| 摘要 |
An extensible slotted upright for mounting cantilever type brackets is disclosed. The upright is comprised of telescoping inner and outer tubes, each tube having a plurality of spaced apart slots along diametrically opposing sides for engagement by the bracket. The tubes are oriented with respect to each other such that each slotted side of the outer tube is adjacent and parallel to a slotted side of the inner tube. A spacer is positioned between the inner and outer tubes such that a bracket may be mounted through the slots of the outer tube without restriction or interference from the inner tube. Means are provided for securing the tubes in a predetermined telescoping position.
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