Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
2187606
WINDOW LOCK
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.
BACKGROUND OF THE INVENTION
Many different dlesigns 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 wiindow 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 may 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.
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According to they first aspect of the invention there is provided a
window lock for use with a window construction including a window frame and
a window movable relative to the window frame, the window lock comprising:
a lock element four cooperation with the window;
a lock body arranged to be mounted on the window frame at an
opening therein;
a lock handle mounted for pivotal movement relative to the lock
body;
the lock element comprising an elongate bar arranged to be
mounted on the window frame for sliding movement therealong in a direction
longitudinally of the length of the bar, a plurality of abutment members
arranged to be mounted on the bar at spaced positions therealong for
movement therewith and a plurality of keeper elements arranged to be mounted
on the window each for cooperation with a respective one of the abutment
members such that movement of the bar along its length causes the abutment
members to engage the keeper elements to pull the window into a closed
position;
the lock body including a base portion arranged to be engaged
onto a surface of the window frame, a raised portion arranged to project
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 lock body for pivotal movement relative thereto about
an axis transverse to the lock body and the handle and parallel to the surface
from a first lock position 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
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2187606
graspable portion for pulling the handle out of said lock position away from
said
surface of the window frame into said release position;
and actuator mE:ans attached to the lock handle and extending
through the hollow interior of the raised portion so as to extend through said
opening in the window frame for engaging an abutment portion on said
elongate bar such that pivotal movement of the handle portion causes
movement of the actuator means to move the bar to lock the window in the
closed position;
the actuator means including:
a rigid arm attached to the lock handle such that an outer end
thereof moves in an arc about the transverse axis as the lock handle moves
between the lock position and the release position;
and a double pivot link pivotally connected at one end to the outer
end of the arm and at an opposed end to an end of the bar such that the bar
can thus move in a straight lime along its length while the outer end of the
arm
moves in its arc.
According to a second aspect of the invention there is provided a
window lock for use with a window construction including a window frame and
a window movable relative to the window frame, the window lock comprising:
a lock element for cooperation with the window;
a lock body arranged to be mounted on the window frame at an
opening therein;
a lock handle mounted for pivotal movement relative to the lock
body;
the lock element comprising an elongate bar arranged to be
mounted on the window frame for sliding movement therealong in a direction
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longitudinally of the length of the bar, a plurality of abutment members
arranged to be mounted on the bar at spaced positions therealong for
movement therewith and a plurality of keeper elements arranged to be mounted
on the window each for cooperation with a respective one of the abutment
members such that movement of the bar along its length causes the abutment
members to engage the keeper elements to pull the window into a closed
position;
the lock body including a base portion arranged to be engaged
onto a surface of the window frame, a raised portion arranged to project
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 lock body for pivotal movement relative thereto about
an axis transverse to the lock body and the handle and parallel to the surface
from a first lock position 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 away from
said
surface of the window frame into said release position;
actuator means attached to the lock handle and extending through
the hollow interior of the raised portion so as to extend through said opening
in
the window frame for engaging an abutment portion on said elongate bar such
that pivotal movement of the handle portion causes movement of the actuator
means to move the bar to lock the window in the closed position;
the actuator means including:
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a rigid arm attached to the lock handle such that an auter end
thereof moves in an arc about the transverse axis as the lock handle moves
between the lock position and the release position;
and a double pivot link pivotally connected at one end to the outer
5 end of the arm and at an opposed end to an end of the bar such that the bar
can thus move in a straight line along its length while the outer end of the
arm
moves in its arc;
and manually operable latch means having a first portion on the
lock body and a second portion on the lock handle which first and second
portions can be inter-engaged for latching the lock handle in the first lock
position, the latch means being manually operable so as to release engagement
between the first and second portions for releasing the lock handle for
movement from the lock position.
Preferably the first and second portions of the latch means
comprise respectively an abul:ment surface on the lock body facing toward the
surface of the window frame 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 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 an abutment
element on the latch trigger engages the abutment surface, away from the
abutment surface to a release position in which the lock handle is released.
