Dividers & CompassesProportional Dividers
Unlike regular dividers, proportional dividers have points at both ends. A screw and nut slide along a slot within the legs to allow the instrument to be opened into an "X" shape. The user then tightens the screw at a particular proportion in order to make scale drawings, such as for engineering or architecture. Proportional dividers are especially helpful when the drafter must change between several different scales. However, for one of these objects, there was only one desirable proportion, the so-called "universal ratio" of 5.333:1. Maurice Kidjel, a Hawaiian artist and inventor, sought out and received publicity for his device in the 1960s.
"Dividers & Compasses - Proportional Dividers" showing 1 items.
- This yellow fold-out leaflet was received with MA*333876. It provides instructions for the Cali-Pro, a proportional divider developed by Maurice Kidjel for making drawings in what Kidjel believed was the "universal ratio," 5.333 : 1. Kidjel and his business associate, Kenneth W. K. Young, filled orders for the device from an office in Honolulu, Hawaii. The leaflet contains examples of applications and testimonials. It was copyrighted in 1962.
- Currently not on view
- date made
- Kidjel, Maurice
- Young, Kenneth W. K.
- ID Number
- accession number
- catalog number
- Data Source
- National Museum of American History, Kenneth E. Behring Center