Electro-mechanical sign structure with alternating faces formed by several adjacent dihedral angles

An electromechanical sign structure comprising a frame, several adjacent dihedral angles contained inside said frame, means connected to said dihedral angles for rotating said angles back and forth in an angular motion to alternately exhibit each of the two faces of all the dihedral angles synchronously at the front of the frame, thus forming a continuous surface on which a sign or message has been placed, means in the frame supporting said rotating adjacent dihedral angles, said rotating means including a series of angle gears and pinion gears, a pinion gear being mounted on each of the dihedral angles, a rotary transmission shaft supporting the angle gears to transmit a rotational motion to said angle gears to thereby transmit a synchronized back and forth rotational movement to said dihedral angles to allow the sign formed by the adjacent faces to remain stationary for several seconds in the frame, means to stop the back and forth angular motion only when dihedral angles have completed their predetermined entire angular stroke, means to optionally illuminate the faces of said dihedral angles, said electromechanical sign structure further including a clock mechanism, means to support said clock mechanism, rearwardly of said dihedral angles, said mechanism having a clock hands shaft protruding through and between two dihedral angles disposed forwardly thereof to the front face of the frame, clock hands attached to the shaft forwardly of the front face means to exhibit the numerals of the clock face on the front of the sign.