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Pub. No.:    WO/1980/001015    International Application No.:    PCT/JP1979/000278
Publication Date: 15.05.1980 International Filing Date: 31.10.1979
G09B 5/06 (2006.01), G11B 15/14 (2006.01), G11B 19/02 (2006.01)
Priority Data:
78/134274 31.10.1978 JP
Abstract: front page image
(EN)Magnetic reproducer which uses a magnetic sheet having four circular coaxial magnetic tracks for recording visible information independently divided into four divisions on the front surface thereof and four circular coaxial magnetic tracks for recording voice information relative to the visible information on the back surface thereof. This magnetic reproducer consists of a plurality of preamplifiers (PA) each having a photodetector (PT) and connected respectively to four reproducing heads (H) moving on the respective magnetic tracks to be movable integrally with the respective heads (H), sliding contacts (SR) for connecting these preamplifiers (PA) to one main amplifier (MA), a plurality of light-emitting elements (LED) energized upon operation of four reproduction switches (TS) installed corresponding to the respective items of visible information to face the respective photodetectors (PT), and four energization inhibiting circuits connected to the respective light-emitting elements (LED) and connected to each other. When only the light-emitting element (LED) corresponding to the initially operated reproduction switch (TS) of the four reproduction switches (TS) is energized to allow the photodetector (PT) corresponding thereto to receive the light therefrom, the preamplifier (PA) corresponding thereto is operated.
(FR)Un reproducteur magnetique utilise une feuille magnetique ayant quatre pistes magnetiques circulaires coaxiales d"enregistrement d"informations visibles divisees independamment en quatre divisions sur sa surface avant et quatre pistes magnetiques coaxiales circulaires d"enregistrement de la voie relative a l"information visible sur sa surface arriere. Ce reproducteur magnetique consiste en une pluralite de preamplificateurs (PA), ayant chacun un photo detecteur (PT) connectes respectivement a quatre tetes de reproduction (H) se deplacant sur les pistes magnetiques respectives pour accompagner les tetes respectives (H), des contacts curseurs (SR) pour connecter ces preamplificateurs (PA) a un amplificateur principal (MA), une pluralite d"elements a emission lumineuse (LED) excites par actionnement de quatre commutateurs de reproduction (TS) montes de maniere correspondante aux elements respectifs de l"information visible pour faire face aux photo detecteurs respectifs (PT) et quatre circuits inhibiteurs d"excitation connectes aux elements a emission lumineuse respectifs (LED) et interconnectes. Lorsque seul l"element a emission lumineuse (LED) correspondant aux commutateurs de reproduction actionnes initialement (TS) faisant partie des quatre commutateurs de reproduction (TS) est excite pour permettre aux photo detecteurs (PT) correspondants d"en recevoir lumiere, le preamplificateur (PA) correspondant est actionne.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)