Informational device adapted to convert binary to decimal numerals

摘要

A stack of sheets, each sheet from the next to lowermost upwardly corresponding to a successive binary place, the lowermost sheet carrying array of decimal numerals, a pivot connecting the sheets for relative rotation, and a window in each sheet above the lowermost configured to expose in one position of sheet movement the decimal corresponding to the binary place of the respective sheet and additional decimal numerals.