US168225A - Improvement in protectors for explosive caps - Google Patents
Improvement in protectors for explosive caps Download PDFInfo
- Publication number
- US168225A US168225A US168225DA US168225A US 168225 A US168225 A US 168225A US 168225D A US168225D A US 168225DA US 168225 A US168225 A US 168225A
- Authority
- US
- United States
- Prior art keywords
- caps
- explosive
- improvement
- protectors
- cap
- 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
- 239000002360 explosive Substances 0.000 title description 18
- 230000001012 protector Effects 0.000 title 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 206010010254 Concussion Diseases 0.000 description 4
- MHWLNQBTOIYJJP-UHFFFAOYSA-N Mercury(II) fulminate Chemical compound [O-][N+]#C[Hg]C#[N+][O-] MHWLNQBTOIYJJP-UHFFFAOYSA-N 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 210000003414 Extremities Anatomy 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/045—Arrangements for electric ignition
- F42D1/05—Electric circuits for blasting
- F42D1/055—Electric circuits for blasting specially adapted for firing multiple charges with a time delay
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/04—Protective caps
Definitions
- This invention relates to an improvementin the protection of explosive caps.
- My invention is designed to remedy both of these difficulties: first, to. render these caps perfectly safe from any danger arising from sudden jar, fall, or concussion; and, in the second place, to render them thoroughly water proof.
- the nature of my invention is clearly shown in the drawings.
- Figure 1 is an external view of the fuse and cap.
- Fig. 2' is a longitudinal cross-section, showing the internal arrangement.
- c is a portion of the ordinary tarred fuse used in exploding these caps and powder generally.
- a is the explosive cap, with its charge b, of fulminate of mercury or other explosive.
- d is the protecting cover or tube, in which the essence of my invention consists.
- a tube of rubber or other suitable elastic material is slipped over the explosive cap. This tube projects at both ends of the cap, but more at its open than at its closed end.
- the fuse c Into the open end of the cap a and its surrounding tube is slipped the fuse c, which is thus brought into contact with the explosive 11 contained in the cap a.
- the rubber tube (1 is made of such a size as to compress and hold tightly the entering .fuse c, and when this fuse has been placed in position the cap a is perfectly water-proof, and may be kept under water for several days without danger of becoming inoperative.
- miners are unable to withdraw these exploders, and consequently the entire charge is useless, and another hole has to be drilled.
- An exploder for miners arranged with an elastic inclosing covering, d, for the purpose of embracing and holding firmly the entering fuse, substantially as described.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Emergency Lowering Means (AREA)
Description
F. A. CANFIELD.
Protector for Explosive Caps.
No 168,225, PatentedSept.28,1875.
Wkmssms. Km who m i jgaw ".PETERS. PHOTO-LITNOGRAPNER, WASHINGTON, D. C
UNITED STATES PATENT OEEIcE.
FREDERICK A. GANFIELD, OF DOVER, NEW JERSEY.
IMPROVEMENT IN PROTECTORS FOR EXPLOSIVE CAPS.-
Specification forming part of Letters Patent No. 168,225, dated September 28, 1875; application filed July 2, 1875.
To all whom it may concern:
Be it known that I. FREDERICK A. UAN- FIELD, of Dover, Morris county, State of New Jersey, have invented certain new and useful Improvement in the Protection of Explosive Gaps; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon.
This invention relates to an improvementin the protection of explosive caps.
In order to explode nitro-glycerine-a substance in its various compounds at present much used in blasting-an initial explosion of considerable violence is necessary, and explosive caps of various sorts are used. These caps are primed with fulminate of mercury and other unstable and dangerous substances, which are liable to explode from sudden jar or friction.
These explosive caps are liable to two difficulties: In the first place, miners or workmen carrying them carelessly will sometimes drop them or place them in situations where they are exposed to a sudden blow, and the resulting explosions are very dangerous, occasioning sometimes loss of life and limb. In the second place, these caps, being constantly exposed to water and moisture, are liable to become wet, and thus inoperative and useless.
