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William Henri Luther
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Individual
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Individual
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Publication of GB190109544ApublicationCriticalpatent/GB190109544A/en
9544. Luther, W. H. May 8. Windows.-Slits a<1>, b<1> are cut in the webs a and flanges b of metal sash-bars at the points of intersection, and the slits in the flanges are expanded as shown in Fig. 3 to admit the bars with the slotted webs. The slits in the flanges are closed up again by hammering or pressure to form a rigid interlocking-joint.
GB190109544D1901-05-081901-05-08"Improvements in and relating to Metal Sash Frames for Windows and the like"
ExpiredGB190109544A
(en)