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

• Main Authors: ZAHNER,PETER, PFEIFFER,ULRICH
• Format: Patent
• Language: English; German
• Published: 26.06.1980
• Edition: 3
• 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

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.