Note: Descriptions are shown in the official language in which they were submitted.
APPARATUS FOR LOCKING A CLOSURE
The invention relates -to apparatus for locking a elosure, for
example a door such as a french window or patio door whieh may be a
sliding closure.
Aceording to the invention there is an apparatus for locking a
closure, comprising conneetors adapted for eonneetion with
respective espagnolette rods an operable means slidable in a body
of the apparatus for reeiprocating the eonneetors, and a key
operable deadlock device whieh is arranged to block slidable
movement of the operable means to loek the apparatus.
The invention extends to a closure incorporating apparatus as
hereinbefore defined.
Apparatus embodying the invention is hereinafter described, by way
of example, with referenee to the aeeompanying drawings.
Fig. 1 shows schematieally a plan view of a loek with parts of the
top plate removed to show the interior~
Fig.lA shows an enlarged view of part A of Fig.l;
Figs. 2 and 3 show plan and end elevational views of a gear of the
lock of Fig.l;
Fig.4 shows an exploded perspeetive view of loeking apparatus of a
sliding door and a striker plate arrangement for the locking
apparatus, aeeording to the invention; and
FigO4A shows an enlarged view of a raek deviee.
Apparatus 20 has separate eonneetors 22 and 23 in the form of raeks
which are adapted as at 24 for conneetion with espagnolette rods 25
and a slidable locking means in the form of studs 26 in a housing
27 whieh studs 26 project from and are seeured t-o the raek 22, so
-- 2 --
27 which studs 26 project from and are secured to the rack 22, so
that when the racks move in the direction of the arrow X, the studs
move too. me racks 22 and 23 are flat, stiff, metal strips with
holes through them and are engaged with teeth of a means in the
form of two parallel spaced, of which one is shown in Fig.l, gears
28, which are turned in unison on insertion of a key in a key hole
29 of a lock 30, there being the usual differ pins (not shown) for
operation by the key to permit turning of the lock, a projecting
shaft 31 of which engages in a bush 32 to drive the gears 2~ in
unison, the gears being solid with the bush and each gear engaging
in holes of both racks to drive same.
The gear 28 and racks 22 and 23 are mounted in a generally solid
body 33 which is shown is supported by housing 27. me housing 27
have grooves in which the racks seat and which act as guides
therefor.
The housing includes a face plate 34 with spaced key-hole slots 35
through which'heads of the studs 26 project, the enlarged parts of
the slots 35 enabling the studs 26 to be passed through the face
plate 34 as the studs are smaller in diameter than the diameter of
the enlarged parts (which are essentially circular). The narrower
part of each key-hole slot provides a guide for a limb 36 of each
stud 26 which is connected to a respective rack 22 or 23. The
locking arrangement 20 is set in a slot or recess in the leading
edge of t'he patio door with the face of the housing 27 and face
plate 3~ with the key-hole slots 35 flush with that edge, so th~t
there is a gap between the rear faces (to the left in Fig.ll) of
the heads of the studs 26 and the Ieading edge. A handle 37 with
the key operated lock 30 is mounted on an inner face of the door
ad~acent the leading edge so that the shaft 31 engages the bush 32
for turning t'he gears 28, and 'hence for raising and lowering the
studs 26, and espagnolette rods 25, in unison. There is also on the
inside face of the door a dead lo~k 23 which is essentially a
slidable bolt which can be reciprocated under key operation to
engage a 'hole of the upper rack to prevent operation of the whole
locking mechanism. The door frame (not shown) includes a striker
plate arrangement 39 set into a slot or recess so that key-hole
slots 40 of a strike plate 41 of the arrangement are at the same
vertical height as the key hole slots 35 in the face plate 34.
The strike plate 41 lies over an inter~ediate plate 42 having
elongate slots 43 which have a lateral extent at least as great as
the diameter of the enlarged p æ ts of the key hole slots 35, 40 and
both plates 41 and 42 are secured to a base plate 44. The three
striking plates 41, 42, 44 are adjusta~ly secured together as by
adjustment screws 45, and the whole assembly or arrangement 39 is
secured to the door frame by screws 46 passing through aligned
holes 47.
