GB105408A - An Improved Bit for Cutting Circular Undercut Holes and Holes of various Diameters. - Google Patents

An Improved Bit for Cutting Circular Undercut Holes and Holes of various Diameters.

Info

Publication number
GB105408A
GB105408A GB547016A GB547016A GB105408A GB 105408 A GB105408 A GB 105408A GB 547016 A GB547016 A GB 547016A GB 547016 A GB547016 A GB 547016A GB 105408 A GB105408 A GB 105408A
Authority
GB
United Kingdom
Prior art keywords
holes
shank
members
various diameters
bit
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
GB547016A
Inventor
David Jeffrey Lauder
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB547016A priority Critical patent/GB105408A/en
Publication of GB105408A publication Critical patent/GB105408A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0018—Drills for enlarging a hole
    • B23B51/0045—Drills for enlarging a hole by expanding or tilting the toolhead

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)

Abstract

105,408. Lauder, D. J. Oct. 12, 1916. Augers.-A bit for producing undercut holes, particularly in wood, has a pair of members 6, Fig 1, pivoted in a slot in the shank at 5. The expansion is effected by a sleeve bearing on the work and having a rounded edge 11, slots 12 to receive the members 6, and openings 15 for the escape of cuttings. The shank has a screw point 3 and cutting-edges 3a and may be graduated to show, in conjunction with the sleeve, the depth drilled. In a modification, not for undercutting, the members are linked at 18, Fig. 4, to a sleeve 13 adjustable on the shank and clamped by screws 19 engaging slots in the shank, which is graduated to show the effective diameter of the bit.
GB547016A 1916-10-12 1916-10-12 An Improved Bit for Cutting Circular Undercut Holes and Holes of various Diameters. Expired GB105408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB547016A GB105408A (en) 1916-10-12 1916-10-12 An Improved Bit for Cutting Circular Undercut Holes and Holes of various Diameters.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB547016A GB105408A (en) 1916-10-12 1916-10-12 An Improved Bit for Cutting Circular Undercut Holes and Holes of various Diameters.

Publications (1)

Publication Number Publication Date
GB105408A true GB105408A (en) 1917-04-19

Family

ID=32481814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB547016A Expired GB105408A (en) 1916-10-12 1916-10-12 An Improved Bit for Cutting Circular Undercut Holes and Holes of various Diameters.

Country Status (1)

Country Link
GB (1) GB105408A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792728A (en) * 1955-05-13 1957-05-21 Cleveland Twist Drill Co Counter-cutting tool
US2818753A (en) * 1956-08-20 1958-01-07 Guy O Leggett Reverse taper boring tool
EP0241240A2 (en) * 1986-04-07 1987-10-14 E. Marlowe Goble Suture anchor apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792728A (en) * 1955-05-13 1957-05-21 Cleveland Twist Drill Co Counter-cutting tool
US2818753A (en) * 1956-08-20 1958-01-07 Guy O Leggett Reverse taper boring tool
EP0241240A2 (en) * 1986-04-07 1987-10-14 E. Marlowe Goble Suture anchor apparatus
EP0241240A3 (en) * 1986-04-07 1989-09-13 E. Marlowe Goble Suture anchor apparatus

Similar Documents

Publication Publication Date Title
US2573462A (en) Tubular rotary cutter
US1515548A (en) Apparatus for reboring holes on drilling machines and turning lathes
ATE127051T1 (en) THREAD MILLING CUTTER.
GB556145A (en) Improvements in or relating to grub screws adapted to be rotated by some form of key
GB105408A (en) An Improved Bit for Cutting Circular Undercut Holes and Holes of various Diameters.
US2340941A (en) Burring attachment for drills
US2442554A (en) Countersink and center reamer
GB244333A (en) An improved expansible boring tool
US835125A (en) Auger-bit.
FR2235748A1 (en) Drive for a conical sheet metal drill - has a stop for ensuring correct diameter of the drilled hole
GB215051A (en) Improved operative tool for well-boring
GB191117756A (en) Improvements in or relating to Drills and Taps for Multiple Diameter Holes.
GB431711A (en) Improvements relating to drilling, boring and like tools
GB835083A (en) Improvements relating to methods of forming holes having curved axes
GB570098A (en) Improvements in centre and like drills
FR2382965A1 (en) Drill bit for marking hole centre for boring bit - has two radial cutting edges with perpendicular trailing edges lagging radii
GB840701A (en) Improvements in or relating to drill bits
GB543632A (en) An improved tool for facing and counterboring
GB190625179A (en) A Combined Drill and Reamer.
GB200173A (en) Improvements in and relating to expansion counter-boring bits
GB178620A (en) An improved tool for boring undercut or reverse taper holes in timber and the like
FR2303650A1 (en) FLOWER FOR DRILLING HOLES
GB191413953A (en) Improvements in and relating to Expansible Bits.
US1705647A (en) Boring bit
GB190424907A (en) Improvements in Boring Tools, Reamers and the like.