FR648426A - Forets perfectionnés et leur fabrication - Google Patents

Forets perfectionnés et leur fabrication

Info

Publication number
FR648426A
FR648426A FR648426DA FR648426A FR 648426 A FR648426 A FR 648426A FR 648426D A FR648426D A FR 648426DA FR 648426 A FR648426 A FR 648426A
Authority
FR
France
Prior art keywords
manufacture
drills
advanced
advanced drills
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
Other languages
English (en)
Inventor
John Joseph Rawlings
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.)
Rawlplug Co Ltd
Original Assignee
Rawlplug Co 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 Rawlplug Co Ltd filed Critical Rawlplug Co Ltd
Application granted granted Critical
Publication of FR648426A publication Critical patent/FR648426A/fr
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/46—Drills having a centre free from cutting edges or with recessed cutting edges

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
FR648426D 1927-03-03 1928-02-04 Forets perfectionnés et leur fabrication Expired FR648426A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB598727A GB280416A (en) 1927-03-03 1927-03-03 An improved twist drill, and method of manufacturing the same

Publications (1)

Publication Number Publication Date
FR648426A true FR648426A (fr) 1928-12-10

Family

ID=9806328

Family Applications (1)

Application Number Title Priority Date Filing Date
FR648426D Expired FR648426A (fr) 1927-03-03 1928-02-04 Forets perfectionnés et leur fabrication

Country Status (2)

Country Link
FR (1) FR648426A (fr)
GB (1) GB280416A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK177090B1 (en) * 2009-12-03 2011-07-18 Bauer Drill I S A rotary drill

Also Published As

Publication number Publication date
GB280416A (en) 1927-11-17

Similar Documents

Publication Publication Date Title
FR648426A (fr) Forets perfectionnés et leur fabrication
FR647872A (fr) Stylographe perfectionné
FR34043E (fr) électrode actinogène
FR649390A (fr) Perfectionnements apportés aux articles en quartz et à leur fabrication
FI11680A (fi) Högtrycksångkraftanläggning med hjälpanvändning av vanlig ångpanna
FI11719A (fi) Arvontavälineet
FR635588A (fr) Stéoroscope perfectionné
FR649795A (fr) Aéromoteur perfectionné
FR632162A (fr) Pyromètre
FR615605A (fr) Perfectionnements aux charnières et à leur fabrication
FI11440A (fi) Magasinslipapparat med mekaniskt drivna matningsanordningar
FI11521A (fi) Ljuddämpare med vattenspolning
FI11459A (fi) Värmeackumulator med ångalstrare
FI11435A (fi) Med slutet övertryckskretslopp arbetande förbränningsmotor
FR653681A (fr) Différentiel
FR636935A (fr) Four tunnel
FI11525A (fi) Reklam-inläggningsblad
FI11578A (fi) Glasskärningsdiamant
FI11465A (fi) Isolatoranordning
FI11659A (fi) Elektrisk glassmältugn
FI11662A (fi) Luftväxlingsventil
FI11513A (fi) Byxsträckare
FI11514A (fi) Ramsågskonstruktion
FI11657A (fi) Vippbar kvicksilver-stegkopplare
FI11533A (fi) Tvättapparat