An Improvement connected with Cupboard and Drawer Locks and in the Preparation of the Openings to Receive such Locks.
Year: 1898

page_text: PROVISIONAL
An Improvement connected with Cupboard and Drawer Locks and in
the Preparation of the Openings to Receive such Locks.
I, OTTO HASS, of 261, Burdett Road, Limehouse, London, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to an improvement connected with cupboard and drawer
locks and in the preparation of the openings to receive such locks.
For the purpose of my said invention, I form the opening between the front
and back plates on each side of tapered or wedge shaped formation and this
I ensure by making the rivets or distancing pieces of angled or tapered shape, so
that the projecting portions of the back plate are out of the parallel, or at a
different angle to the front plate, or the tapered opening may be effected by
bending the edge or end of the back plate to the desired angle, so that the
distancing plates when the lock is pushed in position in an aperture cut in the
cupboard door or drawer front for the purpose, hold the lock firmly by the front
and back plates engaging a fillet in the woodwork.
To prepare the aperture for such a lock, I recess as for an ordinary cupboard
or drawer lock and in addition I chamfer the back wall at an incline to the
lower part in its own thickness, so that a double wedge is formed to fix the lock
when slipped in and pushed home, the fixing being without nails, screws, or
other kind of fasteners.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Otto Hass.
An Improvement connected with Cupboard and Drawer Locks and in
the Preparation of the Openings to Receive such Locks.
I, OTTO HASS, of 261, Burdett Road, Limehouse, London, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:
This invention relates to an improvement connected with cupboard and drawer
locks and in the preparation of the openings to receive such locks.
For the purpose of my said invention, I form the opening between the front
and back plates on each side of tapered or wedge shaped formation, and this
I ensure by making the rivets or distancing pieces of angled or tapered shape, so
that the projecting portions of the back plate are out of the parallel, or at a

page_text: different angle to the front plate, or the tapered opening may be effected by
bending the edge or end of the back plate to the desired angle, so that the
distancing plates when the lock is pushed in position in an aperture cut in the
cupboard door or drawer front for the purpose, hold the lock firmly by the front
and back plates engaging a fillet in the woodwork.
To prepare the aperture for such a lock, I recess as for an ordinary cupboard
or drawer lock and in addition I chamfer the back wall at an incline to the
lower part in its own thickness, so that a double wedge is formed to fix the lock
when slipped in and pushed home, the fixing being without nails, screws, or
other kind of fasteners.
My invention is clearly represented on the annexed drawings.
Figure 1 edge elevation of lock with the whole of the back plate set at an
angle or outwardly at the bottom.
Figure 2. edge elevation of lock with the ends only of the back plate -set at an
angle, the body portion of the back plate being parallel with the front plate.
Figure 3 back elevation of lock.
Figure 4 plan of lock frame in which the end edges of the back plate are
turned inwardly at an angle from the top corners to the bottom corners to con-
stitute a wedge.
Figure 5 section of drawing showing angled groove and key hole.
Figure 6 inside face view of drawer.
Figure 7 plan.
Figure 8 perspective elevation of inside face of drawer showing the top recess
into which the top plate of the lock finds a lodgment when pushed down into
the opening prepared for it.
Referring to Figures 1 and 3, A, front plate of lock. B, back plate of lock.
C, distancing pieces, the back edge of which is cut at a slight angle to determine
the angle of the back plate B. D, bolt. E, spring for retaining bolt in an
open or a closed (shut) position when actuated by a key or by a turn button, if
one be provided.
F rivets which fix the front plate and the back plates to the distancing pieces,
said rivets being separately fixed or formed from the distancing pieces, such as
by pegs passed through the front and back plates and rivetted home in the well
known manner. In these figures, the back plate B is a plain flat piece of metal
set at an angle by the shape of the distances pieces, but at Figure 2 the greater
part of the back plate only is of plain flat form the two side edges being stamped
and set at an angle to meet the back angled edges of the distancing pieces C.
According to Figue 1, the side edges G, G, of the back plate is set askew in
their depth to form the angle for biting against the wood in the groove of the
drawer or cupboard when pushed in, the springiness of the edges of the back plate
ensuring the absolute fit in the groove H which is also cut at an angle. as seen
at Figure 5 I being the recessed part of the wood shaped to correspond with
that of the bottom edge of the back plate B. This recess is shown as of rounded
shape but it may be square or of other shape to conform to that of the bottom
of the lock and the inner face of the wood may be recessed for the front plate A
of the lock to lie flush therewith.
In the view Figure 8, the dotted lines a, a, show that the front plate of the lock
projects, and this is preferable because the wood is less cut away, and consequently
greater strength is reserved. The top plate J of the lock is recessed into the
wood M at K, K, to lie flush when the lock is pushed home in the groove H.
L is the keyhole.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. A drawer or erpboard lock with back plate set at an angle to be wider at
the bottom or at the side edges than at the top, whereby said lock can be located

page_text: in the recess by the bite of the back plate without screws or other fasteners, as
set forth and as shown.
2. The herein described improvement in cupboard and drawer locks and in
the preparation of the openings in the wood or the cupboard or drawer for such
locks as represented in the annexed drawings.
3. Setting the back plate or the side edges only of a cupboard or drawer lock
at an angle and in forming the groove of the wood at an angle for the reception
and fixture of the back plate, as and for the purpose explained.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Otto Hass.
H.
GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Otto Hass.