US379147A - Friction-primer for blasting - Google Patents
Friction-primer for blasting Download PDFInfo
- Publication number
- US379147A US379147A US379147DA US379147A US 379147 A US379147 A US 379147A US 379147D A US379147D A US 379147DA US 379147 A US379147 A US 379147A
- Authority
- US
- United States
- Prior art keywords
- staff
- wire
- primer
- friction
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005422 blasting Methods 0.000 title description 4
- 239000002360 explosive Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 210000003414 Extremities Anatomy 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 241000508725 Elymus repens Species 0.000 description 2
- 230000036461 convulsion Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- USXDFAGDIOXNML-UHFFFAOYSA-N fulminate Chemical compound [O-][N+]#[C-] USXDFAGDIOXNML-UHFFFAOYSA-N 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
- 239000002965 rope Substances 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
- F42C15/29—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids operated by fluidic oscillators; operated by dynamic fluid pressure, e.g. ram-air operated
Definitions
- My invention relates to devices for exploding blasts, and the purpose is to provide an extremely simple and perfectly safe frictional primer for this purpose which may be used in any kind of blast, which is free from liability of premature explosion or accidental ignition, may be kept for an indefinite period without deterioration, and produced ready for use at a comparatively low cost. 7
- Figure l is a sectional view of a blast-opening with the charge tamped in and the exploder in place ready for firing.
- Fig. 2 is a longitudinal section and transverse section of the tube of the exploder, showing the manner of constructing the same, the transverse section being shown below the longitudinal view.
- Fig. 3 is a vertical section, enlarged, of the lower portion of the exploder shown in Fig. 1.
- the reference-numeral 1 designates the exploder-tube, which may be constructed of wood, paper, or any other suitable material.
- the tube may be either square or round, a groove, 2, being cut in one side and partly filled subsequently by a strip, 3, inserted in said groove and glued or otherwise fastened.
- the exploder-tube 1 may be of any suitable length; but I prefer to manufacture it about four feet long, one or more additional sections being jointed thereto, if required, when .it is used.
- an explosive material 5
- a wire, 6, is coiled within the mass 5 of the explosive material or fulminate, which is of any suitable kind capale of ignition by friction-such, for example, as that employed in the manufacture of parlor-matches.
- the blast-primer 7 may be attached, resting against the friction-primer above it.
- the chambered end of the staff is inserted just within the end of the shell 8, which is then closed down upon the staff and the surfaces are waterproofed.
- the wire 6 is carried up through the slot in the staff, thence out through an opening, 9,just below the end,and looped around the extremity, the loop of the wire lyingin a notch, 10, in the end of the staff. In this way the wire can be operated and the charge fired only by breaking the staff at the point where the wire is looped.
- the free end of the wire is then attached to a cord or rope, to which a series of such wires may be fastened and all exploded simultaneously.
- the coiled end of the wire lying in the paste may be roughened, if desired, though it is not absolutely essential.
- wire need not be coiledin the paste, though in practice this is preferable. A piece of wire simply embedded therein will give similar results.
- the waterproofing is only necessary when the primer is used in damp ground. I may, however, waterproof the complete primer, so that it will not deteriorate in different climates or atmospheric conditions.
- An exploding device consisting of a staff having a chamber containing an igniting-paste in which a strip of wire is embedded, said wire being extended from the chamber and looped or knotted in a notch or channel formed around the staff, substantially as described.
- An exploder consisting of a staff having a chamber at one end filled with frictionpastc and a wire embedded within said paste and carried through a channel in the staff to a point near the other extremity, where it is looped or knotted in a' notch or channel formed in the staff, substantiahy as described.
- An exploder consisting of a rod or staff having a chamber in one end to contain friction-paste,and provided with a channel or bore leading from said chamber to the other end of said staff, and a primer having a shell within the end of which the chambered end of the shaft is inserted, thejoint being rendered Water-proof, the other endof the staff being weakened by a cut or notch in which the wire or cord is knotted, substantially as described.
- An exploder consisting of a staff having a chamber at one end and a channel leading from said chamber to a notch in the other end of said staff, the chamber being filled With friction-paste, and a wire being embedded therein and carried through the channel to the notch, Where it is looped or tied around the staff, substantially as described.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Description
Patented Mar. 6,1888" jx/wza N PETERS. Pnowmmm ner. wmin n n'jg;
(No Model.)
- A; F. ANDREWS.
FRICTION PRIMER FOR BLASTING.
. NITED STATES PATENT OFFICE.
ALBERT F. ANDREWS, OF AVON, CONNECTICUT.
FRICTION-PRIMER FOR BLASTING.
SPECIFICATION forming part of Letters Patent No. 379,147, dated March 6, 1888.
(No model.)
.To all whom it may concern:
Be it known that l, ALBERT F. ANDREWS, a citizen of the United States, residing at Avon, in the county of Hartford and State of Connecticut, have invented new and useful Improvements in Devices for Exploding Blasts, of which the following is a specification.
My invention relates to devices for exploding blasts, and the purpose is to provide an extremely simple and perfectly safe frictional primer for this purpose which may be used in any kind of blast, which is free from liability of premature explosion or accidental ignition, may be kept for an indefinite period without deterioration, and produced ready for use at a comparatively low cost. 7
The invention consists in the several novel features of construction and new combinations of parts hereinafter fully set forth, and definitely pointed out in the claims.
