Czech Blasting Cap Machine The DEOS 25 and 50 electrical blasting machines are hand-operated, low-tension electric generators. Each machine consists of a case which houses a steel magnet, armature and gear assembly.
A shaft projecting from the gear assembly is turned by a T-shaped wooden handle, hand crank inserted through a hexagonal nut in the cover. Opposite this nut are two terminals. The DEOS 25 is capable of detonating up to 25 electric caps wired in series through a maximum external resistance of 110 Ohms. The DEOS 50 is capable of detonating up to 50 electric caps wired in series through a maximum external resistance of 300 Ohms.