| 摘要 |
1,030,298. Boring earth, &c. ASAHI KASEI KABUSHIKI KAISHA, and TSURUMI-SEIKI KOSAKUSHO CO. Ltd. Sept. 23, 1964 [Sept. 27, 1963], No. 38814/64. Heading E1F. A core is taken from the sea bed by a core retaining tube 3 which is rotated and advanced into the bed by a reaction engine 1 having nozzles 2. The tube 3 is slidable in a frame 5 and the complete apparatus is supported by a wire 10. A powder charge in the engine is electrically ignited by means of a cable 11, a support wire 7 breaking as the tube is propelled into the bed. In a modification an engine for withdrawing the tube from the bed is mounted above the engine 1, the engine 1 is operated by an ignition switch which closes as the frame engages the bed, and this second engine is operated by an ignition switch on the frame closing when engaged by the engine 1.
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