A telephone subscriber's card index includes a flat casing having a top, side walls and a front opening, a tray adapted to be pushed into and pulled out of the casing through said opening, and a pile of index cards supported on the tray and intended to have information thereon. The index includes manually operable depressible keys, with dogs on the underside of the keys, for determining, before pulling out the tray, which index card is to be presented to an operator by depression of an optionally selected one of said keys.
The invention relates to a card index which can be fixed to a vertical wall or vertically mounted on a base, in which the index cards are held by means of clamping devices in a receiving compartment formed in covered manner in the upper part of the index casing and are individually released on operating a selection key and transferred into the lower area of the casing provided with a window-like opening for inspection, the cards being secured and locked in the clamping device, so that a reliable release of the selected cards is possible, including those cards made from a material with a smooth surface such as e.g. plastics foil and in which incorrect manipulations are not possible.
