Note: Descriptions are shown in the official language in which they were submitted.
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WINDOW LOCK
BACKGROUND OF THE INVENTION
This invention relates to a window lock of the type comprising
a lock body for mounting on a window frame and a lock handle mounted on
the lock body for pivotal movement relative thereto, the lock handle
including an actuator element which extends through a hollow interior of the
lock body for engaging an element of the window to hold the window in
locked position against the window frame.
Many different designs and arrangements of lock handle of this
type have been provided and it is previously known to provide engagement
of the lock handle with the window in a number of different ways. In one
technique, the lock handle includes simply a hook shaped element which
engages over a suitable abutment on the window. In other arrangements it
is known to provide on the lock handle an actuator which operates
movement of a bar longitudinally of the window frame with the bar acting to
engage an abutment on the window. The bar can simply engage a single
element on the window frame or it can engage a number of longitudinally
spaced abutments on the window frame to provide locking at different
positions along the window.
The locking action is of course provided in order to hold the
window tight against seals to prevent penetration of air and in addition the
locking effect is provided for security purposes to prevent an intruder
forcing the window open.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide an improved
arrangement of window lock of the above type.
According to a first aspect of the invention there is provided a
locking assembly for use with a window construction comprising a window
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frame member and a window member movable relative to the window frame
member, the locking assembly being arranged for cooperation with a lock
element of the window member for locking the window member in a closed
position against the window frame member;
the locking assembly comprising a lock body arranged for
mounting on the window frame member at an opening therein and a lock
handle mounted for pivotal movement relative to the lock body;
the lock body including a base portion arranged to be engaged
in use onto a surface of the window frame member, a raised portion for
projecting outwardly from the surface and a hollow interior of the raised
portion;
the lock handle including a mounting portion, means mounting
the mounting portion on the raised portion for pivotal movement relative
thereto about an axis transverse to the raised portion and the handle, which
axis in use is parallel to the surface, from a first lock position in a lifting
movement away from the lock body to a raised release position, and a
manually graspable portion extending from said mounting portion to a
position in which at least one finger of a hand of a user can engage an
under surface of the manually graspable portion for pulling the handle out of
said lock position into said release position;
actuator means mounted on the lock handle and extending
through the hollow interior of the raised portion and arranged so as in use to
extend through said opening in the window frame member for engaging said
lock element to lock the window member in a closed position;
and latch means for releasably latching the lock handle in the
lock position, the latch means comprising an abutment surface on the lock
body and a latch trigger mounted on the lock handle at the under surface of
the manually graspable portion so as to be graspable simultaneously with
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grasping of the manually graspable portion for pivotal movement of the latch
trigger relative to the lock handle;
such that the latch trigger is manually movable from a latch
position, in which a hook portion on the latch trigger engages under the
5 abutment surface to prevent said lifting movement of the lock handle away
from the lock body, away from the abutment surface to a release position in
which the lock handle is released.
According to a second aspect of the invention there is provided
a locking assembly for use with a window construction comprising a
10 window frame member and a window member movable relative to the
window frame member, the locking assembly being arranged for cooperation
with a lock element of the window member for locking the window member
in a closed position against the window frame member;
the locking assembly comprising a lock body arranged for
15 mounting on the window frame member at an opening therein and a lock
handle mounted for pivotal movement relative to the lock body;
the lock body including a base portion arranged so as in use to
be engaged onto a surface of the window frame member, a raised portion
arranged so as in use to project outwardly from the surface and a hollow
20 interior of the raised portion;
the lock handle including a mounting portion, pivot mounting
means mounting the mounting portion at a forward end of the lock handle
on a forward end of the raised portion for pivotal movement relative thereto
about an axis transverse to the raised portion and the handle, which axis in
25 use is parallel to the surface, from a first lock position to a raised release
position, and a manually graspable portion at a rearward end of the lock
handle extending from said mounting portion to a position in which at least
one finger of a hand of a user can engage an under surface of the manually
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graspable portion for pulling the handle out of said lock position in a
direction which in use is away from said surface of the window frame into
said release position;
actuator means mounted on the lock handle and extending
5 through the hollow interior of the raised portion so that in use it extends
through said opening in the window frame member for engaging said lock
element to lock the window in a closed position;
wherein the raised portion comprises a pair of parallel side walls
extending arranged so as in use to extend substantially at right angles to the~0 surface of the window frame and defining sides of the raised portion;
wherein the raised portion defines a substantially rectangular
upper face thereof, formed by upper edges of the side walls, Iying
substantially in a plane which in use is raised from and substantially parallel
to the surface of the window frame;
wherein the mounting portion of the lock handle comprises a
substantially planar plate member, which in the lock position, substantially
covers the upper face and is substantially coplanar therewith;
wherein the plate member is substantially rectangular and
substantially coextensive with the rectangular upper face defined by said~0 side walls;
wherein the raised portion includes an end wall at the forward
end thereof substantially at right angles to and interconnecting the side
walls;
and wherein the mounting portion of the lock handle includes a
25 transverse recess at the forward end and breaking out onto a front face
thereof parallel to the pivot axis underneath the plate member thereof and
extending around the pivot mounting means and receiving the end wall
therein in the raised release position of the lock handle.
