Time setting and backup device for a battery-driven communicatio

Details Time setting and backup device for a battery-driven communicatio Time setting and backup device for a battery-driven communicatio

1992-12-29

1995-04-11

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

3403111, 365228, 368 10, G08B 522, G11C 1400, G04B 4700

Patent

active

054062721

ABSTRACT:
A battery driven communications terminal, paging receiver, capable of an internal time backup function may be constructed with a manual backup operation in which the internal time is stored to a non-volatile memory in response to user selection of a BACKUP key as backed-up time information; and an automatic backup operation in which the internal time is stored to the memory when the voltage level of a battery is low. If a controller is reinitialized in response to restoration of the source voltage, the backed-up time information, stored as described above, is set as the internal time and displayed.

REFERENCES:
patent: 4323987 (1982-04-01), Holtz et al.
patent: 4763333 (1988-08-01), Byrd
patent: 4779091 (1988-10-01), Oyagi et al.
patent: 4783654 (1988-11-01), Ichikawa
patent: 4786902 (1988-11-01), Davis et al.
patent: 4894649 (1990-01-01), Davis
patent: 4905187 (1990-02-01), Beyers, Jr.
patent: 5239286 (1993-08-01), Komatsuda
patent: 5239679 (1993-08-01), Murai

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