Improvements in the Manufacture of Sheet Metal Knobs, Vases, Terminals, Ornaments, and other kindred articles.
Year: 1897

page_text: Date of Application, 14th Oct., 1897
Complete Specification Left, 2nd July, 1898-Accepted, 6th Aug.,
1898
Improvements in the Manufacture of Sheet Metal Knobs, Vases,
Terminals, Ornaments, and other kindred articles.
I, THOMAS SMITH, of No. 111, Lombard Street, in the City of Birmingham,
Works Manager, do hereby declare the nature of this invention to be as follows:-
This invention relates to the manufacture of sheet metal knobs, vases, terminals,
finals, spindles, feet, ornaments and other articles of a kindred nature and has
for its object, to simplify the process of manufacture and to reduce the cost of
production..
The invention principally has reference to the neck or foot part of such articles,
and in carrying out the improvements in connection with the manufacture of a
sheet metal knob, I take a spherical shell, head or body part, and a sheet metal
neck or foot part, which latter part is made and united to the shell body part in
manner following:-
I take a blank of sheet metal and raise the same into a hat-shaped cup, the
closed bottom of which is pierced with a hole suitable for the passage therethrough
of a spindle. The open or mouth end, which is considerably enlarged compared
to the other end, is operated upon by a series of gathering-in processes, the first
of which make an annular groove or sinking near the edge, the extreme edge being
set back a little from the line from the intact part of the enlargement, which is
by this process, formed into an annular beading. The walls of the cup at the
mouth end are thus fashioned first into an inwardly sunken channel, with a hollow
and annular enlargement or beading coming between it and the narrower part of
the neck. The top of the beading (or the bottom of the adjacent channel) is
then vertically sunken and subsequently flattened into an annular flange, with a
circumferential channel coming between said flange or beading and the back lip
or flange at the mouth, the said channel or undercut being curved or inclined
inwards to an arc struck from a point in the axis of the shell or spherical body.
The grooved and double walled edge of the foot is alike to the shape generally
produced by a turning process in ordinary cast metal neck.
The spherical shell has an open bottom of such a size that its edge will pass
just onto the outer edge of the lip, which is located inwards of and is raised higher
than the edge of the beading. By now applying downward pressure upon the
walls of the lower part of the spherical shell the metal is distended and the edges
are forced into the undercut annular groove, hence the uniting of the one part to
the other, the pummel having been previously inserted in the neck and is there
retained by contracting or gathering in the neck above the said pummel which
has a screwed hole in its middle as usual.
I propose that the pummel should be of the same figure as the inside of the
lower end of the neck and should be sunken on the middle of its underside with
octagonal or like edgings, whilst the sloping sides and adjacent parts are toothed,
serrated or roughened, into which the metal of the base and parts of the sides of

page_text: the neck are embedded or made to follow the contour of the edgings in order to
affix the pummel in its assigned position and prevent the same from rotating.
The processes described are either performed by closing tools, or by spinning,
or partially by stamping and partially by dies and pressure.
The application of my invention to vases, terminals, spindles, feet, ornaments
and like articles having either single or double necks differs in no essential respect
from its application to the manufacture of sheet metal knobs as herein described.
Dated this 13th day of October 1897
Improvements in the Manufacture of Sheet Metal Knobs, Vases,
Terminals, Ornaments, and other kindred articles.
I, THOMAS SMITH, of No.. 111, Lombard Street, in the City of Birmingham,
Works Manager, 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 the manufacture of sheet metal knobs, vases, terminals,
finals, spindles, feet, ornaments and other articles of a kindred mature and has
for its object, to simplify the process of manufacture and to reduce the cost of
production.
The invention principally has reference to the neck part of such articles, and
to the securing of the same to the head or body part, and in carrying out the
improvements in connection with the manufacture of a sheet metal knob, I take
a spherical shell, head or body part, and a sheet metal neck or foot part, which
latter part is united to the shell body part in manner as hereinafter described and
represented in the accompanying drawings, in which
Figure 1 represents an elevation of a two-part knob in which the shell or
globular body is connected to the neck, and the neck produced in accordance with
my invention.
Figure 2 is a sectional view representing the said connection and the construc-
tion of the neck.
Figures 3, 4,
and 6 are sections of different cupped blanks representing the
successive stages, in the production of the neck from sheet metal.
Figure 7 is a topside plan of the blank Figure 5.
Figure 8 is a topside plan of the blank Figure 6.
Figure 9 represents the head and neck parts of the knob separately.
Figure 10 represents an elevation, a cross section, a topside plan and an under-
side plan of the solid metal pummel which is enclosed within the foot of the neck.
The same letters of reference indicate corresponding parts in the several figures
of the .drawings.
fi
In carrying out the production of the neck, I take a blank of sheet metal and
raise the same into a hat-shaped cup represented in Figure 3 and marked a, the
closed bottom a¹, of which may, either at this stage, or subsequently, be pierced
with a hole suitable for the passage therethrough of a spindle. The open or mouth
end. a², which is considerably enlarged or increased in diameter compared to the
other end, is operated upon by a series of spinning or gathering-in processes, and
partly contracted or gathered in at a³, as represented in Figure 4, and then an
annular groove or sinking a³, 1S formed near the edge, as répre-
1