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One embodiment of the invention will now be described in
conjunction with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an isometric view of a window lock according to the
present invention.
Figure 2 is a side elevational view of the lock of Figure 1.
Figure 3 is a top plan view of the lock of Figure 1.
Figure 4 is a bottom plan view of the lock of Figure 1.
Figure 5 is an end elevational view of the lock of Figure 1.
Figure 6 is a second end elevational view of the lock of Figure
1.
Figure 7 is a longitudinal cross sectional view of the lock of
Figure 1 in the locked position shown in Figure 1 and showing the lock
mounted on a window frame engaging a window in a locking action.
Figure 8 is a similar longitudinal cross sectional view to that of
Figure 7 showing the lock handle in a partly raised release position.
In the drawings like characters of reference indicate
corresponding parts in the different figures.
DETAILED DESCRIPTION
The window lock as illustrated particularly in Figures 1, 7 and 8
comprises a lock body 10, a lock handle 11, an actuator 12, and a trigger
latch 13. As is well known to one skilled in the art, the lock body is
mounted on a window frame member 1 so that the actuator 1 passes
through an opening 2 in the window frame member and engages a lock
element schematically shown at 3 of a window member 4. In general terms
the lock handle is pivotally mounted on the lock body for movement from a
lowered lock position as shown in Figure 7 in which the actuator 12
engages an element of the window to effect locking of the window against
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the window frame to a raised release position as shown in Figure 8 in which
the actuator 12 is moved to release-the element of the window for opening
of the window away from the frame and the window lock. For convenience
of illustration the position shown in Figure 8 is moved only partly into the
release position and it will be appreciated that the lock handle can pivot
further in the counterclockwise direction to a position approximately at 90~
to the front face of the lock body.
The lock body 10 comprises a base plate 14 which has an
under surface 15 for engaging an outer surface of the window frame. From
the under surface 15 projects a rectangular housing portion 16 with parallel
side walls 17 and end walls 18. The side walls are of a spacing less than
the width of the rectangular base plate 14 so as to define a shoulder of the
under surface 15 which engages the surface of the window frame with the
housing portion 16 projecting into a recess or opening in the window frame.
Each end wall 18 is of increased thickness so as to receive a
screw opening 19 by which the housing portion is attached to the window
frame. The housing portion as best shown in Figure 4 has an open bottom
20 exposed at the under surface thereof through which the actuator 12
passes.
On top of the base plate 15 is provided a raised portion 21
defined by two parallel side walls 22 and an end wall 23. The side walls 22
are parallel and spaced by the width of the base plate 14 so that the outside
surface of the side walls 22 are flush with the side edges of the base plate
14. The length of the side wall 22 is less than the length of the base plate
so that there is a bare portion 14A of the base plate which projects beyond
an adjacent end 24 of the raised portion. Both ends of the raised portion are
inclined from a top edge 25 of the raised portion downwardly and outwardly
to the plane of the top surface of the base plate 14.
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The raised portion thus defines at the top edge 25 a plane
parallel to the base plate which includes the top edges of the side walls 22
and the top edge of the end wall 23. Between the side walls and the end
walls is defined a hollow interior which communicates with the hollow
5 interior of the housing portion 16. The top surface of the raised portion is
rectangular and of the same width as the base plate 14 but of reduced
length relative to the base plate 14.
The lock body further includes a transverse web element 26
which extends across between the side walls 22 at the level of the base
plate 14. The web element 26 includes a first portion 27 parallel to the
base plate and extending only part way along the hollow interior from a first
end 28 to a second end 29, the latter being spaced from one end wall 18 of
the housing portion. At the end 29 is provided a hook element 30 which
extends upwardly in an arch shape to a downwardly facing abutment
surface 31 positioned beyond the end 29 of the first portion 27. The
abutment surface 31 is also spaced upwardly from a top surface 32 of the
end wall 18 so as to leave a space therebetween for receiving a hook
portion of the trigger latch 13 as described hereinafter.
