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Brushless direct current motor with magnetically operated commutating switch means
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Vacuum operated sampler
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Vacuum-operated sampler and distributor for multiple sampling operation
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Vibration transducer for burglar alarms and the like
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Direct current oscillator fed motor
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Eccentric with variable stroke
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Variable-rate pump
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Brushless transistor commutated motor
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Centrifugal switch
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Effluent sampler
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Indicator coupling apparatus
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Adjustable timing cam
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Transistor commutated direct current motor
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Oscillating commutatorless direct current motor
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Commutatorless direct current motor
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Relative humidity indicating and recording apparatus
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Governor for electrical motors
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Sensitive pressure measuring servosystem
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Dynamotor
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Electrical motor
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