An Improved Method of Mounting Incandescence Mantles on Gas Burners.
Year: 1896

page_text: Date of Application, 22nd Sept., 1896-Accepted, 7th Nov.. 1895
[Communicated from abroad by WILHELM HEINRICH AUGUST SIEVERTS, of
Hamburg, in the Empire of Germany.]
An Improved Method of Mounting Incandescence Mantles on
Gas Burners.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co. Patent.
Agents, 45 Southampton Buildings, in the County of Middlesex, 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:-
This invention relates to a method of firmly fixing incandescence mantles to the
burners of incandescence gas lamps, the fixing being effected in such a manner
that the lower part of each incandescence mantle is intimately connected with the
head of the burner, and the top part of the mantle is likewise securely fixed to a
suitable head on the frame supporting the incandescence body. This fixing is
effected by exposing the incandescence mantle to the action of a jet flame, acting
from the exterior inward, at the burner and head, whereby these parts of the
mantle are forced inward, until they contract into intimate contact with the burner
parts referred to. The incandescent mantle thus treated under certain conditions.
has a frilled appearance. This defect is due to the fact that the material used for
making the incandescence mantles becomes soft aud plastic when subjected to the
action of a jet flame.
If the head of the frame supporting the incandescent body be made of suitable
material, the said head can even be fused together with the top part of the incan-
descence mantle by means of this improved method. Otherwise a special cement
may be employed for uniting the parts.
The accompanying drawing represents an incandescence mantle applied to the
burner by means of the above method.
The incandescence mantle, forced inward by a radially directed jet flame,
contracts at its lower part a into intimate contact with the outer surface of the
burner head while its top part a2 is contracted into intimate contact with a
suitably shaped (approximately conical or segment-shaped) solid or hollow head c
on the frame d for supporting the incandescence body, which head may be of any
suitable material. The jet flame employed may be an annular flame, which in
this case may simultaneously act upon the whole circumference of the mantle-
extremity.
This improved method also entirely obviates the laxity usually observed in
incandescence mantles suspended above the burner, this laxity being the cause of
the mantle becoming rapidly worn and unfit for adjustment on the lamp or burner,
so that incandescence bodies applied to the burner according to this improved
method will even stand rough handling without injury.
This improved method further ensures that the incandescence mantle lies
exactly in the peripheral surface of the flame arising from the burner, whereby
the lighting power of the mantle is raised to its highest efficiency. The
application of this improved method is, of course, not restricted in all cases to the
foot a as well as to the top a² of the incandescence mantle, but may, according to
practical requirements, be sometimes applied to the foot of the mantle only, and
sometimes to the top only.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
An improved method of attaching incandescence mantles to their burners, its
characteristic feature being that the lower part such as a of such an incandescence
mantle is intimately contracted upon, (and may be fused with) the head such as b
of the lamp burner and that the top part such as a² of the mantle is likewise
brought in intimate contact with a head such as c attached to the frame such as d
supporting the incandescence mantle, the contact between the incandescence
mantle and the surfaces being obtained by exposing the said mantle at the
extremity to be contracted to the action of a jet flame passing from outside toward
the inside, whereby the mantle is softened and forced against the burner or head
referred to.
Dated thie 22nd day of Santamber 1896
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.