US155731A - Improvement in methods of tamping - Google Patents
Improvement in methods of tamping Download PDFInfo
- Publication number
- US155731A US155731A US155731DA US155731A US 155731 A US155731 A US 155731A US 155731D A US155731D A US 155731DA US 155731 A US155731 A US 155731A
- Authority
- US
- United States
- Prior art keywords
- tamping
- methods
- improvement
- glycerine
- charged
- 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
- SNIOPGDIGTZGOP-UHFFFAOYSA-N 1,2,3-propanetrioltrinitrate Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 description 6
- 239000002360 explosive Substances 0.000 description 6
- 229960003711 glyceryl trinitrate Drugs 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 229920002877 acrylic styrene acrylonitrile Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Description
c. L. KALM BA 'GH. Methods of Tamping. No 155,73l. Patented 0ct .6,18z 4-..
UNITED STATES PATENT OFFICE.
. CHAR-LES L. KALMBAcHjoF n-IcnMoND, VIRGINIA.
IMPROVEMENT IN METHODS OF TAMPING.
Specification forming part of Letters Patent No. 155,731, dated October "6, 1874; application filed June 24, 1874.
To all whom it may concern:
Be it known that I, CHARLES L. KALMBACH, M. E., of Richmond, in the county of Henrico and State of Virginia, have invented a new and useful Mode of Tamping or Stemming Mines Charged with Nitro-Glycerine or kindred explosives; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawing, in which I have shown a mine charged, according to my invention, in vertical section.
The value of tamping a mine before exploding it is'well recognized among all engineers; it economizes explosive material and drilling, increases the efficiency of the blast,
serted at A, andlthen the primer B is lowered 'till it rests well on top of the charge; then a two wads, as shown at 1). Then some ordinary tamping is introduced, which is not very -firmly packed, "as shown at F, leaving a foot or two of the top of the hole for hard ramming, which may safely be driven with bar.
and sledge, the air-cushion preventing all' blowsjrom affecting the charge below. The
IMWA,
and tends to reduce the violent projection of fuse or wires H is or are extended out of the the fragments. Heretofore. such tamping of hole in the, usual manner. v mines charged with nitro-glycerine has been What I claim as my invention, and desire too dangerous to be properly performed, or" to secure by Letters Patent, iseven attempted. The mode of tamping mines charged with My invention consists in providing an airnitro-glycerine, or its compounds, by intercushion between the nitro-glycerine, or simposing an air-cushion in conjunction with ilar explosive, and the tamping material, so as loose and firm"'tamping, substantially as set to avoid the danger of percussive compression forth. v of the charge, while tamping the same, thus In testimony whereof I have signed my ridding that operation of the only and priname to'this specification in the presence of mary cause of premature explosion. two subscribing witnesses.
In the annexed drawing 1 have shown a y CHARLES LFKALMBACH, mine tamped in this manner. Witnesses:
The-hole having been bored to the requisite ASA ROGERS, depth, the charge to be exploded is first in- J. H. HENRY.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US155731A true US155731A (en) | 1874-10-06 |
Family
ID=2225141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US155731D Expired - Lifetime US155731A (en) | Improvement in methods of tamping |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US155731A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4754705A (en) * | 1986-11-17 | 1988-07-05 | The Curators Of The University Of Missouri | Mechanical stemming construction for blast holes and method of use |
| US5247886A (en) * | 1992-10-14 | 1993-09-28 | The Curators Of The University Of Missouri | Blast plug and stemming construction for blast holes |
| US5253586A (en) * | 1992-10-15 | 1993-10-19 | The Curators Of The University Of Missouri | Method of stemming a blast hole |
-
0
- US US155731D patent/US155731A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4754705A (en) * | 1986-11-17 | 1988-07-05 | The Curators Of The University Of Missouri | Mechanical stemming construction for blast holes and method of use |
| US5247886A (en) * | 1992-10-14 | 1993-09-28 | The Curators Of The University Of Missouri | Blast plug and stemming construction for blast holes |
| US5253586A (en) * | 1992-10-15 | 1993-10-19 | The Curators Of The University Of Missouri | Method of stemming a blast hole |
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