Site.Adder1908 History
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Provenance: ex “Dunottar Collection” of the late David Gamble, 2014.
(Text reads “The Adder” “Registered Trade Mark”)
(Text reads “The Adder” “Registered Trade Mark”)
The UK Patent for The Adder was applied for by Arthur J. Postans as inventor on 1 December 1904 - see UK Patent Application GBD190224868.
The UK Patent for The Adder was granted to Arthur J. Postans as inventor on 1 December 1904 - see UK Patent Application GBD190224868.
The US Patent for The Adder was granted to Arthur J. Postans as inventor on 11 April 1905 - see US Patent 786839. (NB this is a 1 MB file).
The US Patent for The Adder was granted to Arthur J. Postans as inventor on 11 April 1905 - see US Patent 786839.
The US Patent for The Adder was granted to Arthur J. Postans as inventor on 11 April 1905 - see UK Patent Application GBD190224868. (NB this is a 1 MB file).
The US Patent for The Adder was granted to Arthur J. Postans as inventor on 11 April 1905 - see US Patent 786839. (NB this is a 1 MB file).
The Adder was a 3 digit adding machine which added one digit at a time via a ten key keyboard. It was designed by Arthur James Postans (1867–1940), a British engineer from South Kensington, London, England. he first applied for a British Patent (along with patents in a number of other countries) in 1902 and later received patents for similar machines in Sweden, Switzerland and Canada as well as improved designs in the UK.1 According to Martin, the production of The Adder began in 1908 and ended in the 1920s.2
The Adder was a 3 digit adding machine which added one digit at a time via a ten key keyboard. It was designed by Arthur James Postans (1867–1940), a British engineer from South Kensington, London, England. He applied for a British Patent (along with patents in a number of other countries) in 1904 and later received patents for similar machines in Sweden, Switzerland and Canada as well as improved designs in the UK.3 According to Martin, the production of The Adder began in 1908 and ended in the 1920s.4
Patent
Patents
The US Patent for The Adder was granted to Arthur J. Postans as inventor on 11 April 1905 - see UK Patent Application GBD190224868. (NB this is a 1 MB file).
The UK Patent for The Adder was applied for by Arthur J. Postans as inventor on 1 December 1904 - see UK Patent Application GBD190224868.
As with the other adders in this collection, the adding was done one digit at a time, but in this case with the elaborated possibility also of adding 10. (To add 30 the 10 key would be depressed three times). On the left is a clearing lever which resets the machine to zero in all three windows.
As with the other adders in this collection, the adding was done primarily to the right hand column, but in this case with the elaborated possibility also of adding 10. (To add 30 the 10 key would be depressed three times). On the left is a clearing lever which resets the machine to zero in all three windows.
The Adder was a 3 digit adding machine which added one digit at a time via a ten key keyboard. It was designed by Arthur James Postans (1867–1940), a British engineer from South Kensington, London, England. he first applied for a British Patent (along with patents in a number of other countries) in 1902 and later received patents for similar machines in Sweden, Switzerland and Canada as well as improved designs in the UK.5
The Adder was a 3 digit adding machine which added one digit at a time via a ten key keyboard. It was designed by Arthur James Postans (1867–1940), a British engineer from South Kensington, London, England. he first applied for a British Patent (along with patents in a number of other countries) in 1902 and later received patents for similar machines in Sweden, Switzerland and Canada as well as improved designs in the UK.6 According to Martin, the production of The Adder began in 1908 and ended in the 1920s.7
The instruction brochure for the machine is shown below:
As with the other adders in this collection, the adding was done one digit at a time, but in this case with the elaborated possibility also of adding 10. (To add 30 the 10 key would be depressed three times). On the left is a clearing lever which resets the machine to zero in all three windows.
Patent
Instruction brochure.
The instruction brochure for The Adder is shown below:
(:title Adder ~1908 single column adding machine, serial no. 1306:)
(:title The Adder ~1908 single column adding machine, serial no. 1306:)
(:title Adder ~1908 single column adding machine, serial no. 1306:)
http://meta-studies.net/pmwiki/uploads/AdderW.jpg
The Adder was a 3 digit adding machine which added one digit at a time via a ten key keyboard. It was designed by Arthur James Postans (1867–1940), a British engineer from South Kensington, London, England. he first applied for a British Patent (along with patents in a number of other countries) in 1902 and later received patents for similar machines in Sweden, Switzerland and Canada as well as improved designs in the UK.8
The instruction brochure for the machine is shown below:
http://meta-studies.net/pmwiki/uploads/Adder-instructions-p.1AW.jpg
http://meta-studies.net/pmwiki/uploads/Adder-Instructions-p.2W.jpg
1 The Adder, http://history-computer.com/CalculatingTools/Gadgets/Adder.html, viewed 26 May 2014 (↑)
2 Ernest Martin, The Calculating Machines (a translated reprint of Die Rechenmaschinen, 1925), The MIT Press Cambridge, Massachusetts London, England, and Tomash Publishers Los Angeles and San Francisco, 199, p. 200. (↑)
3 The Adder, http://history-computer.com/CalculatingTools/Gadgets/Adder.html, viewed 26 May 2014 (↑)
4 Ernest Martin, The Calculating Machines (a translated reprint of Die Rechenmaschinen, 1925), The MIT Press Cambridge, Massachusetts London, England, and Tomash Publishers Los Angeles and San Francisco, 199, p. 200. (↑)
5 The Adder, http://history-computer.com/CalculatingTools/Gadgets/Adder.html, viewed 26 May 2014 (↑)
6 The Adder, http://history-computer.com/CalculatingTools/Gadgets/Adder.html, viewed 26 May 2014 (↑)
7 Ernest Martin, The Calculating Machines (a translated reprint of Die Rechenmaschinen, 1925), The MIT Press Cambridge, Massachusetts London, England, and Tomash Publishers Los Angeles and San Francisco, 199, p. 200. (↑)
8 The Adder, http://history-computer.com/CalculatingTools/Gadgets/Adder.html, viewed 26 May 2014 (↑)