Year: 1887

page_text: Date of Application, 12th May, 1887
Complete Left, 28th Nov., 1887
Complete Accepted, 20th Jan., 1888
I THOMAS ROBERTS of 112 Victoria Street Westminster Stove Manufacturer do
hereby declare my invention to be as follows:-
This invention relates to an improvement in Stoves constructed of Terra Cotta
either in solid or granulated form contained between two concentric cylinders of sheet
iron or other metal the outer cylinder being perforated to permit direct radiation of
heat from the Terra Cotta and known in the trade as "Roberts's Patent Portable
Terra Cotta Stoves."
Now it has been found in practice that when the simple directions for use of these
stoves are not attended to and a stove is carelessly allowed to become considerably
overheated by reason of excessive draught the inner or lining cylinder of the stove
expands and bulges inwards, so as to render the insertion of the fire-box difficult,
because the Terra Cotta in its loose or granulated form follows the iron and filling up
the space
made by the bulging of the expanding iron, prevents it from contracting to
its original shape.
This invention is designed to obviate the above objection by an internal structural
improvement and this I propose to effect by keeping the Terra Cotta in position by
means of a cylinder of wire work or of thin metal, perforated or otherwise suitably
fitted between the lining cylinder and the Terra Cotta aforesaid and thus allowing
the former after expansion, to contract and return to its proper shape and position.
By means of this invention such control is obtained of the effects of expansion and
contraction that the stove is practically prevented from becoming in any way injuriously
distorted and its long continued use without repair is assured.
BROWNE & Co.,
Agents for the Applicant.

page_text: An Improvement in Roberts' Patent Portable Terra-cotta Stoves.
I, THOMAS ROBERTS of 112 Victoria Street, Westminster, Stove Manufacturer,
do hereby declare my said 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 an improvement in Stoves constructed of terra-cotta either
in solid or granulated form contained between two concentric cylinders of sheet iron
or other metal the outer cylinder being perforated to permit direct radiation of heat
from the terra-cotta and known in the trade as "Roberts's Patent portable terra-cotta
stoves."
Now it has been found in practice that when the simple directions for use of these
stoves are not attended to and a stove is carelessly allowed to become considerably
overheated by reason of excessive draught the inner or lining cylinder of the stove
expands and bulges inwards so as to render the insertion of the fire box difficult
because the terra cotta in its loose or granulated form follows the iron and filling up
the
space made by the bulging of the expanding iron, prevents it from contracting to
its original shape.
This invention is designed to obviate the above objection by an internal structural
improvement and this I propose to effect by keeping the terra cotta in position by
means of a cylinder of wire work or of thin metal perforated or otherwise suitably
fitted between the lining cylinder and the terra-cotta aforesaid and thus allowing the
former after expansion to contract and return to its proper shape and position. By
means of this invention such control is obtained of the effects of expansion and
contraction that the stove is practically prevented from becoming in any way
injuriously distorted and its long continued use without repair is assured.
And in order that my said invention may be fully understood I will now describe
the same with reference to the accompanying sheet of drawings which shews view
(partly in section) of a portable stove with my improvement adapted thereto, the
outer casing of iron and also the terra cotta being partly removed, in order to show
the cylinder of wire work A for keeping the terra cotta in position in the event of the
inner casing "bulging" as aforesaid. Although I have described the cylinder A as
being made of wire work 1 do not wish to limit myself to this as it may be formed of
thin perforated metal for example.
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 :-
In portable terra cotta stoves the additional cylinder marked A substantially as
and for the purposes set forth.