Dear Sirs

I shoot with my Crown during dance meetings, I use the classic Graflite 3 cells.
Sometimes I do portraits so I have a necessity of another light source freely movable.
I think that a flash (slave?) feed by a battery (I don't want to use ballroom sockets) can be the right solution, of course I prefer 1940s outfits.
I don't know with what name look for it.

Massimo

http://www.cameramanuals.org/flashes_meters/graflite.pdf
covers the Graflite and accessories. It is simply called extension.
The service manual for the Graflite is available here:
http://www.southbristolviews.com/pics/Graphic/manual-pdf/GrafliteService.pdf

Thank you, there is one with a clamp to fix everywhere...

Just bought a Graflex flash with clamp and long cord...