GB481936A - Improvements in or relating to mechanism for opening and closing hinged windows and the like - Google Patents

Abstract

481,936. Window regulators. WILLIAMS & WILLIAMS, Ltd., and WILLIAMS, J. Sept. 16, 1936, No. 25203. [Class 20 (iii)] Operating mechanism for hinged windows, shutters, and the like, comprises a bar C which is pivotally connected at A<1> to an edge of the hinged frame at right-angles to the hinge axis, and which lies at least partly in the space between the hinged and fixed frames when the hinged frame is in the closed position. Further, the bar is moved by operating mechanism which imparts an endwise thrust to the bar when the latter must move endwise to open or close the window or the like, and a force tangential to a circle having as centre a pivot C<2> on the bar when the line joining this pivot and the point A<1> passes through or close to the axis about which the window hinges. In the construction shown, the pivot C<2> is guided in a guide or channel E<1> fixed to a casing E on the window frame. The bar C is provided with teeth C<1> which co-operate, throughout the movements of the bar, with a pinion F. The latter is geared to a pinion F<1> which is mounted on the same shaft F<2> as a worm-wheel which is in mesh with a worm on the operating handle. The sash frame A is hinged at B<1> to the window frame D about a vertical axis and the bar is attached to the lower edge of the sash frame. In modifications, the axis of the hinge or hinges is horizontal or inclined. The Provisional Specification also describes a construction in which an intermediate point in the bar is pivotally connected to an arcuate rack which is pivotally mounted on the window sill or other fixed part so that, when the window is in the closed position, the initial movement imparted to the rack about its pivot tends to swing the bar outwards. Means are provided which, during the initial opening and final closing movement of the window, prevent the outer end of the bar from swinging outwards while permitting the bar to rock about such end and also to move longitudinally to the necessary extent.