BOWL FEEDER

PURPOSE:To reduce noise of a bowl feeder for electronic and electric parts or the like by providing a bowl with a speaker driven by a signal which is produced by phase-inverting the frequency component signal of a bowl feeder driving alternating current source output, and moreover the outer peripher...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	MORI SADAAKI
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR CONVEYING DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HANDLING THIN OR FILAMENTARY MATERIAL LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PACKING PERFORMING OPERATIONS PHYSICS PNEUMATIC TUBE CONVEYORS PUBLIC ADDRESS SYSTEMS SHOP CONVEYOR SYSTEMS SOUND-PRODUCING DEVICES STORING TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING ORTIPPING TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To reduce noise of a bowl feeder for electronic and electric parts or the like by providing a bowl with a speaker driven by a signal which is produced by phase-inverting the frequency component signal of a bowl feeder driving alternating current source output, and moreover the outer periphery of the bowl with a noise insulating cover. CONSTITUTION:A speaker driving means 11 phase-inverts frequency component signal issued from an alternating current source 10 through an isolation amplifier 12 and a phase sifter 13, and amplifies it by a power amplifier 14 to issue a signal for driving a speaker 8. The sound pressure level of sound produced by the speaker 8 is established so as to be about equivalent to the sound pressure level of noise produced by a bowl 2 according to the driving of a bimorph cell 5. Thus the sound from the speaker 8 and the noise from the bowl are mutually cancelled for reducing the noise. In addition to that, the noise insulating effect of a noise insulating cover 7 produces the lower noise.