US 4,428,154 AGranted

Window safety lock

AssigneeDisco Aluminum Products Co., Inc.

InventorDavid M. Rinehart

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Abstract

A safety lock for a window mounted for pivotal movement about a centrally disposed vertical axis embodies a lock assembly housing mounted on the window sill intermediate the vertical axis and a window jamb. An elongated vertically extending locking member mounted on the lock assembly housing is movable selectively to a locked position with its upper end adjacent the housing and to an unlocked position with its upper end spaced from the housing. A latch assembly housing is mounted on the lower portion of the window intermediate the vertical axis and a vertical side frame member. A connector arm is pivotally connected at one end to a lower portion of the latch assembly housing with its other end engaging the locking member to permit pivotal movement of the window selectively to a closed position and to a limited open position. The locking member is moved to its unlocked position by a release element which permits the connector arm to be disengaged from the locking member and permits the window to pivot toward a reversed position.

A safety lock for a window unit having a sash mounted for pivotal movement about a centrally disposed vertical axis within a sash opening defined by horizontal upper and lower frame members and spaced apart vertical side frame members,

(a) an elongated, horizontal lock assembly housing mounted on the lower frame member intermediate said vertical axis and one of said side frame members with an elongated, vertically extending locking member mounted for vertical movement relative to said housing selectively to an unlocked position with an upper portion of said locking member being spaced from the upper surface of said housing and to a locked position with said upper portion being adjacent said upper surface of said housing,
(b) a lock assembly within said lock assembly housing operatively connected to a lower portion of said locking member,
(c) an elongated, horizontal latch assembly housing carried by a lower portion of said sash intermediate said vertical axis and said one of said side frame members,
(d) an elongated, horizontal connector arm pivotally connected at one end to a lower portion of said latch assembly housing with its other end engaging said locking member to permit pivotal movement of said sash relative to said sash opening selectively to a closed position and to a limited open position,
(e) stop means carried by said lock assembly housing and engaging said lock assembly to positively retain said other end of said connector arm in engagement with said locking member while said sash is in said closed position and in said limited open position,
(f) a release element having a portion thereof adapted to engage said lock assembly and move said locking member toward its unlocked position to permit said other end of said connector arm to engage and disengage said locking member so that said sash is adapted for free pivotal movement beyond said limited open position while said locking member is disengaged, and
(g) resilient means within said lock assembly housing urging said locking member toward its locked position.

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Abstract

Claims14