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     1920     PORTABLE  TYPEWRITERS     P I C T U R E   G A L L E R Y     
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CORONA 3
THE FOLDABLE & PORTABLE TYPEWRITER
L C SMITH & CORONA TYPEWRITERS, INC.
Groton, NewYork / USA (1926)

Back to the older version ...

SN = X 635033





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REMARKS:
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This Model is an interesting "MATHEMATICAL" Version (Custom made ? )
It has special symbols on the hammers ("+", "=", "π" & "square-2")
but the "standard" symbols on its keys ...

Modified TECHNICAL DATA of this newer Model:
============================================
   o  Pica  10 cpi ;  80 cpl
   o  Shift keys added on the right side
   o  Carriage-return / line-feed handle on the left side
   o  Carriage extended one inch, now  9 3/4 "
      (Now fitting business envelopes)

The Trick with RIBBON SPOOLING:
===============================
When operating right, both axles of the ribbon spools turn clockwise.
Both spools have to have the ribbon-ends wound up counter-clockwise.
THE RIBBON TURNS AROUND THE SPOOL WHICH HAS THE TOP-NUT FIXED - THE
OPPOSITE NUT HAS TO BE LOOSE - in order for the ribbon to move ...

RESTORATION Starts:
*******************
Nothing was working.  Discovered after disassembling, that someone
with low skills and bad tools had tried to repair - OhOh!

  (1) Cleaning, bending, oiling, re/placing springs ...
  (2) End-lever of the space-bar lever-system was broken ...
 ----> Temporarily repaired by glueing a hook made of copper-wire!
  (3) Missing a special screw on the left side of the carriage 
      for holding a ratchet lever in place - enables the rubber-
      cylinder to go back to previous lines ...
 ----> Made "the right one" out of a longer screw!
  (4) 12 (too small) ball bearings supported the carrier ...
 ----> Found 8 right ones ( 3/16" ) to exchange!
  (5) To prevent clustering of the ball-bearings ...
 ----> Made a cage out of paper clips!


RESTORATION  S T O P P E D , because MISSING PARTS ...
******************************************************
  (6) 4th carriage-clamp
      (... necessary, because the carriage is shaky ...)
  (7) Left ribbon feed-lever with its screw & spring
      (... enables the ribbon to spool backward ...)

... and  C O N T I N U E D :
============================
" T H A N K S ! "  to the friendly people at ...

      +-------------------------------------------+
      |      >> CALIFORNIA OFFICE MACHINES <<     |
      |              (  Since 1949  )             |
      |           2362  San Pablo Avenue          |
      |        B E R K E L E Y ,  CA 94702        |
      |            Phone (510) 845-3780           |
      +-------------------------------------------+

  ... for giving me the missing parts ...
 ----> to restore its FULL FUNCTIONALITY
      and ...
  (8) the missing black bottom plate under the carriage gears
      and ...
  (9) a front plate with »CORONA« in exchange to my faded-out one
 ----> to restore its ORIGINAL BEAUTY

                   ... Now stored in a new, perfect fitting WOODEN RED BOX  
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   Have a look at the SCM  »GALAXY«  -  60 years later ...

impressum:
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© C.HAMANN        http://public.beuth-hochschule.de/~hamann       09/08/07