Improvements in or relating to Mantles for use in Incandescent Gas Lighting.
Year: 1897

page_text: Date of Application, 29th Sept., 1897
Complete Specification Left, 29th June, 1898-Accepted, 27th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Mantles for use in Incandescent
Gas Lighting.
I, ALFRED FRANCIS BILDERBECK GOMESS, of 33, Drayton Gardens, South
Kensington, in the County of London, Chemist, do hereby declare the nature
of this invention to be as follows:-
A great defect in mantles used in incandescent gas lighting as at present
manufactured is that they are very liable to become fractured in transport.
This invention is designed in order to overcome the above defect and consists
in coating the mantle with a protective covering so that it may not be brittle,
as is at present the case.
According to one way of carrying out this invention, after the mantle has
been prepared for rendering it incandescent, I coat the fabric with a resinous
gum, such as shellac, for instance, or I may use a solution of gutta percha or
india rubber, or similar gums, and over this coating I may apply collodion if
found necessary.
If it is desired to treat finished mantles, i.e., after they have been stiffened
as at present, I should apply the aforesaid coating over the collodion.
For stiffening the mantles I may use starch, with or without nitre or other
suitable substance for making same inflammable, instead of collodion.
Dated this Twenty-ninth day of September 1897.
BROWNE & Co.,
Agents, 9, Warwick Court, Gray's Inn.
Improvements in or relating to Mantles for use in Incandescent
Gas Lighting.
I, ALFRED FRANCIS BILDERBECK GOMESS, of 33, Drayton Gardens, South
Kensington, in the County of London, Chemist, do hereby declare the nature
of this invention and in what manner the same is to be performed to be par-
ticularly described and ascertained in and by the following statement:-
A great defect in mantles for use in incandescent gas lighting is that they
are very liable to become fractured in transport. This is owing to the fact that
such mantles are usually coated with a protective covering of collodion, which
produces a somewhat brittle, rather flexible, non-elastic coating, and it is a
matter of every day experience that mantles thus coated are extremely liable
to be fractured during transport, especially when subjected to sudden or violent

page_text: shocks, which is attributable to the fact that the coating, being somewhat brittle,
easily fractures, thus displacing the ash underneath to such an extent that,
although the fracture is not always great enough to be obvious on inspection,
when the coating is burnt off the ash falls to pieces.
This invention is designed to overcome the above defect, and consists in coat-
ing a mantle with a protective covering so that it may not be brittle as is at
present the case.
According to one way of carrying out this invention, after the mantle has been
prepared for rendering it incandescent, I coat the frabric of ash with a weak
solution of gutta percha, india rubber or similar gums, and over this coating I
find it necessary to apply collodion.
According to the second way of carrying out this invention, which I prefer,
I treat the finished mantle (i.c. after it has been stiffened as at present) by ap-
plying the aforesaid coating over the collodion.
I find in practice that the most convenient way of applying the rubber or
like coatings is to immerse the mantle in the required solution and then dry it,
repeating the operation, if necessary, until it is found that a sufficiently thick
coating has been formed.
I have found by experiment that the use of a flexible elastic coating (i.e., rubber
or the like), in combination with a flexible, non-elastic coating (i.e. collodion)
is most advantageous as it affords the greatest protection to the ash.
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 I am
aware that in a Patent granted to Oliver Imray, No. 11195, dated 16th August
1887, it is proposed to coat mantles with a solution of caoutchouc or with collodion,
and I therefore lay no claim to either of those coatings separately, but what I
claim is:
-
In incandescent mantles, the use of gutta percha, india rubber or similar gums,
in combination with collodion, for the purpose set forth.
Doted this Twanty ninth day of Luna 1000
BROWNE & Co.,
9, Warwick Court, Gray's Inn, London, W.C.,
Agents for the Applicant.