Delay reduction for signal trains triggered by pushbuttons - uses repeated operation of same pushbutton for controlled delay of triggering after last individual triggering, using preset time stage

The pushbutton circuit, for an electronic keyboard, is designed so that, when the same key (T) is operated repeatedly after the last individual triggering during the coarse of a given time stage, the triggering of the signal train is delayed by less than the duration of the original time stage. A se...

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Bibliographic Details
Main Authors ZAHNER,PETER, PFEIFFER,ULRICH
Format Patent
LanguageEnglish
German
Published 26.06.1980
Edition3
Subjects
BASIC ELECTRONIC CIRCUITRY
CORRECTION OF TYPOGRAPHICAL ERRORS
ELECTRICITY
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
PULSE TECHNIQUE
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:The pushbutton circuit, for an electronic keyboard, is designed so that, when the same key (T) is operated repeatedly after the last individual triggering during the coarse of a given time stage, the triggering of the signal train is delayed by less than the duration of the original time stage. A second circuit (SK2) contains two memories (S1, S2) and a device (V) triggering the time delay when the key is operated, and a multiple pulse stage (MI). After the delay time has expired, a pulse appears in the pulse stage and, after the key has opened, the first memory is cleared, whilst the second memory remains set. The circuit is particularly intended for electromechanical typewriter key operation control, related to the individual key pressure values.
Bibliography:Application Number: DE19782855918