Pyrotechnic device
AssigneeJ.E.M. Smoke Machine Company
InventorNigel Morris
Life of this patent
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Abstract
A pyrotechnic device comprises a receptacle which contains a charge of pyrotechnic material and an electric fuse to initiate the charge. The receptacle is formed of a plastics housing which has an area formed of lines of weakness adapted to rupture on activation of the pyrotechnic material and a closure having an integrally moulded projection which defines a screw-thread, electric contacts being associated with the projection and trapping the bared ends of wires associated with the fuse.
Claims14
Pyrotechnic device comprising:
- a receptacle;
- the receptacle containing a charge of pyrotechnic material and means to initiate the charge;
- the receptacle being sealed, but having part thereof provided with lines or areas of relative mechanical weakness operative to rupture on activation of the pyrotechnic material;
- the lines or areas of relative mechanical weakness being located to define regions which lie between said lines or areas of mechanical weakness;
- the regions being connected to the rest of the receptacle by material not intersected by a line or area of mechanical weakness;
- and
- the regions being deflected subsequent to rupturing of the lines or areas of relative mechanical weakness so as to open the receptacle,
- the receptacle thus opening with no parts or fragments becoming separated from the rest of the receptacle.
A pyrotechnic device comprising a two-part receptacle, the two parts each being moulded of a plastics material and being secured together to hermetically seal the receptacle, the receptacle containing pyrotechnic material and a fuse to ignite the pyrotechnic material, there being an integrally moulded projecting portion on one of the parts, the portion defining a screw-thread thereon, and being provided with two separate metallic contacts which are in electrical contact with the fuse.
A pyrotechnic device comprising a two-part receptacle formed of plastics material, the two parts being secured together to haermetically seal the receptacle, the receptacle containing pyrotechnic material and a fuse to ignite the pyrotechnic material, the fuse being electrically connected to two contacts forming part of a projecting screw-threaded arrangement on the exterior of the receptacle, part of the receptacle being provided with one or more lines or areas of relative mechanical weakness adapted to rupture when the fuse is operated to activate the pyrotechnic material.
Dependencies are inferred from the claim text.