Patent GB-722029-A (GB)
Title: Improvements in and relating to safety devices for window frames and like closures
IPC: E05C17/18
Filed: 1951-11-28
Abstract: 722,029. Window fastenings; securing bolts and nuts against unauthorized removal ; stays for hinged articles. HOLDEN, H. C. R. Nov. 28, 1952 [Nov. 28, 1951; Dec. 21, 1951], Nos. 27925/51 and 29975/51. Classes 44, 65 (1) and 89 (1). [Also in Group X] A safety device for precluding or limiting movement between the fixed and movable parts of a window or between the fixed and movable parts of a fastener for a window, comprises an anchor member attached to one of the relatively movable parts, a locking member adapted to be brought into a locking position by being screwed into or on to the anchor member by a key which can be engaged in one or more holes or recesses in the locking member axially of a guard carried by the locking member, is irremovable therefrom when the locking member is engaged with the anchor member, is rotatable on the locking member and prevents the locking member from being rotated except by the key when the member has been screwed into the locking position and a member wholly or partially masking the face of the locking member in which the holes or recesses are formed. The device prevents a sash window being opened; the anchor is a screw 16, Fig. 2, having a screwthreaded bore 20, the anchor being screwed into the outer sash 10, the screw thread being engaged by a bolt 22 forming the locking member having a guard in the form of an open-ended sleeve 26 rotatably mounted on its stem and surrounding its head, the sleeve engaging the inner sash 12. In the open end of the sleeve above the bolt-head, a block 30 forming the masking member is secured either by burring over the end of the sleeve or by screwing it into the sleeve so that the bolt can only be removed by a key 50, which engages a slot in the bolthead only when the block is removed if it is screwed into place or otherwise through an aperture in the block. The device locks the catch 60 of a casement window as shown in Fig. 4 by an anchor member 78 having a leg which is fitted between the blade of the catch and the window frame and a part 80 which fits over the securing screw or nut of the catch. A bolt-locking member 84, the head of which is masked by a sleeve as in the construction described above, is screwed into the leg 78 in the path of the catch blade and prevents its movement. The part 80 may have a downwardly extending leg to which a locking arm 88 is pivoted, the free end of the arm 88 being connected to the leg 78 by the bolt 84. A device as shown in Fig. 3 may be used for locking the catch of a casement window by positioning a head 12 on an anchor member 16 on one side of the catch blade and a locking nut 44 on the other side. For locking a fanlight, the pivot of the arm 96, Fig. 6, by which the positioning of the fanlight is adjusted is replaced by an anchor bolt 102, which cooperates with a locking nut surrounded by a rotatable sleeve 106, the sleeve containing a masking member as previously described. In a modification, Fig. 8, a spring 112 is positioned between the sleeve 106 and the arm 96. The sleeve 106 can then be lifted clear of the window frame to allow the window to be opened.