Title: Memory mechanism

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Abstract: A memory mechanism for controlling incremental change of informations in a plurality of information systems to be indicated successively in turn. The mechanism comprises actuation means adapted to be actuated in response to an input signal each time said actuation means receives such a signal, a first memory wheel operated by said actuation means to incrementally change the informations in the first system of said plurality of informations systems and having an intermittent transmission means, a first transmission wheel for engaging said intermittent transmission means, a second memory wheel including a second transmission wheel and adapted to incrementally change the informations in the second information system of said plurality of information systems, a first camming portion formed on said first memory wheel, second camming portions formed on said second memory wheel, lever means acting on said first and second camming portions and adapted to be operated during the lever means is in engagement with both said first and a selected one of said second camming portions and operation means operatively connected to said lever means to operate said first memory wheel so as to allow the first memory wheel to effect incremental information change in said first information system independent of said input signal during said lever is operating whereby incremental change of the informations in the first information system is controlled.


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