Preferably the manually graspable portion comprises an arch
shaped section arranged at one end of the mounting portion and wherein the
trigger is arranged underneath the arch shaped portion so as to face the
surface of the window frame.
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Preferably the rnanually graspable portion includes a generally
channel shaped section having an transverse surface facing outwardly of said
surface and a pair of depending side legs extending toward said surface, the
legs defining a recess therebE~tween and wherein the latch member is mounted
in the recess.
Preferably the trigger is spring biased into a latching position and
is movable manually against t'~he spring bias into a release position.
Preferably the trigger is mounted on the lock handle and includes a
hook portion thereon defining said abutment element and wherein the lock
body includes a pair of upstanding side walls of the raised portion defining
the
hollow interior between the raised side walls and wherein the lock body
includes a transverse web extending across between the side walls and
defining said abutment surface for engagement with said hook portion.
Preferably there is provided a separate resilient sealing member
mounted on said transverse web for engaging the lock handle in sealing
relation
therewith.
Preferably the lock handle includes a resilient 0-ring surrounding
the actuator means, the O-ring being substantially rectangular in plan view
and
being arranged to engage elements of the lock body within the hollow interior
thereof in sealing relation therewith.
Preferably the raised portion defines an upper face thereof lying
substantially in a plane raisE;d from the surface of the window frame and
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, the manually graspable portion
of
the lock handle being provided at one end of the plate member so as to project
X187606
beyond an adjacent end of the raised portion and wherein said pivot mounting
means is arranged at an end of the lock handle opposite to the manually
graspable portion.
Preferably the plane of the raised portion is arranged such that in
use it is substantially parallel to the surface of the window frame.
Preferably the raised portion comprises a pair of parallel side walls
arranged so as in use to extend substantially at right angles to the surface
of
the window frame and defining sides of the raised portion such that the upper
face of the raised portion is substantially rectangular and wherein the plate
member is substantially rectangular and substantially coextensive with the
rectangular face defined by said side walls.
Preferably the raised portion includes an end wall substantially at
right angles to the side walls at the end thereof adjacent said pivot mounting
means and wherein the mounting portion of the lock handle includes a
transverse recess parallel to the pivot axis underneath the plate member
thereof
at the pivot mounting means for engaging over the end wall in the raised
release position of the lock handle.
Preferably the manually graspable portion comprises a generally
arch shaped member at the end of the plate member and defining an arch
shaped upper surface raised upwardly from the plate member.
According to a third aspect of the invention there is provided a
window lock for use with a window construction including a window frame, a
window movable relative to the window frame and a lock keeper element
mounted on the window, the window lock comprising:
$ 218606
a lock body arranged for mounting on the window frame at an
opening in a surface of the window frame and a lock handle mounted for
pivotal movement relative to t:he lock body;
the lock body including a base portion arranged to be engaged
onto the surface of the window frame, a raised portion arranged to project
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 lock body for pivotal
movement relative thereto about a pivot axis, which axis is transverse to the
lock body and is parallel to the surface, such that the lock handle is movable
from a first lock position to a raised release position;
a manually graspable portion extending from said mounting
portion, said manually graspable portion being arranged such that, in the
first
lock position of the lock handle the manually graspable portion lies
substantially
parallel to said surface and extends to a position in which at least one
finger of
a hand of a user can engac,~e an under surface of the manually graspable
portion for pulling the lock handle out of said first lock position away from
said
surface into said raised releasE: position;
an actuator arm mounted on the mounting portion of the lock
handle and arranged such that, with the lock handle in the first lock
position,
the actuator arm extends through the hollow interior of the raised portion and
through said opening in the v~rindow frame to a position which is on a side of
said surface opposite to said manually graspable portion for engaging said
lock
keeper element to lock the window in a closed position;
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said actuator arrn including a hook portion for engaging under a
surface of the lock keeper element, said hook portion being arranged such that
a point of contact of the hook portion with the surface of the lock keeper,
when the window is in the closed position, is located on a side of a plane
containing the pivot axis and at right angles to said surface of the window
frame which is opposite to the manually graspable portion and such that a
pulling force on the lock keeper element in an opening and closing direction
at
right angles to the surface of the window frame to open the window relative to
the window frame generates a tendency of the lock handle to pivot the
actuator arm and the manually graspable portion to the raised release position
thereof;
and manually operable latch means having a first portion on the
lock body and a second portion on the lock handle which first and second
portions can be inter-engaged for latching the lock handle in the first lock
position against said tendency, the latch means being manually operable so as
to release engagement between the first and second portions for releasing the
lock handle for movement from the lock position.
