Boots – shoes – and leggings
Patent
1992-04-16
1994-08-23
MacDonald, Allen R.
Boots, shoes, and leggings
364DIG1, 3642735, 320 14, G06F 130, G06F 132
Patent
active
053415035
ABSTRACT:
A digitizer tablet computer has a host processor connected to a service processor which, in turn, is connected to a digitizer controller and to a power subsystem microcontroller. A battery supplies the primary power for operating the computer but the computer is also connectable to an external source of DC power to charge the battery and to operate the computer when it is not running on battery power. The service processor includes a battery gauge the contents of which indicate how much power is left in the battery and how much time remains at the current rate of power consumption before the power runs out. The amount of remaining power in the gauge is determined by keeping track of power consumed, power added, and power lost during off periods. The use of the second derivative of a voltage versus time discharge curve creates a point from which relative accurate estimates can be made of how much longer the computer can be operated.
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Gladstein Leo A.
Jones Christopher D.
Leontiades Kyriakos
Patel Paritosh D.
Petroskey Paul W.
Grosser George E.
International Business Machines - Corporation
MacDonald Allen R.
McKechnie Douglas R.
Sheikh Ayaz R.
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