Preview
Date
ca. 1987
Description
Designed by William Keister, a pioneer in telecommunications switching systems theory to illustrate principles of logic. Disks can be rotated individually at the indicated spot so that the base of the puzzle is unlocked from the slide.
Object Number
PT.0371
Box Number
47
Material
plastic
Dimensions
1.3 x 31 x 5.4 cm (1 1/2 12 1/4 x 2 1/8 inches)
Keywords
Arthur Loeb Design Science Teaching Collection; mechanical puzzles