GB416270A - Improvements in or relating to percussive tools - Google Patents
Improvements in or relating to percussive toolsInfo
- Publication number
- GB416270A GB416270A GB651934A GB651934A GB416270A GB 416270 A GB416270 A GB 416270A GB 651934 A GB651934 A GB 651934A GB 651934 A GB651934 A GB 651934A GB 416270 A GB416270 A GB 416270A
- Authority
- GB
- United Kingdom
- Prior art keywords
- teeth
- pawl
- pawls
- raised
- uppermost
- 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
- 241001570521 Lonicera periclymenum Species 0.000 abstract 1
- 235000009388 Parthenocissus quinquefolia Nutrition 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
- E21B44/08—Automatic control of the tool feed in response to the amplitude of the movement of the percussion tool, e.g. jump or recoil
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
416,270. Percussive drills. COCK, B., Woodbine, Camborne, and HOLMAN BROS., Ltd., Camborne, Cornwall. Feb. 28, 1934, No. 6519. [Class 124.] In a percussive drill in which the tool is fed by the idle blows, the moving element carries two pawls 30,31. These engage teeth 42, 43, 44 on a bar 41. For forward feed the bar 41 is rotated to bring the teeth 42 uppermost, the rods 52 being twisted by arms engaging the cams 45, 46 so that the pawl 31 is raised by the plunger 37. For withdrawal the rod 41 is revolved to bring teeth 43 uppermost, pawl 30 is raised and pawl 31 lowered to contact with the teeth. To lock the carriage against motion either direction the teeth 44 are brought uppermost and are then engaged by both pawls. In a modification one set of teeth are provided on a flat plate, forward feed being obtained by a set of pawls and withdrawal by one pawl when the former are raised.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB651934A GB416270A (en) | 1934-02-28 | 1934-02-28 | Improvements in or relating to percussive tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB651934A GB416270A (en) | 1934-02-28 | 1934-02-28 | Improvements in or relating to percussive tools |
Publications (1)
Publication Number | Publication Date |
---|---|
GB416270A true GB416270A (en) | 1934-09-13 |
Family
ID=9815985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB651934A Expired GB416270A (en) | 1934-02-28 | 1934-02-28 | Improvements in or relating to percussive tools |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB416270A (en) |
-
1934
- 1934-02-28 GB GB651934A patent/GB416270A/en not_active Expired
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