Window lock

A window construction comprising:

• a window frame member;
• a window member movable relative to the window frame member;
• and a lock for locking the window member in a closed position against the window frame member;
• the lock including a lock element for cooperation with the window member, a lock body mounted 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 engaged onto a surface of the window frame member, a raised portion projecting outwardly from the surface and a hollow 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 and 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 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 mounted on the lock handle and extending through the hollow interior of the raised portion and 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 substantially at right angles to the 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, lying substantially in a plane 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 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 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.

A window construction comprising:

• a window frame member;
• a window member movable relative to the window frame member;
• and a lock for locking the window member in a closed position against the window frame member;
• the lock including a lock keeper element mounted on the window member, a lock body mounted on the window frame member at an opening in a surface of the window frame member and a lock handle mounted for pivotal movement relative to the lock body;
• the lock body including a base portion engaged onto the surface of the window frame member, a raised portion projecting outwardly from the surface and a hollow interior of the raised portion;
• the surface of the window frame member being arranged relative to the window member such that the window member moves in an opening and closing direction substantially at right angles to the surface;
• the lock handle including;
• a mounting portion;
• means mounting the mounting portion on the raised portion for pivotal movement relative thereto about a pivot axis, which axis is transverse to the raised portion and is parallel to the surface, such that the lock handle is movable from a first lock position to a raised release position;
• and 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 engage 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 window frame member 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 member in a closed position;
• said actuator arm 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 member 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 said opening end closing direction at right angles to the surface of the window frame to open the window member relative to the window frame member 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 interengaged 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.

A window construction comprising:

• a window frame member;
• a window member movable relative to the window frame member;
• and a lock for locking the window member in a closed position against the window frame member;
• the lock including a lock element for cooperation with the window member, a lock body mounted on the window frame member at an opening therein and a lock handle mounted for pivotal movement relative to the lock body;
• the lock element comprising an elongate bar mounted on the window frame member 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 for movement therewith and a plurality of keeper elements mounted on the window member 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 member into a closed position;
• the lock body including a base portion engaged onto a surface of the window frame member, 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 raised portion for pivotal movement relative thereto about an axis transverse to the raised portion 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 mounted on the lock handle and extending through the hollow interior of the raised portion and through said opening in the window frame member 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 member 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 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.