US197075A - Improvement in expansion rock-drills - Google Patents
Improvement in expansion rock-drills Download PDFInfo
- Publication number
- US197075A US197075A US197075DA US197075A US 197075 A US197075 A US 197075A US 197075D A US197075D A US 197075DA US 197075 A US197075 A US 197075A
- Authority
- US
- United States
- Prior art keywords
- drill
- stock
- blades
- drills
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 101150039167 Bex3 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/325—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being shifted by a spring mechanism
Definitions
- llz'l'y invention relates to an improved rocklrill, designed to be used after the ordinary lrill, for the purpose of enL rging the hole at he bottom to form a larger chamber for conainin g the blasting material.
- the improvement consists in cutting-blades rranged in guides in the drill-stock, in coniection with a spring-seated end piece, so as o be projected laterally from the stock of he drill by the impact upon the end piece, nd be again withdrawn into the drill-stock y the action of the spring when the drill is lrawn back, as hereinafter fully described.
- A represents the drilltock of my improved rock-drill, which stock 5 made of iron, and may be either made of he same length as the ordinary drill, or be nade shorter, and provided with a screwhreaded connection, to adapt it to be screwed nto the end of the ordinary drill.
- the outer end of the drill-stock is divided entrally, and the portion B made removable nd attached by screws, as shown.
- the cener of the drill, at this end, is also bored out, 1nd in the groove or cavity is arranged a spial. spring, (J, and the stem 1), which latter is i gidly attached to the end piece E at a point eyond the end of the drill-stock.
- This end iece is composed of two semi-cylindrical parts, vhich are riveted to each other, and fastened o the stem D by a single screw, a.
- the cutting-blades are made of he best steel, with sharp edges, parallel with he axis of the drill-stock.
- These blades at pposite ends, are inclined or beveled in opposite directions, giving to the same a dove tail shape, and are arranged with their inner ends between the drill-stock and the removable portion B, and with their outer ends between the two parts of the end piece E.
- Both the drill-stock and end piece are cut away upon their inner faces, with inclined edges 1) b b 1), corresponding to the beveled ends of the blades, and have, also, grooves 000 0, arranged parallel with said inclined edges.
- the blades have their back edges seated in lon tudinal recesses in the stem 1), and are provided with pins (Z d d d, which extend into the grooves c 0.
- the stem 1) to compress the spiral spring, and the grooves and edges 1) and c of the end piece, in approaching the grooves and edges 1) and c of the drill-stock, cause the beveled blades to be projected outwardly from the center with great force to produce a lateral cut and enlarge the chamber for the blasting material, the spiral spring serving to force the end piece E outwardly again and restore the blades to their position near the stem, so as to permit the drill to be drawn back without obstruction, either for removal or a second blow.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
J. A. ALBRIGHT. Expansion Rook-Drills.
Patented Nov. 13, 1877.
AITORNEYS.
wAsmNcIoM. u I:
UNITED STATES Parana @rrren JAMES A. ALBRIGHT, OF FAYETTEVILLE, TENNESSEE, ASSIGNOB OF ONE-HALF HIS RIGHT TO JAS. H. HOLMAN, OF SAME PLACE.
IMPROVEMENT IN EXPANSION ROCK-DRILLS.
Specification forming part of Letters Patent No. 197,075, dated November 13, 1877; application filed September 6, 1877.
lb all whom it may concern:
Be it known that I, JAM-Es A. ALBRIGHT, f Fayetteville, in the county of Lincoln and itate of Tennessee, have invented a new and mproved Rock-Drill; and I do hereby dealare that the following is a full, clear, and =xact description of the same, reference being ad to the accompanying drawing, forming )art of this specification, in which- Figured is a side view of the drill, looking hi the edge of the blades; Fig. 2, a side view f the drill, looking at the side of the blades, md with the blades projected outwardly; Fig. a view, partly in section, with the portion 3 removed.
llz'l'y invention relates to an improved rocklrill, designed to be used after the ordinary lrill, for the purpose of enL rging the hole at he bottom to form a larger chamber for conainin g the blasting material.
The improvement consists in cutting-blades rranged in guides in the drill-stock, in coniection with a spring-seated end piece, so as o be projected laterally from the stock of he drill by the impact upon the end piece, nd be again withdrawn into the drill-stock y the action of the spring when the drill is lrawn back, as hereinafter fully described.
