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An end-of-page indication for a typewriter is triggered by detecting a match between a stored reference number for indexing operations and a tally of actual indexing operations.
English (United States)
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End-Of-Page Indicator For A Typewriter
An end-of-page indication for a typewriter is triggered by detecting a match
between a stored reference number for indexing operations and a tally of actual
A typewriter suitable for implementing the indicator includes keyboard
apparatus 10 for producing coded character and function representative signals
(Kx) and a printer 12 that responds to command signals (COM) to perform such
operations as printing characters along a line and indexing. An interface 14
preferably receives signals from and sends signals to the keyboard apparatus 10
and the printer 12. The interface 14, in turn, cooperates with a processor 16 and
associated read-only storage (ROS) 18 that act as control logic for the typewriter.
Accessible storage for data, such as text, is provided by a read/write(R/W)
memory 20 that cooperates with the processor 16.
A reference number for indexing operations is preferably caused to be stored
at a location 30 in the memory 20 by a predetermined signal sequence generated
at the keyboard. For example, the processor 16 may be programmed to interpret
signals that are produced by number key depressions at keyboard apparatus 10
and follow a signal produced by depression of a CODE key, as being an indexing
total. Alternatively, the processor may be placed in a teaching mode by, for
example, a signal produced by a TEACH key and count signals produced by the
INDEX key until a TEACH signal again occurs. The fin...