GB178620A - An improved tool for boring undercut or reverse taper holes in timber and the like - Google Patents

An improved tool for boring undercut or reverse taper holes in timber and the like

Info

Publication number
GB178620A
GB178620A GB472621A GB472621A GB178620A GB 178620 A GB178620 A GB 178620A GB 472621 A GB472621 A GB 472621A GB 472621 A GB472621 A GB 472621A GB 178620 A GB178620 A GB 178620A
Authority
GB
United Kingdom
Prior art keywords
undercut
boring
cutters
reverse taper
timber
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
GB472621A
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
Priority to FR531470D priority Critical patent/FR531470A/fr
Application filed by Individual filed Critical Individual
Priority to GB472621A priority patent/GB178620A/en
Publication of GB178620A publication Critical patent/GB178620A/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

Abstract

178,620. Fletcher, H. P. Feb. 10, 1921. Drills and cutters.- A tool for boring undercut or taper holes in wood &c. comprises a tang-ended taper shank c slotted at h to receive the tongue f of a pivoted member e to which the cutter l is spigoted or screwed at m. The tongue f is pressed by a spring i against a control member comprising a ball race o and by feeding the tool downwards through the control member the cutter is moved outwardly to undercut the hole. In a modification, Fig. 2, two pivoted cutters are employed and the spring i is located between the tongues f, f<1>. The points of the cutters mav be oppositely disposed for cutting holes of reverse taper.
GB472621A 1921-02-10 1921-02-10 An improved tool for boring undercut or reverse taper holes in timber and the like Expired GB178620A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR531470D FR531470A (en) 1921-02-10
GB472621A GB178620A (en) 1921-02-10 1921-02-10 An improved tool for boring undercut or reverse taper holes in timber and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB472621A GB178620A (en) 1921-02-10 1921-02-10 An improved tool for boring undercut or reverse taper holes in timber and the like

Publications (1)

Publication Number Publication Date
GB178620A true GB178620A (en) 1922-04-27

Family

ID=9782613

Family Applications (1)

Application Number Title Priority Date Filing Date
GB472621A Expired GB178620A (en) 1921-02-10 1921-02-10 An improved tool for boring undercut or reverse taper holes in timber and the like

Country Status (2)

Country Link
FR (1) FR531470A (en)
GB (1) GB178620A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811187A (en) * 1954-12-10 1957-10-29 Loam Fay Dovetail countersinking tool for dowel connections
US3358722A (en) * 1966-07-05 1967-12-19 Russell L Berry Reverse taper boring tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811187A (en) * 1954-12-10 1957-10-29 Loam Fay Dovetail countersinking tool for dowel connections
US3358722A (en) * 1966-07-05 1967-12-19 Russell L Berry Reverse taper boring tool

Also Published As

Publication number Publication date
FR531470A (en) 1922-01-14

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