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CA1104243A
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Ground fault circuit interrupter module
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Ground fault sensor current transformer
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Ground fault detectors
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Permanent magnet solenoid device
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Shark repelling device including pulse generator producing electrical field in water between widely spaced electrodes
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Static hazard detector for isolated alternating current supply lines
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Current transformer having primary side switchable to different measuring ranges
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Portable voltage and frequency tester
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Inverter having regulated output voltage at a constant frequency
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Frequency meter utilizing a transformer having a non-rectangular hysteresis loop saturable core and a compensation circuit therefor
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Transistorized gating circuit for high voltage controlled rectifiers
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Battery charger
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Universal battery charger
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Generator voltage control system
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Polyphase power totalizing and indicating apparatus
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