Display device with one rheostat

Claim 1

A NOVEL DISPLAY DEVICE COMPRISING A HOUSING CONTAINING A LIGHT TRANSMITTING MIRROR DIVIDING THE HOUSING INTO A FRONT SECTION AND A REAR SECTION, FRONT ILLUMINATING MEANS ADAPTED TO ILLUMINATE SAID FRONT SECTION AND REAR ILLUMINATING MEANS ADAPTED TO ILLUMINATE SAID REAR SECTION, AND LIGHT CONTROL MEANS TO SEQUENTIALLY AND ALTERNATELY BRIGHTEN ONE OF SAID ILLUMINATING MEANS WHILE SIMULTANEOUSLY DARKENING THE OTHER OF SAID ILLUMINATING MEANS, SAID LIGHT CONTROL MEANS COMPRISING A RHEOSTAT INCLUDING A LENGTH OF RESISTANCE EXTENDING FROM A FIRST END TO A SECOND END, A RESISTANCE DIVIDING ARM IN CONTACT WITH SAID LENGTH OF RESISTANCE, SAID ARM BEING ALTERNATELY DRIVEN BETWEEN SAID FIRST AND SECOND ENDS BY REVERSIBLE MOTOR MEANS, MEANS TO SEQUENTIALLY REVERSE THE DIRECTION OF MOVEMENT OF SAID MOTOR MEANS WHEN SAID ARM REACHES ONE OF SAID ENDS, THE RESISTANCE IN THE RESPECTIVELY CIRCUITS OF SAID TWO ILLUMINATING MEANS BEING GRADUALLY VARIED AND ESSENTIALLY DETERMINED BY THE POSITION OF SAID ARM WHEREBY A CYCLE IS PROVIDED WHEREIN AT A FIRST POINT ONE OF SAID ILLUMINATING MEAN BRIGHTENS AS THE OTHER OF SAID ILLUMINATING MEAN BECOMES DARKER UNTIL A SECOND POINT IS ATTAINED, AT WHICH POINT A REVERSAL IN INITIATED SO THAT THE DARKENED ILLUMINATING MEANS WILL START TO BECOME BRIGHTER AS THE BRIGHTENED ILLUMINATING MEANS WILL START TO BECOME DARKER UNTIL SAID FIRST POINT IN THE CYCLE IS ATTAINED.