US 5,318,333 AGranted

Device for locking and unlocking sashes in door- or window frames

AssigneeWilhelm Weidtmann GmbH & Co. KG

InventorKarl-Heinz Dreifert

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Abstract

A device which can lock a sash to and unlock a sash from a door or window frame has a composite housing which is partially recessed into the frame and receives a portion of a reciprocable plate member which is coupled to one or more motion receiving elements serving to actually lock or unlock the sash. The housing further carries a handle which is pivotable in the plane of the plate member about an axis extending at right angles to such plane, preferably through an angle of approximately 180.degree.. The plate member has one or more sliders which are reciprocable in one or more elongated grooves provided in one or more internal surfaces of the housing. The motion transmitting connection between the handle and the plate member can include a single part, such as a crank, which is non-rotatably connected to the handle and is pivoted to the plate member. Alternatively, the motion transmitting connection can comprise a crank which is non-rotatably connected with the handle and a link which is articulately connected to and forms with the crank a toggle joint. An end portion of the link is articulately connected to the plate member.

A device for actuating a mechanism for releasably securing a mobile frame to a second frame, comprising a housing including a first section and a second section, said sections having external surfaces and confronting internal surfaces;

means for fastening at least one of said sections to one side of one of the frames;
a pivot carried by said housing and defining a pivot axis at least substantially parallel to the one side of the one frame;
a handle mounted on said pivot adjacent one of said external surfaces and turnable about said axis through an angle of at least 90.degree. in a predetermined plane which is at least substantially parallel to at least one of said internal surfaces;
a plate member including a first portion movably mounted between said sections and a second portion extending outwardly from said housing through an opening provided between said sections adjacent the one side of the one frame, said plate member having a first side and a second side;
motion receiving means connected to the second portion of said plate member and to the securing mechanism;
and means for coupling the first portion of said plate member to said handle to impart to said motion receiving means a substantially linear movement in a predetermined direction in response to turning of said handle about said axis, said coupling means comprising at least one follower provided on said plate member and reciprocable in a groove provided in one of said internal surfaces adjacent one side of said plate member and extending in substantial parallelism with said direction, a crank turnable with said handle and disposed between said sections adjacent the other side of said plate member, and means for at least indirectly connecting an end portion of said crank to said plate member, said end portion of said crank being movable--in response to turning of said handle--along an arcuate path crossing said groove and disposed in a plane at least substantially parallel to the one side of the one frame.

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Abstract

Claims20