Security window guard

Claim 1

In a security guard for windows having a rigid metal grid assembly mounted on the window frame and covering the window opening, the improvement wherein said security guard includes a fixed rectangular frame which extends entirely about the window frame to the exterior of the window opening, said fixed frame including generally opposed horizontal top and bottom frame members and opposed vertically extending side frame members, each of the opposed members of at least one of said opposed horizontal top and bottom frame members and said opposed vertically extending side frame members including orifice means in the inwardly directed surface thereof; a rigid open rectangular frame movably mounted in said fixed frame and including opposed top and bottom beams and opposed side beams, said rigid open rectangular frame being inset within said fixed frame with said beams thereof normally disposed in closely adjacent parallel relation to corresponding members of said fixed frame and with the exterior surface of said beams thereof non-extendant beyond the exterior surface of corresponding members of said fixed frame, each of the opposed beams of at least one of said opposed top and bottom beams and opposed side beams including keeper means, said orifice means of said fixed rectangular frame and said keeper means of said rigid open rectangular frame being provided on respectively corresponding members thereof and positioned so that said keeper means of said rigid rectangular frame cooperatively engages with said orifice means of the corresponding member of said fixed frame, said keeper means comprising key actuated blinded mortice lock means including bolt means adapted to project into said orifice means of the member of said fixed frame corresponding to the member of said rigid open rectangular frame having the same in a manner to lock said movable frame in said fixed frame, the key receiving face of said key actuated blinded mortice lock means being positioned on the inner side of said opposed beam having the same and opening toward the window opening about which said security guard is provided; and a metal grid rigidly mounted within the opening of said movable frame and covering the window thereof in an outwardly spaced relation thereto.