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Optical system with polarizing filters for line follower head
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Magnetic tracer drive for flame cutting burner machines
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Torch machine for cutting castellated shapes
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Automatic burner height control circuit
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Optical system for a photoelectric line follower to automatically follow a contour line
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Tracing mechanism for oxygen jet cutting machines
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Method and apparatus for following an outline on a substrate
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Improvements in oxygen jet cutting machines
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Improvements in oxygen jet cutting machines
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Oxygen jet cutting machines
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Improvements in and relating to mechanically driven tracing devices
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Photoelectric controlled line following devices as used with oxygen jet cutting machines
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Improvements in or relating to photo-electric controlled line following devices as used with oxygen jet cutting machines
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Improvements in or relating to oxygen jet cutting machines
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Improvements in or relating to oxygen jet cutting machines
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Improvements in or relating to oxygen jet cutting machines
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Improvements in or relating to flame cutting machines
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Improvements in and relating to flame cutting burner machines
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Improvements in or relating to photo-electric control devices
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