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US 4,541,044 AGranted
Loop transmission with back-up power supply for the interface
AssigneeCanon Kabushiki Kaisha
InventorTakehiko Shibata
Life of this patent
Estimating the term…
Abstract
An information transmitting apparatus having plural terminal units connected in a loop-shaped transmission channel, in which the signal transmission is maintained even in the event of a failure of power supply to a terminal unit, by effective use of back-up power supply according to the state of function of terminal units.
Claims6
An information transmitting system comprising a plurality of terminals and an information transmitting channel for transmitting information between said terminals, wherein each of said terminals comprises:
- information processing means;
- an interface for connecting said information processing means with said information transmitting channel;
- and
- a back-up power source for initiating supply of electric power at the beginning of each period in which said information processing means is inoperative but the information processing means of another said terminal connected to said information transmitting channel is operative.
1 more element
Dependencies are inferred from the claim text.