IMPROVEMENTS IN MANUFACTURE OF KNOBS SUITABLE FOR USE IN THE LOCKS OF DOORS AND FOR VARIOUS OTHER PURPOSES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
CHARLES PRIESTLAND Tool Maker New John St West Birmingham in the
County of Warwick EDWARD HENRY CASHMORE Die Sinker and Tool maker
No 104 Vyse St Birmingham in the County of Warwick FRED WALTER MOLE
Die Sinker and Tool maker 104 Vyse St Birmingham in the County of Warwick
do hereby declare the nature of our invention for IMPROVEMENTS IN
MANUFACTURE OF KNOBS SUITABLE FOR USE IN THE LOCKS OF DOORS AND FOR
VARIOUS OTHER PURPOSES to be as follows:-
THE
This Invention consists of an improved method of constructing knobs suitable
for use in the locks of doors and for various other purposes, whereby the knob
altho made in two pieces will yet be firm and not liable to turn round as hereunder
further mentioned.
The method now generally adopted for making a metal knob is to make it in
two parts. The neck or portion that fits in the square or other shaped spindle is
usually made of cast metal the elliptical portion being made out of
ductile metal stamped into the desired shape.
plate of
The elliptical portion is usually formed with one part of the complete ellipse
removed or left out thus leaving a circular hole corresponding in dimentions to the
upper face of the cast neck.
The elliptical part is then pressed into a groove provided in the upper face of the
cast neck thus forming the complete knob. The torsion pressure constantly
brought to bear in turning the knob frequently loosens the elliptical portion from
the neck the result being, that a person attempting to open a door by means of a
door-knob fixed to a lock would instead of turning the spindle attached to the knob
merely rotate the elliptical part of the knob round the groove in the cast neck of
the said knob and thus be unable to open the door.
This invention will effectually prevent the elliptical portion of the knob from
getting loose and consists of the following arrangement of parts.
A cast metal neck is made of suitable and convenient form to receive a square
or round spindle at one end and formed into a circular groove at the other end.
In the groove at the upper end of the said neck are provided four or more

page_text: longitudinal openings or slots which may be one fourth of an inch by of an
inch more or less according to the size of the knob.
The elliptical portion is formed in the following manner.
•
A blank is cut out of a plate of metal which viewed on its horizontal plane
presents a perfect circle with four or more angular shaped ears projecting from the
edge of the circle, the blank is then pressed or stamped into the desired elliptical
shape.
The outside circular edge with the projecting ears on it is by the process of
stamping or pressing bent over to form that face which connects with the neck.
Looking at the elliptical portion of the knob on its vertical plane with its
greatest dimentions from left to right, after it has been stamped or pressed to the
required form out of the blank the four or more projecting ears present themselves
to view in a convenient position to enter the beforementioned longitudinal openings
or slots in the upper portion of the neck.
The elliptical portion of the knob is placed over the neck.
The projecting angular shaped ears are introduced into the slots in the neck, the
neck and elliptical part are then pressed close together, the ears pass through and
lock themselves in the slots, the result being that the complete knob is formed in
such a manner that with ordinary wear the two parts are inseperable..

page_text: We CHARLES PRIESTLAND Tool Maker New John St West, Birmingham in the
County of Warwick EDWARD HENRY CASHMORE, Die Sinker and Tool Maker
104 Vyse St, Birmingham in County of Warwick FRED WALTER MOLE Die
Sinker and Tool Maker 104 Vyse St Birmingham in the County of Warwick
do hereby declare the nature of our invention for IMPROVEMENTS IN THE
MANUFACTURE OF KNOBS SUITABLE FOR USE IN THE LOCKS OF DOORS AND FOR
VARIOUS OTHER PURPOSES and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
This invention consists of an improved method of constructing knobs suitable
for use in the locks of doors and for various other purposes whereby the knob altho
made in two pieces will yet be firm and not liable to turn round as hereunder
further mentioned.
The method now generally adopted for making a metal knob is to make it in
two parts.
The neck or portion that fits on the square or other shaped spindle is usually
made of cast metal, the eliptical portion being made out of a plate of ductile metal
stamped into the desired shape.
The eliptical portion is usually formed with one part of the complete elipse
removed or left out thus leaving a circular hole corresponding in dimentions to the
upper face of the cast neck.
The eliptical part is then pressed into a groove provided in the upper face of the,
cast neck, thus forming the complete knob. The torsion pressure constantly.
brought to bear in turning the knob frequently loosens the eliptical portion from
the neck, the result being that a person attempting to open a door by means of a
door knob fixed to a lock, would instead of turning the spindle attached to the
knob, merely rotate the eliptical part of the knob round the groove in the cast neck
of the said knob and thus be unable to open the door.
This invention will effectually prevent the eliptical portion of the knob from
getting loose, and consists of the following arrangement of parts.
A cast metal neck is made of a suitable and convenient form to receive a square
or round spindle at one end and formed into a circular groove at the other end, in
the groove at the upper end of the said neck are provided four or more openings
or slots which may be one fourth of an inch by one sixteenth of an inch more or
less according to the size of the knob.
The eliptical portion is formed in the following manner.
A blank is cut out of a plate of metal which viewed on its horizontal plane
presents a perfect circle, with four or more angular shaped ears projecting from the
edge of the circle, this blank is then pressed or stamped into the desired eliptical
shape.
The outside circular edge with the projecting ears on it is by the process of
stamping or pressing bent over to form that face which connects with the neck.
Looking at the eliptical portion of the knob on its vertical plane (with its
greatest dimentions from left to right) after it has been stamped or pressed to the
required form out of the blank the four or more projecting ears present themselves
to view in a convenient position to enter the beforementioned openings or slots in
the upper portion of the neck.
The eliptical portion of the knob is placed over the neck.
The projecting angular shaped ears are introduced into the slots of the neck, the
neck and eliptical part are then pressed close together. the ears pass through and

