Abstract: A code locking mechanism that transmits information between a key and a locking mechanism secured against interception misuse, but flexible with respect to original equipment, replacement parts, and emergency functions, is obtained if the key code is, in each case, cryptographically encoded through a hardware encoder. When the locking mechanism is first operated, a control element, inductively coupled to a locking mechanism read-write unit with a new key once and in a non-overwritable manner, transmits an indent number to the object memory. Object-specific identity data are also stored in the control element. With the latter, a key number from a key register of the control element is combined with the key code to read the latter together with a roll-in random code into the set of first still-neutral keys and into the object memory. Thus, a key is valid only if the object-specific identity data are taken into account in its key code.

Abstract: In order to force the cell of an electro-optic display device into a defined position against a stop means rigidly mounted on the housing, for the purpose of zebra-rubber contacting with a pc motherboard rigidly installed in the housing, without obstructing the installation of the cell behind the sight opening of the housing, or without posing the hazard of damaging the sharp glass fracture edges of the glass plates of the cell, at least one leaf-type spring is clamped opposite the stop, such spring supporting itself in the direction of the stop on the edge of a glass plate of the cell, on the one hand, and in the opposite direction against an abutment, on the other hand, such abutment being rigidly mounted on the housing. The spring is punched in the form of a flap with an approximately U-shaped section from the lateral zone of a foil flatly resting against the cell, such flap bridging the free space between the cell and the abutment.

Abstract: Even with a small display area of a hybrid display instrument for the instrument panel of a compact automobile, an optimum presentation of information can be obtained if the display area is limited to approximately the upper half of the instrument housing front panel and the symbolic information displays of fixed and variable symbol cells are rendered by a projection technique in a row along the bottom edge of the display area. In return, the electrical and optical control devices for the cells, and possibly even the system of cells itself, is moved into the lower area of the instrument housing so that these will take up no space in the actual display area. Above the row of symbolic display units, there extends the arc-shaped dial of at least one analog gauge, the pointer drive shaft of which is supported behind (or even below) the display edge for the symbolic information displays.

Abstract: A multi-colored liquid crystal display arrangement, especially for motor vehicle instruments, including colored foils with different colorings spatially associated with a plurality of mutually offset and differing information areas of the display, intermediate a liquid crystal cell and a large-surfaced illuminating arrangement. The multi-colored liquid display arrangement is additionally equipped with a transflector which is positioned between the color foils and the liquid crystal cell, and wherein the transflector incorporates differently colored areas which are spatially associated with predetermined color foils.