Electronic typewriter with automatic power-off device

Claim 1

An electronic typewriter with an automatic power off device, comprising a main switch for manually turning ON and OFF power to said typewriter; a printer having a print head capable of moving along a printing line of a recording sheet; a keyboard having an arrangement of character keys, function keys and other keys for entering code data corresponding to said keys; memory means for storing various code data entered from said keyboard; control means for controlling said printer, said keyboard and said memory means; a counter under the control of said control means and adapted to be counted up at fixed time intervals and to be cleared each time data is entered by keying operation of said keyboard; means under the control of said control means and responsive to said counter for setting an automatic power off mode wherein operation of said printer and said keyboard are turned off in response to the content of said counter reaching a predetermined value while continuing operation of said memory means and said control means; and means under the control of said control means and responsive to manual sequential OFF and then ON operation of said main switch during said automatic power off mode for cancelling said automatic power off mode, and for resetting said typewriter including said printer and said memory to a status existing prior to setting of said automatic power off mode, and for activating said typewriter including said printer and said keyboard.