| 摘要 |
Vertically bored for horizontally swingable mounting on a vertical pivot pin fixed in a base is an upstanding mirror holder support post containing a horizontal partly-cylindrical recess thereacross, the horizontal axis of which intersects the vertical axis of the pivot pin. Mating with the partly-cylindrical recess and coaxial therewith is a horizontal partly-cylindrical convex mirror holder with a flat front mirror mounting face thereon. A first set screw locks the post in its horizontally-adjustable position relatively to the pivot pin, whereas a second set screw locks the mirror holder in its vertically-adjusted position relatively to the mirror holder support post.
|
