Metal barrier for a window or door for prohibiting burglars from

Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Fabric or lattice; e.g. – indeterminate grating

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Details

52106, 52667, E04C 242

Patent

active

058131876

ABSTRACT:
A metal barrier including a rectangular metal frame having a plurality of plug holes on the inside on two opposite vertical sides and two opposite horizontal sides thereof; a plurality of transverse metal tubes mounted within the rectangular metal frame and having respective both ends respectively and fitted into the plug holes on the opposite vertical sides of the rectangular metal frame, each transverse metal tube having a row of through holes; and a plurality of longitudinal metal tubes intersected with the transverse metal tubes and mounted within the rectangular metal frame, the longitudinal metal tubes being respectively inserted through the through holes of the transverse metal tubes and having respective both ends respectively fitted into the plug holes on the opposite horizontal sides of the rectangular metal frame.

REFERENCES:
patent: 180232 (1876-08-01), Heinz
patent: 220505 (1879-10-01), Streeter
patent: 450678 (1891-04-01), Pauly
patent: 469520 (1892-02-01), Hale
patent: 469635 (1892-02-01), Hale
patent: 1101745 (1914-06-01), Jones
patent: 1354821 (1920-10-01), Garratt
patent: 1791680 (1931-02-01), Miller
patent: 1954559 (1934-04-01), Crandall
patent: 3736714 (1973-06-01), Brenner
patent: 3942764 (1976-03-01), Beverdorf
patent: 5609002 (1997-03-01), Fernnandez

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