Object Record
Images
Metadata
Object Name |
Instrument, Drafting |
Description |
Spencer Bierbaum Microcharacter is made of chrome-colored metal and black plastic. It has a ruler on one side and a plastic handle. Turning the handle causes scratches. The device is attached to a metal base with a circular footprint, and the whole thing sits on a larger circular wooden base. The device is then covered by a glass cloche with a round knob on top to lift by. To keep the glass cover from sliding off the wooden base, there's a ridge inset on the top of the wooden base that the base of the glass cloche fits inside. That inset is lined with a circle of cream and red floral carpeting as a shock absorber. |
Date |
1953 |
People |
Dootz, Edward |
Library of Congress Subject Headings |
Materials handling Measurement Measuring |
Made |
American Optical Instrument Division |
Function |
Determines how resistant a material is to being scratched. |
Place of Origin |
New York, New York |
Caption |
Smd01170003a |
Catalog Number |
0117.0003 |
Material |
Metal/Plastic/Wood/Glass |
Media Links |
INSERT LINK DESCRIPTION |
Search Terms |
American Optical Instrument Division AO Bierbaum Microcharacter Hardness measurement Hardness testing Meaasurement Measure Microscope Microscope attachment Scratch Scratch resistance Scratching Spencer Testing University of Michigan School of Dentistry Bio Materials transfer |
Brand |
American Optical Instrument Division/Spencer |