In the drawings, A represents the drilltock of my improved rock-drill, which stock 5 made of iron, and may be either made of he same length as the ordinary drill, or be nade shorter, and provided with a screwhreaded connection, to adapt it to be screwed nto the end of the ordinary drill.
The outer end of the drill-stock is divided entrally, and the portion B made removable nd attached by screws, as shown. The cener of the drill, at this end, is also bored out, 1nd in the groove or cavity is arranged a spial. spring, (J, and the stem 1), which latter is i gidly attached to the end piece E at a point eyond the end of the drill-stock. This end iece is composed of two semi-cylindrical parts, vhich are riveted to each other, and fastened o the stem D by a single screw, a.
F are the cutting-blades, which are made of he best steel, with sharp edges, parallel with he axis of the drill-stock. These blades, at pposite ends, are inclined or beveled in opposite directions, giving to the same a dove tail shape, and are arranged with their inner ends between the drill-stock and the removable portion B, and with their outer ends between the two parts of the end piece E. Both the drill-stock and end piece are cut away upon their inner faces, with inclined edges 1) b b 1), corresponding to the beveled ends of the blades, and have, also, grooves 000 0, arranged parallel with said inclined edges. The blades have their back edges seated in lon tudinal recesses in the stem 1), and are provided with pins (Z d d d, which extend into the grooves c 0.
Now, in operating the drill, as the end piece E strikes the bottom of the previously-drilled hole, the impact forces the same toward the drill-stock. This movement, it will be seen,
causes the stem 1) to compress the spiral spring, and the grooves and edges 1) and c of the end piece, in approaching the grooves and edges 1) and c of the drill-stock, cause the beveled blades to be projected outwardly from the center with great force to produce a lateral cut and enlarge the chamber for the blasting material, the spiral spring serving to force the end piece E outwardly again and restore the blades to their position near the stem, so as to permit the drill to be drawn back without obstruction, either for removal or a second blow.
Having thus described my invention, what I claim as new is l. The combination, with a drill-stock and a spring-seated end piece, E, having stem l), of the beveled cutting-blades, arranged in guides to be projected laterally by the impact of the end piece, substantially as described, and for the purpose set forth.
2. The combination of the centrally-bored drill-stock A, having removable part 13, the spring 0, the centrally-divided end piece E, with rigid stem 1), and the beveled cuttingblades F, having pins (1 d, substantially as described, and for the purpose set forth.
JAMES A. ALBRIGHT.
Witnesses:
\V. A. GILL, Jr., G-no. J. STONEBRAKE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US197075A true US197075A (en) | 1877-11-13 |
Family
ID=2266481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US197075D Expired - Lifetime US197075A (en) | Improvement in expansion rock-drills |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US197075A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120148357A1 (en) * | 2010-12-13 | 2012-06-14 | Josef Hasler | Undercutting tool |
-
0
- US US197075D patent/US197075A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120148357A1 (en) * | 2010-12-13 | 2012-06-14 | Josef Hasler | Undercutting tool |
| US8863863B2 (en) * | 2010-12-13 | 2014-10-21 | Josef Hasler | Undercutting tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US54144A (en) | Improved mode of boring artesian wells | |
| US750537A (en) | Drilling-tool | |
| US385088A (en) | Drilling-tool | |
| US808245A (en) | Wood-boring implement. | |
| US197075A (en) | Improvement in expansion rock-drills | |
| US1169369A (en) | Drill. | |
| US1271396A (en) | Coal-mine drill. | |
| US1762504A (en) | Roller bit | |
| US1066707A (en) | Expansion-bit. | |
| US175672A (en) | Improvement in chisels for cutting holes in masonry | |
| CN1663732B (en) | Mortiser tool | |
| US483210A (en) | Coal-auger | |
| US221692A (en) | Improvement in hollow augers | |
| US134805A (en) | Improvement in bits for boring coal | |
| US335469A (en) | Eugene moeeau | |
| US1145822A (en) | Core-drill. | |
| US892180A (en) | Drill-bit. | |
| US1022129A (en) | Adjustable drilling-bit. | |
| US294714A (en) | Expanding reamer | |
| US1078701A (en) | Apparatus for drilling holes. | |
| US1881535A (en) | Drill | |
| US419622A (en) | Die for forming auger-bits | |
| US218374A (en) | Improvement in mining-drills | |
| US202864A (en) | Improvement in earth-augers | |
| US700430A (en) | Combination bit and reamer. |