Donald B Garrison

US Patent:

41062779, Aug 15, 1978

Filed:

Feb 23, 1977

Appl. No.:

5/771096

Inventors:

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.

US Patent:

41019636, Jul 18, 1978

Filed:

May 25, 1977

Appl. No.:

5/800158

Inventors:

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.