DE52742C - Screw with a special intermediate thread at the tip - Google Patents

Screw with a special intermediate thread at the tip

Info

Publication number
DE52742C
DE52742C DENDAT52742D DE52742DA DE52742C DE 52742 C DE52742 C DE 52742C DE NDAT52742 D DENDAT52742 D DE NDAT52742D DE 52742D A DE52742D A DE 52742DA DE 52742 C DE52742 C DE 52742C
Authority
DE
Germany
Prior art keywords
screw
tip
thread
intermediate thread
threads
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 - Lifetime
Application number
DENDAT52742D
Other languages
German (de)
Original Assignee
THE AMERICAN SCREW COMPANY in Providence, Rhode lsi., V. St. A
Publication of DE52742C publication Critical patent/DE52742C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0068—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw with multiple-threads, e.g. a double thread screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0073—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw characterised by its pitch, e.g. a varying pitch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/106—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a self-piercing screw-point, i.e. without removing material

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Printing Methods (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMTPATENT OFFICE

KLASSE -47: Maschinenelemente.CLASS -47: machine elements.

Bei den gewöhnlichen Holzschrauben ist die Steigung des Gewindes derart, dafs die Schraube bei jeder Drehung verhältnifsmäfsig nur um wenig vorrückt. Wenn zum schnelleren Ein-. dringen der Schraube die Steigung erhöht wird, ■ ohne dafs zugleich eine Aenderung der Gröfse oder Gestalt des Gewindeganges eintritt, so wird die Rinne zwischen den Gewindegängen vergröfsert. Durch Vermehrung der Steigung des Gewindes wird aber der Halt an dem Holz verringert, was namentlich am Spitzentheil der Schraube von Nachtheil ist, wo infolge des kleinen Durchmessers der Halt des Gewindes viel geringer als an dem cylindrischen Theil der Schraube ist. An der dargestellten Schraube ist hiergegen dadurch Vorkehrung getroffen, dafs ein Ergänzungs- oder Zwischengewinde zwischen denjenigen Gängen der Schraube angebracht wird, die als Ausläufer des Gewindes des Schraubenschäftes anzusehen sind.In ordinary wood screws the pitch of the thread is such that the screw advances relatively little with each turn. If for faster entry. if the screw penetrates the pitch is increased without at the same time changing the size or the shape of the thread turns, the groove between the threads is enlarged. By increasing the pitch of the thread, however, the hold on the wood is reduced, which is particularly true of the tip part of the Screw is disadvantageous where the thread is held by the small diameter much less than on the cylindrical part the screw is. This means that precautionary measures have been taken on the screw shown, that a supplementary or intermediate thread is attached between those threads of the screw which are to be regarded as an extension of the thread of the screw shaft.

Der Haüptgewindegang, welcher sich von dem cylindrischen Theil der Schraube bis zur Spitze derselben zieht, ist mit α bezeichnet. Das Ergänzungs- oder Zwischengewinde b liegt in dem Raum zwischen den Gewindegängen a an der Spitze der Schraube. Die Schraube kann geschnitten oder besser durch Walzen hergestellt werden.The main thread, which extends from the cylindrical part of the screw to the tip of the screw, is denoted by α. The supplementary or intermediate thread b is located in the space between the threads a at the tip of the screw. The screw can be cut or, better, made by rolling.

Claims (1)

Patent-Anspruch:Patent claim: An Holzschrauben mit einem oder mehreren Gewindegängen auf dem cylindrischen Schafttheil der Schraube die Einfügung eines oder mehrerer Zwischengewindegänge auf dem kegelförmigen Spitzentheil der Schraube zwischen den Gängen, die sich von dem Schraubenschaft bis zur Spitze ziehen, zum Zwecke, den Halt der Spitze im Holz zu vergröfsern. . .On wood screws with one or more threads on the cylindrical part of the shaft of the screw the insertion of one or more intermediate threads on the conical Tip part of the screw between the threads, which extend from the screw shaft to the tip, for the purpose of To enlarge the hold of the tip in the wood. . . Hierzu 1 Blatt Zeichnungen.1 sheet of drawings. BERLIN. GEDRUCKT IN DER REICHSDRUCKEREI.BERLIN. PRINTED IN THE REICH PRINTING COMPANY.
DENDAT52742D Screw with a special intermediate thread at the tip Expired - Lifetime DE52742C (en)

Publications (1)

Publication Number Publication Date
DE52742C true DE52742C (en)

Family

ID=327430

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT52742D Expired - Lifetime DE52742C (en) Screw with a special intermediate thread at the tip

Country Status (1)

Country Link
DE (1) DE52742C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054524B (en) * 1957-10-07 1959-04-09 Utina Elektrowerk Gmbh Bent electric fence insulator support for wooden posts
DE1085723B (en) * 1958-06-16 1960-07-21 Guenter & Co Oni Metall Wood screw
DE2732695A1 (en) * 1977-02-23 1978-08-24 Yamashina Seikosho Kk SELF-TAPPING FASTENER
EP0281203A1 (en) * 1987-03-06 1988-09-07 Kilton S.R.L. Improved screw
EP2012026A2 (en) 2007-05-18 2009-01-07 SWG Schraubenwerk Gaisbach GmbH Screw
EP2728209A1 (en) * 2012-11-05 2014-05-07 Harald Göttlich Thread moulding screw
EP3056747A1 (en) * 2015-02-16 2016-08-17 Kingi Oy Mounting screw

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054524B (en) * 1957-10-07 1959-04-09 Utina Elektrowerk Gmbh Bent electric fence insulator support for wooden posts
DE1085723B (en) * 1958-06-16 1960-07-21 Guenter & Co Oni Metall Wood screw
DE2732695A1 (en) * 1977-02-23 1978-08-24 Yamashina Seikosho Kk SELF-TAPPING FASTENER
EP0281203A1 (en) * 1987-03-06 1988-09-07 Kilton S.R.L. Improved screw
EP2012026A2 (en) 2007-05-18 2009-01-07 SWG Schraubenwerk Gaisbach GmbH Screw
EP2012026A3 (en) * 2007-05-18 2009-11-18 SWG Schraubenwerk Gaisbach GmbH Screw
US8480342B2 (en) 2007-05-18 2013-07-09 Wuerth International AG part interest Screw
EP2728209A1 (en) * 2012-11-05 2014-05-07 Harald Göttlich Thread moulding screw
EP3056747A1 (en) * 2015-02-16 2016-08-17 Kingi Oy Mounting screw
US10247220B2 (en) 2015-02-16 2019-04-02 Kingi Oy Mounting screw

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