Abstract: A loudspeaker mounting frame (1) for an electronic appliance has a central opening for receiving a loudspeaker membrane (24), and a plurality of through holes (11) surrounding said central opening for receiving fixing means (25). The through holes (11) are tapered so as to accommodate the fixing means (25) in varying orientations. Spherical bosses (6) surrounding said through holes (11) are formed at a rear side (5) of the mounting frame (1).

Abstract: An electronic device has a loudspeaker unit and a casing with a support, which receives the loudspeaker unit, and with a wall perpendicular to the mounting direction of the loudspeaker unit in the support. A vibration absorbing body forms a spacer between the loudspeaker unit and the support. An abutment protruding from the wall in the mounting direction contacts the vibration absorbing body.

Abstract: An electronic device comprises a first casing member, a second casing member and a loudspeaker unit adapted to be mounted to the second casing member. The two casing members are designed to be assembled by moving the first casing member towards the second casing member along a given trajectory into a fixing position and fixing it to the second casing member. The loudspeaker unit is held between the first and second casing members.

Abstract: A loudspeaker mounting frame (1) for an electronic appliance has a central opening for receiving a loudspeaker membrane (24), and a plurality of through holes (11) surrounding said central opening for receiving fixing means (25). The through holes (11) are tapered so as to accommodate the fixing means (25) in varying orientations.

Abstract: An electronic device has a loudspeaker unit and a casing with a support, which receives the loudspeaker unit, and with a wall perpendicular to the mounting direction of the loudspeaker unit in the support.

Abstract: An electronic device comprises a first casing member, a second casing member and a loudspeaker unit adapted to be mounted to the second casing member. The two casing members are designed to be assembled by moving the first casing member towards the second casing member along a given trajectory into a fixing position and fixing it to the second casing member. The loudspeaker unit is held between the first and second casing members.

Abstract: Normally, speed control is carried out by police using radar and camera. The speed of a car can also be recorded in a tachograph. According to the invention car speed is controlled and/or limited using driver-specific smart-cards and millimeter wave communications. When a car (13) enters the sector of a new transmitter (11), its card reader receives a signal telling the reader to consider the time information (t.sub.1) received from the transmitter as a starting time. When the car exits this first sector and penetrates the perimeter of a second transmitter (12), the reader receives over the air a second time information (t.sub.2) and other information (v.sub.1, d.sub.1) from which the speed is calculated and recorded within the card reader. The police can check the recorded information by inserting a special card into the reader.

Abstract: An antenna system for receiving radiowaves includes a Lundeburg-type lens which reflects radiowaves to a focal point of the lens. A helical primary feed is located in the proximity of the focal point. Electronic circuitry for processing the radiowaves in a desired manner and the primary feed are supported in a hollow support structure in the proximity of the focal point.

Abstract: Memory cards are cheap and contain memory means, but can be forged and duplicated easily. Smart-cards contain also a microprocessor and can be used for cryptographic purposes, but are much more expensive. The plastic support of the card contains randomly distributed ferrite particles (eg. small steel marbles, introduced into the plastic paste during the melting process). This random distribution of the particles is assumed to be impossible to control or influence during the process of fabrication. For personalizing a card, the issuing authority scans the plastic support of the card with a magnetic inductance detector, thereby reading the emplacement of the ferrite particles as a number p. Then the authority computes s=SIG(ID,p), where "SIG" denotes any secure public-key digital signature algorithm and ID the identification details of the card's owner. Finally, s and ID are recorded in the memory means of the card.