US220735A - Improvement in blasting-squibs - Google Patents
Improvement in blasting-squibs Download PDFInfo
- Publication number
- US220735A US220735A US220735DA US220735A US 220735 A US220735 A US 220735A US 220735D A US220735D A US 220735DA US 220735 A US220735 A US 220735A
- Authority
- US
- United States
- Prior art keywords
- match
- squibs
- blasting
- squib
- improvement
- 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
- 239000000203 mixture Substances 0.000 description 16
- 239000005864 Sulphur Substances 0.000 description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000003245 coal Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920002472 Starch Polymers 0.000 description 4
- 235000013871 bee wax Nutrition 0.000 description 4
- 229940092738 beeswax Drugs 0.000 description 4
- 239000012166 beeswax Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000002028 premature Effects 0.000 description 4
- 235000019698 starch Nutrition 0.000 description 4
- 239000008107 starch Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 235000000346 sugar Nutrition 0.000 description 4
- 240000004658 Medicago sativa Species 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000010902 straw Substances 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
Description
T. s. THOMAS & J. R.'POWELL.
Blasting-Squib No. 220,735.
C%W%%W WITNESSES:
' INVENTORS.
Patented Oct. 21, I879.
ATTORNEY.
UNITED STATES-PATENT OFFICE.
THOMAS S. THOMAS AND J OHN R. POWELL, OF PLYMOUTH, PENNSYLVANIA.
IMPROVEMENT IN BLASTlNG-SQUIBS.
Specification forming partof Lettcrs PatcntNo. 220,735, dated October '21, 1819; applicatlon filed July 21, 1878.
To all whom it may (5 m.- 1
Be it known that we, T'noMAs- S. THOMAS and JOHN R. POWELL, c Plymouth, county of 'Luzerne, and State of Pennsylvania, have invented certain new and useful Improvements in Mining-Squibs for Blasting'Coal and Rock; and we do herebydeclare that the following is a'full, clear, and exact description of the invention, that will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawing, and to the letters and ti gures' of reference marked thereon, which form a part of this specification.
The sameletters and figures of reference are used to indicate the correspondingparts.-
After describing our invention, its nature and extcnt will be 'shown in the claims.
material which will burn only when brought into contact with a bright flame. Any substance that would burn, or even hold dead-- fire when brought in contact with a live coal, 1 would be unsuitable as a stopper for the upper. end of the squib.- A slow-match is attached tothe upper end oft-he squib. *This.
match consist-sot a small roll of twisted paper saturated with any suitablecomposition which will cause the match to burn with a slow bright flame until the the squib isreached. Any composition that would carry dead-fire or would burn with a coal would be an improper composition with which to saturate the match. V
The composition should not be brittle, like sulphur, as that substance is liable to break on, and thus allow the paper, when the sulphur is removed, to carry dead-fire. A brittle composition will allow: the match to become untwisted. so that the powder will run down'in sulphur in the end of the matcln'and thus discharge the blast .prematurely. A composition of bees-wax, brown sugar, and starch will answer these conditionsv of a good slow-match.
The match may be made so as to fit sqiiibs' Q of'any given size, and attached to the squib when needed; or'the match-may be loosely attached to the squib and then dipped in the inflammable composition, so that the attachnient will become firm.
1n the drawings, .0 is the match; D, the tube; B, the sulphur or the composition 'at the upper end, and A the soap at the lower end.
Squibs of straw or other water-proof material havebeen usedbefore; and alsoslow matches in connection with squibs have before been used; but/the upper ends of sqnilos have not before been closed, so as to prevent" the powder therein from running down. into the match when the match becomes partially untwisted. This causes the premature explosion of the blast-,and' is the cause of many accidents in mining.- i
The object of our invention is to provide a squib which will avoid the danger from deadfire, and also the danger from premature explosions, as herein described.
Having now fully described our invention, what we claim, and desire to secure by Letters Patent, is-
1. In a mining-squib, a water-proof tube closed at its upper end with sulphur or any similar material, in combination with the slow match, substantially as shown and described, and for the purposes herein set forth. 2. A slow-match saturated with a compositi'ou of bees-wax, starch, and sugar, or; any equivalent com position, substantially as shown and described, and for the purposes herein set forth.
Witness our hands this 23d day of July, A.
THOMAS S. THOMAS. JOHN R. POWELL. In presence of- H. QMAGEE,
J. W. Eno.
Publications (1)
Publication Number | Publication Date |
---|---|
US220735A true US220735A (en) | 1879-10-21 |
Family
ID=2290134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US220735D Expired - Lifetime US220735A (en) | Improvement in blasting-squibs |
Country Status (1)
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US (1) | US220735A (en) |
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0
- US US220735D patent/US220735A/en not_active Expired - Lifetime
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