G - Physics – 06 – M
Patent
G - Physics
06
M
340/123.1, 352/2
G06M 1/272 (2006.01) G11B 15/02 (2006.01) G11B 15/54 (2006.01) G11B 27/13 (2006.01) H03K 21/00 (2006.01)
Patent
CA 1089947
ABSTRACT OF THE DISCLOSURE 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 gen- erated 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 incre- mentally 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 indicate the farthest advance of a movable web. When the web is reversed, the counter is decremented from an initial predetermined count. When the web subsequently is moved forward, the counter then is incre- mented. Once the web reaches the farthest advance position previ- ously occupied prior to reverse movement thereof, the counter con- currently reaches its initial, predetermined count.
286427
Dictaphone Corporation (delaware)
Smart & Biggar
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