Battery switching apparatus included within a timer adapter unit

Details Battery switching apparatus included within a timer adapter unit Battery switching apparatus included within a timer adapter unit

1979-09-06

1982-02-16

Shaw, Gareth D.

Boots, shoes, and leggings

G06F 100

Patent

active

043162460

ABSTRACT:
An adapter includes free running low power clock circuits connected to provide a time of day value accessible by a central processing unit which couples to the adapter through a controller subsystem. The adapter cicuits are constructed on a circuit board which is installed as part of the controller subsystem. The clock circuits are connected to one terminal of a battery power supply whose other terminal connects to an interface connector included within the adapter. Upon installing the adapter board in the subsystem, the battery power supply is connected to provide power for operating the clock circuits. When the adapter is removed from the subsystem, the battery power supply is disconnected, preventing it from discharging. The adapter includes an adapter connector for connecting the output terminal of the battery power supply to enable the battery to be charged or its power level monitored when the adapter circuit board is installed.

REFERENCES:
patent: 3859638 (1975-01-01), Hume, Jr.
patent: 3956740 (1976-05-01), Jones et al.
patent: 4143283 (1979-03-01), Graf et al.

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