Abstract: An oscillatory bed for a person operates to shift the person's weight in order to eliminate problems associated with convalescence. The bed has a main support frame which receives a cradle frame that is pivotally driven through a cycle about a pivot axis between opposite angular orientations. The cradle frame has side rails, and a support panel has longitudinal side edges fastened along the side rails so that it depends downwardly in an arcuate curvature therebetween. The support panel is constructed of a deformable sheet of stiff, resilient material so that the portion thereof that underlies the person during shifting remains somewhat flat as weight is shifted between the right and left sides of the body. The cradle frame is preferably mounted by trunnions, and a drive wheel is connected to one of the trunnions to be driven by a reversible motor though a gear box and, if desired, a clutch. Limit switches reverse the motor and back-up limit switches are used.

Abstract: A machine tool clamp includes an elongated clamping member with its mid-section anchored at an adjustably spaced distance above a base plate. The front end of the clamping member is adapted to clamp a work piece to a machine tool work platform. The rear end or heel of the clamping member bears pivotally on the base plate in such a manner that the adjustable anchor of the mid-section is a movable fulcrum. A height adjustable mechanism with a large mechanical advantage is positioned in the heel of the clamping member to lever the clamping member about the adjustable fulcrum to clamp the front end on a work piece. The height adjustable mechanism can be a screw, eccentric cammed lever, hydraulic or pneumatic cylinder, or other suitable mechanism.