Precisa 164-12 Electric Printing Calculator
Calculatrice électrique imprimante tout automatique dans les 3 opérations
Druckende elektromechanische Dreispeziesmaschine
Precisa A.G. Rechenmaschinenfabrik, Zürich-Oerlikon, Switzerland.
The 164-12 belongs to the 160 series, which was designed around 1958 by Werner Heinze, then chief designer
at Precisa. The basic model 160 was a two-species machine, which, when equipped with a storage unit, was designated 162.
Dr. Helmut Gelling, who joined Precisa in 1959, revised the entire model range and brought it into production with significant
design improvements. Model 164 went on sale in 1963. Gelling achieved his goal of reducing the number of parts, streamlining
the manufacturing process, and thus reducing the sales price.
Model 164 has a 12-digit setting unit and a 13-digit result and return unit. The two factors used for multiplication
can consist of up to 12 digits in total; the return function handles 11 digits. Multiplication is performed using a simplified
method. Each last printed number is stored in the return mechanism and can be used again as an addend or factor in the next calculation.
The machine also performs calculations below zero and displays negative values in red. Numbers can be stored in the memory unit across
multiple calculations and then reused, for example, as a constant factor.
A total of 264,695 Model 164 machines were produced between 1963 and 1974.
Patente:
• CH 412412 Nach dem Abkürzungsverfahren arbeitende Multiplikationsvorrichtung an einer
Dreispezies-Rechenmaschine.
• US 3268165 Multiplication Device for a Three-Species Calculating Machine.
Operational guide: German.
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