Start-up monitoring apparatus for hydraulically driven machine - has time control component connected to electrical pressure switch, magnet-valve and disconnecting switch of motor.
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Drilling-rig for blasting holes - has hydraulically-operated reversing drive between boring bar and crown-shaped bit
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Excavator for reducing heave in tunnel floors or mine workings - consists of tracked vehicle mounting full circle slewing jib with excavator shovel
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STONE DRILL BIT
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Level indicator for underground pit mining - contains resistive chain with reed switches in slide tube for float moving with level of liq. in tank, level switch on tank stimulating resistive chain and accumulator in safe housing
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Dust removal plant for rock drilling - has facility for taking dust samples, and involves fan feeding drill waste in air current
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DEVICE FOR LOWERING TRACKS OR THE LIKE IN UNDERGROUND PIT OPERATIONS OR THE LIKE
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Aggregate for gallery or similar underground workings driving
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Drill
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Drilling for blasting - uses cradle and washing nozzle together with carriage mounted drive and hydraulic hammer
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DEVICE FOR LOWERING DISTANCES OD. DGL. IN UNDERGROUND PIT OPERATIONS OD. DGL.
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Drilling apparatus
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Drilling unit
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DRILLING DEVICE
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Apparatus for inserting and drawing off tubs
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MACHINE AND METHOD FOR CONTINUOUSLY RELEASING STONE OD. DGL. AND RECOVERY OF THE SOLVED, CRUSHED PLANT IN THE MINING, EARTH AND TUNNEL CONSTRUCTION
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Mobile outrigger for performing lifting, loading, and transporting operations, etc.
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PISTON PUMP WITH WORKING PISTON FOR COMPRESSING LIQUIDS AND GASES
