Patent ID: 6904807
Filing Date: 2005-06-14
Classification: G01M

Abstract:
1. A shaker comprising: a sealed shaker housing a permanent magnet assembly supported within the housing for vibratory translation along an axis of the permanent magnet assembly, the permanent magnet assembly having a permanent magnet magnetized parallel to the axis, and first and second pole pieces spaced apart along the axis at first and second ends of the permanent magnet; first and second wire coils spaced adjacent and outward from a periphery of the first and second pole pieces, respectively, and secured to an inner wall of the shaker housing; the permanent magnet assembly having at least one electrically conductive shorting ring supported on the permanent magnet assembly adjacent at least one of the wire coils; a first tubular coil fastened to the permanent magnet assembly and flexibly coupled to ports on the shaker housing through which a fluid may be circulated for heating or cooling of the permanent magnet assembly; a second tubular coil fastened to the shaker housing and coupled to ports on the shaker housing through which a fluid may be circulated for heating or cooling of the permanent magnet assembly; the shaker housing being adapted for coupling to a shaker table or an article to be tested.