Improvements in the Manufacture of Parts of Knobs, Terminal Ornaments, and Kindred Articles.
Year: 1897

page_text: Improvements in the Manufacture of Parts of Knobs, Terminal
Ornaments, and Kindred Articles.
We, JOEL CADBURY and FRED WALKER LAMBERT, trading as Green, Cadbury:
and Company, of Great Hampton Street, in the City of Birmingham, Manufacturers,
and JOHN THOMAS AUSTIN, of Great Hampton Street, Birmingham aforesaid,
Stamper and Piercer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the manufacture of the pummels, foot ends, necks or
caps of door and other knobs, terminal ornaments, mounts, spindles, and other
analogous articles made from sheet metal, and has for its object the production
of a thickened bottom end or part of sufficient substance to take the screwing or
worming or to form a bearing hole for the end of a spindle or peg to which the
knob or the like is connected, to pass through.
In carrying out our invention, we take a blank of sheet metal, of the same
thickness as the bottom of the finished foot is to have and by dies and pressure
and in one or more processes, we form the same into a shallow cup of the same,
or nearly the same diameter as the said foot is required to have when completed.
By a series of drawing through or like process, the walls of the cup are elongated
and thinned by each successive operation, but the diameter of the bottom is left
When
unchanged and the original thickness of the bottom is preserved intact.
the walls have been sufficiently elongated, this thick bottom is pierced with a
central hole, which is either round and internally threaded or wormed to take a
screwed peg or stalk, as in the case of a bedstead or like terminal or mount, or it
may be square sectioned to take a like sectioned spindle in the case of a door or
analogous knob.
When an extended bearing for the stalk or spindle is required then a small
central hole is made in the middle of the bottom. which is afterwards enlarged and
extended inward into a sleeve of the required size, by a punch or driven in tool,
and the inside bore is then bored or squared up, as required.
After the bottom is pierced, the side walls of the elongated cup are gathered
in or contracted at the middle or other part to form the neck, to the open top end
of which the body of the knob or mount is subsequently attached by any suitable
means.

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Parts of Knobs, Terminal
Ornaments, and Kindred Articles.
We, JOEL CADBURY and FRED WALKER LAMBERT, trading as Green, Cadbury
and Company, of Great Hampton Street, in the City of Birmingham, Manufacturers,
and JOHN THOMAS AUSTIN, of Great Hampton Street, Birmingham aforesaid,
Stamper and Piercer, 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 the pummels, foot ends, necks or
caps of door and other knobs, terminal ornaments, mounts, spindles, and other
analogous articles made from sheet metal, and has for its object the production
of a knob or the like having a thickened bottom end or part of sufficient sub-
stance to take the screwing or worming or to form a bearing hole for the end of
a spindle or peg (to which the knob or the like is connected) to pass through.
In carrying out one form of our invention, we take a blank of sheet metal,
such as represented in edge view in Figure 1 and plan in Figure 2, and marked a,
of the same thickness as the bottom of the finished foot is to have and by dies
and pressure and in one or more processes, we form the same into a shallow cup
of the same, or nearly the same diameter as that which the lower end of the said
foot is required to have when completed. By a series of drawing through or like
process, the walls of the cup are elongated and thinned by each successive opera-
tion, but the diameter of the bottom is left unchanged and the original thickness
of the bottom is preserved intact. At this stage the cup blank is as represented in
section in Figure 3 and marked b.
When the walls have been sufficiently elongated, this thick bottom is pierced
with a central hole, marked b', in Figure 3, which hole is subsequently enlarged
and the surrounding metal extended inwards formed into an inwardly directed
sleeve or extended bearing (marked in the section of this stage of the blank
represented in Figure 5) to receive the peg to which the knob is to be connected.
By subsequent drawings through, spinnings or other operations, the bottom of
the neck may be dished and the side walls gathered in or contracted to give them
their finished form. Figure 6 being a vertical section of the said neck at this
stage, finally the inside of the elongated hearing hole is screw-threaded as repre-
sented in the vertical section Figure 7 and the neck is completed as represented
in the elevation Figure 8, ready for its attachment to the head of the knob,
mount or the like.
Figure represents a topside plan and a vertical section of another form of
neck embodying our improvements. In this arrangement the sleeve or extended
and inside screwed bush is dispensed with, and the metal at the bottom is left
of such a thickness that the walls of the screwed hole b, are of sufficient depth
to provide the necessary bearing for the peg or attachment spindle.
In the case of a neck requiring to be fitted to a square or angular sectioned
spindle, as in the case of a door knob, then the sleeve or hole formed out of or
within the thickened bottom of the neck may be made of a corresponding shape.
Figure 10 represents a vertical section of such a neck and Figure 11 is a cross
section thereof upon the dotted line, shewing the squared sleeve b, through
which the knob spindle takes, in plan.

page_text: 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
First: Making the foot or pummel of a knob, mount or the like from a blank,
or a cupped blank of metal having a thickened part. bottom or base, which admits
of being formed with an extended screwing or bearing hole, substantially as and
for the purpose described and set forth.
Secondly: Making the foot or pummel of a knob, mount or the like from a
blank, or a cupped blank, of metal having a thickened part bottom or base and
forming integrally from the said thickened part, an extension or sleeve which
admits of the formation of a long screwed or extended bearing, substantially as
and for the purpose described and set forth.
JOEL CADBURY,
FRED WALKER LAMBERT,
JOHN THOMAS AUSTIN,
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicants.