U.S. patent number 3,881,331 [Application Number 05/402,688] was granted by the patent office on 1975-05-06 for locking device incorporating a lock case, an escutcheon and a door handle.
This patent grant is currently assigned to GKN-Stenman AB. Invention is credited to Nils Kaj Gunnar Rosenqvist, Erik Rudolf Tranberg.
United States Patent |
3,881,331 |
Tranberg , et al. |
May 6, 1975 |
Locking device incorporating a lock case, an escutcheon and a door
handle
Abstract
A locking device incorporates a lock case, an escutcheon housing
and a door handle. The lock case houses a spring bolt mechanism
operable by the door handle and a dead bolt mechanism operable by a
locking mechanism. The spring bolt and the dead bolt are separately
latchable. The escutcheon housing contains a substantial part and
preferably the whole of a lock cylinder mechanism for latching the
spring bolt. The dead bolt mechanism is adapted to be actuated, at
any rate from one side, by a key via lock cylinder mechanism or a
tumbler lever mechanism. From the other side the dead bolt can be
latched or released via the said tumbler lever mechanism, a
separate lock cylinder mechanism or a handle. Said handle may also
cooperate with the spring bolt via a separate mechanism contained
in a second escutcheon housing. When the dead bolt is actuated by a
tumbler lever mechanism a cover plate in the escutcheon housing
preferably cooperates with the spring bolt mechanism so that it
covers the key hole for the tumbler lever mechanism when the spring
bolt is being latched.
Inventors: |
Tranberg; Erik Rudolf
(Eskilstuna, SW), Rosenqvist; Nils Kaj Gunnar
(Eskilstuna, SW) |
Assignee: |
GKN-Stenman AB (Eskilstuna,
SW)
|
Family
ID: |
23592954 |
Appl.
No.: |
05/402,688 |
Filed: |
October 2, 1973 |
Current U.S.
Class: |
70/107; 70/218;
70/149; 70/427 |
Current CPC
Class: |
E05B
59/00 (20130101); Y10T 70/5496 (20150401); Y10T
70/5805 (20150401); E05B 65/0032 (20130101); Y10T
70/7977 (20150401); E05B 17/18 (20130101); Y10T
70/5226 (20150401) |
Current International
Class: |
E05B
59/00 (20060101); E05B 65/00 (20060101); E05B
17/18 (20060101); E05B 17/00 (20060101); E05b
059/00 (); E05b 013/00 () |
Field of
Search: |
;70/107,111,149,218,427 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Craig, Jr.; Albert G.
Attorney, Agent or Firm: Sughrue, Rothwell, Mion, Zinn &
Macpeak
Claims
What we claim is:
1. A locking device comprising:
a lock case, an escutcheon housing and a door handle;
the lock case including therein a spring bolt operable by a
sectioned bar, said sectioned bar in a cooperative arrangement with
the door handle;
a cylinder lock mechanism to effectuate a locking of said spring
bolt, said lock mechanism being substantially contained in the
escutcheon housing;
a dead lock mechanism including a dead bolt latchable separately
from the spring bolt; and
means in said escutcheon housing cooperating with said lock
cylinder for releasing the door handle from the sectioned bar upon
the latching of the spring bolt.
2. A locking device according to claim 1 wherein the escutcheon
housing has an opening for a second locking mechanism adapted for
the dead bolt.
3. A locking device according to claim 2 wherein the locking
cylinder is positioned in a projecting portion of the escutcheon
housing.
4. A locking device according to claim 1 wherein the lock cylinder
is positioned offset from the axis of the sectioned bar level
between said axis and the dead bolt.
5. A locking device according to claim 1, including means for an
interconnection of the two lock mechanisms such that from one side,
both the dead bolt and the spring bolt are releasable by actuation
of the lock mechanism of the dead bolt, said interconnecting means
being partly contained in a second escutcheon housing which is
located on the opposite side of the door in relation to the
escutcheon housing which houses the lock cylinder and being
operable by said handle.
6. A locking device according to claim 5, characterized in that
turning of the handle in one direction will cause, upon
commencement of the turning movement, a releasing of the dead bolt
and, upon further turning, a releasing of the spring bolt.
7. A locking device according to claim 5, wherein both escutcheon
housings are of substantially the same length as the lock case.
8. A locking device according to claim 1, wherein the dead bolt is
releasable from the side of the door provided with the escutcheon
housing only after the spring bolt has been released or activated
for release.
9. A locking device according to claim 8, wherein the dead bolt
mechanism interacts with a tumbler lever mechanism which is
operable by means of a key, the said key being insertable through a
keyhole made in the escutcheon housing, the lock cylinder of the
cylinder lock interacting with a means in the escutcheon housing
arranged in one position to cover the keyhole of the dead lock so
that a key cannot be inserted.
10. A locking device according to claim 9, wherein the said means
comprise a cover plate which is arranged to cover the keyhole when
the spring bolt is latched by releasing of the door handle from the
sectioned bar.
11. A locking device according to claim 10, wherein the lock
cylinder cooperating with means, displaceable in the escutcheon
housing, interacts with the cover plate, said displaceable means
also arranged to bring a driver into engagement or disengagement,
respectively, with a recess provided in the sectioned bar for
interconnection and releasing, respectively, of the door handle and
sectioned bar.
Description
This invention relates to a locking device incorporating a lock
case, an escutcheon housing and a door handle, the lock case
housing a spring bolt operable by the door handle via a sectioned
bar, e.g. a square bar, for a cylinder lock mechanism and a
deadlock mechanism provided with a dead bolt.
In a locking device of this kind the lock case usually has certain
prescribed dimensions in order to fit into recesses provided in
doors in accordance with current standards.
One object of the present invention is to provide, without
increasing the dimensions of the lock case, a door lock with
substantially improved locking safety.
A further object of the invention is to provide a locking device
with improved locking safety which by simple exchange can replace a
door lock of conventional type, such as a cylinder lock or a
tumbler lever lock of normal design, without any major interference
with the door being necessary.
A further object is to provide an improved locking device which is
readily adaptable for different applications such as a house front
door, an apartment door, a hotel room door, etc.
These and other objects are satisfied by a locking device according
to the present invention, which in its broadest aspect is
characterized by the spring bolt and the deadbolt being separately
latchable independently of each other.
Optimal locking safety is obtained in that two separate lock
mechanisms are combined in such a manner within one and the same
locking device as to be separately latchable. An existing
conventional cylinder lock in a door, built in according to current
standard, can quickly and easily be replaced by a combined lock
according to the invention without any interference with the door
being necessary. The master key suite of the replaced cylinder lock
can then be retained, if so desired, at the same time as additional
locking safety is afforded thereby that the dead bolt is operable
by a special key, to which in different individual cases only one
person or a certain group of persons has access. Thus in the case
of an apartment key the landlord can have a master key which can be
used for actuation of the spring bolts for the locking devices of
all apartments, while the individual apartment tenant has, in
addition to a key for actuation of the spring bolt of the locking
device, also and solely a key for actuation of the dead bolt. The
apartment tenant can thus prevent the landlord from being able to
enter the apartment when the tenant does not wish him to do so.
When the locking device is used as a hotel room lock the hotel
management can have access to the keys for actuation of the dead
bolts of all the locking devices in the hotel. If so desired,
certain rooms can then be latched, so that a person having access
to a key to the spring bolt only cannot gain entry into the hotel
room. On the other hand the spring bolt as well as the dead bolt
can, if so desired, be operable from the inside by one single
handle, enabling the hotel guest, while occupying the room, to
prevent a member of the cleaning staff with access only to the room
key for actuating the spring bolt from being able to enter the
hotel room when the hotel guest does not grant access.
In one embodiment the dead bolt is operable by a lock mechanism
incorporating a tumbler lever. This embodiment is highly suitable
both as a house lock and as an apartment lock, wherein in addition
to the spring bolt, the dead bolt is latched via the tumbler lever
mechanism this is particularly useful in cases when the house or
apartment is left for some length of time or if extra locking of
the outside door is wanted at night.
One embodiment of the invention is characterized in that the spring
bolt, from the side of the door provided with the escutcheon
housing, is both latchable and releasable regardless of whether the
dead bolt is latched or released and in that the dead bolt, from
the opposite side of the door, is latchable and releasable
regardless of whether the spring bolt is latched or released.
In this embodiment, it is possible by comparatively simple means to
provide an extra safety arrangement, for example by blocking, from
the outside of the door in connection with latching of the spring
bolt, access to the key hole of the dead bolt. From the inside, on
the other hand, a possibility is offered of actuating the dead bolt
as well as the spring bolt in the ordinary manner regardless of
whether one or both of them from the outside are latched.
In one preferred embodiment of the invention, the escutcheon houses
a greater part of the whole of the lock cylinder of the cylinder
lock and the lock cylinder is arranged for actuation of a member in
the escutcheon housing by means of which the door handle is
releasable from the sectioned bar for or at the latching of the
spring bolt.
Within the scope of the invention it is thus possible to locate
some of the operating means to the escutcheon housing which has a
stout, robust and at the same time attractive design. Also, the
prescribed lock case dimensions are maintained and good and
reliable function of the two lock mechanisms are secured.
One further embodiment of the invention is characterized in that
also the deadlock mechanism is arranged to be actuated, from one
side, by a lock cylinder. This embodiment is particularly
preferable when the locking device is used as a hotel room lock, in
which case the above-mentioned advantages are also obtained. It can
however also be used to advantage as both a house lock and an
apartment lock.
Despite the two bolts being latchable independently of each other,
the locking device is in one embodiment provided with means for
such interconnection of the two lock mechanisms that, at any rate
from one side, the two bolts are releasable by actuation of the
lock mechanism of only the dead bolt. The interconnecting means can
then, according to a preferred embodiment, at any rate partly be
contained in an escutcheon housing located on the opposite side of
the escutcheon housing which houses the lock cylinder.
This embodiment is thus characterized by stoutly constructed
escutcheon housings on both sides of the door, one of which,
located on the inside of the door, houses the said mechanism that
interconnects the two lock mechanisms. It is then preferred that
the interconnecting means be operable by means of a handle carried
in the last-mentioned escutcheon housing, the device being
elaborated to advantage so that turning of the handle in one
direction initially causes releasing of the dead bolt and that upon
further turning releasing of the spring bolt is achieved.
The escutcheon housing is appropriately provided at the rear with a
cover plate having different recesses, among others for guiding of
the driver and a projection provided on the bolt catch, and a
keyhole, so that access to the lock case for actuation of the dead
bolt is allowed. Further members, such as a retaining plate, a
washer through which the spindle of the door handle is passed, a
stop ring and a guide plate are also housed in the escutcheon
housing on the inside of the aforesaid cover plate. The escutcheon
housing is secured to the door by means of a number of socket nuts
passed through the cover plate, which socket nuts engage with
screws that from the inside of the door are passed through an
escutcheon housing or member which can be designed in different
ways.
In practice it is preferred that the dead bolt housed in the lock
case be located above the spring bolt. It is, however, conceivable
to instead locate the spring bolt uppermost. It is preferred that
the spring bolt, as is the case in a conventional lock, interacts
with a latch pawl which, when the door is closed, releases a catch
hook that latches the spring bolt. By this means the possibility is
eliminated of moving the spring bolt to the open position by means
of a tool introduced between the side edge of the door and the door
frame.
Further features of a locking device according to the invention
will become apparent from the following description of some
embodiments thereof, wherein reference is made to accompanying
drawings.
FIG. 1 is a perspective view showing two principal parts, i.e., the
escutcheon housing and lock case of a locking device according to
the invention.
FIG. 2 is a side view of the lock case with one wall removed, so
that the locking mechanisms contained therein are revealed.
FIG. 3 is a rear view of the escutcheon housing shown in FIG. 1
after removal of a cover plate which forms the inner end surface of
the escutcheon housing. The figure shows interacting parts in a
position in which the door handle and square bar are connected
together with each other.
