GB681204A - Improvements in and relating to drilling tools - Google Patents

Improvements in and relating to drilling tools

Info

Publication number
GB681204A
GB681204A GB231850A GB231850A GB681204A GB 681204 A GB681204 A GB 681204A GB 231850 A GB231850 A GB 231850A GB 231850 A GB231850 A GB 231850A GB 681204 A GB681204 A GB 681204A
Authority
GB
United Kingdom
Prior art keywords
hearn
dyer
gibson
tool
relating
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
GB231850A
Inventor
Sydney Albert Powell
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.)
SIDNEY HARKHAM GIBSON
THOMAS JAMES DYER
WILLIAM HENRY HEARN
Original Assignee
SIDNEY HARKHAM GIBSON
THOMAS JAMES DYER
WILLIAM HENRY HEARN
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 SIDNEY HARKHAM GIBSON, THOMAS JAMES DYER, WILLIAM HENRY HEARN filed Critical SIDNEY HARKHAM GIBSON
Priority to GB231850A priority Critical patent/GB681204A/en
Publication of GB681204A publication Critical patent/GB681204A/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
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/24—Overall form of drilling tools
    • B23B2251/241—Cross sections of the diameter of the drill

Abstract

681,204. Drills. HEARN, W. H., GIBSON, S. H., and DYER, T. J., (trading as HEARN, GIBSON & DYER). Dec. 28, 1950 [Jan. 30, 1950], No. 2318/50. Class 83 (iii). A hand drilling-tool or auger comprises a shank having a cylindrical head section, the diameter of which exceeds that of any other part of the tool, and a main section B of uniform taper terminating in a point C of increased taper, the sections having a continuous standard, or like, twist. The cutting-edge may be backed-off as shown in Fig. 3. The drill has a contour corresponding to that of a wood-screw. The Provisional Specification states that the flutes may be straight.
GB231850A 1950-01-30 1950-01-30 Improvements in and relating to drilling tools Expired GB681204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB231850A GB681204A (en) 1950-01-30 1950-01-30 Improvements in and relating to drilling tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB231850A GB681204A (en) 1950-01-30 1950-01-30 Improvements in and relating to drilling tools

Publications (1)

Publication Number Publication Date
GB681204A true GB681204A (en) 1952-10-22

Family

ID=9737438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB231850A Expired GB681204A (en) 1950-01-30 1950-01-30 Improvements in and relating to drilling tools

Country Status (1)

Country Link
GB (1) GB681204A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444634A (en) * 2006-12-06 2008-06-11 Irwin Ind Tool Co Drill bit with three ribs
US8070398B2 (en) 2008-02-19 2011-12-06 Irwin Industrial Tool Company Multi-blade self feed bit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444634A (en) * 2006-12-06 2008-06-11 Irwin Ind Tool Co Drill bit with three ribs
GB2444634B (en) * 2006-12-06 2011-03-02 Irwin Ind Tool Co Drill bit
US8070398B2 (en) 2008-02-19 2011-12-06 Irwin Industrial Tool Company Multi-blade self feed bit

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