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Expired
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GB21285/58A
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Individual
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Individual
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Publication of GB838190ApublicationCriticalpatent/GB838190A/en
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
E21D11/14—Lining predominantly with metal
E21D11/28—Longitudinal struts, i.e. longitudinal connections between adjoining arches
Abstract
838,190. Mine roof supports. PAURAT, F. W. July 3, 1958 [Nov. 30, 1957], No. 21285/58. Class 20(2) Struts 1 are connected to each other and to mine arches 2 by a loop of steel rope 3 which passes over projections 5 on the struts or over one projection 5 and a clamp on the other side of the arch (Fig. 1, not shown) refers.
GB21285/58A1957-11-301958-07-03Improvements in or relating to struts for mine arches
ExpiredGB838190A
(en)