FIG. 4 is a view corresponding to FIG. 3 with interacting parts in
a position in which the door handle is disengaged from the square
bar. A cover plate then covers the keyhole of the dead lock.
FIG. 5 is a front view of the escutcheon housing for a different
embodiment of a locking device according to the invention,
especially intended for hotel room locks.
FIG. 6 shows the escutcheon housing according to FIG. 5 viewed from
the rear.
FIG. 7 is a section along line VII--VII of the housing according to
FIG. 5, while also illustrated is an escutcheon housing fitted to
the opposite side of the door (not shown).
FIG. 8 is a front view of an escutcheon housing located on the
inside of the door.
FIG. 9 shows the escutcheon housing according to FIG. 8 viewed from
the rear.
FIG. 10 is a section along line X--X of the escutcheon housing
according to FIG. 8.
FIG. 11 shows the upper part of a lock case modified in relation to
FIG. 2, in which lock case the dead bolt is arranged for actuation
of a cylinder lock mechanism.
FIG. 12 is a cross section showing a part of yet another
embodiment, in which the dead bolt on both the inside and the
outside of the door is operable by means of a lock cylinder.
FIG. 13, finally, shows a part of an escutcheon housing further
modified in relation to FIGS. 1 and 5.
A locking device 1 comprises a lock case 2 and an escutcheon
housing 3 in which is mounted a door handle 4. The door case houses
both a spring bolt 5 operable by the door handle as well as a latch
pawl 6 and appurtenant mechanisms, which are shown in FIG. 2 and
will be described in more detail below, and also a dead bolt 7 and
appurtenant tumbler lever mechanism, which is intended to be
operated by means of a lever key which is insertable through a
keyhole 8 provided in the escutcheon housing. A thickened part 3a
of the escutcheon housing houses a lock cylinder 9 of conventional
type, by means of which the door handle 4 can be disengaged from
the square bar 10.
The spring bolt 5, the latch pawl 6 and the dead bolt 7 are passed
through recesses in a strike plate 12 fitted in the side edge of
the door 11.
The lock case, despite its containing two mutually independent lock
mechanisms, has the same standard dimensions as lock cases for
conventional spring bolt locks with, attached to the lock case, a
lock cylinder or dead lock with a bolt operable by a door handle. A
lock case 2 according to the present invention can therefore take
the place of previously known conventional lock cases without any
interference with the door being necessary.
The principal parts of the two lock mechanisms are illustrated in
FIG. 2. When the door handle is turned, a follower 16 provided on
the square bar 10 moves the spring bolt 5 towards the right in FIG.
2 by the action of a spring 17. The latch pawl 6 interacts via a
link 18 with a bolt hook 19. When the door is closed the latch pawl
6 is pushed in by the action of a spring 20, whereupon the bolt
hook 19 is released by the link 18 so that the spring bolt 5 is
held fixed in the locked position and cannot be displaced inside
the lock case, e.g. by means of a tool introduced between the door
frame and the strike plate 12.
The movements of the dead bolt 7 are regulated by a key insertable
in the keyhole 8 via a bolt disc 21, preferably seven
spring-actuated tumbler levers 22, a bolt arm 23, a latch arm 24
and a bolt hook 25, which is actuated by a spring 26. The lowermost
lever rests against a support plate 28.
The mechanism housed in the escutcheon housing 3 will now be
described in greater detail with reference to FIGS. 3 and 4.
The active part 9a of the lock cylinder interacts with a follower
31, which upon turning of the lock cylinder by means of a key (not
shown) is movable between two end positions shown in FIG. 3 and
FIG. 4, respectively. Two fan-shaped recesses 31a in the follower
allow turning of the key of the lock cylinder a quarter of a
revolution in the normal manner in order for the key to be
removable from the lock without actuating the follower. Via a pin
31c, the follower actuates a bolt 32, which is in the form of a
disc with a centrally bowed section and a pointed lower end. The
bolt is arranged to move a driver 33 into and out of a recess
provided in the square bar 10 for interconnection of the door
handle 4 and the square bar 10 or for disengagement of these two
parts in relation to each other. In its upper part, the bolt 32 is
provided with an inclined groove 32a, in which is inserted a pin
34a of a cover plate 34, which when the bolt is moved upwards is
swung to a position in which it covers the keyhole 8. This thus
occurs when the door handle is disengaged from the square bar
10.
