1974-07-10
1976-06-08
Jackmon, Edith Simmons
58 50R, 58 55, 58 585, 58 855, 58 90R, G04B 1924, G04B 3708
Patent
active
039614727
ABSTRACT:
A wristwatch has a plurality of light emitting digital readout elements which are located along one end of the watch above the watchband. A hermetically sealed time capsule is enclosed within the watch case and includes an integrated circuit chip which divides the frequency output of a battery powered quartz crystal oscillator into a series of pulses which are counted and selectively interrogated to provide a series of electrical outputs corresponding to seconds, minutes, hours, days, months and years. The time capsule includes sealed control switches which are actuated by magnets slidably mounted on the case and which provide for selecting different outputs for visual display on the readout elements, corresponding to either hours and minutes, month and day or seconds. The electronic circuitry automatically compensates for 28, 30 and 31 day months as well as for leap years, and the readout may be selected for repetitive 12 hours or 24 hour display. When the 12 hour readout is selected, the AM/PM indicating light is energized when the hours and minutes readout is selected. A solar cell is positioned on the top surface of the watch case and functions to control the intensity of the readout elements according to the intensity of ambient light, as well as to recharge the batteries. The control switches also provide for setting the watch by either changing the minutes output while holding the seconds output at zero, or by changing the hours output without changing the minutes, seconds and days outputs, or by changing the days output without changing the seconds, minutes, hours and months outputs.
REFERENCES:
patent: 3328954 (1967-07-01), Miller
patent: 3672155 (1972-06-01), Bergey et al.
patent: 3782102 (1974-01-01), Bergey
Jackmon Edith Simmons
Ragen Semiconductor, Inc.
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