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B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
B61L23/002—Control or safety means for heart-points and crossings of aerial railways, funicular rack-railway
B61L23/005—Automatic control or safety means for points for operator-less railway, e.g. transportation systems
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FR443113D1911-08-101912-04-29Perfectionnements apportés aux systèmes pour recueillir et distribuer les lettres, colis et articles analogues
ExpiredFR443113A
(fr)