| 摘要 |
An articulated column drafting table having a forwardly inclined hinged column rising from the apex of a V-shaped base with the spread of its arms to the front and a drawing board tiltingly mounted on the upper end of said articulated column characterized by an improved board tilting and column hinging mechanism that allows a wide angle range for hinging of the upper limb of the articulated column and for tilting of the drawing board on the free end of the upper limb. The hinging of the upper limb of the articulated column from upright to lowered position and the tilting of the board from vertical to horizontal position under the influence of separate and independent counterbalancing means, with individual tension adjustments, allows each to rest in a state of static equilibrium at any point in its turning angle range when in unlocked position. Both the hinging column limb and the tilting drawing board are releasably locked in securely fixed position on the actuation of a single locking device. The tilting drawing board and the column hinging limb are each turnable through a selected predetermined arc of approximately ninety degrees and have positive stops at both ends of the respective permitted turning arcs.
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