Michael L Lyons

US Patent:

58863311, Mar 23, 1999

Filed:

Nov 18, 1996

Appl. No.:

8/752174

Inventors:

Michael J. Lyons - Hillsborough NJ

International Classification:

G06F 2900
G06F 700
G06C 702
G08B 100

US Classification:

235 61B

Abstract:

An electronic calculator for determining truck driver log book values including a liquid crystal display. Also included is a conventional numeric keypad having a matrix of numeric keys for allowing the entering of value signals representative of whole numbers upon the successive depression of the numeric keys and subsequent depression of an enter key. Finally, control circuitry is adapted to store a value signal representative of the number of hours a truck driver worked during a day, to display on the liquid crystal display a date corresponding to the day, to display the liquid crystal display the hours the truck driver worked during the day, to automatically calculate and display on the liquid crystal display a sum of the hours worked by the driver during a first amount of previous days, to automatically calculate and display on the liquid crystal display a maximum of allowable working hours minus the sum of the hours worked by the driver during the first amount of previous days, and to automatically calculate and display on the liquid crystal display a sum of the hours worked by the driver during a second amount of previous days.