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US4845682A
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Interference avoidance device for use in a sensor system
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US4609869A
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Magnetic sensor and circuit for detecting the edge of a target as it passes the centerline of the sensor
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US4366373A
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Event rate counter
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US4097769A
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Circuit for controllably providing power from an AC source to a load
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US4028686A
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Digital detector
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US4090091A
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Housing and control circuit assembly with sensing element
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US4001718A
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Linear oscillator for proximity sensor
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US3916328A
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Zero crossover detector with variable hysteresis
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US3876927A
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Magnetic sensor with shorted turn
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US3794855A
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Regenerative transistorized switch with constant voltage circuit
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US3721968A
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Magnetic pickup
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US3743853A
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Adjustable proximity sensor
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US3697779A
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Function control
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