Manual Disassembly of the Curta

You can better study the individual parts if you move a few parts out of the way.
Even when parts are completely disconnected they still function, courtesy of the VRML event system :-)

note:

The Curta is a delicate instrument: it can only be taken apart in a certain order.
Re-assembly is only possible in the reverse order.

Dragging the input settings sections down

drag the setting shaft to slide down the setting section

Drag on any part outside the setting levers
Slide the complete section fully down till it snaps in position

Dragging up the crank and clearing plate

move the crank up

Drag on the parts of the clearing plate to move the crank up
Slide the crank all the way up till it snaps in place

Dragging up the results wheels

move the results wheels up

Drag on the results wheels (not the shafts) to move the wheels up
Slide the wheels all the way up till they snap in place
You can move up the results wheels and the turns counter wheels

Pulling up the tens bell

grab the tens bell to lift it up

the transmission shafts spread before the tens bell is lifted out

This is only possible if some other parts are out of the way
- The crank must be fully lifted
- The results wheels of both results and turns counter must be fully lifted
- The settings section must be dragged down as far as possible
Grab the shaft of the tens bell and slowly move it out

Reassembling the Curta

Start with dropping the tens bell in place
Continue to move parts back in reverse order