4. Communications: electrical
  5. Continuously variable indicating
  6. Using a particular modulation

John Trett

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Detection systems for detecting obstructions in doorways

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent

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Monitoring and controlling lift positions

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent

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Photoelectric array detection circuitry with dual gating means

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent

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Proximity detection systems

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent

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Proximity detector

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
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Profile ID: LFUS-PAI-P-433596

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