Adding machine, c.1910

Made:
c.1910 in Dresden and Germany

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Science Museum Group Collection
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S & N adding machine by Seidel & Naumann, Dresden, serial no. 2398, in fitted box with stylus and instructions. The Seidel and Naumann adding machines used chain drives and a stylus. The numbers to be added were pulled down to the base bar and then appeared in the result window. Pressing the lever A allowed the inputted figures to be checked before the machine reset, while pressing M allowed faster work as each figure reset when the stylus was removed. Subtraction was performed using the complementary columns at the sides.

Details

Category:
Mathematics
Object Number:
1990-461
Materials:
felt, metal (unknown) and steel (metal)
Measurements:
overall (Adding Machine): 50 mm x 80 mm x 210 mm, 1.4 kg
type:
adding machine (stylus) and adding machine (stylus) and adding machines (stylus)
credit:
Val. Devroede

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