4. Electricity: circuit makers and breakers
  5. Liquid contact
  6. Time delay

Roger L. Robertson

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Circuit interrupter having flash plates with interrupted surface

Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent

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Electronic overload relay power source

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent

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Polarized DC contactors

Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Plural independently operable switches
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Profile ID: LFUS-PAI-P-1642449

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