Spherometer with needle indicator (1118)
Index: 1118
Year: ?
Maker: ?
Dimensions: 12 x 16 x 12 cm
Info
Unknown spherometer.
In the central axis, there is a moveable rod that will, upon contact with the surface to be measured, be pushed upward. This will lift a first lever that will in turn lift the second lever. As such the leverage for indicating if the point touches the surface is quite big. As rudely calculated from a close-up, a movement of the center axle by 0.01 mm would rise the needle indicator by 0.01 x (28.5/1.5) x (36.5/1.9) = 3.65 mm.
References/Links/More Info
Could not find any info.
