Improvements in Door and like Locks.
Year: 1894

page_text: Date of Application, 17th Aug., 1894
Complete Specification Left, 8th Dec., 1894-Accepted, 12th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Door and like Locks.
We, THOMAS DACE, of 1 Eleanor Street, Bow, County of London, Locksmith,
and ARTHUR SINGLE, of 83 The Grove, Stratford, Essex, Surveyor, do hereby
declare the nature of this invention to be as follows:-
This invention relates to certain improvements in cornection with locks such as
are used with doors and furniture, and consists in the c etion and employment
of a plate movable on the shooting bolt stem for op n by a separate key to
that used for shooting the bolt, so that said bolt c e locked after being shot
home and be incapable of a motion unless the plate best removed from its locking
position.
The two keys are made to operate the same or some of the same tumblers or
levers to a greater or less distance on their pivot pin: In the one case to bring
the slots opposite a toothed projecting piece of the bolt for its free passage into
them to permit of the motion of the bolt, and in the other case for a stud on the
plate to ride in a connecting slot formed between openings in the tumblers or
levers to permit of the plate being moved along and take a fixed position behind
the head of the bolt for locking the bolt and to move back to be clear of the
head.
The projection at the back of the bolt head is so shaped that it can run into a
notch of the plate and also into certain notches of the tumblers to become secure
unless the proper key be first used.
The two keys are employed to go over the same key pin of the lock and to
actuate the same set of tumblers, one as before stated raises the tumblers for the
head projection to clear the notches and for shooting the bolt, and the other for
raising the tumblers for the stud to pass into and along the connecting slot and
the locking plate to be operated.
Dated thin 17th done of Ano 1901
H. GARDNER,
Patent Agent, 166, Fleet Street, Loudon,
Agent for the said Thomas Dace and Arthur Single.
Improvements in Door and like Locks.
We, THOMAS DACE, of 1 Eleanor Street, Bow, County of London, Locksmith,
and ARTHUR SINGLE, of 83 The Grove, Stratford, Essex, Surveyor, 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 relates to certain improvements in connection with locks such as
are used with doors and furniture, and consists in the construction and employment
of a plate movable on the shooting bolt stem for operation by a separate key to

page_text: that used for shooting the bolt, so that said bolt can be locked after being shot
home and be incapable of a motion unless the plate and its tumbler be first
removed from its locking position.
into
The two keys are made to operate the same or some of the same tumblers or
levers to a greater or less distance on their pivot pin; in the one case to bring
the slots opposite a toothed projecting piece of the bolt for its free passage
them to permit of the motion of the bolt; and in the other case for a stud on the
plate to ride in a connecting slot formed between openings in the tumblers or
levers to permit of the plate being moved along, and. the tumbler to take a fixed
position behind the head of the bolt for locking the bolt, and to move back to be
clear of the head.
The projection at the back of the bolt head is so shaped that it can run into a
notch of the plate and also into certain notches of the tumblers to become secure
unless the proper key be first used.
The two keys are employed to go over the same key pin of the lock, or in the
same keyhole if no pin be provided, and to actuate the same set of tumblers, one
as before stated raises the tumblers for the head projection to clear the notches and
for shooting the bolt, and the other for raising the tumblers for the stud to pass
into and along the connecting slot and the locking plate to be operated.
Our invention will be clearly understood by reference to the annexed drawings.
Figure 1 is an elevation of a mortice or door lock with the bolt rack and all the
parts in their normal positions.
Figure 2 represents the same lock after insertion of the first key and the lifting
of the tumblers or levers for moving the bolt into the position shown in said
figure.
Figure 3 represents the bolt shot home by the further movement of the
first key.
Figure 4 indicates the first action of the second key by lifting the tumblers or
levers belonging to the plate.
Figure 5 shows the position the plate and its tumblers or levers occupy after the
full use of the second key for locking the bolt which had been already shot home
by the full action of the first key.
Figures 6 and 7 are views of the two keys for the foregoing arrangement of
mortice or door lock.
Figure 8 is an internal view of the box of the lock.
Figures 9 and 10 an elevation and plan of the bolt.
Figure 11 clevation of the plate which lies in front of and next to the bolt.
Figure 12 is a view of the tumbler or lever next the plate. Figure 13 similar
view of the next tumbler or lever, and Figure 14 the next tumbler or lever,
Figure 15 being an elevation of the tumbler or lever by which the locking of the
bolt when shot home is effected.
All these tumblers or levers are of the kinds usually fitted in locks but the
arrangement of the notches and grooves are special, the bolt is also much like
usual bolts in locks but is provided with projection or lug on the front just behind
the nose, as seen at Figures 9 and 10. The plate Figure 11 is in itself not novel
but it has slots and a groove and a stud specially arranged and placed for operation
by a special key after one or more tumblers or levers have been raised.
It may be here observed that the key which locked the locking bolt after the locking
bolt has been shot home must be the first one used to lift the tumblers or levers for
the plate to be drawn back to release the locking bolt from its otherwise fixed
position both keys being available for a single key hole.
We have only represented a mortice or door lock in the drawings but the
invention is applicable for all kinds of locks whether they be rim, dead, stock, desk,
pad, till, or other.
A is the box, B, C, studs therein on which the
slide under the action of the respective keys F, G.
11
LLL
bolt D and plate E are free to
H, J, K, M, are the lock bolt

page_text: P is notch in the locking bolt D, the length of which coincides with the slot P¹
of the plate E.
Qis a combined guide stud and pivot for carrying all the tumblers or levers.
R is a stud guide on the plate E for movement in the slots S, S, these having
teeth S¹, S', for the stud Ŕ to pass between and occupy a position in the upper
part only at each travel of the plate E, this happening when the tumblers or
levers drop after release by the keys, and are retained in the downward position by
the pressure of the springs L, L, L, L.
Tis a projection or stud on the front face of the bolt D, and U, U, are notches
in the forward edges of the tumblers or levers and also in the plate E for sliding
thereon when the tumblers are properly lifted for the bolt D to be moved in or
out of the box A, the notch in the plate, tumbler, or lever M having a claw U₁ to
fall behind the extreme end V and so lock the locking bolt, as at Figure 5, until
all the tumblers or levers be lifted for their openings U to be level or in register
with the projection T, V, to enable the projection T, V, with the bolt D to move
backwardly, as indicated by Figure 2, for the extreme end V to pass into the
upper part of the notch and behind U¹ which is effected after the tumbler or
lever M has been raised by the second key which also moves the plate D back, the
plate tumbler or lever then resting upon the extreme end V, as at Figure 1, the
other tumblers or levers being then in their normal position.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The improvements in door and like locks whereby the bolt with one key can
be shot and locked, again locked by another key, as set forth.
2. In connection with door and like locks, providing tumblers with slots, and
one or more tumblers with a hooked slot in their forward ends, and toothed slots at
about their centre portion, and a projection at the back of the bolt head, so that
on the application of a key, the tumbler or tumblers with the hooked slot can be
removed from contact with a claw on the projection of the bolt head, and the other
tumblers have their toothed slots put into register to enable the bolt to be shot,
and by the tumblers falling on the removal of the key to lock the bolt, and whereby
on the application of another key, the tumblers can be again moved to put the
toothed slots into register to enable a plate having a projection to be moved to lock
the bolt a second time after the removal of the key, the operation of unlocking
being commenced by the second named key and afterwards by the first named
key for the projection on the bolt head to enter the slots in the ends of the
tumblers, and the bolt to be locked, substantially as described and in the manner
shown.
TL OL 1
2004
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Thomas Dace and Arthur Single.