Abstract: A magnetic head for use in a magnetic reproduction device has a substrate in which a groove is provided. Provided on one wall of the groove is a magnetic field-sensitive element which is preferably positioned normal to an associated recording medium for coupling to the magnetic head.

Abstract: Apparatus for indicating the farthest advance position of a bi-directionally movable medium is provided with a pulse generator mechanically coupled to the medium to generate pulses corresponding to incremental movements of the medium in either a first or second direction. The actual direction in which the medium moves is represented by respective first and second signals. A counter incrementally changes its count in response to each generated pulse when the medium moves in, for example, the second direction, and the counter reverses the direction in which it counts when the medium moves in the first direction following medium movement in the second direction so that the counter incrementally is restored to an initial count. Once the initial count of the counter is restored, an output farthest advance signal is produced indicating that the medium has reached its farthest advance position. In one embodiment, the apparatus is used to indicte the farthest advance of a movable web.