AN IMPROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF STAMPED METALLIC LIDS OR COVERS FOR SAUCEPANS AND OTHER COOKING VESSELS
Year: 1876

page_text: LETTERS PATENT to Charles Frederick Clark, of the Firm of T. and C. Clark
and Company, of Wolverhampton, in the County of Stafford, Ironfounders,
and John Puralow, of Wolverhampton aforesaid, Cover Maker, in the employ
of the said Firm, for the Invention of "AN IMPROVEMENT OR IMPROVEMENTS
IN THE MANUFACTURE OF STAMPED METALLIC LIDS OR COVERS FOR SAUCEPANS
AND OTHER COOKING VESSELS."
Scaled the 7th November 1876, and dated the 20th May 1876.
PROVISIONAL SPECIFICATION left by the said Charles Frederick Clark and
John Purslow at the Office of the Commissioners of Patents on the 20th May
1876.
CHARLES FREDERICK CLARK, of the Firm of T. and C. Clark and Company, of
Wolverhampton, in the County of Stafford, Ironfounders, and JOHN PURSLOW,
" AN
of Wolverhampton aforesaid, Cover Maker, in the employ of the said Firm.
IMPROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF STAMPED METALLIC
LIDS OR COVERS FOR SAUCEPANS AND OTHER COOKING VESSELS."
Our Invention refers to such metallic lids or covers for saucepans and other
cooking vessels as are composed of two parts, namely, of a dome-shaped top, and
a slightly conical rim fixed to the under side of the said top and near the
circumference thereof, the said two parts being made and connected together by
the stamping and rolling in processes, the top being made from a disc of inetal
and the rim from a ring of metal, the latter being formed without rivetting or
soldering.
The object of our Invention is to produce a rounded or smooth edge to the rim
of the saucepan or other lid instead of the sharp or cutting edge which is common
to rims made of a strip of metal, and to produce in conjunction with the said
rounded or smooth edge a closed beading on the inside of the rim, whereby great
cleanliness is obtained in the lid, inasmuch as dirt cannot accumulate between the
said closed edge or bending and the inside of the rim. We effect this by making
the rim in the ordinary way from a disc of metal, the said rim being made without
rivetting or soldering, but instead of turning the inside edge of the rim slightly
over to form an open flute or gutter we press or bend the said inside edge of the
rim tightly against the inside of the rim. There is thus formed a rounded edge to
[Price Gd.]

page_text: the rim, and on the inner side of the said rounded edge a closed beading, the edge
of the said closed beading being pressed in close contact with the inside of the
rim so that no dirt can enter between the said bending and the rim. Besides
great cleanliness, the use of a closed edge or beading, as described, prevents the
condensed vapours from being deposited in the edge or beading, and as a con-
sequence the metal at the said edge or beading is not corroded.
The turning over and closing processes described are effected by the use of
tools and machines of the kind commonly employed for bending or raising sheet
metal.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Frederick Clark and John Purslow in the Great Seal Patent
Office on the 15th November 1876.
CHARLES FREDERICK CLARK, of the Firm of T. and C. Clark and Company, of
Wolverhampton, in the County of Stafford, Ironfounders, and JOHN PURSLOW, of
Wolverhampton aforesaid, Cover Maker, in the employ of the said Firm.
"AN
IMPROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF STAMPED METALLIC
LIDS OR COVERS FOR SAUCEPANS AND OTHER COOKING VESSELS."
Our Invention relates to such metallic lids or covers for saucepans and other
cooking vessels as are composed of two parts, namely, of a domne-shaded top and a
slightly conical rim fixed to the under side of the said top and near the circumference
thereof, the said two parts being made and connected together by the stamping and
rolling in processes, the top being made from a disc of metal and the riin from a
ring of metal, the latter being formed without rivetting or soldering.
The object of our Invention is to produce a rounded or smooth edge to the rim of
the saucepan or other lid instead of the sharp or cutting edge which is common to
rims made of a strip of metal, and to produce in conjunction with the said rounded
or smooth edge a closed beading on the inside of the rim, whereby great cleanliness
is obtained in the lid inasınucli as dirt cannot accumulate between the said closed
edge or beading and the inside of the rim. We effect this by making the rim in
the ordinary way from a disc of metal, the said rin being made without rivetting
or soldering, but instead of turning the inside edge of the rim slightly over to form
an open flute or gutter we press or bend the said inside edge of the rin tightly
against the inside of the rim. There is thus formed a rounded edge to the rim,
and on the inner side of the said rounded edge a closed beading, the edge of the
said closed bearing being pressed in close contact with the inside of the rim so that
no dirt can enter between the said beading and the rim. Besides great cleanliness,
the use of a closed edge or beading, as described, prevents the condensed vapours from
being deposited in the edge or beading, and as a consequence the metal at the said
edge or beading is not corroded.
Figure 1 of the accompanying Drawing represents in elevation, Figure 2 in section,
and Figure 3 in plan a stamped metallic lid or cover for a saucepan or other cooking
vessel, the rim of the said lid or cover having a rounded or smooth edge and a closed
beading on its inside according to our Invention.
Figure 4 represents in elevation, Figure 5 in section, and Figure 6 in plan, the
stamped, or unsoldered, or unrivetted ring from which the rim of the lid or cover is
made.
In the said Figures 1, 2, and 3, a is the corrugated dome-shaped top stamped
from a disc of metal in the ordinary way, and b is the slightly conical rim of the lid
fixed to the under side of the dome top a and at the circumference thereof by the
doubling or closing of the edge a² of the said dome top a upon the annular flange c
made at the upper edge of the conical ring b, formning the rim as best seen in the
enlarged sectional view of Figure 2, and also in the separate rim or ring represented
in Figures 4, 5, and 6. The doubling or closing of the edge a² of the dome top a

page_text: upon the flange c of the rim is effected in the ordinary manner and by the use of
the ordinary tools. The bottom of the ring b from which the rim is made has an
internal flange d (see Figures 4, 5, and 6) from which internal flange & the rounded
edge marked e and the closed beading of the rim are made, as illustrated in
Figures 1, 2, and 3. The turning over and closing of the flange d to form the
rounded and closed beading are effected by tools and machines of the kind commonly
employed for bending or raising sheet metal.
By an examination of the enlarged view of Figure 2 it will be seen that the
inside edge or flange d (Figures 4, 5, and 6,) of the rim is first turned inwards, to
form the rounded edge e and the edge of the open flute is afterwards pressed or bent
in close contact with the inside of the rim so as to form a closed beading on the
inside of the said rim. We prefer to tin the top a and rim b separately, and after-
wards to fasten them together in the manner described. We also prefer to rivet the
handle g to the top part a before connecting the latter to the rim.
Having now described the nature of our Invention and the manner in which the
same is to be performed, we wish it to be understood that we do not limit ourselves
to the precise details herein described and illustrated, as the same may be varied
without departing from the nature of our Invention. But we claim as our Invention
the improvement or improvements in the manufacture of stamped metallic lids or
covers for saucepans and other cooking vessels herein-before described and illustrated
in the accompanying Drawing, that is to say, making the stamped, or unrivetted, or
unsoldered rims of the said lids or covers with a rounded or smooth edge in con-
junction with a closed heading on the inside of the said rims, substantially as and
for the purposes described and illustrated.
In witness whereof, I, the said Charles Frederick Clark, have hereunto set my
hand and seal, this Tenth day of November, in the year of our Lord One
thousand eight hundred and seventy-six.
Witness,
G. J. HINDE,
Wolverhampton.
CHARLES FREDERICK CLARK. (L.S.)