|Publication number||US2253549 A|
|Publication date||Aug 26, 1941|
|Filing date||Jul 25, 1938|
|Priority date||Jul 25, 1938|
|Publication number||US 2253549 A, US 2253549A, US-A-2253549, US2253549 A, US2253549A|
|Inventors||Barton Thomas E|
|Original Assignee||Barton Thomas E|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (5), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
26, 1941- T. E. BARTON BLASTING FUSE ANCHOR Filed July 25, 1958 I'NVENTOR.
Patented Au ze, 1941 'QUN ED if STATE PATENT orramis -z BLASTING FUSE ANCHOR Thomas E. Barton, Littleton, Colo. Application July 25, 1938, Serial No. 221,137
1' Claim. (Cl- 1022-43) This invention relates to a blasting fuse anchor,
that is, a device for anchoring a detonator or the firing extremity of a blasting fuse in an 1- explosive charge.
At presen dynamite is primed by unwrapping one extrem ty of the cartridge, inserting the capped fuse, and then tieing the wrapper about The principal object of this invention is to fangs l3 to the fuse in the usual manner, as shown at l2. When forced into dynamite cartridges such as indicated at II in Fig. 5, the fangs l3 expand therein to resist withdrawal of the fuse.
.Dynamite cartridges are wrapped in a rela-' tively stiff,-water-proof paper covering l5 which is folded inwardly at the extremities of the stick. The cap can be easily forced through the inwardly folded extremity of the wrapper and the latter will cooperate with the fangs 13 to prevent withdrawal of the cap and fuse.
provide automatic means for holding the fuse,
cap. or wires in place which eliminate unwrap? I ping the cartridge, tieing the fuse, or lacing the wires and yet; which will provide a positive and secure anchor for the fuse or detonator.
Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efllciency.
.These'will become more apparent from the following description.
In the following detailed description of the invention reference is had to the accompanying drawing which forms a part thereof. Like nu- J merals refer to like parts in all views of the drawing and throughout the description.
In the drawing: I
Fig. 1- illustrates the invention combined as an integral part of the usual fuse cap.
I Fig. 2 illustrates the invention as an independent member used in combination with a fuse cap.
Fig. 3 illustrates the invention as applied to a fuse without the cap.
Fig. 4 ,is an end view of the anchor member taken on the line 4-4, Fig. 3.
Fig. 5 illustrates the combined cap and anchor in place in a dynamite stick.
Fig. 6 illustrates the anchor in place in a pellet powder cartridge.
In the drawing a typical blasting fuse is designated by the numeral ,l 0 and a typical blasting cap by the numeral It. The invention may be constructed, as illustrated, either as an independent device or as a part of the usual detonating blasting cap.
In Fig. 2, the improved anchor is illustrated as an independent member used in combination with the usual blasting cap it. This form of the device consists of a tubular sleeve H which may be crimped to the fuse, as shown at [8, by one of the usual cap crl npers or otherwise secured thereon. The sleeve I! is formedwith a series of locking fangs or tongues l9 similar to the previously described form. The independent form is inserted in the cartridge similarly to the combination form previously described. The independent form can also be used, however, with powder charges which do not require a detonating cap. In such a use, the sleeve I1 is crimped to the fuse, as shown in Fig. 3, and the extremity of .the fuse is forced into the powder cartridge where the fangs i9 expand to resist withdrawal thereof. It can also be used with loose powder poured in the drill hole since the fangs will prevent withdrawal of the fuse through the powder, tamping and wadding in the hole. It has also been found valuable for use with the cored powder or pellet powder cartridges, such as illustrated at 20 inFig. 6. 'The latter cartridge consists of a string of pressed powder cakes havin a central passage or core and wrapped in a wrapper 2|. To prime the cartridge the fuse is pushed through the end wrapping into the core of the cakes 20 where the fangs l6 expand to I engage the walls thereof and hinder withdrawal.
While the invention has been described as particularly applicable to blasting fuses,. it is .desired to be understood that in cases where electric blasting .capsor squibs areu'sed, the improved anchor can be applied to the ignition wires adjacent the cap similarly to its applicato snugly engage the fuse the latter can be forced through the sleeve and the latter will remain in position without the necessity for crimping. If-
made of metal a non-ferrous. non-spark-producabout the fuse Ill. The cap is crimped I ing metal should be used. Hard copper has been found very satisfactory.
While a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claim, without departing from the spirit of the invention.
Having thus described the invention, what is claimed and desired secured by Letters Patent is:
An integral self-anchoring blasting cap for fuses consisting of: a tubular metallic member closed at one extremity and open at the other;
detonating material in the closed'end of said member; said member having a circumferential constriction spaced a substantial portion of the length of the member from the open end to bear upon a fuse; said member having a plurality of spaced apart slits extending from the open end to a location adjacent the said constriction providing a plurality of fangs flared outwardly whereby to maintain the cap and associated fuse 10 within a blasting charge.
THOMAS E. BARTON.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2535518 *||Sep 25, 1948||Dec 26, 1950||Bickford Res Lab Inc||Fuse igniting and connecting means|
|US2682221 *||Jul 3, 1950||Jun 29, 1954||Air Liquide||Priming device for liquid oxygen explosive cartridges|
|US2752849 *||Oct 25, 1951||Jul 3, 1956||Du Pont||Blasting device|
|US4495867 *||Jun 18, 1982||Jan 29, 1985||E. I. Du Pont De Nemours And Company||Assembly for initiating explosives with low-energy detonating cord|
|US5123356 *||Jun 27, 1991||Jun 23, 1992||Schlumberger Technology Corporation||Transfer apparatus adapted for transferring an explosive train through an externally pressurized secondary explosive bulkhead|
|U.S. Classification||102/275.9, 102/275.5, 102/275.12|
|International Classification||F42B3/26, F42B3/00|