Dalton Adding Machine - Francis WEB

Go to content

Main menu:

Dalton Adding Machine

Virtual Museum > The early ones > More complex adding machines

MODELS OF DALTON
Francis TEYSSIER (2013)

In this document, I didn’t want to repeat the history of Dalton machines, as this was already done in several Web Sites. I wanted to look at the different models, and which keys were available, based on serial numbers, and therefore the years of production.
SERIES A
Example of serial:  21357, 21986
Looking at the serial numbers, this seems to be an early model of the adding machines. The Total and Subtotal key are not on the right side, as in the later models. The most interesting features are the beveled glass, showing the inside of the machine.

Patents
1039130 , 1049057 , 1049093 listed on machine

Serial unknown
According to the repair manual, seems to be made before 1909 because of the large key.


Serial 36964


Serial 37386, 65170, 81413
also shown in an AD from 1920



Serial Unknown


Super Model Class 100
Serial 123812 (non-print key absent),148637, 151641,152837

Serial Unknown

Serial 163013, 170095, 182013,204764

Finally, an overview of the related patents for these machines:
Patent 1039130:


It’s amazing to see the amount of details in the drawings, and having done such drawings during my technology classes, I know it’s a lot of work. Remember they didn’t have 3D software at that time. Patience, meticulous work, and attention to details…

Patent 1049057:


Patent 1049093
What’s interesting in this patent is to see the full keyboard, both letters and numbers. We know that Dalton Adding machines only used 10 keys (numbers), but the technology must have been based on typewriters.


This page has been seen times since August 2015
 
Back to content | Back to main menu