Ammunition and explosives – Igniting devices and systems
Patent
1976-10-18
1978-09-19
Pendegrass, Verlin R.
Ammunition and explosives
Igniting devices and systems
F42B 308
Patent
active
041145372
ABSTRACT:
A trenching charge case having an upper casing part and lower casing part separately injection moulded from an electrically conductive plastics material, and formed with interengaging screw-threads to join the parts together with the cone of the case clamped between them, each of the parts of the casing being nestable with other like parts and the lower casing part comprising a depending wall to stand off the base of the cone from the surface to be excavated.
REFERENCES:
patent: 2797892 (1957-07-01), Ryan
patent: 2984307 (1961-05-01), Barnes
patent: 3348482 (1967-10-01), Keener et al.
patent: 3613582 (1971-10-01), Levamaki et al.
patent: 3771460 (1973-11-01), Ayer
patent: 3777663 (1973-12-01), Brown
patent: 3783788 (1974-01-01), Hayashi
patent: 3972285 (1976-08-01), Brown
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