Conveyors: power-driven – Conveyor section – Reciprocating conveying surface
Patent
1994-08-03
1996-02-27
Bidwell, James R.
Conveyors: power-driven
Conveyor section
Reciprocating conveying surface
198756, B65G 2702
Patent
active
054941512
ABSTRACT:
A vibratory parts-feeder apparatus includes a vibratory parts-feeder, a surrounding device for surrounding the vibratory parts-feeder, a sound-wave generator arranged below the vibratory parts-feeder, a noise detector arranged near the vibratory parts-feeder or attached thereto for detecting noise generating from the vibratory parts-feeder, a noise-cancelling signal generator, receiving the detecting output of the noise detector and driving the sound-wave generator; whereby sound-waves generating from the sound-wave generator are transmitted outwards from an annular gap at the upper end of the surrounding device, the surrounding device consists of a first cylindrical body with a bottom, surrounding the vibratory parts-feeder and a second cylindrical body, with a bottom, surrounding the first cylindrical body, the sound-wave generator is arranged at an opening made in the bottom of the second cylindrical body, and sound-waves generating from said sound-wave generator are transmitted outwards from an annular gap between the upper ends of the first and second cylindrical bodies.
REFERENCES:
patent: 3613869 (1971-10-01), Schuricht
patent: 3826870 (1974-07-01), Wurm et al.
patent: 3960237 (1976-06-01), Sleeper
patent: 4245737 (1981-01-01), Pellerin et al.
WO-A-89 07701 (Noise Cancellation Technologies, Inc.).
Patent Abstracts of Japan vol. 11, No. 316 (M-631) 15 Oct. 1987 & JP-A-62 100 311 (MEIJI ENG KK) 9 May 1987.
GB-A-2 204 916 (British Gas PLC) WO-A-92 17936 (Applied Acoustic Research).
Kato Kazumichi
Kondo Hiroyuki
Bidwell James R.
Shinko Electric Co. Ltd.
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