According to a fourth aspect of the invention there is provided a
window lock for use with a window construction including a window frame and
a window movable relative to the window frame, the window lock comprising:
a lock element for cooperation with the window;
a lock body arranged to be mounted on the window frame at an
opening therein;
a lock handle mounted for pivotal movement relative to the lock
body;
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2187606
the lock element comprising an elongate bar mounted on the
window frame for sliding movement therealong in a direction longitudinally of
the length of the bar, a plurality of abutment members mounted on the bar at
spaced positions therealong ifor movement therewith and a plurality of keeper
elements mounted on the window each for cooperation with a respective one
of the abutment members such that movement of the bar along its length
causes the abutment members to engage the keeper elements to pull the
window into a closed position;
the lock body including a base portion engaged onto a surface of
the window frame, a raised portion 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 lock body for pivotal movement relative thereto about
an axis transverse to the lock body and the handle and parallel to the surface
from a first lock position to a raised release position, and a manually
graspable
portion extending from said maunting 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 away from
said
surface of the window frame into said release position;
actuator means rnounted on the lock handle and extending through
the hollow interior of the raised portion and through said opening in the
window frame for engaging an abutment portion on said elongate bar such that
pivotal movement of the handle portion causes movement of the actuator
means to move the bar to lock the window in the closed position;
the actuator means comprising a flat disk member lying in a plane
parallel to the bar having a substantially circular operating peripheral edge
and
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the abutment portion comprising a receptacle mounted on the bar and defining
a recess receiving the disk such that pivotal movement of the disk with said
handle portion about said axis causes said longitudinal movement of the bar;
the recess having a semi-circular end portion for receiving said
circular peripheral edge therein and two parallel side edges each extending
tangentially away from a respective end of the semi-circular end portion.
BRIEF DESCRIPTION OF THE DRAWINGS
One embodiment of the invention will now be described in
conjunction with the accompanying drawings in which:
Figure 1 is an isometric view of a window lock according to the
present invention.
Figure 2 is a sides 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 boti:om 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.
Figure 9 is a longitudinal cross sectional view of the lock of Figure
1 in the locked position shown in Figure 1 and showing the lock for mounting
on the window frame (nat shown) with a lock actuator arm for directly
engaging and holding a keeper on the window (not shown).
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Figure 10 is a longitudinal cross sectional view of the lock of
Figure 1 in the locked position shown in Figure 1 and showing the lock for
mounting on a window franne (not shown) and including a locking bar for
mounting on the window frame for engaging a plurality of keepers of a window
(not shown) in a locking action.
Figure 11 is a longitudinal cross sectional view similar to that of
Figure 10 showing the lock in an open position.
Figure 12 is a cross sectional view along the lines 12-12 of Figure
10.
Figure 13 is a longitudinal cross sectional view similar to that of
Figure 10 showing a modified actuator arm.
In the drawings like characters of reference indicate corresponding
parts in the different figures.
DETAILED DESCRIPTION
The window loclk 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 ones skilled in the art, the lock body is mounted on a
window frame 1 so that the actuator 12 passes through an opening 2 in the
window frame and engages a lock element schematically shown at 3 of a
window 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 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 wiindow away from the frame and the window lock.
13
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 opE:ning in the window frame.
Each end wall 1I8 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 ass 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 downwairdly and outwardly to the plane of the top
surface
of the base plate 14.
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
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edge of the end wall 23. Between the side walls and the end walls is defined a
hollow interior which communicates with the hollow 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 elemE;nt 26 further includes a pin 33 projecting
downwardly into the hollow interior of the housing portion to a position
adjacent to but spaced from a bottom surface 34 of the housing portion which
lies parallel to the base plate 1I4 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 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 resilient sealing member
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15 21 8 7 6 0 6
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 bEat shown in Figure 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 section
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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 raised
portion of the lock body. They 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 surface of the raised
portion.
The pivot portion 51 includes at one end a cylindrical opening 52 for
receiving
a pin 53 passing through openings 54 in the side walls 22 of the raised
portion.
This allows the pivotal movernent 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 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 extendls downwardly therefrom. The projection 58 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 O ring 59. The 0 ring is rectangular in cross section of the body
of
the O ring as shown and is also rectangular in plan view so as to surround the
rectangular outer surface of the projection 58. For convenience of
illustration
the O ring is omitted from Figure 4. The O 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 O ring engages the end 28 of the web 26 in sealing
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relation. In the locked position, therefore, the 0 ring acts to seal around
the
projection 58 to prevent the penetration 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 undersides 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 Ei8 by pins 61. In an alternative arrangement
(not
showy 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 mE~mber 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
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48 to a position adjacent but spaced inwardly from the nose 46. The upper
surface of the trigger portion is spaced from the 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 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 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
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 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 13 is
grasped and moved simply as a part of the action of grasping the manually
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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 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.
Turning now to Figure 9 there is shown the same lock as
previously described and shown in detail in Figure 8 which includes the
mounting member 10, the lock handle 11 pivotal about the pin 53 on the
mounting member and including the trigger latch 13. The mounting member 10
20 21 8 7 6 ~ 8
includes the flange 15 which locates the mounting member 10 on the window
frame 1 so that the actuator '121 extends through an opening 2 in the window
frame 1 for engagement with a keeper 122 attached to the window 4.
The keeper 122 comprises an elongated mounting portion 123
with a pair of longitudinal shots 124 through which screws 125 extend for
engaging into the window 4. Elongate member 123 sits flush against a surface
of the window and provides a projecting portion 126 extending outwardly from
the mounting 123. The projecting portion defines a generally cylindrical
abutment surface 127 and an end flange 128 so as to trap a portion of the
actuator arm 121. The actuator arm 121 includes a hook element 129 which
extends away from the underside of the mounting portion 10 and then turns
generally parallel to the mounting portion 10 to define an upper surface 130
for
engaging the undersurface off the cylindrical abutment surface 127. A nose
131 is provided at the end of the hook portion.
The hook portion of the actuator arm thus projects through the
opening 2 to an underside of the window frame 1 and also projects to a side of
a plane 132 extending through the axis 133 of the pivot pin 53 which is
opposite to the handle portion 11. A pulling force on the window 4 thus will
tend to pivot the actuator arm 121 about the axis 133 and to open the handle
11 so that the trigger lock 13 is essential to prevent the handle from simply
being popped open thus releasing the hook portion of the actuator 121 from
the abutment surface 127. There is no necessity therefore for an over center
locking arrangement which causes the handle and the actuator arm to go over
center in movement to the locking position. Instead a simple movement to take
up the positions on the opposite side of the plane 132 can be accepted in view
of the presence of the trigger lock 13.
2 21 876 f?
Turning now to the arrangements shown in Figure 10, 11 and 12,
the same locking handle is shown including the mounting portion 10, the
handle portion 11 and an actuator arm 140. In this arrangement the actuator
140 is shaped similar to that: shown in Figure 8 but includes a hole 141 for
mounting of a pivotal actuator coupling 142 mounted on pivot bolts 143 to the
actuator arm 140. Thus opening and closing of the handle as shown in a
comparison of Figures 10 and 11 effects movement of the coupling 142 in a
direction parallel to the mounting portion 10 in the direction of the arrows
144
and 145. The mounting member 10 is again mounted on the window frame 1
so that the actuator 140 projects through the opening 2 in the window frame.
