Small Adding Machines - Francis WEB

Small adding machines were very popular, due to their size, and ease of use. They were mainly used for additions, or subtractions, and could be used also as a cash register for small business.
The principle is always the same, a number of wheels, and the carry over when the number goes past 9.
Here are a few examples:

Note: The pictures are showing the models I own, and for the other models, I found them on Ebay. I showed the models I own with bigger pictures. No copyright violation intended. Just wanted to show what the machines look like, for comparison.

Resulta:
These were made in West Germany, by Paul Bruning Machine Tool Work Company, between the years 1927 to 1969. They came in various flavors, but mostly with either 7 columns or 9. Using a small stylus, you push the wheels corresponding to the number you want to add. There was a lever or a crank to reset all columns to zero.  

KOMET
This model SK looks very similar to the Resulta machines, and works exactly in the same way. This was also a German machine


PRECISE
A different look, but again, same mechanical design: simply move the disks for the numbers you want to add.

METRO
I found this one while browsing the internet. It seems to be a clone of the PRECISE above, unless it's the opposite. But they really look similar


TODD Protectograph Company
A similar adding machine with a lockable cover. The TODD company was manufacturing Check Writer devices, but this one is a real Adding Machine. The Patent I found was under the name of W.B. PAYNE, filed in 1927. You can see a copy next to the machine in PDF format.
  Patent
AMCO
This is where you say: wait a second, isn't this the same as the previous model? Yes indeed, it looks very similar to the TODD.
       
AMCO 9 COLUMNS                                                             AMCO 7 COLUMNS

STAR ADDING MACHINE
another copy of the TODD, however this one has its one patent, even though it is clearly said that it is manufactured by TODD.


here is a copy of the patent for this machine
Patent number 1398068

SUMIT
Note the name, SUMIT, with only one "m", as this means "sum-it". Very similar to the Resulta models, but you don't need a stylus as the wheels can be moved with the finger. Also, were using more plastic parts.

HOFFRITZ


SUMMIRA

SUMMIRA 7                                                            Summira 8 (pounds)     Summira 8 (pounds) and printing

AMERICAN CAN COMPANY

The American is border line between Small Adding Machine and full-size cash register. It's about double the size of the other machines shown on this page, but since it uses the same Wheel mechanism, I added it to this family portrait.
The curious thing is how you need to move the small cursors, instead of moving the wheels. This id described in the next page, showing videos of these machines
Here is a family portrait