| 摘要 |
A base plate carries a denture model surveyor table having model clamping fingers and a clamping screw; also a column to which is pivoted, by a ball joint, a universally-adjustable surveyor tool head including an inclined shaft horizontally pivoted to a horizontal shaft. Rotatably mounted on the forward end of this shaft is a stub shaft carrying a horizontal transverse bearing rotatably supporting the hub of a double-disc reel. Secured to the outer sides of the reel discs are two parallel chordal slide bars upon each of which is slidably mounted a chordal slider from which an axial slide bar projects perpendicularly outward. Slidably mounted on each axial slide bar is an axial slider. Depending from and tiltable relatively to each axial slider is an elongated telescoping tubular tool holder terminating in a tool chuck.
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