DE52390C - Center drill - Google Patents

Center drill

Info

Publication number
DE52390C
DE52390C DENDAT52390D DE52390DA DE52390C DE 52390 C DE52390 C DE 52390C DE NDAT52390 D DENDAT52390 D DE NDAT52390D DE 52390D A DE52390D A DE 52390DA DE 52390 C DE52390 C DE 52390C
Authority
DE
Germany
Prior art keywords
center drill
knife
cutting head
precutter
delimits
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.)
Active
Application number
DENDAT52390D
Other languages
German (de)
Original Assignee
C. HALLEN" SCHEID in Ronsdorf-Langenhaus, RheinpreufserJ
Publication of DE52390C publication Critical patent/DE52390C/en
Active legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G15/00—Boring or turning tools; Augers

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Drilling Tools (AREA)
  • Printing Methods (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

KLASSE 38: Holz-Bearbeitung, Geräthe und MaschinenCLASS 38: Wood processing, tools and machines

CARL HALLENSCHEID in RONSDORF-LANGENHAUS (Rheinpreussen).CARL HALLENSCHEID in RONSDORF-LANGENHAUS (Rheinpreussen).

C e η t r um bohrer.C e η t r um Bohrer.

Fatentirt im Deutschen Reiche vom 8. Januar 1890 ab.Fatentirt in the German Empire from January 8, 1890.

Am Schneidkopf werden der sogenannte Zirkel <z, das Messer b und der Vorschneider c so gestellt, dafs ihre Spitzen ein gleichschenkliges Dreieck bilden, an dessen den kleinsten Dreieckswinkel begrenzender Spitze sich der Zirkel a befindet. Die Schneide des Messers b ist, von der Dreiecksfläche betrachtet, nach aufsen gerichtet, so dafs ihr bei Anwendung des Bohrers der Vorschneider c folgt. Kolben, Halm und Schneidkopf körper können quadratisch, rechteckig oder cylindrisch gestaltet sein.At the cutting head the so-called compasses <z, the knife b and the precutter c are placed in such a way that their tips form an isosceles triangle, at the tip of which the compass a is located, which delimits the smallest triangle angle. The cutting edge of the knife b , viewed from the triangular surface, is directed outwards, so that when the drill is used, the rough cutter c follows it. Piston, straw and cutting head body can be designed square, rectangular or cylindrical.

Claims (1)

Patent-Anspruch:Patent claim: Ein Centrumbohrer, dessen Schneidkopf dadurch eine Bohrung, deren Durchmesser seiner doppelten Breite gleichkommt, herstellt, dafs der Zirkel a, der Vorschneider c und das Messer b so gestellt sind, dafs ihre Spitzen ein gleichschenkliges Dreieck bilden, an dessen den kleinsten Winkel begrenzender Spitze der Zirkel a sich befindet.A center drill, the cutting head of which produces a hole with a diameter equal to its double width, that the compass a, the precutter c and the knife b are positioned so that their tips form an isosceles triangle, at the tip of which the smallest angle delimits the Circle a is located. Hierzu ι Blatt Zeichnungen.For this purpose ι sheet of drawings. BERLIN. GEDRUCKT IN DER REICHSDRUCKEREI.BERLIN. PRINTED IN THE REICH PRINTING COMPANY.
DENDAT52390D Center drill Active DE52390C (en)

Publications (1)

Publication Number Publication Date
DE52390C true DE52390C (en)

Family

ID=327110

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT52390D Active DE52390C (en) Center drill

Country Status (1)

Country Link
DE (1) DE52390C (en)

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