The follower 31 works together with a bolt hook 38 pivoted on the
bolt and actuated by a spring 37, having a hook member 38a, which
in the disengagement position shown in FIG. 4 enters into a recess
31b provided in the follower 31. The bolt hook 38 is also provided
with a projection 38b which is guided in a recess 39a in a cover
plate (not shown) applied to the rear of the escutcheon
housing.
In the position shown in FIG. 4, the projection 38b is inserted in
a sideways-directed section of the recess 39a.
The said cover plate (not shown) is also provided with recesses for
guidance of the driver 33 as this moves.
The thickened part 3a of the escutcheon housing forms, as mentioned
above, a housing for the lock cylinder of the cylinder lock. The
bottom of this housing consists in part of a retaining plate with a
section resting against the said cover plate (not shown). Also
connected to this retaining plate is a washer, which is passed
through the spindle of the door handle 4 and rests against a guide
plate 41 provided for the bolt 32.
The door handle is further provided with a shearing notch causing
it to shear off if it is subjected to excessive violence when it is
disengaged from the square bar.
Reference number 42 designates recesses for socket nuts which are
used to apply the escutcheon housing by means of screws (not shown)
which are passed through an escutcheon element (not shown) attached
to the inside of the door.
Described in FIGS. 5-7 is a modified embodiment of the locking
device largely intended to be put into use as a hotel lock. The
most important difference as against the previously described
embodiment is that the dead bolt from the outside of the door is
intended to be actuated by a cylinder lock mechanism. For this
purpose, the escutcheon housing 3' is provided with a recess 45 for
a lock cylinder 46 instead of the keyhole 8 shown in FIG. 1. For
actuation of the dead bolt from the inside of the door, use is made
in this embodiment of a handle 61, connected with a square axle 48
passing through the lock case 2'. The handle 61 is carried in an
escutcheon housing 60 fitted on the inside of the door, which
escutcheon housing contains certain operating means which will be
described more closely below and with reference to FIGS. 8-10.
In accordance with what has been explained above only the hotel
management will have access to the key belonging to the lock
cylinder 46. This lock cylinder will thus normally not be operable
from the outside. The escutcheon housing 3' is therefore provided
with a recess for a cover plate 51, which normally hides the lock
cylinder. Shown in FIG. 5 is the cover plate provided with a
number, appropriately the corresponding room number, but the cover
plate 51 can naturally be marked in some other way or be without
marking if so desired. The escutcheon housing 3' is also provided
with an indication window 52, in which an indication means 56, 57,
cooperating with the dead bolt, marks when the door is latched from
the inside. This serves at the same time as a signal to examplewise
members of the hotel staff, who cannot gain entry to the room by
actuation of the lower lock cylinder 9' by means of, for instance,
a master key fitting all the doors.
If, on the other hand, the hotel management examplewise wishes to
prevent anyone from gaining entry to the hotel room concerned, the
cover plate 51 is removed, whereafter the dead bolt is latched by
means of a special key which fits the lock cylinder 46.
In FIGS. 6 and 7 it is shown how the interior of the escutcheon
member 3' is elaborated. In relation to the embodiments shown in
FIGS. 3 and 4, the difference is that there is no need of the
special cover plate for an upper keyhole since there is none. In
this embodiment the follower 31' is provided with teeth 31'a, which
mesh with corresponding teeth on a displaceable bolt slide 32',
which in its lower part has a driver member 33' which when the
follower is turned is brought into or, as applicable, out of a
recess in the square bar 10 in essentially the same manner as
described in connection with FIGS. 3 and 4.
The follower 31' is retained in its two end positions by a torsion
spring 50'. Reference numeral 54' designates a guide plate for the
driver member 33'. Reference numeral 55' designates a rear cover
plate for the escutcheon housing.
