4. Electrical transmission or interconnection systems
  5. Switching systems
  6. Condition responsive

Stephen P. Johnston

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Alternator circuit arrangement useful in liquid level control sy

Electricity: motive power systems – Automatic and/or with time-delay means – Level of fluid or granular material
Patent

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Electrical load control circuit useful in liquid level control s

Electricity: motive power systems – Automatic and/or with time-delay means – Level of fluid or granular material
Patent

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Float switch

Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent

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Float switches with wide differential

Electricity: circuit makers and breakers – Float – Float and pressure
Patent

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Mercury switch

Electricity: circuit makers and breakers – Liquid contact – Tiltable or rotatable
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Profile ID: LFUS-PAI-P-309109

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