Magnetic indicator with capacitor connected coils

Abstract

Abstract An electromagnetically operated indicator having three parallel rotatably mounted indicating elements which are mounted in sideby-side relationship, which may be independently electromagnetically positioned in each of four equiangularly spaced operating positions and which are marked to collectively indicate each of the sequence of characters of 0 through 9. A viewing window formed to provide convex magnifying lenses for enlarging the viewing angle and for magnifying the forward surface portions of the indicating elements is provided in front of the indicating elements and a pair of rearwardly extending electromagnets is provided for selectively and individually positioning each of the indicating elements in each of its four operating positions. The indicator may be modified to include auxiliary magnetic detents for holding the indicating elements in offset angular positions when the electromagnets are deenergized so as to prevent rotational hangup of the indicating elements when the electromagnetic fields are reversed. Alternative antihangup arrangements include a magnetic shunt between the cores of the electromagnets and means for electrically interconnecting the electromagnets for momentarily energizing the ''''inactive'''' electromagnet or operating the ''''inactive'''' electromagnet at a lower level when the other electromagnet is energized.

Inventors

• 👤 Robert P Mccormick

Bibliographic Details