| 摘要 |
A book support is mounted to a vertical upright assembly affixed to a weighted base. The book support is selectively positionable in various horizontal positions by swinging a horizontal swing arm articulated with a pivot connection to a one end of a horizontally extending segment of an upper member of the upright assembly. The swing arm is also rotatable about its own axis longitudinal by a pivot connection with the horizontal segment of an upper member of the upright assembly. An adjustable pivot connection also mounts the book support to a free end of the swing arm allowing reorientation of the book support about an axis normal to the longitudinal axis of the swing arm. A book shelf-rack support structure is fitted over the upright and has book shelves, racks mounted thereto. A cast iron platform weights the base and has a molded plastic cover.
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