Abstract: An access control device (1) for blocking or opening a passage (2) for persons or vehicles. The access control device comprises one or two blocking bodies (3, 3?), each arranged on a carrier (4, 4?). Each blocking body (3, 3?) comprises a mechanically reversibly deformable element (5, 5?) which, in a first position, is substantially planar and opens the passage (2) and, in a second position, assumes a curved shape which blocks the passage (2). One or both ends of the deformable element (5, 5?) are connected to an actuator (7). A controller controls the deformable element for transferring them first between the first and second positions. When transferring the deformable element from the first to the second position, either the distance between the ends of the respective blocking body is reduced or, when the ends have a constant distance, the length of the blocking body is increased.

Abstract: An access control device (1) for blocking or opening a passage (2) for persons or vehicles. The access control device comprises one or two blocking bodies (3, 3?), each arranged on a carrier (4, 4?). Each blocking body (3, 3?) comprises a mechanically reversibly deformable element (5, 5?) which, in a first position, is substantially planar and opens the passage (2) and, in a second position, assumes a curved shape which blocks the passage (2). One or both ends of the deformable element (5, 5?) are connected to an actuator (7). A controller controls the deformable element for transferring them first between the first and second positions. When transferring the deformable element from the first to the second position, either the distance between the ends of the respective blocking body is reduced or, when the ends have a constant distance, the length of the blocking body is increased.

Abstract: The boarding area (A, B, C) of a transport means is divided into at least two gates (1, 2, 3), the maximum person capacity of which corresponds, respectively, to the maximum capacity of the largest transport device (9) that is accessible via the boarding area (A, B, C). Entrance into the gates (1, 2, 3) is effected via at least one separating device (4) connected with a control system (5) for the purpose of data communication. Entrance into each gate (1, 2, 3) is not possible once the number of persons in the gate (1, 2, 3) specified by the control system (5) for the current boarding operation is reached, or while the persons inside the gate (1, 2, 3) board the transport car. The number of persons in each gate (1, 2, 3) for the current boarding operation is determined by the control system (5) in dependence upon the transport demand in subsequent intermediate stations ahead of an end station, provided such intermediate stations are present, and of the free capacity of the arriving transport car (9).

Abstract: The boarding area (A, B, C) of a transport means (9) is divided into at least two gates (1, 2, 3), the maximum person capacity of which corresponds, respectively, to the maximum capacity of the largest transport means (9) that is accessible via the boarding area (A, B, C). Entrance into the gates (1, 2, 3) is effected via at least one separating device (4) connected with the control system (5) for the purpose of data communication. Entrance into a gate (1, 2, 3) is not possible once the number of persons in the gate (1, 2, 3) specified by the control system (5) for the current boarding operation is reached, or while the persons inside a gate (1, 2, 3) board a transport means. The number of persons in a gate (1, 2, 3) specified for the current boarding operation is determined by the control system (5) in dependence upon the transport demand in subsequent intermediate stations ahead of an end station, provided intermediate stations are present, and of the free capacity of the arriving transport means (9).

Abstract: A tape recorder has a starter knob which is depressed during playback to cause a first memory to store information pertaining to the start of a sequence of sounds which are to be reproduced again. When the knob is released, a second memory stores information pertaining to the end of the selected sequence and the motor of the tape recorder is set to rewind the corresponding portion of the tape, either automatically or on depression of a repeater knob. The information which is stored in the first memory serves to start the motor for playback when the rewinding of that length of tape which bears the selected sequence of sounds is completed, and the information in the second memory serves to initiate rewinding of tape upon completion of renewed reproduction of the selected sequence. The starter knob can be depressed again to change the length of the selected sequence of sounds.