Boots – shoes – and leggings
Patent
1985-10-22
1989-08-22
Harkcom, Gary V.
Boots, shoes, and leggings
36470911, G06F 300
Patent
active
048602337
ABSTRACT:
A dedicated calculator for performing arithmetic operations on dimensioned quantities, particularly those in the English units of feet, inches and fractions of inches. The calculator keyboard includes a plurality of conventional algebraic calculator keys as well as dedicated keys for entry of values in inches and fractions of inches. A display provides formatting according to the mode of operation and the result. The calculator operates in modes for displaying feet, inches, and fractions of inches; decimal feet; metric values; and to operate as a conventional algebraic calculator. All numbers are stored internally as binary floating point numbers representative of values of feet. Therefore, all values are preserved when switching from metric mode to one of the foot modes and any conversions of the output to metric measurements are only made to the data to be displayed. A repeat function and a plurality of storage registers for storing both data values and operator values are provided so that repetitative operations may be easily executed. Also, the calculator responds to different keystroke sequences indicating division of a dimensioned quantity by a dimensioned quantity or an undimensioned quantity to provide an undimensioned, or a dimensioned displayed result. When the result is undimensioned, only the integer part is provided and a particular keystroke sequence may be used to selectively view the remainder as a dimensioned quantity.
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uPD 7225 Intelligent Alpha Numeric LCD/Driver Technical Manual, Nippon Electric Company.
Harkcom Gary V.
Shaw Dale M.
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