Patent GB-439463-A (GB)
Title: Improvements in folding sash windows
IPC: E06B3/48
Filed: 1935-05-28
Abstract: 439,463. Hinged and pivoted sliding windows; casements; draught-excluders. DEKEYSER, R., 19, Thier de la Fontaine, Liege, Belgium. May 28, 1935, No. 15464. Convention date, June 1, 1934. [Class 20 (iii)] A hinged and pivoted folding-sliding window or casement comprises three sashes S, M, I, connected by hinges and provided with trunnions slidable in grooves in the frame C. A stop or shoulder 4 is provided beneath the trunnions of the sash M on which the sashes can open zig-zag fashion and remain balanced in any position, Fig. 4. Openings are formed at 5, 8, 9, Fig. 11, in the sides of the grooves through which the trunnions may pass and by means of which the sashes may be removed from the frame or reversed. The openings 5, 8, 9 may be closed by pivoted flaps c<3>, recesses 16 being provided in the base of the grooves 2 for raising the flaps said recesses being closed by removable plug-in covers, Fig. 18. The upper sash trunnions can only pass through the openings 5 when the sashes S and M are in contact, blade springs 6, Fig. 11, being attached to the sash M which have to be compressed to allow the sashes to reach this relative position. The trunnions of the sash M may be attached to reinforcements let into the sash and the trunnions of the sashes S and I may be removable from the grooves by sliding in tubes 50 by means of stems 52 screwed into the trunnions through slots in the tubes, Fig. 31, the trunnions being locked in operative and inoperative positions by screwing the stem into recesses 53. A hinged flap 10, Fig. 22, is provided on the frame beneath the bottom sash which may be opened from beneath the sash to allow an opening above the sash S. Hinged joint covers 13 and 11, Fig. 22, between the frame and sash, and between the sashes are provided, the vertical covers 13 being secured in the closed position by pivoted stops 28 which coact with angle members 30 on the cover. Portions 14 of the vertical joint covers may be fixed. When the lowest sash has been freed from its guides the window assembly may be secured in opened position by pins passing through an apertured plate 25, Fig. 22, on the sash and into the frame and when in zig-zag opened position the window may be secured by pins above and below the pivots passing through the frame. When the window is used as a folding casement the joint covers may be replaced by felt or spring strips on the vertical sides and the outer face of the lower guide is bevelled at 41 to exclude rain &c. and a drip groove 42 or strip provided in the adjacent sash members, Fig. 23. To stop draught through the guide grooves between the openings when joint covers are not provided pivoted gravity-actuated stops 62, Fig. 28, are mounted in the grooves. These pivot upwardly into recesses 48 to allow the pivots to pass when folding and unfolding the window. Bolts 47 may be provided on one or both of the outer sashes and handles 19, 20 are provided on the bottom sash of the vertically mounted window. The flap 10 when applied to a folding casement may be pivoted or hinged wholly or in part at or near one end, Fig. 30.