page_text: sented in Figure 5, with the extreme edge a³, being set back a little
from the line of the intact part of the enlargement (marked a6, in Figures 5 and 7)
which is by this process, formed into an annular rib or beading. The walls of the
cup at the mouth end are thus fashioned first into an inwardly sunken channel a¹,
with an annular enlargement or beading a, coming between it and the narrower
lower part a', of the neck and being surrounded by an annular upright flange a8,
which is subsequently expanded and turned over as represented in Figure 6 so as
to produce a circumferential under cut seating or channel a³, coming between
the said beading a, and the back lip or turned over flange at the mouth, the said
channel or under-cut being inclined inwards at an angle which is suitable to
receive the wall parts of the shell body surrounding the open mouth thereof.
The grooved and double walled edge of the neck is alike to the shape generally
produced by a turning process in ordinary cast metal neck.
The spherical shell 6, has an open bottom b', of such a size that its edge will
pass just onto the outer edge of the lip, which is located inwards of and is
raised higher than the edge of the beading a. By now bringing the parts together
and applying pressure in the direction of the axis of the knob, the metal at the
edges of the knob is forced and thereby gathered into the undercut seating or
annular groove, hence the uniting of the one part to the other by the same process
as usually employed for connecting sheet metal knobs to cast necks..
pummel c, is preferably inserted within the neck previous to the connection of
the latter part to the head, and is there retained by contracting or gathering in
the neck at 10, (see Figures 2 and 9) at a point above the said pummel which
has a screwed hole c', in its middle as usual.
The
I propose that the pummel should be of the same figure as the inside of the
lower end of the neck and should be sunken at c2, on the middle of its under-
side 3, with the sinkings having scolloped or like edgings, into which the metal
of the bottom end of the neck is forced and thereby the pummel is prevented from
rotating within the neck. The sloping sides of the said pummel are toothed,
serrated or roughened at 5, into which the metal of the base and parts of the sides
of the neck are embedded or made to follow the contour of the edging thereby
providing further means of affixing the pummel in its assigned position and
preventing the same from rotating.
The processes described are either performed by closing tools, or by spinning,
or partially by stamping and partially by dies and pressure.
As a modification of my invention, the open end of the knob may be inserted
onto an upright flange such as as, in Figure 5, which flange may then be spun
over within the inside of the knob shell by inserting a hooked tool into the interior
of the knob for this purpose.
The formation of the blank Figure 4 may be effected from a blank of a cupped
or short cylindrical figure by rolling or spinning outwards parts of the metal to
form the annular bulging.
The application of my invention to the connection together of the component
parts of sheet metal to vases, terminals, spindles, feet, ornaments and like articles
having either single or double necks differs in no essential respect from its applica-
tion to the manufacture of sheet metal knobs as herein described.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
First In the sheet metal necks of knobs, vases, terminals, spindles and other
analogous articles, forming the attachment edge or seating for the edges of the
head or body part of the article, by fashioning an annular undercut groove or
channel between an inclined and circumferential lip or beading and a like inclined
flange, substantially in the way herein described and set forth.
Secondly: In the sheet metal necks of knobs and like articles, forming the
attachment edge or connection seating from a blank having an annular bulging,

page_text: such as in Figure 4, the walls of which are closed down so as to form a pair of
inclined flanges, with an undercut channel between them, substantially in the
ways and for the purpose described and set forth.
1000
Dated this 1st day of July 100.
THOMAS SMITH.
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.