Donald W. Garrison - Lancaster PA James T. Hartman - Reading PA
Assignee:
Time Computer, Inc. - Lancaster PA
International Classification:
G04B 1924 G04B 2700 G04C 1900
US Classification:
58 4A
Abstract:
A multi-function LED wristwatch in which all the required functions may be performed with the use of only two push button switches. These switches are time demand for displaying hours, minutes and seconds and date demand for alternatively displaying day of month, month of year, AM or PM of time, and day of week. They also perform all the setting functions for these displays and through sequential button depression and digital logic circuits, five of the functions, namely hours, minutes, day of the month, month of the year, and day of the week may be set independently.
Robert O. Reese - Lancaster PA Donald W. Garrison - Lancaster PA
Assignee:
Time Computer, Inc. - Lancaster PA
International Classification:
G06F 738 G04B 3712
US Classification:
364705
Abstract:
An improved wristwatch calculator has all of the active circuit elements contained on three chips mounted on the same substrate member in the watch case. A watch chip and a calculator chip each have their outputs connected to a single interface chip consisting of CMOS or I. sup. 2 L active elements which multiplex the watch and calculator chip outputs and select the appropriate display as a function of watch mode selection by pushbutton or inertia time demand switches or calculator mode selection by activation of the appropriate calculator keyboard switch on the watch face. The interface chip outputs are connected to six electro-optical display stations.
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