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
Contacteur electro-magnetique equipe d'un electro-aimant sensible aux surintensites pour provoquer la limitation et la coupure des courants excessifs