Improvements in the Oval Lids of Kettles, Tea Pots, and other such articles, and in the Mode of and Means for Manufacturing. the same.
Year: 1893

page_text: Date of Application, 10th Apr., 1893-Accepted, 2nd June, 1893
COMPLETE SPECIFICATION.
Improvements in the Oval Lids of Kettles, Tea Pots, and other
such articles, and in the Mode of and Means for Manufacturing.
the same.
1, THOMAS BUTLER of the firm of Thomas Butler & Sons of 192 Aston Road
Birmingham in the County of Warwick Tin Plate Workers.do hereby déclare the
nature of 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 has for its object improvements in the oval lids of kettles tea pots
and other such articles and in the mode of and means for manufacturing the same.
by which I obtain a lid of improved shape and appearance while by my improve-
ments the rim of the lid is formed of equal width and regularity all around the oval
the difficulty hitherto having been to obtain this as in forming the rim in oval lids
the ends owing to the difference in the curve having been narrower than the sides
which had a much smaller curve.
In the alteration of the shape of the oval the lid is by my improved means
elongated in proportion to its width and is therefore not a true oval but is of a
shape more suited to the requirements of the articles for which they are used besides
being of improved appearance.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto a double sized sheet of drawings upon which
I have fully illustrated the nature of my said improvements and the manner of
carrying the same into effect.
Figure 1, is an elevation of the top side of one of my oval lids when finished.
Figure 2, is a vertical section of Figure 1.
Figure 3, is a longitudinal vertical section through the tools showing them in
position prior to the operation of pressing the rim.
Figure 4, is a cross section through the tools showing them in position when
pressing them in the rim.
Figure 5, is a diagram elevation of the chuck upon which the tools are made for
forming the lids.
Figure 6, is a side elevation of Figure 5.
In the manufacture of round lids the rim has been pressed between an upper and
lower tool the lower one being recessed for the flange of the lid to enter but in the
case of oval lids this mode leaves the lid with a narrow rim at the ends where the
acute curve occurs while the rim is wider upon the sides where the curve is less acute
and thus the rim is most irregular. My invention obviates this objection in the
case of oval lids and I will therefore proceed to describe the mode of manufacturing
the same.
The blanks A are first spun with the curved rim a¹ around their edge and the
lower die in which the rim is pressed is provided with the sliding centre B which
projects sufficiently for the blank A to be placed upon it as shown at Figure 3.
The top die E is then brought down and the flange a enters the recess d' which is
left between the movable centre B and the die D the centre being forced down
with the blank A, until the flange a³ is in the recess d' where it is securely retained
while the rim a¹ is pressed between the top die E and bottom die D as seen at
Figure 4. The centre B is kept up in its normal position by the springs &¹ and b².
In this manner the flange a² is retained tightly in position all round the oval while
the rim a¹ is pressed and thus the rim a' is kept perfectly regular in width and
thickness. In forming the tools for the regular oval a circular collar has been
mounted eccentrically on the head of the lathe for operating the slide on the chuck
but for the purpose of obtaining the oval similar to that shown by Figure 1 the

page_text: collar F which operates the slide N upon which the tool M to be formed is
mounted, is provided with the three cam swells f¹ and three depressions f* so that
as the chuck revolves the slide N is operated by the cam F through the studs n'
which are formed on the slide the whole being combined in a manner (which
produces an elongated oval similar to that shown by Figure 1.
"Having now particularly described & ascertained the nature of my said improve-
ments and in what manner the same is to be performed I declare that what I
claim is
1st. In oval lids of kettles tea pots and other such articles and in the mode of
and means for manufacturing the same the die D with sliding centre B substantially
such as & for the purpose herein set forth and shown upon the accompanying
drawings.
.
2nd. In oval lids of kettles, tea pots, and other such articles and in the mode
of and means for manufacturing the same, the collar F having the swells f¹ and
depressions ƒ³ substantially as and for the purpose herein set forth and shown.
Dated this 8th day of April 1893.
GEORGE BARKER, .
77, Colmore Row, Birmingham.