| 摘要 |
1,019,737. Splitting rocks. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Oct. 26, 1962 [Oct. 30, 1961], No. 40592/62. Heading B3E. [Also in Divisions H1 and H4] An apparatus for splitting non-metallic brittle material, such as rocks, comprises a transmission line 11 and a radiator 12, theradiator and line being capable of insertion into a hole 2 formed in the material, a pair of electromagnetic energy generators 7, 8 for applying a source of ultra-high frequency energy whereby the energy from the source can be fed along the line and radiated into the block by the radiator. The generators are formed by two magnetrons 7, 8 having conductors 13, 14 entering into a waveguide constituting the transmission line. The waveguide, which is of reduced diameter at its forward end for insertion into a hole 2 in the rock, has two pairs of guide strips 15, 16 provided in its inner wall, the ends of the strips extending beyond the waveguide to thereby form the radiator. In operation, when the magnetrons are energized, the electromagnetic field produced by the conductors 13, 14 propogate in the gap between the strips 15, 15 and 16, 16, respectively, to thereby produce local dielectric heating in the rock thus causing it to split. The radiator may be protected by a cap of polytetrafluorethylene. |
