Abstract: A window closure system comprising a closure member for connecting a window sash to a window frame. The closure member comprises a corrosion resistant elongated rigid rectangular body portion formed from a single continuous stainless steel sheet or a single continuous stainless steel alloy sheet. The body portion having a planar layer and two metal members folded over into substantial abutting contact with the planar layer. One or more keeper members are used to engage the metal layers and prevent their movement from away from the abutting contact with the planar layer. The closure member may comprise part of a swivel arm, a hinge arm and a tie bar.

Abstract: A closure member used with a window closure system in securing a window sash to a window frame is characterized by a corrosion resistant elongated rigid rectangular portion or body having two or more juxtaposed corrosion resistant metal sheet layers. The closure member is formed from folding one or more metal sheets having a thickness selected at between about 0.25 and 2 mm, and more preferably, about 0.25 and 1 mm, wherein an edge portion of the sheet is bent back against an adjacent portion to form a multi-layered laminate structure. To eliminate potentially dangerous sharp side edges, opposing longitudinal edge portions of the stainless sheet may be folded inwardly against a central portion of the sheet by bending along two longitudinal extending and parallel fold seams. The closure member may be used to secure a window sash to a window as part of a swivel arm, a hinge arm, and/or as part of a reciprocally movable tie bar used to selectively lock or unlock the window sash to the frame.