4. Electric power conversion systems
  5. Frequency conversion without intermediate conversion to d.c.
  6. By semiconductor converter

John B. G. Hedberg

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Apparatus for igniting the match heads of electric detonators

Electricity: electrical systems and devices – Igniting systems – For explosive devices
Patent

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Arc welding current supply

Electric heating – Metal heating – By arc
Patent

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Current unit for arc welding

Electric heating – Metal heating – By arc
Patent

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Current unit for arc welding

Electric heating – Metal heating – By arc
Patent

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Electric detonator cap

Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit
Patent

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Profile ID: LFUS-PAI-P-857954

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