatt in the Great Seal Patent Office on the 8th August
1877
THOMAS ROWATT, Junior, of the City of London.
BURNERS
"1
"IMPROVEMENTS IN LAMP
This Invention relates to that class of lamp burners having double wicks and
inner and outer domes, each of which domes is slotted in the crown with two
curved slots divided from each other by a bar or piece of the metal forming the
dome, and the object of this Invention is to so construct the burner that a greatly
increased and more brilliant light will be obtained from the saine sized wicks and
with equal consumption of oil
And in order that my said Invention may be fully understood, I shall now
proceed more particularly to describe the same, and for that purpose shall refer to
the several Figures on the accompanying Diawing, the same letters of referenco
indicating corresponding parts in all the Figures
Fig 1 is a section of my improved lamp burner, Fig 2, a plan thereof with
inner and outer domes removed, Figs 3 and 4, plan views of the inner and outer
domes respectively (both being constructed in substantially the ordinary manner);
Fig 5, a plan of Fig 1, with the inner and outer domes in position; and Fig 6
shows a modification of the improved burner
In carrying out my Invention I make the wick tube & of a curved form, as
shown in Figs 2, 5 and 6, with the convexity or backs of the said curved wick
tubes a towards each other, and around these wick tubes I arrange a metal screen
or partition b, preferably perforated, and so as to surround and also separate the
wick tubes, as shown at c, Figs 1 and 2, or this metal screen may be made of any
other desuable forin, as seen, for instance, Fig 6 with midfeather c¹ to separate the
wick tubes, the advantage of this airangement being the securing to each wick its
own proper air curent
The line d (Figs 1, 2 and 5) indicates the outer edge of the "gallery," and e tho
iim upon which the inner dome f is placed previous to the outer dome g being fixed
in position
The other parts of the burner not before referred to, such as the gripping
racks with then spindles and buttons for raising and lowering the wicks, and also
the means of attachment to the lamp on oil reservoir are similar to those in ordinary
use and need no description
It will be observed by referring to Fig 5, where the inner and the outer domes f
and g are in position that the curvature of their slots x, x³, in in an opposite
direction to on the reverse of the curvature of the wick tubes a, and that the ends
or inferior points of the latter are directly underneath or in line with the concave
edges of the slots in the inner dome, the apices of the curved wick tubes a being
also in a similar relative position to the apices of the inner edges of the said slots.
Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be used or carried into

page_text: effect, I would observe in conclusion that what I consider to be novel and
original, and therefore claim as the Invention secured to me by the herein-before
in part recited Letters Patent,-
Fust In lamp burners, the construction and use of curved slots in the inner and
outer domes in combination with wick tubes curved in a reverse direction' to the
said slots, substantially as and for the purpose herein-before described and illustrated
on the accompanying Drawing.
Second The combination with the wick tubes of separating, perforated (or other)
metal screens, substantially as and for the purpose herein-before described and
illustrated on the accompanying Drawing.
In witness whereof, I, the said Thomas Rowatt, junior, have hereunto set my
hand and seal, this Eighth day of August, in the year of our Lord One
thousand eight hundied and seventy-seven.