Importance

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Abstract

A blasting cap to primer adapter permits the use of any size of a blasting cap and associated shock tube in combination with commercially available primers and detonating cords. In one embodiment, a bracket arrangement and cord tunnel assembly having a plurality of tunnels is employed attachable to a primer having a tunnel through which an associated blasting cap shock tube may be looped, while a length of detonating cord may be similarly directed through the tunnel assembly of the adapter. An ignition of the detonating cord will result in a concurrent ignition of the shock tube to effect the desired explosion of the primer. Through this construction, any number of primers and blasting cap arrangements can be attached to and ignited by a single detonating cord. Other embodiments of the invention are directed strictly to cord tunnels in adapters which dispense with a retaining bracket, such tunnel adapters being retained in position against a primer by the interweaving of an associated shock tube through the adapter and primer tunnels, with the blasting cap being retained in the available cap well on the primer. A final embodiment envisions an integral construction which includes the cord tunnel adapters being manufactured in an attached relationship to the primers, while the detonating cord may be constructed in the form of a pigtail which is in direct communication with the explosive contained in the interior of the primer.

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First Claim