As shown best in Figure 12, the actuator 140 projects through into an area
between the window frame 1 and the window 4 with that area being rebated
relative to an outermost surface of the window. Within the recess is provided
a slide mounting bracket 146 which is screw fastened to the side face 147 of
the recess in the window frame and provides, with similar such slide mounting
brackets, a slide guide assembly for an elongate actuating bar 148. The bar
extends along the recess against the surface 147 so that it can slide
longitudinally in the direction of the arrows 144, 145. The bar carries a
plurality of abutment members 149, only one of which is shown in the figures
at spaced positions along the length of the bar each for co-operating with a
respective one of a plurality ~of keepers 150 carried on the window 4. Each
abutment member 149 includes a cylindrical abutment surface and an end
flange 151. Each keeper is also screw fastened to the adjacent surface 153 of
the window. Each keeper provides an inclined guide surface 154 and an
engagement with surface 15fi. These surfaces engage the abutment surface
156 of the abutment member 149 so that the inclined surface grasps the
".
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21g7fiAfi
abutment member and pulls the keeper and thus the window in toward the
window frame in a closing action. Once the abutment surface 156 slides along
the inclined portion 154, the abutment surface is retained behind the parallel
surface 155 in a locked position. It will be appreciated that along the length
of
the bar 148 is provided a plurality of similar locking arrangements defined by
abutment members and keepr:rs but these are now shown for convenience of
illustration.
The double pivot link 142 is pivoted at the pin 143 at one end and
a pin 157 at its opposed end to the end of the bar 148. The bar can thus
move in a straight line while the pin 143 moves in an arc pivoting about the
pin
53 and its pivot axis 133.
In this arrangement the bar is held against longitudinal movement
to a release position shown in Figure 11 from the locked position shown in
Figure 10 by the trigger lock. 13. The trigger lock 13 thus prevents forced
entry of the locking system simply by a person engaging and moving the bar
148 via a tool inserted into the area between the window and the window
frame. It is well known that such locking bars can be accessed and actuated.
However the locking bar is advantageous in that it provides simultaneous
locking of a plurality of abutment members so as to close a window along the
length of the window, particularly when the window has a significant length.
Turning now toy Figure 13, there is shown a yet further
arrangement which includes the bar 148, the slide brackets 146, the abutment
member 149 and the keeper 150. In this case the locking device includes the
mounting member 10, the handle 11, the trigger lock 13 and the actuator 160
pivotal about the pin 53 as previously described. In this case actuator 160 is
modified so that it includes on its end a disc 161 which is flat and has a
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circular periphery 162 around the majority of its extent with a relatively
narrow
coupling portion 163 connecting to the actuator arm itself 160. The disc 161
sits on one side surface of the bar 148 which faces away from the adjacent
surface of the window frame against which the bar slides. On the bar is
mounted an abutment member 164 which engages the disc 161 so that
movement of the disc 161 by the actuator arm 160 causes the longitudinal
movement of the bar. The bar, as previously described, moves in a direct
straight line along its length as indicated by the arrow 165 while the
actuator
arm 160 and the disc 161 pivot about the axis of the pin 53. Thus the center
of the disc 161 indicated at 166 pivots along an arc 167.
The abutment member 164 includes an abutment surface 168
having a semi-circular portion 169 centered about the center 166 and two
straight sides 170 and 171 which are parallel and are tangential to the ends
of
the semi-circular portion 169.
The differential i~n movement between the disc 161 and the bar
148 is taken up therefore by sliding movement of the disc relative to the
abutment member in a direction of the arrow 173.
In the position of the arc 167 at maximum spacing from the
mounting member 10, the disc 161 engages fully into the semi-circular portion
169. On either side of this maximum position, the disc slides in a direction
of
the arrow 173 away from the portion 169 while the sides of the disc remain in
contact with the sides 170 and 171 of the surface of the abutment member.
As the disc is circular, this sliding movement is smooth and there is
continual
contact between both sides of the disc and the respective side of the abutment
surface.
24
This coupling between the actuator arm and the abutment member
thus provides a direct coupling without the necessity for any loose pivotal
coupling elements of the type shown at 142 and yet provides an effective
smooth action of the bar.
Above the straight portions 170 and 171, the abutment surface
168 flares outwardly so as to accommodate the sides of the abutment arm 160
in the extreme positions thereof.
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 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.
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