Magnetically operated sign

Claim 1

A SIGN COMPRISING A FRAME, A PLURALITY OF WRITING ELEMENTS EACH HAVING TWO FACES OF CONTRASTING COLOURS, EACH OF SAID WRITING ELEMENTS BEING MOUNTED IN SAID FRAME FOR ROTATION ABOUT ITS AXIS OF ROTATION TO DISPLAY ONE FACE OF EACH ELEMENT AT A TIME, EACH OF SAID WRITING ELEMENTS COMPRISING A DISC, OPPOSED FACES OF SAID DISC COMPRISING SAID FACES, THE FACES OF SAID ELEMENTS BEING ADAPTED TO AT LEAST PARTIALLY DEFINE A DISPLAY PANEL, A MAGNETIC MEMBER CARRIED BY EACH OF SAID WRITING ELEMENTS WITH ITS LONG AXIS SUBSTANTIALLY PARALLEL TO THE PLANE THEREOF AND POLARIZED TO PROVIDE NORTH AND SOUTH POLES AT EACH OF ITS ENDS AND HAVING A MAGNETIC AXIS AT AN INCLINE TO THE AXIS OF ROTATION OF SAID WRITING ELEMENT, AND MEANS ASSOCIATED WITH EACH OF SAID WRITING ELEMENTS FOR CREATING A MAGNETIC FIELD OF FORCE OF PREDETERMINED POLARITY WITH WHICH THE MAGNETIC AXIS OF SAID MAGNETIC MEMBER OF ITS RESPECTIVE WRITING ELEMENT CAN ALIGN THROUGH ROTATION OF SAID WRITING ELEMENT TO PRESENT A PREDETERMINED ONE OF SAID FACES OF EACH OF SAID ELEMENTS FOR DISPLAY IN SAID DISPLAY PANEL, WHEREBY A CONTINUOUS LINE OF SAID FACES OF A LIKE COLOUR CAN BE SET AMID FACES OF A CONTRASTING COLOUR TO MAKE A SIGN, SAID MEANS FOR CREATING A FIELD OF FORCE OF PREDETERMINED POLARITY COMPRISING A COIL THAT TERMINATES IN SPACED APART POLE PIECES AND IS MADE OF A PERMANENTLY MAGNETIZABLE STEEL AND AN ELECTRICITY CONDUCTING WIRE EXTENDING THROUGH SAID COIL FOR CHANGING THE POLARITY OF SAID POLE PIECES.