The web element 26 further includes a pin 33 projecting
20 downwardly into the hollow interior of the housing portion to a position
adjacent to but spaced from a bottqm surface 34 of the housing portion
which lies parallel to the base plate 14 and to the top surface 25 of the
raised portion. The pin 33 carries a rubber or resilient sealing member 35.
The sealing member 35 has a width equal to the width of the interior of the
25 housing portion and extends partly along the interior of the housing portion
from an end 36 at one end wall 18 of the housing portion to a second end
37 spaced beyond the end 28 of the web element 26. Between the end 28
of the web element and the end 37 of the resilient sealing member, the
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resilient sealing member decreases in thickness defining a curved upper
surface 38. For convenience of illustration the resilient sealing member 35
has been omitted from Figure 4 but the position of the end 37 is illustrated
in dotted line.
The lock handle 11 comprises a plate portion 40 which is
generally rectangular of a width equal to the width of the upper face 25 of
the raised portion and a length equal to the length of the upper face 25 of
the raised portion. Thus the handle plate 40 includes a forward end 41
which follows the line of the end wall 23 as best shown in Fi~ure 7. Thus
the end face 41 is chamfered and is inclined upwardly and longitudinally
toward the outer or lower end of the handle. The plate 40 includes side
walls 42 which are parallel and lie in a common plane with the sides 22 of
the raised portion as best shown in Figures 5 and 6. The thickness of the
plate 40 gradually increases from the end face 41 toward the other end of
the raised portion 21. This forms a top surface 43 of the plate 40 which
gradually increases in height or spacing away from the top surface 25 of the
raised portion 21 thus gradually merging into a manually graspable portion
44 of the lock handle. The manually graspable portion 44 is generally arch
shaped so that it includes a top surface 45 which gradually increases in
height from the plate 40 outwardly beyond the end of the plate and turns
downwardly in a curved nose section 46 at a position beyond an end 47 of
the plate 40. This leaves an area underneath the graspable portion 44 in
which one or more fingers of the user can be inserted in the area between
the end of the raised portion 21 and the underside of the manually graspable
portion 44.
The manually graspable portion includes a recess 48 in the
underside defining a top surface 49 of the recess and a pair of side legs 50
of the recess. The recess is thus generally U-shaped in transverse cross
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section with the sides 50 generally parallel and contiguous with the sides 42
of the plate.
The lock handle further includes a pivot portion 51 mounted on
an underside of the plate 40 and extending into the hollow interior of the
5 raised portion of the lock body. The pivot portion 51 has a width
substantially equal to the width of the interior of the raised portion so that
sides of the pivot portion are arranged in a sliding fit with the inside surfaceof the raised portion. The pivot portion 51 includes at one end a cylindrical
opening 52 for receiving a pivot pin 53 passin~q through openings 54 in the
10 side walls 22 of the raised portion and defining a pivot axis 53A. This
allows the pivotal movement of the handle relative to the lock body. The
pivot portion 51 includes a bottom surface 55 which is inclined upwardly
from a lower most end 56 adjacent the pivot pin 53. The pivot portion
terminates at an end wall 57 coterminous with the end wall 47 of the plate
15 portion 40. At its rear end adjacent the end wall 57, the pivot portion is
shaped upwardly so as to clear the web 26 and particularly the hook portion
30 thereof when in the lock position shown in Figure 7.
A rectangular projection 58 is provided on the under surface 55
of the pivot portion and extends downwardly therefrom. The projection 58
20 is recessed on all sides relative to the under surface 55 to define a shoulder
therearound as shown in Figure 4. Around the projection 58 is provided a
rectangular 0 ring 59. The 0 ring is rectangular in cross section of the body
of the 0 ring as shown and is also rectangular in plan view so as to
surround the rectangular outer surface of the projection 58. For
25 convenience of illustration the 0 ring is omitted from Figure 4. The 0 ring
as best shown in Figure 7 engages an under surface 60 of the front wall 23
of the lock body in sealing relation and also the 0 ring engages the end 28
of the web 26 in sealing relation. In the locked position, therefore, the 0
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ring acts to seal around the projection 58 to prevent the pénetration of air
through the hollow interior of the housing portion 17, around the lock
handle and out through the front face 25 of the raised portion.
On the underside of the projection 58 is mounted the actuator
12. In the embodiment shown, the actuator 12 is formed as a separate
element fastened onto the projection 58 by pins 61. In an alternative
arrangement (not shown) the actuator 12 is formed as part of the lock
handle as an integral element cast simultaneously from a suitable rigid
material. The shape of the actuator below the housing portion is entirely
optional and one simple example is shown. It will be appreciated that the
shape of the actuator will vary depending upon the device to be actuated.
