| 摘要 |
A drafting table having a tilting board, supported on a desk by columns that are adjustable vertically on the desk. The board may be tilted and locked in any angular position on the upper ends of the columns. A first locking mechanism is provided to lock the columns in any selected vertical position and a second locking mechanism is provided to lock the board at any selected angular position on the columns. The first and second locking mechanisms are so arranged that a single handle actuates both by an improved locking arrangement. The single handle unlocks the angular movement of the board when the handle is moved to a first position and relocks the board and unlocks the columns when the handle is moved to a second position. An energy cell is used in combination with the other apparatus to counterbalance the weight of the board and the columns. A leaf clutch and torsion spring arrangement is used to lock and counterbalance the board in tilting.
|
