Site.SEE1968 History
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01 September 2012
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This type of adder is not infrequently referred to as a "Pascal-type" adder, but the mechanism (see below) benefits from three centuries of development and modern materials to allow a much simpler arrangement than Pascale's to achieve what is essentially the same capability. Note that like the Pascale calculator the SEE relies on complementary arithmetic to achieve subtraction.
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This type of adder is not infrequently referred to as a "Pascal-type" adder, but the mechanism (see below) benefits from three centuries of development and modern materials to allow a much simpler arrangement than Pascale's to achieve what is essentially the same capability. Note that like the Pascal calculator the SEE relies on complementary arithmetic to achieve subtraction.
01 September 2012
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For patent data see [[http://www.boelters.de/Rechenmaschinen/Zehneruebertrag/ten_carry_pics/dial-pat.gif]] (viewed on 30 Aug 2012).
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For patent data see [[http://www.boelters.de/Rechenmaschinen/Zehneruebertrag/ten_carry_pics/dial-pat.gif]] (viewed on 30 Aug 2012).
For comparison, the carry-forward mechanism of the Pascaline (which allows the 1 resulting from 9+1 to be added to the next register to the left) is shown below.
%center%%height=200px% http://meta-studies.net/pmwiki/uploads/Misc/PascalineTransferMechanism.jpg
For comparison, the carry-forward mechanism of the Pascaline (which allows the 1 resulting from 9+1 to be added to the next register to the left) is shown below.
%center%%height=200px% http://meta-studies.net/pmwiki/uploads/Misc/PascalineTransferMechanism.jpg
30 August 2012
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%center%%height=200px% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg
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%center%%height=200px% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg
For patent data see [[http://www.boelters.de/Rechenmaschinen/Zehneruebertrag/ten_carry_pics/dial-pat.gif]] (viewed on 30 Aug 2012).
For patent data see [[http://www.boelters.de/Rechenmaschinen/Zehneruebertrag/ten_carry_pics/dial-pat.gif]] (viewed on 30 Aug 2012).
30 August 2012
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Changed line 5 from:
This type of adder is not infrequently referred to as a "Pascal-type" adder, but the mechanism (see below) benefits from three centuries of development and modern materials to allow a much simpler arrangement to achieve the same result.
to:
This type of adder is not infrequently referred to as a "Pascal-type" adder, but the mechanism (see below) benefits from three centuries of development and modern materials to allow a much simpler arrangement than Pascale's to achieve what is essentially the same capability. Note that like the Pascale calculator the SEE relies on complementary arithmetic to achieve subtraction.
30 August 2012
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The SEE calculator was manufactured by the Selective Educational Equipment Corporation in the U.S.A. It was a simple circular dial adding machine made with see-through plastic to illustrate the mechanism.
This type of adder is not infrequently referred to as a "Pascal-type" adder, but the mechanism (see below) benefits from three centuries of development and modern materials to allow a much simpler arrangement to achieve the same result.
30 August 2012
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%center% http://meta-studies.net/pmwiki/uploads/SEE-1.jpg
%center% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg
%center% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg
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%center%%height=200px% http://meta-studies.net/pmwiki/uploads/SEE-1.jpg
%center%%height=200px% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg
%center%%height=200px% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg
29 August 2012
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%center% http://meta-studies.net/pmwiki/uploads/SEE-1.jpg
%center% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg
%center% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg
29 August 2012
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||%center% http://meta-studies.net/pmwiki/uploads/SEE-1.jpg||%center% http://meta-studies.net/pmwiki/uploads/SEE-2.jpg||