Improvements in Mortice Door Locks with Spring Bolts.
Year: 1894

page_text: Date of Application, 13th Jan., 1894-Accepted, 24th Feb.,
1894
1
COMPLETE SPECIFICATION.
Improvements in Mortice Door Locks with Spring Bolts.
I, LUDWIG ENDRES of Calle Maipu 446, Buenos Ayres, South America,
Architect, 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 improvements forming the subject of this invention relate to mortice locks
with spring bolts arranged to open when the door is pushed and have for their
object the better securing or fixing of the bolt in addition to or without its being
locked by the key, and to render the lock applicable to swing or draft doors opening
both ways and with any inclination of the door edge.
On the two sheets of drawings appended hereunto
Fig. 1 shows the improved lock with the cover removed, as locked by the
key only.
Fig. 2 the same in its unlocked position, that is to say with the spring bolt free
to move;
Fig. 3 the lock locked by the key and secured by the catch;
Fig. 4 the same in its unlocked position but secured by the catch;
Fig. 5 a section along line 1-1,
Fig. 6 a section along line II-II,
Fig. 7, a section along line III-III, Fig. 1.
Fig. 8 shows the key used in two views.
Figs. 9 and 10 are longitudinal sections along lines IV-IV and V-V of
Fig. 1;
Fig. 11 a side view of the new lock
Fig. 12 an end view of the same.
;
Figs. 3, 14 and 15 show different adjustments of the edge plate on the lock case
in plan.
In the lock case A a bolt B is arranged sliding on a guide block a and formed
with a slot into which a helical spring c is inserted and presses the bolt outwards.
The head d of the bolt is chamfered on both sides towards the point in order to
adapt the lock for doors opening to either side. By pushing against the door the
bolt is pushed back and the door can be opened, when the bolt is not locked.
For locking the spring bolt B notches e and f (Figs. 2 and 4) are formed in it
into which the catches i and of the tumblers g and can drop. The tumbler g is
operated by the key C, by which for opening or shutting the lock the barrel Ď is
turned from left to right or from right to left respectively (Figs. 1 to 4), the
eccentric middle part of the barrel depressing or releasing the tumbler g. The
umbler with the catch entering the notch on the bolt B, is operated by the
catch lever acting on its inclined end; the upper end m of the lever enters a
hotch in the edge of barrel D when in the position for locking the bolt and thus
besides locking the bolt B locks the barrel D so that the lock cannot then be
opened even with the suitable key. The tumblers y h are subject to the action of
prings so that when these tumblers are released the springs withdraw the
atches ik from the notches ef.
In order to prevent the barrel D with the two notches nn being turned too far,
peg o is fixed in the same coming against stops fixed to the lockcase, so that the
arrel D can only be turned for half a revolution in one or the other direction.
The spring p fixed to the inside of the lockcase holds the barrel in its locking and
pening position, if the lever 1, which is used as a night latch, is not brought into
ction.

page_text: The lock arranged as above described may thus be secured either with the key,
or the night latch (operated by button E), or simultaneously by both of them. In
Fig. the key only has been used; the barrel D has been turned by it in the
direction of the arrow and the eccentric part of the barrel has pressed the
tumbler g downwards. The spring p by springing into a notch n secures the position
of the barrel. The night latch E or lever 1 m is in its inoperative position. If the
barrel is now turned in the direction of the arrow on Fig. 2, the bolt B is liberated
again, but remains pushed out by the spring c.
In Fig. 3 the bolt B is locked both by tumbler g and / or the lock is further
secured in its locked position by the night latch. The lever 1 m has been turned in
the direction of the arrow from left to right, whereby the catch m has been entered
into the notch n of the barrel D, so that the lock cannot now be opened even with
the suitable key.
Fig. 4 shows the securing of the bolt D by the night latch only; in this
case also the lock cannot be opened with the key, as the movement of the barrel D
is arrested.
The edge plate F is not fixed rigidly to the lock case- but by means of angle
pieces provided with slots for the screws r. The edge plate F swings round the
pointed edges s of the upper and lower lock case walls (Figs. 13 to 15) and when
set to the inclination of the door edge, is fixed to the lock case A by means of the
screws r. It is evident that the mortice lock with moveable edge plate can be used
for any inclination of door edge by adjusting said edge plate correspondingly. In
order not to have too large an opening t in the edge plate for the bolt B, and to
render the lock applicable to doors swinging to either side, the bolt B is tapered on
both sides.
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 :
1. The arrangement or combination of parts of a mortice lock substantially as
hereinbefore described and illustrated by the drawings.
2. In a mortice door lock with spring bolt the arrangement of tumblers (g.h)
formed with catches (ik) for entering notches (ef) in the spring bolt and locking
the same, one of said tumblers (9) being operated by the key and an eccentric
barrel D and the other (h) by a lever (1) formed at its upper end with a catch
entering into a notch (n) on the edge of the barrel, so that the lock can then no
longer be opened with the key; and springs (9' ') for withdrawing the tumblers
when released from the bolt, so that the door can be opened without a key by
pressing against it substantially as hereinbefore described and illustrated by the
drawings.
3. In mortice door locks with spring bolts the arrangement of an adjustable edge
plate and a bolt chamfered on both sides substantially as herein before described and
illustrated and for the purposes set forth.
Dated this 12th day of January 1894.
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.