In theaccompanying drawings, Figure l is a sectional view of a blast-opening with the charge tamped in and the exploder in place ready for firing. Fig. 2 is a longitudinal section and transverse section of the tube of the exploder, showing the manner of constructing the same, the transverse section being shown below the longitudinal view. Fig. 3 is a vertical section, enlarged, of the lower portion of the exploder shown in Fig. 1.
In the said drawings, the reference-numeral 1 designates the exploder-tube, which may be constructed of wood, paper, or any other suitable material. For economy, however, I prefer to form the tube of wood, in which case it may be either square or round, a groove, 2, being cut in one side and partly filled subsequently by a strip, 3, inserted in said groove and glued or otherwise fastened.
The exploder-tube 1 may be of any suitable length; but I prefer to manufacture it about four feet long, one or more additional sections being jointed thereto, if required, when .it is used.
At the lower end is formed an enlarged chamber, 4, containing an explosive material, 5. In the construction shown in Figs. 2 and 3 I form this chamber by simply enlarging the diameter of the longitudinal passage 2. In this enlarged chamber 4 a wire, 6, is coiled within the mass 5 of the explosive material or fulminate, which is of any suitable kind capale of ignition by friction-such, for example, as that employed in the manufacture of parlor-matches.
Below the chambered end of the staff of the exploder the blast-primer 7 may be attached, resting against the friction-primer above it. When the blasting-primer is used in operating with high explosives, the chambered end of the staff is inserted just within the end of the shell 8, which is then closed down upon the staff and the surfaces are waterproofed. The wire 6 is carried up through the slot in the staff, thence out through an opening, 9,just below the end,and looped around the extremity, the loop of the wire lyingin a notch, 10, in the end of the staff. In this way the wire can be operated and the charge fired only by breaking the staff at the point where the wire is looped. The free end of the wire is then attached to a cord or rope, to which a series of such wires may be fastened and all exploded simultaneously.
The coiled end of the wire lying in the paste may be roughened, if desired, though it is not absolutely essential.
It will be understood that the exploder cannot be fired except by breaking the staff at the point where the wire is looped around it, which is done by a twitch upon the wire.
It will be understood that the wire need not be coiledin the paste, though in practice this is preferable. A piece of wire simply embedded therein will give similar results.
The waterproofing is only necessary when the primer is used in damp ground. I may, however, waterproof the complete primer, so that it will not deteriorate in different climates or atmospheric conditions.
What I claim is 1. An exploding device consisting of a staff having a chamber containing an igniting-paste in which a strip of wire is embedded, said wire being extended from the chamber and looped or knotted in a notch or channel formed around the staff, substantially as described.
2. An exploder consisting of a staff having a chamber at one end filled with frictionpastc and a wire embedded within said paste and carried through a channel in the staff to a point near the other extremity, where it is looped or knotted in a' notch or channel formed in the staff, substantiahy as described.
3. An exploder consisting of a rod or staff having a chamber in one end to contain friction-paste,and provided with a channel or bore leading from said chamber to the other end of said staff, and a primer having a shell within the end of which the chambered end of the shaft is inserted, thejoint being rendered Water-proof, the other endof the staff being weakened by a cut or notch in which the wire or cord is knotted, substantially as described.
4. An exploder consisting of a staff having a chamber at one end and a channel leading from said chamber to a notch in the other end of said staff, the chamber being filled With friction-paste, and a wire being embedded therein and carried through the channel to the notch, Where it is looped or tied around the staff, substantially as described.
In testimony whereof I a'ffix my signature in presence of two witnesses.
ALBERT F. ANDREWS. VVi t n esses:
L. F. WEBs'rEn, GEO. A. SAUNDERS.
Publications (1)
Publication Number | Publication Date |
---|---|
US379147A true US379147A (en) | 1888-03-06 |
Family
ID=2448144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US379147D Expired - Lifetime US379147A (en) | Friction-primer for blasting |
Country Status (1)
Country | Link |
---|---|
US (1) | US379147A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2455336A (en) * | 1943-02-15 | 1948-11-30 | Ici Ltd | Delay action initiator for explosive charges |
US3416450A (en) * | 1965-10-28 | 1968-12-17 | Dynamit Nobel Ag | Friction ignitor |
US4380957A (en) * | 1980-09-23 | 1983-04-26 | Makainai Jr Jesse K | Flare with improved starter cap |
US5313888A (en) * | 1992-05-05 | 1994-05-24 | Martin Brian D | Pull-wire igniter for flares |
-
0
- US US379147D patent/US379147A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2455336A (en) * | 1943-02-15 | 1948-11-30 | Ici Ltd | Delay action initiator for explosive charges |
US3416450A (en) * | 1965-10-28 | 1968-12-17 | Dynamit Nobel Ag | Friction ignitor |
US4380957A (en) * | 1980-09-23 | 1983-04-26 | Makainai Jr Jesse K | Flare with improved starter cap |
US5313888A (en) * | 1992-05-05 | 1994-05-24 | Martin Brian D | Pull-wire igniter for flares |
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