Shock Tube Systems, Inc.

The Ensign-bickford Company

Thomas A Nadeau

Stephen W Bartholomew

John P O'Brien

Timothy J O'Brien

A Jonathan Bawabe

Raymond G Niederwerfer

Ernest L Gladden

Raymond T Overstrom

Percussive signal transmission tubes, of contrasting color, are joined along adjacent longitudinally extending portions by an adhesive bead of polymeric material. The tubes can be separated in the field and are provided on spools without any sheath. A small diameter (0.10 inch) tube can be used to reduce the size of the spool, or increase the length of tubing wound on the spool. An apparatus for assembling the product is also disclosed.

Redundant signal transmission system and development method

Redundant signal transmission system and deployment means

An improved detonator includes a housing having an open end and an opposite, closed end and defining an axially-extending channel of the housing. A cushion element containing at least one aperture is disposed within the channel and is provided with a resilient, pliable and shock absorbent surface for contacting and retaining explosive material at the closed end of the detonator housing. The cushion element has a signal communicating membrane covering its at least one aperture for passage therethrough of an initiating signal to the explosive material. A method for assembling the detonator includes inserting explosive material into the axially extending channel of the detonator housing, inserting a cushion element having a signal communicating membrane into the channel, and pressing the cushion element towards the closed end of the housing for compacting the explosive material between the cushion element and the closed end of the housing.

Cushion element for detonators and the like; apparatus and method of

Growing community of inventors

Granby, CT, United States of America

Thomas A Nadeau