Abstract: A magnetic field sensor for measuring the rotational speed of a rotating gear component is disclosed. The sensor includes a Hall probe, at least one permanent magnet and housing. The Hall probe is arranged in the influence area of the magnetic field of the permanent magnet. The intent is to produce the magnetic field sensor in a less complex manner. This is achieved by virtue of the fact that the permanent magnet is secured to the housing. One particular advantage of the device is that it is extraordinarily robust and is only slightly sensitive to vibrations.

Abstract: The invention relates to a magnetic field sensor, particularly for measuring the rotational speed of a rotating gear component, comprising a Hall probe (3), at least one permanent magnet (4) and a housing (2), said Hall probe (3) being arranged in the influence area of the magnetic field of the permanent magnet (4). The aim of the invention is to provide a magnetic field sensor which can be produced in a less complex manner. This is achieved by virtue of the fact that the permanent magnet (4) is secured to the housing (2). One particular advantage of the device is that it is extraordinarily robust and is only slightly sensitive to vibrations.

Abstract: A device for receiving data cards, including an essentially square-shaped housing; a guide chute for the data cards, the housing having a loading/output slot which forms an access to the guide chute; arrangement for read-in and readout of data from the data cards; mechanism for locking and unlocking the data cards, including a movable stop provided so as to cooperate with an end side of a loaded data card pointing inwards into the device; a gear connection for connecting the at least one latch with the movable stop; and a safety catch engageable with the geared connection, the at least one latch being arranged so as to embrace an outwardly pointing end side of the data card when the data card is in an end position in the device, the geared connection including a slide having one end connected to the movable stop for the inwardly pointing end side of the datacard, and a second end provided with a set of teeth the latch having a toothed quadrant and being rotatable supported and meshing with the set of teeth of