Patent GB-788490-A (GB)
Title: Improved metal joinery for bays
IPC: E06B3/12
Filed: 1956-02-21
Abstract: 788,490. Windows. SOC. DE CONSTRUCTIONS METALLIQUES DU BATIMENT S.C.M.B. Feb. 21, 1956 [Jan. 30, 1956], No. 5266/56. Class 20(3) A window comprises a fixed frame formed by two uprights A, B and upper and lower transverse members C, D, and casements V<SP>1</SP>. V<SP>2</SP> each formed of two uprights E<SP>1</SP>, F<SP>1</SP> or E<SP>2</SP>, F 2  and upper and lower transverse members G<SP>1</SP>. H\ or G<SP>2</SP>, H<SP>2</SP>, the fixed frame members A, B, C, D all being formed of identical profiles a, b ... m, n such that when the casements are closed they co-operate with the casement frame members E<SP>1</SP>,E<SP>2</SP>,G<SP>1</SP>, G<SP>2</SP>, and H<SP>1</SP>, H<SP>2</SP> first making contact at 11 over a relatively wide strip towards the outside of the window and then towards the inside along a line at 12. Two expansion chambers 13, 15 being formed between the points 11 and 12. The profile sections A, B, C, D, are all open at a, n towards the lateral faces of a wall 1, the part b, c being on the outside of the building and the part l, m on the inside. The part c, l is shaped to form two longitudinal inner grooves 2, 3 which are separated by a rib 4. Each casement V<SP>1</SP> or V<SP>2</SP> is hinged to the corresponding upright A or B by a hinge plate the blades 9 and 10 of which are fixed respectively to uprights A and E<SP>1</SP> or B and E<SP>2</SP>, inwardly turned portions o, p, and y, z of the uprights E<SP>1</SP> and E<SP>2</SP> of the casement frames engaging respectively within the grooves 2, 3 of the corresponding profiles A and B of the fixed frame. A clearance 14 between the internal face h, i of each rib groove 2 and the edge o of the corresponding sash frame profile affords communication between the first chamber 13 and the second chamber 15. Water seeping through, at 11, into the chamber 13 and by way of the clearance 14 into the chamber 15 is cleared through an opening 16, formed in the base of the groove 2 and in part of the rib 4 of the lower fixed profile D, and on to an inclined facing 18 which caps a sill 19, and then to the outside through an opening 20 in the profile D. Condensate formed on the inside of the window trickles down into the groove 3 a hole 22 in the base thereof allowing the condensate also to discharge through the opening 20. The ribs 4 of the upper and lower transverse members C, D are shallower than the corresponding ribs on the uprights A, B, and therefore do not impede the opening of the window. The casement profile F<SP>2</SP> forms a sealed cavity 23 in conjunction with an adjacent facing 24 and accommodates a fastener bolt 25. the other profile F<SP>1</SP> making a line contact at 26 and an external airtight line contact at 27. Sections such as F' may equally well be used in conjunction with the frame. uprights A and B. In a modification the sash uprights E<SP>3</SP>, Fig. 7. constructed of closed profiles to make a more rigid frame, co-operate with the usual type of fixed frame profile a, b ... m, n. The upright sections E<SP>3</SP> each form a channel 30 opening at each end into the grooves of the upper and lower transverse profiles, not shown. It is thus possible to introduce paint or varnish into the channels 30 to protect them. The frame uprights B and the sash uprights E<SP>3</SP> co-operate to form two expansion chambers 13a, 15a. An. angle shaped bracket, not shown, may bridge the open face of the rib 4 of the upper frame member C to avoid the risk of plaster or other material, falling down through an opening which is formed in the middle of the member C to receive the upper end of the movable window-fastener 25 in the sash upright. F<SP>2</SP>.