US537287A - Coal-drill - Google Patents
Coal-drill Download PDFInfo
- Publication number
- US537287A US537287A US537287DA US537287A US 537287 A US537287 A US 537287A US 537287D A US537287D A US 537287DA US 537287 A US537287 A US 537287A
- Authority
- US
- United States
- Prior art keywords
- drill
- coal
- shank
- recess
- body portion
- 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
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000000034 method Methods 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
Definitions
- the object of my invention is to provide a simple, economical and efficient coal drill; and my invention consists in the features, combinations and details hereinafter described and claimed.
- Figure l is a front elevation of myimproved drill and detachable bit;
- Fig. 2,- a side elevation of a portion,partly in section, taken on line 2 of Fig. 1;' Fig. 3, a transverse section, takenon line 3 of Fig. 1;
- Fig. 4 a front elevation of the detachable bit;
- I make a body portion, A, of the twist drill type, formed by twisting a flat drill into the desired shape and pitch, and provide it with a shank, B, bifurcated for reasons hereinafter set forth.
- I provide a recess at the frontend of the body portion by offsetting the same, as at C, and combining with it a removable anged clip, D, provided with side flanges, 61,61, which form the desired recess between them.
- my improved drill a body portion of any desired length can be used in connection with the detachable bit, or several body portions can be secured together to make a long working drill. Again, several bits may be used in connection with one body portion, so thatduring the sharpening or forging processes it would not be necessary for the operator to remain idle.
- I claim-e In coal drills, the combination of a body portion having a shank at one end and an offset C at the front end tapering toward the shank, a removable cap O provided with tapered flanges d adapted to fit the tapered offset and form a recess between it and the offset, a bit portion provided withwa bifurcated shank detachably secured in such recess, and a bolt to rigidly hold such parts together, substantially as described.
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)
- Drilling Tools (AREA)
Description
(No Model.) K
M. HARDSOCG.
Patented Apr. 9, 1895.
GOAL DRILLl NITED STATES IPATENT OEEICE.
MARTIN IIARDSOOG, OF OTTUMWA, IOIVA.
COAL-DRILL.
SPECIFICATION forming part of Letters Patent No. 537,287, dated April 9, 1 895.
Application filed January 23, 1894. Serial No. 497,747 (No model.)
To ctll'whom t may concern:
Be it known that I, MARTIN HARDsocG, a
citizen of the United States, residing at Ot-y tumwa, Iowa, have invented certain new and useful Improvements in Coal-Drills, of which the following is a specification.
The object of my invention is to provide a simple, economical and efficient coal drill; and my invention consists in the features, combinations and details hereinafter described and claimed.
In the drawings, Figure l is a front elevation of myimproved drill and detachable bit; Fig. 2,- a side elevation of a portion,partly in section, taken on line 2 of Fig. 1;' Fig. 3, a transverse section, takenon line 3 of Fig. 1; Fig. 4, a front elevation of the detachable bit;
and Fig. 5 a side elevation ot'Fig. 4..
In constructing my improvement, I makea body portion, A, of the twist drill type, formed by twisting a flat drill into the desired shape and pitch, and provide it with a shank, B, bifurcated for reasons hereinafter set forth. I provide a recess at the frontend of the body portion by offsetting the same, as at C, and combining with it a removable anged clip, D, provided with side flanges, 61,61, which form the desired recess between them. De-
` tachably secured in this recess is a bit, E,
having a bifurcated shank portion e, which enters the recess and is securely clamped therein by means of the bolt, G, which is screw-threaded in the clip and passes through ythe slot of the bifurcated shank, in such man- The odset C of the drill is tapered toward the shank and the flanges d of the cap D correspondingly tapered to engage the odset. This construction prevents the parts f rom being disengaged during the withdrawal of the drill from a hole.
The advantages consequent to the use of my improved drill are that a body portion of any desired length can be used in connection with the detachable bit, or several body portions can be secured together to make a long working drill. Again, several bits may be used in connection with one body portion, so thatduring the sharpening or forging processes it would not be necessary for the operator to remain idle.
I am aware that the idea of removable bits and extension drills is not new, and do not desire to be understood as claiming this idea broadly. Nor do I wis'h to be unduly limited, any more than is pointed out in the claim, as I contemplate slight variations in form, con# struction and arrangement, as circumstances may suggest or render expedient, without de= parting from the spirit of the invention;
I claim-e In coal drills, the combination of a body portion having a shank at one end and an offset C at the front end tapering toward the shank, a removable cap O provided with tapered flanges d adapted to fit the tapered offset and form a recess between it and the offset, a bit portion provided withwa bifurcated shank detachably secured in such recess, and a bolt to rigidly hold such parts together, substantially as described.
THOMAS A. BANNIG, THOMAS F. SHERIDAN.
Publications (1)
Publication Number | Publication Date |
---|---|
US537287A true US537287A (en) | 1895-04-09 |
Family
ID=2606048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US537287D Expired - Lifetime US537287A (en) | Coal-drill |
Country Status (1)
Country | Link |
---|---|
US (1) | US537287A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2877574A (en) * | 1956-11-05 | 1959-03-17 | Gerald A Petersen | Reversible digging tooth |
US2952085A (en) * | 1957-09-09 | 1960-09-13 | Gerald A M Petersen | Reversible tooth for earth digging equipment |
US3375890A (en) * | 1965-12-20 | 1968-04-02 | Petersen Anita E | Earth auger construction |
-
0
- US US537287D patent/US537287A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2877574A (en) * | 1956-11-05 | 1959-03-17 | Gerald A Petersen | Reversible digging tooth |
US2952085A (en) * | 1957-09-09 | 1960-09-13 | Gerald A M Petersen | Reversible tooth for earth digging equipment |
US3375890A (en) * | 1965-12-20 | 1968-04-02 | Petersen Anita E | Earth auger construction |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US329660A (en) | Henry x | |
US537287A (en) | Coal-drill | |
US755355A (en) | Hammer or sledge. | |
US724542A (en) | Hammer. | |
US856719A (en) | Shearing-knife. | |
US706184A (en) | Tool. | |
US294663A (en) | Screw-driver | |
US882128A (en) | Auger. | |
US361522A (en) | Auger-bit | |
US1135530A (en) | Coal and rock drill. | |
US513541A (en) | Cutting-bit for drilling-machines | |
US266057A (en) | Miner s pick | |
US1132636A (en) | Rock-drill chuck. | |
US252206A (en) | Mining implement | |
US832096A (en) | Coal-drill attachment. | |
US911038A (en) | Combined mining and track tool. | |
US249966A (en) | Fbancis i | |
US868291A (en) | Mining-machine chain. | |
US566527A (en) | Drill | |
US603101A (en) | Rock-drill chuck | |
US624883A (en) | Mining-hammer | |
US535924A (en) | Coal-drilling machine | |
US362137A (en) | Rod or bolt cutter | |
US781761A (en) | Drill-chuck. | |
US185114A (en) | Improvement in mill-picks |