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--- summap20 [2017/05/14 14:49]
clodoveu
+++ summap20 [2017/05/14 18:27] (current)
clodoveu
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 I found the repair of these machines much harder than any other I have. Whether I'll succeed or not in making the square-keytop work or not, remains to be seen. Their mechanism is much smaller, tighter, and apparently not very modular. Suffice to say that the Summa Prima 20 weighs half as much as the Summa 15, its predecessor.
-In May 2017, I finally got around to a revision in the round-keytop one, lubricating critical points, polishing the plastic cover, repainting the keyboard plate, the joystick dial, and the purple bottom.
+Update: In May 2017, I finally got around to a revision in the round-keytop one, lubricating critical points, polishing the plastic cover, repainting the keyboard plate, the joystick dial, and the purple bottom.
 Front view, restored keyboard plate and joystick dial
@@ Line 22: / Line 22: @@
 {{ http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/20170514_Summa_Prima_20_left_side_1.jpg?500 | Left side view after restoration}}
-Left side, notice the restored purple bottom and the overall aspect of the machine, as compared to the smaller picture, showing the right side as purchased.
+Left side, notice the restored purple bottom and the overall aspect of the machine, as compared to the other picture, showing the right side as purchased.
-{{http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/20170514_Summa_Prima_20_left_side_2.jpg?400 | Left side view after restoration }}
+{{http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/20170514_Summa_Prima_20_left_side_2.jpg?350 | Left side view after restoration }}
-{{ http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/SummaPrima20-2.jpg?250 | Right side view, as purchased}}
+{{ http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/SummaPrima20-2.jpg?350 | Right side view, as purchased}}
 Right side
@@ Line 49: / Line 49: @@
 | {{ http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/SummaPrima20-ad1.jpg?200 | Ad 1}} | {{ http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/SummaPrima20-ad2.jpg?200 | Ad 2 }} | {{http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/SummaPrima20-ad3.jpg?200 | Ad 3 }} |
-MORE PICTURES
+**More on this machine**
+[[http://www.aconit.org/histoire/calcul_mecanique/documents/Olivetti_Summa_Quanta_20.pdf | An explanation of the design of the Summa Quanta 20, an electrical machine similar to the Summa Prima 20, a successor to the Summa 15. The calculating principle is the same]]
+[[http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/Olivetti Summa Prima 20 Quick Reference Guide (Spanish).pdf|Olivetti Summa Prima 20 quick reference guide, in Spanish]]
+[[http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/Olivetti Summa Prima 20 User Manual (Italian)|Olivetti Summa Prima 20 User's Manual, in Italian]]
-to appear
 **Have a mechanical calculator stored somewhere, and want to get rid of it? Send it to me!**

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summap20.1494784150.txt.gz · Last modified: 2017/05/14 14:49 by clodoveu

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