Year: 1887

page_text: Date of Application, 21st Nov., 1887
Complete Specification Left, 20th Aug., 1888
Complete Specification Accepted, 28th Sept., 1888
We, JAMES FRAKES and JOHN LOWE, both of 19, Spout Lane, Walsall, Stafford-
shire, Lock Manufacturers, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to those padlocks and other locks which are known as
"double chambered" in which the key on being inserted through the key-hole into
the first chamber comes into contact with a cap or bridge plate and then has to be
turned about a quarter round before it can be pushed home into the second chamber
beyond the bridge plate where the bolt is situated and turned round to engage with
the bolt in the act of locking or unlocking. This bridge plate is usually fixed to the
ears through which the bolt works and it then also serves the purpose of preventing
the bolt riding up.
According to this invention as applied to a padlock having a double bitted key we
dispense with the usual bridge plate and in lieu thereof we provide on the top plate
inside the padlock two tongues of L-shape which project downwardly from the top
plate and then turn towards each other parallel with the top plate. These tongues
are situated at the extremities of the key-hole so that on the key being inserted in the
key-hole the bits come into contact with the lower parts of the tongues and before the
key can be pushed home it has to be turned about a quarter round so that the bits
will pass the said lower parts of the tongues. It can then be turned to engage with
and lock or unlock the bolt.
We prefer to form the said projecting tongues in a piece with the top plate as by
so doing the cost of manufacture is considerably reduced. This can readily be done
in punching out the hole which is covered by the bush by leaving the two tongues
connected to the sides of the hole and then, by a subsequent process or processes,
bending them downwards and towards each other into the L-shape above described;
or instead of forming the projecting tongues in a piece with the front plate they may
take the form of a separate plate which is rivetted or otherwise secured to the under-
side of the ton plate.

page_text: We prefer to use two tongues as above described but it will be evident that a
single tongue may be employed to answer the purpose, particularly with a single
bitted key.
The tongue which is adjacent to the bolt may also serve the purpose of preventing
the bolt riding out of the ears in which it works or a separate plate may be employed
for this purpose.
This invention is applicable both to those padlocks and other locks which have their
key-holes vertical and to such as have horizontal key-holes.
Doted this 19th day of November 1887

page_text: Improvements in the Construction of Padlocks and other Looks.
We, JAMES FRAKES and JOHN LOWE, both of 19, Spout Lane, Walsall, Stafford-
shire, Lock Manufacturers, 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 has reference to those padlocks and other locks which are known as
"double chambered" in which the key on being inserted through the key-hole into
the first chamber comes into contact with a cap or bridge plate and then has to be
turned about a quarter round before it can be pushed home into the second chamber
beyond the bridge plate where the bolt is situated and turned round to engage with
the bolt in the act of locking or unlocking. This bridge plate is usually fixed to the
ears through which the bolt works and it then also serves the purpose of preventing
the bolt riding up.
According to this invention as applied to a padlock having a double bitted key
we dispense with the usual bridge plate and in licu thereof we provide on the top plate
inside the padlock two tongues of L-shape which project downwardly from the top
plate and then turn towards each other parallel with the top plate. These tongues
are situated at the extremities of the key-hole so that on the key being inserted in
the key-hole the bits come into contact with the lower parts of the tongues and before
the key can be pushed home it has to be turned about a quarter round so that the
bits will pass the said lower parts of the tongues. It can then be turned to engage
with and lock or unlock the bolt.
We prefer to form the said projecting tongues in a piece with the top plate as by
so doing the cost of manufacture is considerably reduced. This can readily be done
in punching out the hole which is covered by the bush by leaving the two tongues
connected to the sides of the hole and then, by a subsequent process or processes,
bending them downwards and towards each other into the L-shape above described;
or instead of forming the projecting tongue in a piece with the front plate they may
take the form of a separate plate which is rivetted or otherwise secured to the under-
side of the top plate.
On the accompanying drawing Fig. 1 is a front view of a Padlock for a double
bitted key with our invention applied; Fig. 2 is a cross section of the same, shewing
the key inserted in the first chamber that is as far as the L-shaped tongues will
allow Fig. 3 is a similar cross section to Fig. 2 with the key turned a quarter round
and pushed home into the second chamber ready to operate the bolt; Fig. 4 is a
back view, Fig. 5 a cross section and Fig. 6 a front view of the top plate of the
padlock separately so as to shew the L-shaped tongues; Fig. 7 shews the said top
plate before the L-shaped tongues are bent up; Fig. 8 shews a back view and side
section of a modification of our invention in which the L-shaped tongues are made
in a separate plate and fixed to the top plate and Fig. 9 shews in elevation and section
the said plate separately,

page_text: The same letters of reference indicate the same parts in all the Figures.
Referring firstly more particularly to Figs. 1, 2, 3, 4, 5, 6 and 7. A is the top
plate of the padlock, B is the bush or key-hole plate which in this example has the
D D are the two
key-hole vertical and c is the pin on which the key turns.
L-shaped tongues standing inwardly from the top plate and by preference formed
therewith as shewn by piercing a hole e in the top plate of about the shape shewn
in, Fig. 7 and then by top and bottom dies worked in a press or otherwise bending
the tongues into the L-shape. When the double bitted key F is inserted in the
key-hole (see Fig. 2) the bits f¹f of the key come into contact with the lower parts of
the tongues DD2, and before the key can be pushed home to lock or unlock the
lock the key has to be turned about a quarter round so that the bits ffwill pass
between the lower parts of the tongues D¹ D². The key can then be pushed home
(see Fig. 3) and turned to engage with the bolt. Part of the bolt is shewn and
marked g.
In the modification shewn by Figs. 8 and 9 the L-shaped tongues D' D² take the
form of a separate plate as shewn by Fig. 9 which is secured to the top plate A
by the pips of the bush B passing through the holes h, h when they are
rivetted over.
We prefer to use two tongues as above described but it will be evident that a
single tongue may be employed to answer the purpose, particularly with a single
bitted key.
of
The tongue D¹ which is adjacent to the bolt 9 may also serve the purpose pre-
venting the bolt riding out of the cars in which it works (see Figs. 2 and 3) or a
separate plate may be employed for this purpose in the usual manner.
It will be understood that our invention as hereinbefore described and illustrated
as applied to locks having vertical key-holes can be similarly applied to such as have
horizontal key-holes the projecting tongues D1 D2 being provided at the extremities
of the horizontal key-hole similarly as above described and illustrated as applied to the
extremities of a vertical key-hole.
Having now particularly described and ascertained the nature of our said invention,
and in what manner the same is to be performed, we declare that what we claim is :
1st. The improvements in the construction of double-chambered padlocks and other
double chambered locks hereinbefore described and illustrated by the accompanying
drawing, that is to say, the employment on the top plate of an inwardly projecting
tongue or tongues so arranged that on the key being inserted in the lock it first comes
into contact with the tongue or tongues and then has to be turned round through a
certain angle before it can be pushed home and turned to operate the bolt, substantially
as set forth.
2nd. In a padlock or other lock, and in combination with the top plate thereof, the
inwardly projecting tongues D¹ D2, or a single tongue, formed with or attached to the
top plate for the purposes and substantially as hereinbefore set forth and illustrated
by the accompanying drawings.