Abstract: The electromagnetic locking apparatus functions on a lock cylinder with a rotor, to whose end is fitted in rotation-restrained manner a driver and a stator surrounding the rotor. It is positioned with respect to the lock cylinder and a control part engageable with the apparatus. The apparatus is characterized in that the locking means (20, 28) have an electromagnet part (20) with a two-part tie rod (401/402) with a return spring (45) acting on one tie rod part and a probe (28) connected to the other tie rod part (402).

Abstract: A metal flat key with depressions arranged in the key shank for receiving radially displaceably tumbler pins located in the lock rotor for use as a mechanical key outside and as a mechanical/electronic key inside a closing means with additional electronic means arranged in the lock cylinder includes a casing (2B, 2A, 20, 21) for receiving an electronic assembly (5) and which is fixed to the key shank (1), the casing simultaneously being used as the key grip (2). The casing (2A, 2B, 20, 12) on the casing side to the key shank (1) has a connecting part (12) for receiving electric contacts (4) between grip (2) and key shank (1).

Abstract: A locking cylinder has contact means with a contact support, including one or more contact elements. Each contact element partially surrounds the circumference and is fixed and secured against axial displacement, but while allowing partial radial movement. A concentric contact guidance member with contact guides for the contact elements is rotatable with respect to a common centre but is fixed with respect to the contact support in the axial direction. The contact elements can be brought into operative connection with these contact guides.

Abstract: A method of static perimetric examination of the visual field of a subject involves presenting to the subject a plurality of spots of light of predetermined stimulus values which constitute a group of statistically ascertained mean thresholds for the age group of the subject. Such light spots are presented in a test field in accordance with a randomly selected pattern which is determined by a computer. The computer records the threshold value of each spot and modifies the corresponding stimulus value of the group by replacing it with the threshold value. The modified group is used for presentation of light spots to the same subject during a future test.

Abstract: Threshold values which are ascertained during successive static perimetric examinations of the visual field of a subject by presenting variable-intensity stimuli to selected points of a test field are permanently recorded in the form of a single graphic display. The printer which makes the permanent record is connected with a computer which controls the sequence of presentation of stimuli during each examination. If the points of presentation of stimuli overlap, the computer ascertains the arithmetic mean of corresponding threshold values which are ascertained during successive examinations or subtracts one threshold value from the other (corresponding) threshold value. Such modified threshold values are also displayed on the record, together with threshold values which are interpolated by the computer between those threshold values which are ascertained during perimetric examination.