US3683742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the production of a fuse
Assignee: Dynamit Nobel AG
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Filing: 1970-05-01
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Granted: 1972-08-15
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Expires: 1990-05-01
Abstract
Abstract The present disclosure is directed to a method and apparatus for manufacturing a fuse containing a very fine, dust-like explosive wherein at least one thread is guided through the explosive to facilitate the introduction of said explosive into the fuse casing.
Inventors
- 👤 Wilhelm Rohde
- 👤 Werner Helfgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:48
CPC Classifications
C; C06; C06C; C06C5/00; C06C5/08
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
109 words
A omethod for manufacturing a fuse containing a very fine, dust-like explosive which comprises introducing the explosive from a feeding means into a casing disposed at the discharge end of said feeding means, wherein at least one thread having a roughened surface is deflected from the vertical axis of the feeding means, is guided under tension through the feeding means containing the explosive and is continuously introduced into the casing, together with the explosive, at said discharge end of the feeding means, and wherein amounts of the explosive are entrained in the surface of the thread during the passage of the thread through the feeding means into the casing.
Claim 2
Dependent Claim
109 words
A omethod for manufacturing a fuse containing a very fine, dust-like explosive which comprises introducing the explosive from a feeding means into a casing disposed at the discharge end of said feeding means, wherein at least one thread having a roughened surface is deflected from the vertical axis of the feeding means, is guided under tension through the feeding means containing the explosive and is continuously introduced into the casing, together with the explosive, at said discharge end of the feeding means, and wherein amounts of the explosive are entrained in the surface of the thread during the passage of the thread through the feeding means into the casing.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein about 80 percent of the explosive possesses a grain diameter less than about 0.1 mm.
Claim 4
Dependent Claim
20 words
The method of claim 1, wherein the casing is being continuously manufactured at the lower end of the feeding means.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein the thread is introduced into the feeding means and is guided in a circular manner through said feeding means.
Claim 6
Dependent Claim
60 words
The method of claim 1 wherein the feeding means is a feeding funnel and the thread is guided in a circular manner through the explosive contained in the feeding funnel and in close proximity to the wall of said funnel so that the cone of explosive present in the feeding funnel is continually cut in the proximity of its periphery.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein the thread is made to vibrate.
Claim 8
Dependent Claim
25 words
The method of claim 1 wherein the thread is guided on the circumference of a disk disposed above the upper opening of the feeding means.
Claim 9
Dependent Claim
27 words
The method of claim 1 wherein the thread is attached to the circumference of a disk and is set into motion by the rotation of the disk.
Claim 10
Dependent Claim
13 words
The method of claim 7 wherein the disk reciprocates in the vertical direction.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein the thread is set into circular motion by means of a cam gear.
Claim 12
Dependent Claim
45 words
The method of claim 1 wherein the thread is set into a first circular motion by being drawn from a vertically disposed yarn reel, and a second circular motion is superimposed on said first motion by the movement of the holder of the yarn reel.
Claim 13
Dependent Claim
21 words
The method of claim 1 wherein the thread is twisted from short fibers of synthetic or natural fibers or mixtures thereof.
Claim 14
Dependent Claim
21 words
The method of claim 11 wherein two threads are introduced into different portions of the feeding means containing the explosive material.
Claim 15
Dependent Claim
22 words
The method of claim 1 wherein the explosive is selected from the group consisting of pentaerythritol tetranitrate, trimethylene trinatramine, and mannitol hexanitrate.
Claim 16
Dependent Claim
29 words
The method of claim 1 wherein the explosive in an amount of about 1 to 100 grams per meter of fuse is introduced into the sheath of said fuse.
Claim 17
Dependent Claim
38 words
The method of claim 1, wherein the thread has a smooth surface and including the step of roughening the surface of the thread to enable the entrainment of amounts of the explosive in the surface of the thread.
Claim 18
Independent Claim
94 words
An apparatus for manufacturing a fuse which comprises a feeding means adapted to contain an explosive material, deflecting means for introducing at least one thread, which is deflected from the vertical axis of the feeding means into said feeding means, and means for guiding the thread through the feeding means and continuously introducing the explosive plus the thread into the casing at the discharge end of the feeding means, the thread being provided with a roughened surface for entraining amounts of the explosive during its movement through the feeding means and into the casing.
Claim 19
Independent Claim
94 words
An apparatus for manufacturing a fuse which comprises a feeding means adapted to contain an explosive material, deflecting means for introducing at least one thread, which is deflected from the vertical axis of the feeding means into said feeding means, and means for guiding the thread through the feeding means and continuously introducing the explosive plus the thread into the casing at the discharge end of the feeding means, the thread being provided with a roughened surface for entraining amounts of the explosive during its movement through the feeding means and into the casing.
Claim 20
Dependent Claim
15 words
The apparatus of claim 17 wherein spinning means are provided for continuously manufacturing the casing.
Claim 21
Dependent Claim
41 words
The apparatus of claim 17 wherein the deflecting means is a circular disk disposed above the feeding means and storage reel means are provided for conveying the thread over the periphery of said disk and introducing it into the feeding means.
Claim 22
Dependent Claim
13 words
The apparatus of claim 19 wherein means are provided for rotatiNg the disk.
Claim 23
Dependent Claim
21 words
The apparatus of claim 19 wherein the storage reel means containing the thread is attached to the top of the disk.
Claim 24
Dependent Claim
13 words
The apparatus of claim 17 wherein the deflecting means is a cam gear.
Claim 25
Dependent Claim
21 words
The apparatus of claim 17 wherein the deflecting means are two circular disks, each of which communicate with rotatable storage reels.
Claim 26
Dependent Claim
31 words
The apparatus of claim 20 wherein the rotatable storage reels communicate with a rotatable reel holder, and means are provided for rotating the rotatable storage reels and the rotatable reel holder.
Claim 27
Dependent Claim
22 words
The apparatus of claim 17 including means for vibrating the thread during its passage through the feeding means and into the casing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |