| 摘要 |
An apparatus for setting the height of a desk chair for a person has a base adapted to stand on the floor, a guide fixed to and extending vertically up from the base, a support vertically slidable in the guide, and a clamp that can arrest the suport in the guide at any of a multiplicity of vertically offset positions therealong. A rigid arm extends horizontally from the support and has an outer end displaceable between a horizontal position nested in the arm and a vertical position depending straight down from the arm outer end and having a lower end 1in to 2in below the outer end of the arm in the vertical position.
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