GB467615A - Improvements in and relating to sliding sash windows - Google Patents

Abstract

467,615. Sashes balanced by springs. YOUNG, W. Dec. 24, 1935, No. 35708. [Class 20 (iii)] Sliding window sashes of the kind which are balanced by spring - controlled nut and screw are provided with nuts axially fixedbut rotatable in tubular casings B on the sash, and on a screw I fixed to a bracket on the window frame. The torsion spring J is secured to the nut and to a member K freely slidable along the screw I but held against rotation by the casing B or by a projection and slot in the casing. The pitch of the screw may be varied, the engagement with the nut being secured by a ball engaging a semicircular section groove and recess in the members. The nut may be stopped against downward movement by a compression spring L engaging the non-rotatable and slidable member K, Fig. 3. Two balancing devices or a single control one may be provided and when the movement of the nut is to be shortened the casing B and the screw I are pivoted in an inclined position to the sash and frame at R, and Q respectively, Fig. 6. The sash is removably secured by screws C to flanges on the casing B. Side-play and vibration of the window sash is prevented by spring-pressed blocks S, Fig. 1, slidable in inclined housings on the sash and engaging the frame.