Importance

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Abstract

A locking device for a sash window having a window sash moveably mounted in a window frame, the locking device comprising a body and a locking element moveable between an unlocked position and a locked position. The device includes a sensor system to detect whether the window sash is in a closed position in the window frame and also to detect whether the locking element is in the locked position. The device includes a first sensor comprising a first lock sensor component mounted for movement with the locking element and a second lock sensor component mounted to the body. The device also includes a second sensor comprising a first window sensor component arranged to be mounted to the sash window and a second window sensor component mounted to the body. The device includes a detent mechanism which acts with the positional arrangement of the sensors to provide a reliable system.

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First Claim