Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
B61L5/20—Audible signals, e.g. detonator audible signalling
B61L5/203—Detonators; Track mounting means; Composition of the detonative product
Instrument zum Signalisiren der Barometerschwankungen und der damit in Verbindung stehenden Exhalation von Grubengasen in den Steinkohlengruben, genannt Signal-Barometer
Einrichtung zum Ausschalten von elektrischen Schaltern, die einen Betaetigungszylinder mit Kolben besitzen, in Abhaengigkeit vom Ansprechen einer Schmelzsicherung