Illustrated in FIGS. 8-10 is the escutcheon housing 60 located on
the inside of the door and its associated parts. The escutcheon
housing is provided with a handle 61, which in the manner described
below allows actuation of the lock mechanisms of both the dead bolt
and the spring bolt. On the back of the escutcheon housing is a
baseplate 62, which is secured to the escutcheon housing on the
outside of the door by means of four screws 63.
The upper square axle 48 constitutes an operating axle or spindle
for the lock mechanism for the dead bolt 7' shown in FIG. 11.
Located on the axle 48 is a follower 65 provided with a roller or
pin 66, which actuates an intermediate arm 67, the central part of
which is supported in a pin 68. In its lower end, the intermediate
arm 67 has a toothed segment 69 which meshes with a corresponding
toothed segment 70 on the lower square bar 10'. The intermediate
arm 67 is swingable by the influence of a spring 71, the lower
element of which interacts with a catch member 72, the purpose of
which is to hold the follower 67 in either rest position.
Upon turning of the handle 61, so that the square axle shown in
FIG. 9 turns clockwise, the dead lock mechanism shown in FIG. 11 is
actuated so that the dead bolt 7' takes up the locked position.
Upon turning of the handle 61 in the opposite direction from the
locked position, the dead bolt 7' is initially moved to the release
position, after which further turning of the handle causes the
follower 65, via the intermediate arm 67 and the two toothed
segments 69 and 70, to actuate the lower square bar 10' so that the
spring bolt takes up the release position.
It is seen from FIG. 11 that the movement of the dead bolt 7' via a
toothed segment 80 is controlled by a toothed cylinder follower 81,
which is actuated either by a lock cylinder 46 (FIG. 7) or from the
opposite side by a handle 61 via the square bar 48.
The toothed segment 80 has a pin 80a which engages in a groove 7'a
in the rear end of the dead bolt 7'. The movements of the dead bolt
take place through the influence of a spring 83.
In FIG. 11 only the upper part of the lock case 2' is shown. The
lower part provided with the spring bolt can be elaborated in
largely the manner illustrated in FIG. 2 or be designed in some
other manner depending on the actual requirements. The latch member
6 can thus instead for example be located nearer the spring bolt
5.
FIG. 12 illustrates a modification of the embodiment according to
FIG. 7. In this embodiment, the dead bolt is arranged to be
actuated from both the inside and the outside by a separate lock
cylinder 46' and 90', respectively. In this embodiment there is no
escutcheon housing on the inside which allows actuation of the
spring bolt mechanism. Instead the latter is actuated in the normal
manner by means of a handle applied to the lower square axle. This
embodiment is especially intended for use for outside doors of
houses and apartments. Both the upper lock cylinders can be
operable by the same key, but it is naturally possible if so
desired to adapt the lock cylinder positioned in the escutcheon
housing to fit the said key also. The locking cylinder 9 may
preferably be designed as a master key cylinder the key of which,
however, does not fit into the rest of the cylinders 46', 90'.
Shown in FIG. 13 is the upper part of an outer escutcheon housing
3", which is suitable for use with a locking device according to
FIG. 12. This escutcheon housing differs from that shown in FIG. 5
in that there is no indication window, in addition to which the
housing lacks means for application of a cover plate over the upper
lock cylinder. Otherwise, the two escutcheon housings can largely
be held to correspond to each other.
In all the embodiments dealt with above the dead bolt and
appurtenant lock mechanism are located uppermost in the lock case.
As an alternative, the spring bolt with its lock mechanism can
instead be located uppermost. Several other conceivable variations
are possible within the scope of the invention. The latch pawl 6 of
the spring bolt, for example, can interact with a differently
elaborated, automatically latching lock mechanism than in the
embodiment shown. The latch pawl 6 can thus be located higher up,
as in FIG. 2, i.e., closer to the spring bolt 5, and the latch pawl
can also be located between the spring bolt 5 and the dead bolt 7.
In a further modification, the lock cylinder 9 or 9' is only partly
inserted in the escutcheon housing, which can then in order to
further limit the part of the escutcheon plate protruding from the
door be recessed in the door.
The invention also offers many other modifications within the scope
of its fundamental concept as defined in the appended claims.
* * * * *