The arrangement is such that when the door is slid up to the frame
in the fully closed position with the studs 26 in the lower,
unlocked position, the studs pass through the enlarged parts of the
key-hole shaped slots 40, and into the slots 43. When the key is
turned (anticlockwise in ~ig.4~ to lock the door S~lut the shafts of
the studs 26 ride up the narrower parts of the key-hole slots 35
and 40 so that the heads of the studs 20 ride in the slots 43 and
are 'held captive 'by the striker plate arrangement 39, the rear
surfaces of the heads being caught behind the parts of the striker
plate 41 flanking the narrower parts of the two key-hole slots 40.
At the same time, the racks 21 and 23 move away from one another so
that the espagnolette rods 25 move upwardly and downwardly
respectively to engage in upper and lower keepers. The door is thus
locked shut. Turning the lock 30 clockwise (Fig.4) provides a
reverse motion so the studs are aligned with the key 'hole slot
enlargements, and the espagnolette rods 25 are lowered and raised
respectively out o~ engagement with their keepers. The door is thus
unlocked, cmd can 'be slid away from the striker plate arrangement
to open the door. When it is desired to lock the door open, it is
merely necessary to align the nose or leading edge of the door with
the keepers 1 and 10 so that the espagnolette rods 25 can engage in
a desired facing pair of three pairs of holes 2 and slots 11 so
that on insertion of the Xey and turning it anti-clockwise as
-- 4 --
viewed raises the rack 22 and lowers the rack 23 to "throw" the
connected espagnolette rods to engage in the respective head and
cill keepers 1 and 10. On withdrawal of the key, the door is locked
in the "open" position.
me apparatus thus has a Eour-point locking action.
Referring now to the dead lock 38, this comprises a slot 49 in the
body 33, the slot 49 being generally rectangular and extending frcm
a face so to the face plate 34, and intersecting a key hole 51 the
rotational axis of which is substantially at 90 to the length of
the slot 49. In the body 33 and opening into the slot 49 adjacent
the face plate 34 is a blind hole 52 in which is received biassing
means in the form of a coil spring 53. At the end of the spring 53
adjacent the slot 49 is a latch in the form of a ball bearing 54.
~ounted in the slot 49 is a rack device 55, which has on one face a
rack 56 which is exposed in the key hole 51 and on a face opposite
the rack 56 is a pair of spaced depressions or seatings 57, 58 of a
size sufficient to receive the ball bearing 54O me depressions or
seatings comprise with the ball hearing 54 means adapted to retain
the device in a plurality of positionsO mere is also at a corner
of the rack device a groove 59 which receives a projection in the
slot 49, so that when the projection and groove interact, the rack
device 55 is guided for movement.
mere is a key (not shown) which is adapted for meshing with the
rack 56. In use, the rack device 55 is seated in the slot 49 and
usually is at the base thereof, where it provides a clearance for
the rack 23 as it reciprocates. me rack device 55 is retained in
this lower position by the ball bearing being retained in the upper
(left as viewed in Fig.4) seating 57. If however it is desired to
dead lock the apparatus 20, the key is inserted in the key hole 51
and engaged with the rack 56, and turned. miS causes the rack
device 55 to slide up in the slot 49 away from the face plate 24 so
that the free end blocks a slot in which the rack 23 reciprocates.
The rack device 55 is retained in this position by the ball bearing
54 being now engaged in the seating 58. If an attempt is then made
-- 5 --
to operate the apparatus, the rack 23, and hence the rack 22 cannot
move, so dead locking the apparatus in the closed position as shown
in Fig.4.
It will be understood that the apparatus may be deadlocked in the
open position too if the heads 26 are aligned with enlarged parts
35, if the rack device 55 is of such an area that it can pass
through an a~erture of the rack 23.
,
