Improvements in Lock Furniture.
Year: 1890

page_text: Date of Application, 29th Nov., 1890
Complete Specification Left, 29th Aug., 1891-Accepted, 3rd Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Lock Furniture.
We, GEORGE HAYTER CHUBB, Knight of 128 Queen Victoria Street, in the
City of London, Lock and Safe Engineer and Manufacturer, and GEORGE
GASKELL EXTON, of Binfield Road, Clapham, in the County of Surrey, Engineer,
do hereby declare the nature of the said invention to be as follows:-
This invention relates to improvements in the means of securing the knobs
or handles of latches and locks to their spindles, and consists in forming the .
end of the spindle, which enters the knob or handle, in the form of a fork, that
is to say with two branches or prongs, either or both of which may be formed
in one with the spindle itself, or of a separate piece or pieces secured to the
spindle; in either case one or both prongs is or are made more or less elastic,
so that when the two branches or prongs are inserted into the knob or handle
they will tend to spring more or less apart. One or both of the prongs is or
are serrated or toothed transversely on its or their outer surfaces, and the knob
or handle is provided internally with one or more teeth or studs which takes
or take into the serrations or teeth on one or other, or both, of the prongs
when the end of the spindle is pushed into the hole of the knob or handle,
and the latter is thereby held in any desired position on the spindle. Each of
the serrated or toothed parts has a flat formed therein lengthwise of the spindle,
and a hole or holes is or are made in the neck or shank of the knob or handle
coincident with one or both of these flats, so that when it is desired to remove
the knob or handle from the spindle a bradawl or other suitable instrument
can be passed through the said hole or holes and pressed against the said flat
or flats, whereby the prong or prongs is or are forced inwards, releasing the
teeth or serrations on each prong from the corresponding teeth or studs in the
knob or handle; and the latter is then free to be drawn off the spindle.
If preferred, the serrations or teeth may be formed inside the prong or
prongs, which would then take over a pin or other fixed piece in the knob or
handle.
COMPLETE SPECIFICATION.
Improvements in Lock Furniture.
We, GEORGE HAYTER CHUBB, Knight, of 128 Queen Victoria Street, in the
City of London, Lock and Safe Engineer and Manufacturer, and GEORGE
GASKELL EXTON, of Garsdale, Beckenham, in the County of Kent, Engineer, do
hereby declare the nature of the said invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying sheet of drawings
and to the letters and figures marked thereon that is to say -
This invention relates to improvements in the means of securing the knobs or
handles of latches and locks to their spindles, and consists of the following arrange-
ments:-The end of the spindle A (see Figure 1 of the drawings) which enters the
knob or handle B is made in the form of a fork that is to say with two branches or
[Price 8d.1

page_text: prongs A1 A2 either or both of which may be formed in one with the spindle A
itself as shown in Figure 1 or of a separate piece or pieces secured to the spindle,
(as shown for example in Figure 2) in either ease one or both prongs is or are
made more or less elastic so that when the two branches or prongs are inserted into
the knob or handle B they will tend to spring more or less apart. One of the
prongs, A for example, is serrated or toothed transversely on its outer surface as
shown in Figure 1, or both of the prongs A' and A2 are so serrated or toothed as
shown in Figure 2, and the knob or handle B is provided with a tooth or stud C
which engages with the serrations or teeth on the corresponding prong (see
Figures 1, 2 and 7) when the said prongs are pushed into the hole of the knob or.
handle B, and the latter is thereby held in any desired position on the spindle. A.
Each of the serrated or toothed parts has a flat A³ formed therein, see Figure 3
which is a plan, and Figures 4 and 5 which are transverse sections through the
spindle A taken on lines 1-1 of Figures 1 and 2 respectively. The flat A³ is
formed lengthwise of the spindle, and a hole or holes D is or are made in the neck
or shank of the knob or handle B coincident with one or both of these flats, as the
case may be, so that when it is desired to remove the knob or handle B from the
spindle, a bradawl or other suitable instrument E (Figure 1) can be passed through
the said hole or holes and pressed against the said flat or flats whereby the prong
A in Figure 1, or both prongs A' and A' in Figure 2 is or are forced inwards
releasing the teeth or serrations on the prong or prongs from the corresponding
teeth or studs C in the knob or handle B and the latter is then free to be drawn off
the spindle.
If preferred the serrations or teeth may be formed inside one of the prongs, A
for example, as illustrated in Figure 6, in which case the serrations or teeth take
over a pin or other catch-piece C fixed to, or formed in the knob or handle B and
which passes into the space between the two prongs A¹ A2 when the said knob or
handle is passed on to the latter. In this case the prong A¹ opposite to the
prong A2 on which the serrations or teeth are formed may be provided with
a slot F which coincides with the hole D in the handle B so as to permit
of the end of the bradawl or other instrument being passed through the said
hole and slot in order to press the prong A2 aside so as to free its serrations or teeth
from the catch-piece C, and thus allow the handle B to be drawn off the spindle:
It will be understood that a flat is formed lengthwise of the spindle and across the
serrations or teeth in the prong A similar to that shown at A³ in Figures 3, 4 and 5.
for the end of the bradawl or other instrument to bear against and slide on when
the knob or handle B is being drawn off the spindle. Instead of placing the hole D
in the position shown which necessitates the slot F in the prong A¹, the hole D
may be placed as shown at D' so that a tapered instrument passed through the
same will press the prong A2 aside and release the serrations from the catch-piece C.
In this case the above mentioned flat, similar to A³ is not required.
It will be understood that in the arrangement shown in Figure 6 the prongs A¹ A³
should be constructed so as to have a tendency to spring together instead of apart
as in the arrangements shown in Figures 1 to 5.
G is the rose fixed to the door in the usual way. It may be provided with a
tubular projecting part G¹ into which the neck or shank of the knob or handle, B
is fitted so as to turn easily therein, whilst it is guided and steadied thereby in such
manner that it cannot be got off the spindle A by rocking or moving it alternately
up and down or sidewise without employing an instrument such as E introduced
through the hole D to disengage the teeth of the prong from the tooth or catch-
piece C. The tubular part G of this rose is provided with a slot G2 (see Figure.7)
so placed that the hole D in the neck or shank of the knob or handle B can be got
at for the introduction into it of the bradawl or other instrument E.
The rose G
is preferably secured to the door in such position that the slot G2 in the tubular
part G is so placed as to cover the hole D when the latcli-bolt and knobs or
handles are,standing in their normal positions; but when the 'knobs or handles and
spindle are turned into the position in which the latch-bolt 'is withdrawn the hole D

page_text: in the knob or handle B comes into position coincident with the slot G2 so as to be
exposed to view through the same to admit of the introduction of the instrument E.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we desire to have it
understood that we are aware that it is not novel to construct the spindle of a latch
or lock with a spring connected thereto having a tooth which takes into a rack or
into notches in the neck or shank of the knob or handle, or with a spring the end of
which passes in behind a tooth or stop in the neck or shank of the knob or handle,
and that we make no claim generally to such arrangements, but that what we do
claim is :-
The improved means of securing the knob or handle of a latch or lock to its
spindle which consist in forming the end of the spindle which enters the knob or
handle in two branches or prongs, one or both of which is or are made more or less
elastic and provided with serrations or teeth, which are adapted to engage with a
corresponding tooth or stud in or on the knob or handle, substantially as herein-
before described and illustrated in the drawings.
Dated this 29th day of August 1891,
G. H. CHUBB.
G. G. EXTON.
Per W. H. Beck,
115, Cannon Street, London, E.C., Agent.