Eriez Manufacturing Co.

Jerry A Selvaggi

John R Purcell

Marshall A Carner

Thomas H Falconer

A vibratory feeder for feeding low density powered material having a tray, a base and a motor supporting the tray on the base. The motor includes an electromagnet having an AC coil supported on an intermediate leg between the outer legs and an armature having a permanent magnet and two pole plates. The pole plates being disposed in the spaces between the outer legs and the intermediate leg. A rare earth magnet is supported between the pole plates. Spaces between the electromagnet legs and the pole plates providing for a stroke of about 0.2 inch at a frequency of 30 Hertz and a tuning spring connecting the motor to the tray. The tuning spring being adjustable to change the deflection of the tray relative to the motor.

Electromagnetic vibratory feeder with rare earth magnet

A high gradient magnet is disclosed having a coil of superconducting material immersed in liquid helium in a toroidal shaped liquid helium vessel, supported in axial spaced concentric relation to a toroidal shaped liquid nitrogen vessel which forms one end of a toroidal heat shield made of high heat conductive material in which the liquid helium chamber is supported by a first coil support ring and a second coil support ring. The heat shield and liquid helium chamber are in turn supported in a toroidal shaped vacuum chamber which is in turn supported in a heavy iron cylindrical enclosure closed at the ends and having an opening through the center of its ends. A slurry containing iron particles may pass through the opening in the center whereby the iron particles from the slurry are retained by a matrix. The first coil support ring has two ends supported on the vacuum vessel and an intermediate part. The second coil support ring has two ends supported on the liquid helium chamber and an intermediate part connected to the intermediate part of the first coil support ring so that the liquid helium vessel is supported in spaced relation to the heat shield and in spaced relation to the liquid nitrogen vessel. A bipolar power supply is provided for the superconductor magnet whereby the magnet is magnetized and demagnetized in fast ramp fashion.

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Erie, PA, United States of America

Jerry A Selvaggi