Polishing machine having a rotary reciprocating shaft

A polishing machine for performing polishing operations and similar operations involving rotary motions and simultaneous oscillatory motions by a shaft in a direction longitudinally thereof, said machine comprising

• (a) a rotatable driven shaft;
• (b) a tool-supporting shaft arranged in coaxial relation to and spaced from said driven shaft;
• (c) a solid of rotation surrounding said driven shaft;
• (d) a first crank shaft mechanism driven by said driven shaft positively transmitting the rotary motions thereof to said solid of rotation;
• (e) a first bearing projecting in cantilever fashion from said solid of rotation and rotating jointly with said solid of rotation;
• (f) a first control plate being engaged under pressure by said first bearing and inclined in one direction to the common geometrical axis of said driven shaft and said tool-supporting shaft thereby imparting oscillatory motions to said solid of rotation in a direction longitudinally of said driven shaft;
• (g) a first slide bearing in said solid of rotation for said driven shaft;
• (h) means jointly rotatable with said tool-supporting shaft at the end thereof remote from its tool-supporting end;
• (i) a second crank shaft mechanism driven by said solid of rotation positively transmitting the rotary motions thereof to said means jointly rotatable with said tool-supporting shaft;
• (j) a second bearing projecting in cantilever fashion from said means jointly rotatable with said tool-supporting shaft and rotating jointly with said tool-supporting shaft;
• (k) a second control plate being engaged under pressure by said second bearing and inclined in a direction opposite to said one direction to the common geometrical axis of said driven shaft and said tool-supporting shaft thereby imparting oscillatory motions to said tool-supporting shaft in a direction longitudinally thereof and of opposite phase than the oscillations of said solid of rotation;
• and
• (l) a second fixed slide bearing supporting said tool-supporting shaft.