No. 95435920

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Dalton Model M - Calculator - 1930-1940 - Adder with rack printing and gear wheel with numeric keypad
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€ 75
6 weeks ago

Dalton Model M - Calculator - 1930-1940 - Adder with rack printing and gear wheel with numeric keypad

La macchina da stampa a cremagliera e pignone con tastiera numerica, modello FDM6689, rappresenta un importante traguardo tecnologico degli anni '30. Progettata da Thomas O. Mehan in collaborazione con Thomas V. Brennan, questa macchina è stata commercializzata intorno al 1932. Sorprendentemente presenta ancora il marchio "Dalton", nonostante la Dalton Adding Machine Company fosse stata venduta alla Remington Rand nel 1927. Dal punto di vista meccanico, la Dalton è un'addizionatrice a 9 colonne, in grado di scrivere e dotata di un display totalizzatore. Per la sottrazione, utilizza i complementi a 9 e dispone di un indicatore frontale inizialmente posizionato in modo scomodo, con azzeratore delle cifre inserite. Successivamente, questo indicatore fu migliorato con l'introduzione di un più pratico indicatore superiore. La produzione è durata fino al 1935. Conservata originale - vedere foto che sono parte integrante della descrizione

No. 95435920

Sold
Dalton Model M - Calculator - 1930-1940 - Adder with rack printing and gear wheel with numeric keypad

Dalton Model M - Calculator - 1930-1940 - Adder with rack printing and gear wheel with numeric keypad

The rack-and-pinion printing machine with a numeric keypad, model FDM6689, represents an important technological milestone of the 1930s. Designed by Thomas O. Mehan in collaboration with Thomas V. Brennan, this machine was marketed around 1932.

Surprisingly, it still bears the "Dalton" brand, despite the Dalton Adding Machine Company being sold to Remington Rand in 1927.

From a mechanical point of view, the Dalton is a nine-column addresser capable of writing and equipped with a totalizer display. For subtraction, it uses the 9's complement and has a front indicator initially positioned in an awkward way, with a reset for the entered digits. Subsequently, this indicator was improved with the introduction of a more practical upper indicator.
The production lasted until 1935.

Original conserved - see photos that are an integral part of the description.

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