Year: 1887

page_text: Date of Application, 25th May, 1887
Complete Left, 21st Sept., 1887
Complete Accepted, 2nd Dec., 1887
JOHN TUCKETT (Carpenter & Joiner) 7 Manor Park Road East End Finchley
London N. GEORGE HERBERT FOSTER (Engineer) 142 Barnsbury Road, Islington
London, N. do hereby declare the nature of this invention to be as follows:-
The invention is a mortice lock and can be fitted to any door from 14" thick. It
can also be applied to drawers with the same security. It has 3 distinct fastenings
and is worked by 4 cog wheels. It has a large cog wheel with a mortice in it into
which the middle bolt is drawn by means of a traveller which is connected to the
large cog wheel. It has a top and bottom bolt which are in a brass casing and is
secured to a brass plate which is let in and screwed into the edge of the door. These
bolts are worked by means of 3 cog wheels which are placed in position so that the
large cog wheel can throw the top, bottom, and middle bolts at the same time. The
3 bolts are secured by means of a set of levers and traveller and these are protected
by a special lever which can only be lifted by the key which is fitted to the lock.
The key has a slot in it into which is fitted a lever which has to lift the protecting
lever before the lock can be opened thereby forming the special security.
It has a catch and is opened and shut in the usual way by a pair of knobs, spindle
& tumbler. This catch is provided with a bolt, the action of which prevents the catch
from being opened by the knob on the outside. This lock is a four fold security from the
fact that it bolts the door at distinct places at the same time. These bolts are each of
them a special security because supposing, the top & middle bolts should be either
wrenched open or the woodwork in the framing to be cut away, there still remains
the bolt at the bottom which it is impossible to cut out. Then its other security
against picking is in its internal construction which is made so that no ordinary key
will unlock it, because to open it there must be two distinct actions in the same key.
It has another advantage which is that it prevents the door from twisting which is a
great object, particularly in large doors.

page_text: An Improved Mortice Lock.
JOHN TUCKETT 7 Manor Park Road East Finchley Carpenter and Joiner GEORGE
HERBERT FOSTER, Engineer 142 Barnsbury Road, Islington, 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 :-
The invention is an Improved Mortice Lock & can be fitted to any door from
14" thick it can be applied to drawers with the same security. It has three distinct
fastenings and is worked by four cog wheels. It has a large cog wheel A with a
mortice in it into which the middle bolt B is drawn by means of a traveller which
is connected to the large cog wheel A. It has a top D & bottom bolt E which are in
a brass casing F & is secured to a brass plate G which is let in & screwed into the
edge of the door. These bolts are worked by means of three cog wheels H. I. J.
which are placed in position so that the large cog wheel A can throw the top D
bottom E & middle bolts B at the same time. The three bolts are secured by means
of a set of levers K & traveller C & these are protected by a special lever L.
The top plate U has a recess cut in it (marked Z plate 1) in which the lever L
(plate, 2. & top plate U) works upon the screw A' so that the part of the lever L in
the recess (marked Z plate. 1.) is flush with the surface of the top plate U the part of
the lever L which is outside of the recess has a set in it (plate, 2.) so that it comes
above the surface of the top plate U to allow the moveable end V which is fitted to
the lever L (plate, 2. & top plate U) to work in and out of the slot W by the action
of the lever O on the key M and the springs X & Y. The movement of the lever L
is that, when the lock is shot by the key M the springs X & Y force the moveable
end V along and up into the slot W its action in locking is therefore automatic.
But in unlocking, after the key M has been put into the lock the end of the lever O
nearest the bow has to be pressed down this movement will cause the end 0¹ of the
lever O to come up and above the barrel of the key M so that while turning the key M
the part O' comes against the shoulder O² on the lever Land lifts that part of the
lever L up, thereby causing the moveable end V to be drawn down and out of the
slot W, and when this is done the key M has lifted the levers K high enough to begin
to draw the traveller back thereby unlocking the door.
The key M has a slot in it N into which is fitted the lever O which has to lift the
protecting lever L before the lock can be opened thereby forming a special security.
This lock is also fitted with a catch P which is opened & shut in the usual way by a
pair of knobs, spindle Q and follower R. The top and bottom plates have slots S¹ cut
in them to guide the bolt S into the hole S2 in the catch P it is also fitted with a
knob T for use on the inside of the door. Its action is that the catch P can be secured
by sliding the bolt S along the slot S¹ and then pushing it down so that the tapered
point of the bolt S enters the hole S2 in the catch P and prevents the door from
being opened by the knob on the outside. These locks are made so that the catch

page_text: arrangement can all be taken out where not required & without altering any of the
other parts.
Having now particularly described and ascertained the nature of our invention,
and in what manner the same is to be performed we declare that what we
claim is.
(1) That this is an Improved Mortice Lock from the fact that it bolts the door at
three distinct places at the same time.
(2) That these bolts are each of them a special security, because, supposing that the
top and middle bolts should be either wrenched open or the wood or ironwork in the
door frame to be cut away then there is still remaining the bolt at the bottom which
it is impossible to cut out.
(3) Then its other security & improvement is in the internal construction which is
so made that no ordinary key will unlock it, because to open it there must be two
distinct actions in the same key.
(4) That the plate and casings of the top and bottom bolts prevent the door from
warping which is a great object particularly in large doors.
(5) Another improvement is that there is no keyhole on the inside although the
door can be locked from the inside by means of the knob and bolt which secures the
catch, so that the door cannot be opened by the persons from the outside although
they may have the key.
Dated this 21st day of September 1887.