page_text: lock themselves in the slots, the result being that the complete knob is formed in
such a manner that with ordinary wear the two parts are inseparable.
I will now proceed to describe with reference to the accompanying drawings the
manner in which my invention is constructed.
Figure 1 Represents the blank cut out of flat metal ready to stamp or otherwise
form into the required shape.
Figure 2 Represents. in section. the flat blank Figure I, stamped, pressed or
otherwise formed into the cup shape indicated.
Figure, 3 Represents the blank Fig 1 still further stamped, pressed, or otherwise
formed into a shape convenient, to connect with the kneck.
¡. Figure 4 Represents a complete knob, the eliptical portion being formed out of
plate Fig 1 either of the necks Fig.6 or Fig 8 being connected thereto.
E'
Fig 5 Represents the blank cut out of flat metal with serrated or scalloped
edges.
'
J.
Figure 6 Represents a vertical elevation of kneck without a groove,
Figure 7 Represents a plan of Fig 6.
Figure 8 Represents a vertical elevation of kneck with a groove.
Figure 9 Represents a plan of Fig 3 viewed in the direction of the arrow.
Figure 10 is a sectional plan of Fig 4 on the line a b.
Figure 11 Représents a complete knob the eliptical portion being formed out of
the plate with scolloped edges.
In carrying out my invention I proceed in the following manner.
I prepare my blanks as illustrated at Fig 1 with any convenient and suitable
number of projecting ears A the blank is then stamped pressed or otherwise formned
into the shape represented in section at Fig 2, the cup shape represented at Fig 2 is
then further manipulated until it takes about the form represented at Fig 3.
I then provide a neck as represented at Figure 8 this neck is by preference made
of cast metal but I can in some cases make it by stamping, pressing, or by any other
convenient method The neck is formed at the bottom part to receive a square
spindle, as represented at C in Fig 6, or to receive a round spindle as represented at D
Fig 10 or it may be made to receive a spindle of any desired shape the upper
portion of the neck is formed into a groove as represented at E.
In this groove are provided slots, equal in number to the ears A provided on the
eliptical part. In some cases I dispense with the groove and leave a projecting
flange as represented at F Figure 6.
The eliptical portion of the knob, that is to say the upper portion represented at
Fig 3 is then placed over the kneck, the ears A are introduced into the slots B, the
neck and eliptical part are then pressed together, the ears A sliding through the
slots B until the edge of eliptical portion rests in the groove E or in the angle G
formed by the juncture of the projecting flange F with the vertical part.
In some cases I prepare my blanks in the manner shewn at Fig 5 with serrated
edges, the blank would go through the shaping process as hereinbefore described in
reference to the blank Fig 1 and when so connected to the neck would present the
appearance represented at Fig 11 the extreme end of teeth or projections resting in
the groove of kneck E or in the angle G.
The slots shewn in plan Fig 7 are represented wider than the root of projections A
I prefer in some cases so to make them to allow for any irregularity in the expansion
or contraction of the metal during the shaping processes shewn at Figures 2. 3. 9.
I wish to call attention to the fact that the slots are shewn dotted through on
plan Fig 7 which of course represents that there is substance over the slots for on
this mainly consists the binding and securing power of the said slots on the ears.
As hereinbefore mentioned in my provisional specification I am fully aware that
the making of knobs with the upper part pressed or stamped and connected to a
grooved kneck is old.
B
What I consider new and original is making the knobs in such a manner that the
kneck and eliptical part are inseperable by any ordinary wear.

page_text: The knobs when made will be suitable for use on bedsteads and for many other
purposes but will be specially and particularly valuable used with door locks.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1st The making of knobs the top part of which are formed with projecting ears
and the bottom part provided with slots to receive the ears the two parts being
pressed together with the ears of the top part passing through the slots of the
bottom part as illustrated and described.
Signed this 7th day of November 1884.
CHARLES PRIESTLAND.
EDWARD HENRY CASHMORE.
FRED WALTER MOLE.
Per Alf. Wm Turner,
Agent.