IMPROVEMENTS IN LOCKS FOR DOORS AND OTHER PURPOSES
Year: 1885

page_text: I, EDWIN ELFORD DEACON of 30 Matilda Street, Barnsbury, London; N Iron-
monger, and Commission Agent, do hereby declare the nature of my said invention
for IMPROVEMENTS IN LOCKS FOR DOORS AND OTHER PURPOSES," to be as
follows:-
My improvement relates to an improved form of lock, latch or fastening for
doors, lids, etc.
The lock latch or fastening of my invention is so constructed that it requires
two or more independent motions of the key when in the lock to release the bolt
or catch. It is opened by the key from one side only, and from the other side by
an ordinary handle if required.
The end of the key is provided with a projecting piece extending past the end of
barrel and either plain or slotted to fit the wards of lock when the lock is supplied
with them.
The bolt or catch is kept out by a spring and released by the pressure of the
projecting end of key on it or on levers or plates connected to it. This part of the
mechanism is covered by a centre plate either independent or forming part of
the frame of lock and which carries the wards if any are used and the centre pin.
The centre plate is provided with a hole of just sufficient size to admit the
projecting end of key. This hole does not coincide with the keyhole in door so
that when the key is inserted in the keybole and pushed down until it bears
against centre plate it must be turned round until the part which projects past the
end of barrel is opposite hole in centre plate, when by a further inward motion of
the key this end is pushed through the hole and by acting on the bolt or levers
connected to bolt which are at the other side of centre plate releases the bolt or
catch. The centre plate may have a stop piece to stop the key when over the hole
in centre plate and also be provided with a sliding guard kept over the hole in
centre plate by a spring and spring catch which is released by the end of key as it
is revolving towards the hole.
The mode of unlocking the door is as follows:-
The key is inserted in the keyhole and pushed in until its projecting end bears
against centre plate then it is turned round in the usual way and as it turns it lifts
spring catch and pushes away the sliding guard which covers the hole in centre
plate. The turning motion is arrested when the end of key is opposite the hole in

page_text: centre plate by the stop, and the end of key which projects past the barrel is
pushed through the hole and by acting on the bolt or on levers connected to the
bolt by simple pressure releases the catch or bolt. If the end of catch or bolt is
made wedge shape the lid or door may be locked by simply shutting it but if not a
repetitition of the opening process must be resorted to. When necessary a handle
is fitted to the lock so that from one side of the door or lid the door or lid may be
opened with the handle but from the other side only with the key.
Dated thin n0th day of February 100K
.
Improvements in Looks for Doors and other Purposes.
I EDWIN ELFORD DEACON of 30 Matilda St Barnsbury London N Ironmonger
do hereby declare the nature of my invention for "IMPROVEMENTS, IN LOCKS FOR
DOORS AND OTHER PURPOSES" 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 drawing forming a part of this
specification:-
My invention relates to an improved form of lock latch or fastening for doors
lids etc.
In carrying such invention into practice I so construct the parts that in
the unlocking or manipulation of the lock or latch it is necessary to impart to the
key a'series of independent motions in order to effect any movement of the bolt
or catch.
The said invention is illustrated in the accompanying drawing in which :-
Figure 1 is a longitudinal section of a lock or latch as adapted for use in
connection with a sliding door such section being taken in so far as the lock is
'concerned upon the line A, B Figure 2.
Figure 2 is a face view of the interior of such lock.
Figures 3 and 4 are similar views to Figure 2 shewing different positions to
which the parts are brought by the manipulation of the key in the opening or
unfastening of the lock.
Figure 5 is a longitudinal section shewing the position of the movable catch
when disengaged by the key from the stationary catch.
Figure 6 is a longitudinal section of my improved lock or latch as applied to an
ordinary hinged door the section being taken on the line E, F Figure 7.
Figure 7 is a face view of certain internal portions of the said lock the case
being shewn in section as on the line C, D Figure 6.
Figure 8 is a section of my improvements as applicable in a lock for a chest
or box.
Like letters indicate the same parts throughout the drawing.

