Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1990-03-02
1991-07-16
Coles, Sr., Edward L.
Communications: electrical
Condition responsive indicating system
Specific condition
34082544, 324427, 320 48, G08B 2100
Patent
active
050328255
ABSTRACT:
A battery capacity indicator is described which measures the battery terminal voltage at two discharge rates, monitoring the resultant differential battery voltage at predetermined time intervals, and comparing the resultant differential battery voltage to a set of predetermined differential battery voltages which are stored within a memory within the battery powered device. Each of the predetermined differential battery voltages corresponds to one of a set of predetermined battery capacities for each type of battery used in the device. The battery capacity indicator provides to the user a continuous display of the available battery capacity.
REFERENCES:
patent: 4180770 (1979-12-01), Eby
patent: 4888716 (1989-12-01), Ueno
"Bravo" Series Numeric Display Pagers, Theory and Maintenance Manual, publication 68P81047C95-0, published Jul., 1989 in Boynton Beach, Fla. by Motorola, Inc. on p. 2, section I, entitled Battery Check & Monitor.
Coles Sr. Edward L.
Hofsass Jeffery A.
Ingrassia Vincent B.
Koch William E.
Macnak Philip P.
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