Ammunition and explosives – Igniting devices and systems – Fuse cord
Reexamination Certificate
2000-04-24
2001-11-20
Jordan, Charles T. (Department: 3644)
Ammunition and explosives
Igniting devices and systems
Fuse cord
Reexamination Certificate
active
06318271
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to fuse igniter adapters and more specifically, to a fuse igniter adapter assembly that adapts various fuse cord sizes to various firing devices.
2. Description of Prior Art
An important fuse utilized in the explosives, ordinance and demolition community is fuse cord, used to initiate high explosive detonators. Fuse cord commonly comprises a woven fabric tube of reinforced with wrappings of fiber or metal, and impregnated with asphalt and wax. Filled at its core is a high burn rate material. The type of flammable used and the diameter of the cord determines the rate at which it burns. The cord functions as a conduit of detonative energy.
With the large variety of commercial and military types of fuse cords, there is a difficulty in the prior art regarding a device for adapting various fuse cord sizes to various firing devices. This is especially true for the diameter size 0.107 to 0.150 for which no useable adapter is available. While the prior art has reported using fuse cord, none have established a basis for a specific apparatus that is dedicated to the task of resolving the particular problem at hand. What is needed in this instance is a fuse igniter adapter assembly that adapts various fuse cord sizes to various firing devices.
SUMMARY OF THE INVENTION
It is therefore one object of the invention to provide a fuse igniter adapter assembly that adapts various fuse cord sizes to various firing devices.
According to the invention, there is a fuse igniter adapter assembly that adapts various fuse cord sizes to a firing device for ignition of the fuse cord by a primer. A hub subassembly includes an adapter segment, a deflector segment, and a blade retaining segment. The adapter segment includes means for releasable connection to the firing device and a cavity for insertion of the primer. The deflector segment includes a shield, frustro-conical in shape, radiating outward thirty degrees from the radial axis for blast deflection. There is also included an annulus immediately following and within the shield including four exhaust ports in communication with said axial passage for blast exhaust. A diverter element immediately following said annulus on said radial axis diverts exhaust from a blade retaining section and functions as a spring stop. The blade retaining segment after said deflector segment includes four blade slots each with a blade passage along said planer axis to hold four retaining blades.
Each retaining blade is elongated and inserted within the blade slots. A retaining blade includes a bowed textured edge, a rounded end, and a pointed end. The bowed sharpened edge is sildingly held within the blade passage and said rounded end and pointed end in-between a slide element and cap element respectively. A spring is present for spring compression of said circular slide element against the pointed ends. Releasably held about a radial groove at the end of the assembly is a snap ring providing a stop for the circular cap element.
The primer is inserted into the cavity and a firing mechanism releasably attached. The circular slide element is pulled rearward, overriding the spring and thus releasing the four retaining blades to allow insertion of the fuse cord. The circular slide element is released allowing spring compression to hold the bowed textured edges to releasably hold the fuse cord in place. The firing mechanism is actuated thereby striking the primer, which ignites the fuse and gases escapes from the radial passage through the exhaust ports.
REFERENCES:
patent: 4660472 (1987-04-01), Stevens
patent: 5299500 (1994-04-01), Lindquist et al.
patent: 5327835 (1994-07-01), Adams et al.
Bashore Alain L.
Holford John E.
Jordan Charles T.
Lee Milton W.
Lofdahl Jordan
LandOfFree
Fuse igniter adapter assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuse igniter adapter assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuse igniter adapter assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2585241