Abstract: A globe unit includes a globe element having basic geographical indicia thereon and which is supported on a stand unit. The globe unit further includes a plurality of hemispherical covers, each of which has markings thereon which depict geographic, historic, political or scientific information. The covers are releasably mounted on the globe element by means of a tab on the globe element frictionally engaging the covers adjacent to slots in the covers.

Abstract: A display device of the matrix type utilizes coincident current selection of display elements by the provision of row conductors (R) activating row electromagnets (D) and column conductors (C) activating column electromagnets (H). Each display element includes a rotatable vane (S) which is stable in open and closed positions and a permanent magnet (M) co-operates with the electromagnet (D) to urge the vane (S) into the appropriate position.A clutch member in the form of a bar (L) extending from the vane (S) contacts the pole face of an electromagnetic (H) which, when activated, serves to inhibit movement of the vane irrespective of activation of the row electromagnet (D). Thus by pulsing the display row-by-row, the state of the display elements can be set by selective inhibiting of movement in coincident manner of the appropriate vanes (S) by pulsing the respective column conductors.