PANTOGRAPHIC MOUNT FOR A MAGNETIC TRANSDUCING HEAD

摘要

A flexural pantographic mount for use in a helical scan magnetic tape transport employing a closed loop servo system having a specified frequency bandwidth is disclosed. The mount is a boxed leaf stiffened flexural pantograph mount, for holding and varying the position of a moveable head in a helical scan automatic scan tracking magnetic tape transport. The mount exhibits an acceptably low primary mode stiffness and a suitably increased higher order mode stiffness with increased resistance to torsional stresses and is adapted for use in a magnetic tape transport employing a closed loop servo system having a specified frequency bandwidth. The mount includes a moveable body such as a magnetic transducing head assembly coupled at one end of first and second parallel spaced apart elongated flexible flexural pantographic leaves configured at the opposite free ends thereof for attachment to a fixed body. Each leaf includes first and second integrally formed and bent leaf edge extensions, which act as side stiffeners. A triangularly configured opening and a trapezoidally configured opening are formed in each leaf with each opening being configured to include tab projections for bending into the opening to provide transverse or lateral stiffening. An auxiliary web-like stiffening member is added to each leaf in the space therebetween, each auxiliary stiffener being separately formed and configured for attachment to the respective leaf to the side stiffeners and the tab projections of the openings to form a box-like cross-sectional configuration in conjunction with the side leaf edge extensions. The main body portion of each leaf and the edge extensions of the auxiliary stiffeners are configured, dimensioned and arranged for connection to one another in both the longitudinal and transverse directions. The openings are formed in each leaf at locations such that the flexing surface of the leaves, at the connection to the fixed body and at the connection to the moveable body, are smaller width strap sections, substantially less than the width of the corresponding portion of the leaf.