page_text: Referring first more particularly to Figures 1 to 5 a represents the carcase or
body of the lock containing the working parts; b is a centre plate secured to such
body a by screws b¹ and provided with a hole 6 of any desired shape and of
sufficient size to permit the passage therethrough of the projecting end d¹ of the
key d which has a hollow barrel ds adapted to pass over the centre pin i secured in
the centre plate b. c is a sliding guard held in position by screws c³ which pass
through a slot c¹ in such guard and are screwed into the centre plate b. c³ is a
spring carried by a screw c' and adapted to keep the sliding guard c in such a
position normally as to cover the hole in the centre plate. e represents the
catch or bolt pivotted at e¹ to the centre plate into contact with which it is
forced by the spring e². This catch or bolt has a wedge shaped head e³ which is
adapted to engage with the fixed or stationary hook or catch k. f is a spring-catch
or tumbler pivotted at f¹ to the centre plate and adapted to engage with the
sliding guard cat f* against which guard it is pressed by the spring f g represents
a pin screwed or otherwise secured in the centre plate b in any desired position so
as to prevent the turning of the key to act upon the guard c unless such key is
provided in the proper position with a notch or slot to allow it to pass over such
pin. represents a handle or knob having a spindle or shank j¹ which passes
through a slot or hole in the body or case a and is screwed into the catch or bolt e
at j³ so that such catch or bolt can be readily manipulated to unfasten the door
from the inside.
The mode of operation or unlocking of the lock is as follows:--The key is
inserted in the key-hole with its projecting end d¹ in the position illustrated in
dotted lines at q Figures 3 and 4 and is pushed in until such projecting end d
comes in contact with the centre plate b the key being guided in this first inove-
ment by a slot in the door or part to be secured which slot is of just sufficient size
to allow the end of the key to pass. When the key has thus been forced in so
as to be in contact with the centre plate b it is turned round and the slot or notch d³
in the projecting portion d¹ of such key enables the latter to pass the pin or stud g
fixed in the centre plate b. In such rotary movement of the key moreover its
end d¹ comes in contact with the spring-catch so as to lift the same clear of the
sliding guard c as shewn in Figure 3 and then comes into contact with the said
sliding guard and moves it longitudinally from over the hole 62 in the centre
plate b as shewn in Figure 4. Any further rotary movement of the key is now
prevented from the fact that the end of the slot c¹ in the sliding guard c is in contact
with the screw c² as will be understood by reference to Figure 4. The projecting
end of the key is now opposite the hole 2 in the centre plate and, in order to
release the catch e from the catch k, is pushed through this hole.
From the above description it will be readily understood that in order to unfasten
a lock or latch constructed as herein described it is necessary that the end d¹ of the
key must be provided with the slot in the proper position to allow such end to
clear the ward or stud g in the centre plate b and moreover such end d must be
properly shaped to effect the requisite movement of the spring-catch f and guard c
and also to pass through the hole 62 in the centre plate in the last movement of the
key, which hole may be of any desired configuration.
In the modified form of lock represented in Figures 6 and 7 I have shewn my
improvements as applied in connection with a sliding bolt or latch for a hinged
door. In these Figures represents a lever pivotted at to the centre plate
against which it is forced by the spring 12. This lever has a projecting piece 1³
which fits loosely in the hole 62 of the centre plate and is adapted to be acted upon
by the end d¹ of the key when forced inwards as hereinbefore explained. This
lever when forced inwards communicates motion to a bell-crank m connected by
a link m² to the sliding bolt or catch n which is guided in its movements by the
staple n¹ and the body or case a. This catch has a rounded or wedge shaped end
and is forced outwards into engagement with the fixed catch k by the spring n³
acting on the lever n'. In these Figures as also in Figure 8 I have shewn locks or
latches without a spring-catch and guard as at f, c in Figures 1 to 5. It will

page_text: be evident however that they can be readily applied to the locks shewn in
Figures 6 to 8.
Although in the above description I have referred to the use of only one ward or
ping in the centre plate it will be evident that without departing from the spirit
of my invention I may use two or more of such pins or wards the key being cut
to suit their arrangement or I can dispense with such pin or pins g.
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
First. In a lock or latch the combination with the case a the centre plate b and
the fixed catch h, of the pivoted catch e operated and controlled as to its movement
through the medium of the spring-catch the guard c and the key d provided with
a projecting portion d' and adapted to receive consecutive and independent motions
substantially as herein set forth and for the purposes specified.
Second. In a lock such as is herein described one or more wards or pins g
attached to the centre plate b and adapted to prevent the rotary or turning move-
ment of the key unless its projecting end d' is provided with a corresponding slot
or slots substantially as herein set forth.
.
Third. In a lock such as herein described the employment of a key having a
projecting end d¹ (provided with one or more slots d²) and a barrel adapted to pass
over the pin i, in combination with the centre plate b having an opening b² for
such end d¹ to be pushed through and a pin or pins g substantially as above set
forth and for the purposes specified.
Fourth. In a lock or latch such as that described with reference to Figures 6
and 7 the employment of the lever adapted to operate the sliding catch n through
the medium of the bell-crank m and link m¹ and to be actuated by a key having
a projecting portion d' substantially in the manner and for the purposes herein set
forth.
Fifth. The employment in combination with a lock or latch of a key having a
projecting portion d' which extends beyond the end of the barrel of such key so
that in the unfastening of such lock or latch both a rotary and subsequent
longitudinal movement must be given to the said key substantially as set forth.
Sixth. A lock or latch embodying in its construction the parts arranged com-
bined operating and adapted to be operated by a key substantially in the manner
herein set forth.
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