GB257772A - Improvements in or relating to drilling braces and bits - Google Patents
Improvements in or relating to drilling braces and bitsInfo
- Publication number
- GB257772A GB257772A GB2695925A GB2695925A GB257772A GB 257772 A GB257772 A GB 257772A GB 2695925 A GB2695925 A GB 2695925A GB 2695925 A GB2695925 A GB 2695925A GB 257772 A GB257772 A GB 257772A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bit
- brace
- drilling
- edges
- drills
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/06—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by man-power
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
257,772. Jenkins, A. H. June 18, 1926. Hand and breas drills; drills. - A bit for a drilling brace consists of a flat piece of metal having a V-shaped end a<1> and a series of cutting-edges a<2> of progressively increasing diameter. The cutting edges are inclined to the axis of the bit, both in its own plane and at right angles thereto, the edges opposite each other being oppositely inclined. The bit is attached to a brace b, formed from a piece of stout wire and having the usual handles b<1>, b<2> bv means of a rivet b<4> and interengaging slots in the bit and brace. In use a hole is drilled by the cutting edges a<1> and is enlarged to the required size by the edes a<2>.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2695925A GB257772A (en) | 1926-06-18 | 1926-06-18 | Improvements in or relating to drilling braces and bits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2695925A GB257772A (en) | 1926-06-18 | 1926-06-18 | Improvements in or relating to drilling braces and bits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB257772A true GB257772A (en) | 1926-09-09 |
Family
ID=10251878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2695925A Expired GB257772A (en) | 1926-06-18 | 1926-06-18 | Improvements in or relating to drilling braces and bits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB257772A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2655964A (en) * | 1951-02-16 | 1953-10-20 | Jr Joseph A Labbee | Screw taper drill attachment |
| GB2195564A (en) * | 1986-10-11 | 1988-04-13 | George Waddell | Piloted drill tip |
-
1926
- 1926-06-18 GB GB2695925A patent/GB257772A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2655964A (en) * | 1951-02-16 | 1953-10-20 | Jr Joseph A Labbee | Screw taper drill attachment |
| GB2195564A (en) * | 1986-10-11 | 1988-04-13 | George Waddell | Piloted drill tip |
| GB2195564B (en) * | 1986-10-11 | 1991-03-27 | George Waddell | Piloted drill bit. |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1747117A (en) | Method of making multiple diameter cut tools | |
| GB257772A (en) | Improvements in or relating to drilling braces and bits | |
| US2264922A (en) | Drilling tool | |
| GB593622A (en) | Improvements in or relating to drill bits, cutting tools and the like | |
| GB558868A (en) | Rock drills | |
| GB519475A (en) | Improvements in and relating to drilling tools | |
| GB203039A (en) | Improvements in percussive rock drilling tools with renewable cutters | |
| DE600676C (en) | Coal and rock drill bits with two cutting edges at an unequal distance from the drill axis | |
| GB423647A (en) | Improvements in stone boring tools, rock drills, and the like | |
| FR777596A (en) | Improvements made to bits, drills, reamers, taps and similar tools | |
| GB410947A (en) | Improvements in rock drills | |
| GB212618A (en) | Improvements in and relating to twist drills, reamers and the like tools | |
| GB172820A (en) | Improvements in flat drills | |
| GB345922A (en) | Improvements in or relating to centre bits | |
| GB333489A (en) | Improvements in or relating to a cutting tool for rock drills of the percussion type | |
| GB351337A (en) | Double winged boring bit | |
| GB533343A (en) | Improvements in and relating to rock drills | |
| GB308542A (en) | Improvements relating to percussive rock-drilling tools | |
| GB681204A (en) | Improvements in and relating to drilling tools | |
| GB512830A (en) | Improvements in percussion drills | |
| GB207440A (en) | Auxiliary cutting tool for twist drills & the like | |
| GB427654A (en) | Improvements in and relating to rotary drills | |
| GB191314637A (en) | Improvements in Rock Drills. | |
| GB564106A (en) | Improvements in or relating to detachable bits for rock drills | |
| GB737471A (en) | Improvements relating to percussive drill bits |