초록 ▼

Blasting signal transmission tube comprising a length of elongated flexible hollow tube and a self-oxidizing combustible substance disposed within the tube for transmitting a blasting signal along the interior of the tube length, the hollow tube having a varying interior axial cross-sectional area a

Blasting signal transmission tube comprising a length of elongated flexible hollow tube and a self-oxidizing combustible substance disposed within the tube for transmitting a blasting signal along the interior of the tube length, the hollow tube having a varying interior axial cross-sectional area at longitudinally spaced intervals along the tube length for reducing and controlling the velocity of the blasting signal. Also, a process for producing signal transmission tube comprising forming a length of elongated flexible hollow tube of predetermined interior cross section area; depositing a self-oxidizing combustible substance within the tube for transmitting a blasting signal along the interior of the tube length without destroying the tube; and introducing a plurality of discrete restrictions reducing the predetermined hollow tube interior cross-sectional area at longitudinally spaced intervals along the tube length for reducing and controlling the velocity of the blasting signal.

대표청구항 ▼

Signal transmission tube comprising a length of elongated hollow tube and a self-oxidizing combustible substance disposed along the interior surface of said tube for transmitting a blasting signal along the interior of said tube length, said tube having mechanical means for controlling blasting sign

Signal transmission tube comprising a length of elongated hollow tube and a self-oxidizing combustible substance disposed along the interior surface of said tube for transmitting a blasting signal along the interior of said tube length, said tube having mechanical means for controlling blasting signal velocity including a plurality of discrete locations of reduced axial cross-sectional area at longitudinally spaced intervals along said tube length for reducing and controlling the velocity of said blasting signal and reduced areas being permanently set, said tube having a continuous open interior passageway throughout its length permitting bidirectional blasting signal transmission therein.