초록 ▼

An adjustable typewriter platform mechanism is provided for use with a desk of the type having a typewriter platform recess in the desk top. The typewriter platform mechanism includes a U-shaped base plate which is horizontally mounted at a spaced distance below the desk top. Four vertically dispose

An adjustable typewriter platform mechanism is provided for use with a desk of the type having a typewriter platform recess in the desk top. The typewriter platform mechanism includes a U-shaped base plate which is horizontally mounted at a spaced distance below the desk top. Four vertically disposed jack-screws are rotatably journalled between the base plate and the desk top for nontranslational rotation; and means is provided for simultaneously rotating all of the jack-screws. A pair of parallel spaced and horizontally disposed support-bars are mounted to respective ones of the jack-screws to receive lifting motion therefrom. Limited relative horizontal movement between the support-bars and the jack-screws is permitted in two horizontal and orthogonally intersecting axes; and means is provided for vertically guiding the support-bars in one vertical plane to minimize relative movement between the support-bars and the jack-screws in one of the aforesaid horizontal axes.

대표청구항 ▼

An adjustable typewriter platform mechanism for use with a desk having a desk top with a typewriter platform recess, the mechanism comprising a horizontally disposed U-shaped base plate having two substantially parallel and elongated sides and having a cross-member interconnecting said sides; means

An adjustable typewriter platform mechanism for use with a desk having a desk top with a typewriter platform recess, the mechanism comprising a horizontally disposed U-shaped base plate having two substantially parallel and elongated sides and having a cross-member interconnecting said sides; means for fastening said base plate to said desk with said base plate being horizontally disposed below said desk top; a plurality of vertically disposed jack-screws each having one end thereof rotatably journalled in said base plate for nontranslational rotation therein, being spaced both longitudinally along and transversely from a horizontal axis on said base plate, and each having the other end thereof rotatably journalled in said fastening means for notranslational rotation therein; means, including a pair of parallel spaced and horizontally disposed support-bars, for supportably attaching a typewriter platform to said jack-screws to receive lifting motion therefrom, to permit limited vertical motion between said support-bars and said jack-screws, and to permit limited relative horizontal movement between said support-bars and said jack-screws in two horizontal and orthogonally intersecting axes; and means for simultaneously rotating all of said jack-screws.