ELECTROMAGNETIC VIBRATOR - MURAKAMI SEIKI KOSAKUSHO KK

Title:

ELECTROMAGNETIC VIBRATOR

Document Type and Number:

WIPO Patent Application WO/1990/015004

Kind Code:

A1

Abstract:

An electromagnetic feeder driven by a conventional electromagnetic vibrator is vibrated at a frequency of 50 or 60 Hz of commercial power source. When the electromagnetic feeder has a larger size, therefore, the vibration and noise become so offensive as to create an environmental problem. The invention comprises a movable iron core (12) fixed to one mass (7) of the two masses (7) and (4) coupled by an elastic material (5), two fixed iron cores (13) and (13') fixed to the other mass (4) so as to be positioned on both sides of the movable iron core (12), two exciting coils (15) and (15') wound on these cores (13) and (13'), and a control circuit which alternatingly supplies these two exiting coils (15), (15') with a current whose phase is controlled. The mass (7) to which the movable iron core (12) is fixed is coupled to an object (1) that is to be vibrated. Therefore, the vibration frequency of the movable iron core (12) reduces to a half of the power source frequency, and offensive noise caused by vibration is greatly decreased. Further, since the current can be nearly halved, less energy is consumed.

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Inventors:

MATSUMOTO EIJI (JP)
OSHIMA NORITOSHI (JP)

Application Number:

PCT/JP1990/000685

Publication Date:

December 13, 1990

Filing Date:

May 28, 1990

Export Citation:

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Assignee:

MURAKAMI SEIKI KOSAKUSHO KK (JP)

International Classes:

B06B1/04; B65G27/24; B65G27/04; B65G27/32; (IPC1-7): B65G27/08; B65G27/24

Foreign References:

JPS5762109A	1982-04-15
JPS6175717A	1986-04-18
JPS62280111A	1987-12-05
JPS3918586B1
JPS5129294B2	1976-08-24
JPS5911815U	1984-01-25
JPS5911816U	1984-01-25

Other References: