| 摘要 |
334,457. Pierre, E. H. J. Nov. 28, 1928, [Convention date]. Protecting-covers. - In a protecting device for the valves or cocks of gas cylinders of type consisting of hinged juxtaposed half shells 6, the said half shells are hinged to a ring 3 permanently secured to the vessel 1, as by rivet. ing. A hook 7 pivoted to one part 6 passes over the other part 6 to secure the two parts together. A seal is effected by a lead wire passed through interfitting projections 9, 10 on the two parts 6. |
