The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 1982
Filed:
Sep. 06, 1979
Henry F Hartley, Lowell, MA (US);
Ralph G Schuberth, Bedford, MA (US);
Honeywell Information Systems Inc., Waltham, MA (US);
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.