Jaap Scherphuis | The Burroughs Portable adding machine @jaapsch2 | Uploaded July 2020 | Updated October 2024, 2 hours ago.
The Burroughs Portable is a mechanical adding machine first made in 1925. Versions of this machine were developed and produced until the 1960s. This one has a 10-column keyboard. It has a paper feeding mechanism similar to a typewriter, so that it can print in columns on normal sheets of paper.
For more information on this machine and others in my collection, visit my website:
jaapsch.net/mechcalc
0:00 Introduction
0:54 Addition
1:17 Subtotal
1:37 Total
2:03 Non-add
2:37 History
3:25 Tabulation
4:00 Line spacing
4:48 Ink ribbon
5:10 Model variations
6:18 Outro
The Burroughs Portable is a mechanical adding machine first made in 1925. Versions of this machine were developed and produced until the 1960s. This one has a 10-column keyboard. It has a paper feeding mechanism similar to a typewriter, so that it can print in columns on normal sheets of paper.
For more information on this machine and others in my collection, visit my website:
jaapsch.net/mechcalc
0:00 Introduction
0:54 Addition
1:17 Subtotal
1:37 Total
2:03 Non-add
2:37 History
3:25 Tabulation
4:00 Line spacing
4:48 Ink ribbon
5:10 Model variations
6:18 Outro
