Electrical apparatus

• US 3,186,115 A
• Filed: 05/31/1961
• Issued: 06/01/1965
• Est. Priority Date: 05/31/1961
• Status: Expired due to Term

• Current Assignee: Arthur H. Johnson, Joachim H. Todt
• Original Assignee: Arthur H. Johnson, Joachim H. Todt
• Inventors: Todt, Joachim H., Johnson, Arthur H.
• Application Number:
  US04/113,851
• Time in Patent Office: 1,462 Days
• US Class Current: 40/449
• CPC Class Codes: G09F 9/375 the position of the elements being controlled by the application of a magnetic field

Claims

1. A DISPLAY PANEL FOR PRODUCING VISUAL IMAGES FOR AN OBSERVER COMPRISING:

A SHEET OF MATERIAL HAVING MAGNETIC PROPERTIES WITH MOVABLE LIGHT REFLECTING ELEMENTS INCLUDING SUPPORTING MEMBERS FORMED THEREWITH;

MAGNETIC MEANS DISPOSED ADJACENT SAID PLURALITY OF MOVABLE LIGHT REFLECTING ELEMENTS AND FIXEDLY HOLDING SAID SHEET IN SANDWICHED RELATION FOR CONTROLLING THE POSITION OF SAID LIGHT REFLECTING ELEMENTS;

A PLURALITY OF MAGNETIZABLE ELEMENTS LOCATED ADJACENT SAID MAGNETIC MEANS AND SAID MOVABLE LIGHT REFLECTING AND ADAPTED TO BE CONTROLLED BY AN EXTERNAL SIGNAL APPLIED THERETO TO CONTROL THE MOVEMENT OF SAID LIGHT REFLECTING ELEMENTS;

A PLURALITY OF IMAGE FORMING CONDUCTORS PHYSICALLY ARRANGED IN THE SHAPED OF THE IMAGE TO BE FORMED FOR CONDUCTING CURRENT IN A FIRST DIRECTION AND INTERCONNECTING CERTAIN OF SAID PLURALITY OF MAGNETIZABLE ELEMENTS IN A PREDETERMINED PATTERN TO PRODUCE AN ADDITIONAL MAGNETIC FIELD TO CAUSE SAID ELEMENTS TO BE MOVED SO THAT LIGHT IS DIRECTED TOWARDS SUCH OBSERVER WHEREBY IMAGES ARE PRODUCED ON SAID PANEL;

AND AN IMAGE ERASING CONDUCTOR INTERCONNECTING ALL OF SAID MAGNETIZABLE ELEMENTS FOR CONDUCTING CURRENT IN A DIRECTION OPPOSITE TO SAID FIRST DIRECTION SO THAT LIGHT IS DIRECTED AWAY FROM SUCH OBSERVER WHEREBY IMAGES ARE ERASED FROM SAID PANEL.