1. Field of Invention
This invention relates to display units such as used by retail establishments for merchandising various wares. More particularly, this invention relates to a vertically extensible bar and a clutch mechanism for holding it in adjusted position.
2. Description of the Prior Art
A vertically extensible bar of a display rack may have an arm for supporting a series of hangers for clothes or other merchandise. Optionally, it may cooperate with a companion bar for supporting a shelf. The typical prior art structure for holding the bar in an extended position is a series of holes in the standard and a spring detent in the bar. There are several drawbacks to this arrangement. One disadvantage is that the series of holes in the standard are unsightly. Merchandisers appreciate more elegance in the display units for their merchandise.
Other disadvantages include the inability to achieve infinite adjusted positions, the possibility of the coupling inadvertently slipping, the necessity of performing fabrication steps both on the standard and the bar.