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Heinz Nixdorf MuseumsForum Rechenmaschinen und Rechenhilfsmittel [E-1994-0667]

Abakus Soroban für Blinde, Typ >4+1

Abakus Soroban für Blinde, Typ >4+1 (Heinz Nixdorf MuseumsForum CC BY-NC-SA)
Provenance/Rights: Heinz Nixdorf MuseumsForum (CC BY-NC-SA)


Japanischer Abakus.
15-reihiger Soroban aus Holz. Anstelle der sonst üblichen Keta mit Kugeln, sind hier kleine Plättchen zum Kippen.
Der Abakus ist ein ideales Rechenhilfsmittel für Blinde.
Das Modell entspricht dem Typ >4+1< Kugeln, der sich um etwa 1930 in Japan durchsetzte.
Tokyo School for the Blind

Material / Technique


Measurements ...

HxBxT: 2 x 23,3 x 8,3 cm

Created ...
... when
... where

Relation to time ...


[Relation to time] [Relation to time]
1920 - 1939
Created Created
1919 1941

[Last update: 2019/02/13]

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