However the upper part of the actuator as indicated at 62 is shaped to
receive in the hollow interior of the housing portion and includes an upper
face 63 larger than the projection 58 so as to retain the O ring 59 in place.
One end of the upper portion 62 as indicated at 64 just clears the end 28 of
the web. An under surface portion of the end 64 as indicated at 65 is
curved so as to engage the upper curved portion 38 of the sealing member
35 in a sealing action again to assist in preventing the penetration of air
around the web 26.
The trigger latch 13 is mounted in the recess 48 on a
transverse pivot pin 66 which passes through the side walls 50 of the
recess 48. The trigger includes a spring finger 67 which projects outwardly
from a position adjacent the pivot pin 66 along the upper wall 49 of the
recess 48 into engagement with the upper wall so as to spring bias the
trigger latch in a clockwise direction around the pin 66. The trigger latch
includes a trigger projection 68 extending from the pivot pin 66 across the
bottom of the recess 48 to a position adjacent but spaced inwardly from the
nose 46. The upper surface of the trigger portion is spaced from the
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surface 49 so that the trigger can be pulled upwardly into the recess and
can rotate in a counterclockwise direction about the pin 66 against the bias
of the spring 68. An under surface 69 of the trigger portion 68 is curved
downwardly and forwardly to a position adjacent the plate portion 14 and
5 defines a smooth curve which can be readily grasped by the finger or fingers
of a user reaching underneath the manually graspable portion 44 of the lock
handle. The trigger latch 13 further includes an abutment wall 70 which
engages the end wall 57 of the pivot portion to limit the clockwise
movement of the trigger latch about the pin 66. In the normal position of
10 the trigger latch, therefore, it is rotated in the full extent in the clockwise
direction until the wall 70 engages the end wall 57 as shown in Figures 7
and 8. However it will be appreciated that the trigger latch can be rotated
by finger pressure in the counter clockwise direction to move the wall 70
away from the wall 57. Underneath the wall 70 is provided a hook portion
15 71 which forms an end of the lower surface 69 and engages the end wall
31 of the hook portion 30 of the web 26.
In the position shown in Figure 7, therefore, the latch trigger 13
is held in position engaging the web so as to prevent movement of the
handle into the release position until the hook 71 is moved away from the
20 hook portion 31 of the web. This only occurs if the operator grasps the
trigger latch at the same time as grasping the manually graspable portion of
the lock handle. It is impossible therefore for an intended intruder to move
the lock handle to the release position by applying force on the actuator 12.
However from the point of view of the user, the trigger latch
25 13 is grasped and moved simply as a part of the action of grasping the
manually graspable portion of the lock handle. When the finger of the user
is engaged underneath the under surface of the manually graspable portion
44 it automatically engages the under surface of the trigger, pulls the trigger
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into the recess and releases the latch. When pushing the lock handle into
the lock position, the shape of the under surface 69 at the hook 71 causes
the trigger to be rotated in the counter clockwise direction as it passes over
the upper surface of the hook portion 30 of the web to automatically move
into the latch position.
The pivot portion 51 includes a recess 75 over the cylindrical
opening 52 and underneath the plate portion 40. This recess is hidden
under the plate portion 40 in the lock position as shown in Figure 7 but
allows the plate portion 40 to engage over the front wall 23 in the open
release position of the lock handle. The bottom surface of the recess 75
follows a circle around the pivot pin 53 so that this surface just clears the
inside surface of the end wall 23 in the action of moving from the locked
position shown in Figure 7 through the partly open position shown in Figure
8 to a fully open position at right angles to the lock body.
This shape and arrangement of the lock handle allows the lock
handle to include the plate portion 40 which covers the rectangular upper
surface 25 of the raised portion. This provides an attractive appearance of
the handle so that it effectively provides a cover for the rectangular upper
surface 25.
The arrangement of Figures 1 through 8 is intended for use
with a window locking system which includes a bar slidable longitudinally of
the window to effect locking at a number of different positions since such a
bar is possibly engageable by an intended intruder who could then release
the lock handle by applying sufficient force upon the bar and therefore the
actuator 12.
Since various modifications can be made in my invention as
herein above described, and many apparently widely different embodiments
of same made within the spirit and scope of the claims without departing
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from such spirit and scope, it is intended that all matter contained in the
accompanying specification shall be interpreted as illustrative only and not in
a limiting sense.
