초록 ▼

An apparatus is disclosed comprising an electronic wristwatch and a multifunction electronic calculator in a single wrist mountable case having a common display and keyboard. The watch portion of the watch/calculator includes time of day, calendar, stopwatch and alarm functions. Each of these functi

An apparatus is disclosed comprising an electronic wristwatch and a multifunction electronic calculator in a single wrist mountable case having a common display and keyboard. The watch portion of the watch/calculator includes time of day, calendar, stopwatch and alarm functions. Each of these functions can be controlled from the keyboard on the watch/calculator. The electronic calculator portion of the watch/calculator performs the four standard arithmetic functions: add, subtract, multiply and divide; and has an extra storage register. The calculator portion can perform calculations with scalar quantities entered via the keyboard or stored in the calculator as well as calculations with time interval and real time data from the watch portion. During the time that calculations are not being performed the calculator goes into a sleep or inactive mode in order to minimize the amount of battery power used by the watch/calculator.

대표청구항 ▼

A watch/calculator comprising: a keyboard including numerical keys and arithmetic function keys; calculator circuit means connected to the keyboard for accepting numerical entries from the keyboard and for performing arithmetic operations on numerical data in response to actuation of arithmetic func

A watch/calculator comprising: a keyboard including numerical keys and arithmetic function keys; calculator circuit means connected to the keyboard for accepting numerical entries from the keyboard and for performing arithmetic operations on numerical data in response to actuation of arithmetic function keys on the keyboard; display means connected to the calculator circuit means for displaying numerical data; watch circuit means connected to the calculator circuit means and the display means for storing and periodically updating data representing time; and a time entry delimiter key on the keyboard for delimiting the entry of portions of time information from the keyboard where each portion has a different unit and for causing the display of a selected character on the display means between adjacent portions of entered time information when the time entry delimiter key is depressed, wherein the time entry delimiter key is depressed after the entry of a first predetermined number of digits from the keyboard to indicate entry of time information having a first unit by causing the display of a selected character after the first predetermined number of digits and to enable entry of time information having a second unit, and the time entry delimiter key is again depresSed after the entry of a second predetermined number of digits from the keyboard to indicate entry of time information having the second unit by causing the display of a selected character after the second predetermined number of digits and to enable entry of time information having a third unit.