Year: 1889

page_text: We, THOMAS FLETCHER and ALFRED CLARE, both of Thynne Street Warrington in
the County of Lancaster, Manufacturers of gas apparatus, 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 cooking vessels constructed of sheet metal.
At present the top edges of such vessels are strengthened by means of wire or the
body of the vessel is made of a sufficient weight and thickness to enable the wire to be
dispensed with. The objects of these Improvements are to enable a cooking utensil to
be constructed with a flat strengthened edge at a less cost than at present, and to
permit a reduction of the weight as compared with similar vessels constructed in the
usual known manners; to retain an equally good appearance and equal strength
where the strength is required, thus obviating the necessity of making the whole body
of the vessel the same thickness as the edge, as is the custom under the present system
of manufacture. Our Invention is more particularly adapted for the construction of
the vessels from sheet copper, but it may also be carried into effect with other sheet
metals which are usually employed in their construction.
Our Improvements consist in folding the edge of the sheet which is to form the top
edge of the vessel so as to form two or more thicknesses of metal along the edge; in
rolling the folding folded edge so as to flatten or consolidate the folds, and in con-
structing the vessel from the folded and rolled sheet in the usual manner, but so that
the folded edge of the sheet forms the top edge of the vessel.
We will more particularly describe our Invention with reference to the accom-
panying drawings in which Fig. 1 represents a sheet of metal having its edge once
folded, and Fig. 2 a similar sheet having its edge twice folded for the purpose of this
Invention. Fig. 3 is a vertical section of a cooking utensil constructed according to
these Improvements.
In each of the Figures, A is a sheet of metal in which the cooking utensil is or is to
be constructed, and B is the folded or rolled edge of the sheet and of the utensil.
The edge of the sheet is folded as represented in Fig. 1 so as to-form two thick-
nesses of metal at the edge or it may be folded in such a manner as to form three

page_text: thicknesses as in Fig. 2; if desired however the edge of the sheet may be folded in a
similar manner so as to form four or more thicknesses in the case of large utensils.
This folding of the edge is effected by the usual means whilst the sheet is in the flat
state and the folded part is afterwards rolled so as to flatten the folds as shown in
Figs. 1 and 2. The sheet is employed in the usual manner in the construction of the
utensil, but so that the folded edge of the sheet forms the top edge of the vessel as
represented in Fig. 3.
In copper utensils which are tinned inside, this improved construction permits the
production of a bright tinned margin at the top edge as is usual in the ordinary
copper cooking utensils of the best construction and quality, but the considerable and
unnecessary weight of such vessels, which is a serious objection to the present system
of construction is very greatly reduced.
In all other respects than those herein before described, the vessel is constructed in
the usual known inethods.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same. is to be performed, we declare that what
we claim is :-
:-
Cooking utensils having their top edges. constructed substantially as hereinbefore
described and as illustrated by the accompanying drawings.
Dated this 15th day of February A.D. 1889.
WILLIAM E. HEYS,
Agent for the Applicants.