GB416270A - Improvements in or relating to percussive tools - Google Patents

Improvements in or relating to percussive tools

Info

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
Application number
GB651934A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Holman Brothers Ltd
Original Assignee
Holman Brothers Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Holman Brothers Ltd filed Critical Holman Brothers Ltd
Priority to GB651934A priority Critical patent/GB416270A/en
Publication of GB416270A publication Critical patent/GB416270A/en
Expired legal-status Critical Current

Links

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.
GB651934A 1934-02-28 1934-02-28 Improvements in or relating to percussive tools Expired GB416270A (en)

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)

Similar Documents

Publication Publication Date Title
GB416270A (en) Improvements in or relating to percussive tools
GB969879A (en) Release rotation mechanism for rock drills
GB356989A (en) Improvements in feeding devices for percussive tools
GB369961A (en) Improvements in feeding device for percussive tools
GB376575A (en) Improvements in feeding devices for percussive tools
GB358790A (en) Improvements in feeding devices for percussive tools
DE598515C (en) Dog collar
GB355587A (en) Improvements in feeding devices for percussive tools
DE667083C (en) Automatic feed device for rock drills
DE881485C (en) Step drill
GB420266A (en) Improvements in or relating to percussive tools
DE364166C (en) Frame for scraping and winning with a pick hammer
GB377676A (en) Improvements in or relating to variable stroke percussive drilling and the like machines or devices
DE380632C (en) Automatic feed for hammer drills by means of a rack and spring-loaded latch
DE529686C (en) Call waiting machine
GB277505A (en) Improvements relating to cutting, drawing and like presses for operating on metal or other sheets or strips
GB330046A (en) Improvement in rock drills
DE582759C (en) By air pressure or electrically driven hammer saw for making wall slots or for cutting off blocks of wall, concrete or stone
GB551374A (en) Improvements in and relating to multiple drilling and like machines
GB138906A (en) An improved hand drilling tool
GB356543A (en) Improvements in feeding device for rock drills
GB363793A (en) Improvements in feeding devices for percussive tools
GB356009A (en)
GB379698A (en) Improvements in and relating to fluid operated tools
GB136443A (en) Holding-up Machine for Pneumatic Rivetting.