Safety fuse for underwater artefacts
OwnerFernando Almarza Laguna de Rinsinventor
Life of this patent
Estimating the term…
Abstract
A safety fuse for an underwater explosive, including a piston shiftable longitudinally to detonate the explosive, a diaphragm attached to the piston such that pressure on one side of the diaphragm moves the piston to detonate the explosive and ports communicating with one side of the diaphragm and the exterior of the fuse device for transmitting water pressure to that side of the diaphragm, thereby shifting the piston to detonate the explosive; safety devices which must be removed in order to enable water under pressure to contact the one side of the diaphragm; appropriate spring operated means for driving the piston to detonate the explosive; other protective means against inadvertent detonation.
Claims14
Safety fuse for underwater artefacts, comprising:
- a body having an open end;
- a valve head closing said body open end;
- said valve head being secured to said body;
- a diaphragm located in and sealingly dividing said body into a primary and a secondary chamber;
- said diaphragm being deformable to change the relative sizes of said primary and secondary chambers;
- said diaphragm having an annular peripheral flange which is secured inside said valve head;
- said diaphragm having a generally conical shape with a central portion projecting further into said valve head than said diaphragm peripheral flange;
- passages into said valve head from the exterior of said body and communicating into said primary chamber, thereby to communicate the ambient pressure around said safety fuse into said primary chamber;
- a first piston attached to said diaphragm to shift therewith and being mounted and oriented to be movable axially through said body as said diaphragm deforms;
- said first piston being of lightweight construction and being tubular with an axial bore therethrough;
- a second piston axially spaced from said first piston and also being positioned and oriented to be axially movable through said body;
- a compressible spring between said first and said second pistons, which is compressed as said first piston is moved toward said second piston by said diaphragm;
- restraining means for restraining motion of said second piston under the influence of said spring;
- release means connectable with said first piston and located for releasing said restraining means once said first piston has moved a predetermined distance toward said second piston;
- a detonator connectable with said second piston to be moved by said second piston;
- impact means in said body to be impacted upon by said detonator and spaced from said detonator as said second piston is restrained by said restraining means, such that release of said restraining means and of said detonator enables said detonator to impact against the cooperating said impact means to initiate detonation of a charge.
Dependencies are inferred from the claim text.