Improved Manufacture of Incandescence Bodies for Illuminating Purposes.
Year: 1897

page_text: PRUVIDIONAL SPECIFICATION.
Improved Manufacture of Incandescence Bodies for Illuminating
Purposes.
A communication from the Firm CHEMISCHE FABRIK VON MAX JASPER, of
Jaspersweg 1-10, Bernau, near Berlin, in the Empire of Germany.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a new manufacture of very durable incandescence
bodies such as incandescence mantles and it is characterised by the impregnation
of any kind of incandescence bodies in either a burnt (or ashed) or unburnt
condition with alcoholic and volatile solutions. or mixtures of such organic sili-
cium compounds which, when burned, form a residue of silicic acid (dioxide of
silicon) and produce thus, in a purely chemical way, a strong skeleton containing
as a main substance silicic acid.
This impregnation may be carried out with the burnt or unburnt incandescence
body, it is only necessary that it is ignited immediately after the impregnation,
that is to say in a wet condition and exposed to glowing heat. The silicic acid
set free by the burning of the organic silicium compounds adherent to the incan-
descence bodies, combines, in the glowing heat, with one or more constituents
of the ash so as to form an elastic and very resisting material. The impregnation
of already burnt incandescence bodies may be carried out several times so that
finally a completely hard ash-skeleton is formed, but a single impregnation or
incorporation of the silicic acid has been found in practice completely sufficient,
even when the incandescence body applied to the burner was exposed to great
draughts and shaking.
As regards the silicium compounds adapted for the impregnation process it
must be pointed out that all organic silicium compounds, may be used (particu-
.larly esters and alkyles), which are combustible and form, in burning, dioxide of
silicium. For practical and economical reasons silicium alkyles are, on account
of their, for the most part, complicated and expensive manufacture, not so suit-
able as silicium esters, which I produce by the action of chloroform of silicium
(Si H Cl) on alcohol, and also by treating alcohols (methyl, ethyl, amyl, etc.)
with chloride of silicium (Si C₁₁).
For instance, the treatment of an incandescence body, already burnt, which
has proved particularly successful, may be carried out as follows:-
The ordinary incandescence body is burnt out in the usual way, then somewhat
shaped by means of compressed gas, and forms thus the known very fragile burnt
incandescence body. This body is then suspended on a hook and entirely dipped
017

page_text: into a vessel containing a mixture say, of amylic ether or silicium with amyl-
alcohol, after a short space of time the body is withdrawn ignited at once, and
subjected to a glowing heat. The impregnation is carried out exactly in the
same manner with the other organic silicium compounds in question.
Owing to the entire moistening or impregnation above described of the incan-
descence body with the silicium compound the silicic acid produced by burning
is uniformly distributed through the whole body and by a short but strong
glowing heat the new durable body is produced.
Dated this 20th day of December 1897.
BOULT & WADE,
Agents for the Applicant.
Improved Manufacture of Incandescence Bodies for Illuminating
Purposes.
A communication from the Firm CHEMISCHE FABRIK VON MAX JASPER, of
Jaspersweg 1-10, Bernau, near Berlin, in the Empire of Germany..
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, 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 incandescence bodies for illuminating purposes, and
has for its object to render existing or other bodies of this nature sufficiently
durable to withstand any vibrations to which the burner may be exposed.
The incandescence body is impregnated with a solution containing an alcoholic
and an ether organic compound of silicon, which when burnt forms silicon
dioxide on the body.
The body to be treated may have been specially manufactured for the pur-
pose, or may be an existing body such for example as a woven mantle, which may
be treated either in its new or unburnt condition, or after is has been burnt,
when it consists solely of the incandescing ash.
The process consists in immersing the body to be treated into the silicon solu-
tion, which may be made up for example of 15 parts per cent. of
silicic-amyl-ether with 85 parts per cent. of amyl-alcohol. On removal
from the solution the body is ignited while still wet and maintained
at a red heat. The silicic acid thus liberated by the burning of the organic
silicon compound adheres to the incandescence body, combining when subjected
to heat with the constituent parts of the body.
The body may be subjected to more than one immersion in the solution, but
a single dipping is usually sufficient.
Any organic silicon compounds which are combustible and when burnt form
silicon dioxide, may be employed for the impregnating solution, but compounds
with esters and alkyls are preferable.
Alkyls of silicon are however less suitable than silicic-esters produced by the
action of silico-chloroform (Si H Cl) on alcohols or by the treatment of methyl,
ethyl, amyl, or other similar alcohols with silicon chloride (Si C₁₁).
It must be understood that the composition of the impregnating solution may
be varied in accordance with requirements.

page_text: Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondent and in what
manner the same is to be performed, I declare that what I claim is:
1. An incandescence body impregnated with a solution containing an alcoholic
and an ether organic compound of silicon, which when burnt forms silicon dioxide
on the body.
2. A solution composed of silicic-amyl-ether and amyl-alcohol in about the
proportions stated for the purpose of impregnating incandescence bodies.
3. Immersing an incandescence body either in a burnt or unburnt condition
in a solution containing an alcoholic and an ether organic compound of silicon,
and subjecting the body after immersion to heat so as to form silicon dioxide
for the purpose described.
A
The durable incandescence body substantially as described.