System for displaying a segment, primarily for use in a remote-controlled digital display
AssigneeLafon S.A.
InventorRoland Lagache
Life of this patent
Estimating the term…
Abstract
A system for displaying a segment as applicable in particular to remote-controlled digital display. A control circuit energizes two stationary series-connected electromagnets with pulses of the same polarity so as to produce a magnetic field in each electromagnet. Under the action of the magnetic field, a single permanent magnet rigidly fixed to the segment is capable of displacement between the electromagnets in order to move the segment from a visible active position to a hidden active position.
Claims6
A system for displaying a display segment comprising a support having mounting means extending therefrom, a shaft, serving as a pivot pin, fixed in said support, a relatively thin display segment having a display face for displaying a portion of a character and rotatably mounted on said fixed shaft between two positions one constituting a display position and the other a retracted position, a pair of permanent magnets carried by the display segment on the face thereof opposite the display face, each of said permanent magnets mounted on opposite sides of said fixed shaft near an end of said display segment, electromagnet means of a very low remanence having a core extending perpendicular to the axis of said fixed shaft so that one of said permanent magnets or the other of said permanent magnets may be in contact with an end of said core at any one time, and control means for supplying spaced electrical pulses to said electromagnet whereby the permanent magnet in contact with said one end of said core of said electromagnet means is repelled from said one end causing the other permanent magnet to move toward the other end of said core of said electromagnet means.
Dependencies are inferred from the claim text.