My invention is designed to remedy both of these difficulties: first, to. render these caps perfectly safe from any danger arising from sudden jar, fall, or concussion; and, in the second place, to render them thoroughly water proof. The nature of my invention is clearly shown in the drawings.
Figure 1 is an external view of the fuse and cap. Fig. 2' is a longitudinal cross-section, showing the internal arrangement.
The same letters in both drawings represent similar parts. i
c is a portion of the ordinary tarred fuse used in exploding these caps and powder generally. a is the explosive cap, with its charge b, of fulminate of mercury or other explosive. d is the protecting cover or tube, in which the essence of my invention consists. A tube of rubber or other suitable elastic material is slipped over the explosive cap. This tube projects at both ends of the cap, but more at its open than at its closed end. By means of this elastic cover or tube the cap is thoroughly protected on all sides from any explosion arising from jar'or concussion, and caps thus protected can be safely tamped with black powder. The closed end of the cap 61 might be still further protected by a soft filling of rubber or other suitable material. Into the open end of the cap a and its surrounding tube is slipped the fuse c, which is thus brought into contact with the explosive 11 contained in the cap a. The rubber tube (1 is made of such a size as to compress and hold tightly the entering .fuse c, and when this fuse has been placed in position the cap a is perfectly water-proof, and may be kept under water for several days without danger of becoming inoperative.
There is another advantage connected with these exploders, namely, this: that if it ever becomes necessary to withdraw a charge, a pull upon the projectingfuse will withdraw the exploder, owing to the close contact and friction between the rubber tube and the entering tarred fuse, while, as ordinarily arranged,
miners are unable to withdraw these exploders, and consequently the entire charge is useless, and another hole has to be drilled.
What I claim as my invention, and desire to secure by Letters Patent, is-
An exploder for miners, arranged with an elastic inclosing covering, d, for the purpose of embracing and holding firmly the entering fuse, substantially as described.
FREDK. A. OANFIELD.
Witnesses:
E. N. DIoKENsoN, Jr., JNO. R. LEFFERTS.
Publications (1)
Publication Number | Publication Date |
---|---|
US168225A true US168225A (en) | 1875-09-28 |
Family
ID=2237634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US168225D Expired - Lifetime US168225A (en) | Improvement in protectors for explosive caps |
Country Status (1)
Country | Link |
---|---|
US (1) | US168225A (en) |
-
0
- US US168225D patent/US168225A/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US168225A (en) | Improvement in protectors for explosive caps | |
US4037536A (en) | Enclosure for explosive material | |
NO841994L (en) | DETONATOR SKIN PIECE | |
US1025065A (en) | Blasting fuse and cap. | |
US1091878A (en) | Waterproof blast-cap-charge protector. | |
US868876A (en) | Priming of explosives. | |
US1331623A (en) | Detonator for high-explosive shells | |
US1358478A (en) | Blasting-cap | |
US20160102957A1 (en) | Chemical Detonator with Electric Trigger | |
US748935A (en) | Blasts n g-cartridge | |
US650803A (en) | Tamping-plug. | |
US273270A (en) | Primer for blasting-cartridges | |
US476852A (en) | Gas-cap | |
US1239247A (en) | Subaqueous-blasting system. | |
US878369A (en) | Cartridge. | |
US1306510A (en) | Detonator | |
US622994A (en) | Shell for high explosives | |
US138467A (en) | Improvement in fire-alarms | |
US148338A (en) | Improvement in electric fuses | |
US164921A (en) | N electric fuses | |
US734684A (en) | Safety blasting-cartridge. | |
US956996A (en) | Fuse. | |
US542041A (en) | Field | |
US701173A (en) | Safety device for blasting purposes. | |
US2471381A (en) | Safety device for blasting caps |