GB530280A - Improvements in and relating to screws - Google Patents

Improvements in and relating to screws

Info

Publication number
GB530280A
GB530280A GB1800639A GB1800639A GB530280A GB 530280 A GB530280 A GB 530280A GB 1800639 A GB1800639 A GB 1800639A GB 1800639 A GB1800639 A GB 1800639A GB 530280 A GB530280 A GB 530280A
Authority
GB
United Kingdom
Prior art keywords
screw
thread
work
screws
steele
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
GB1800639A
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.)
VICTOR WILLIAM STEELE
Original Assignee
VICTOR WILLIAM STEELE
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 VICTOR WILLIAM STEELE filed Critical VICTOR WILLIAM STEELE
Priority to GB1800639A priority Critical patent/GB530280A/en
Publication of GB530280A publication Critical patent/GB530280A/en
Expired 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
    • F16B25/001—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
    • F16B25/0021—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 metal, e.g. sheet-metal or aluminium
    • 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
    • F16B25/0047—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 ridge being characterised by its cross-section in the plane of the shaft axis

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Abstract

530,280. Self-tapping screws. STEELE. V. W., and STEELE, W. H. June 20, 1939, No. 18006. [Class 83 (iii)] A self-tapping screw has the shank composed of a leading part 4 of diameter slightly less than that of the hole into which it is to be inserted and a following portion 5 of smaller diameter than the portion 4. The two portions may merge into each other at 6, 7 or may be separated by a step. The thread 8, which may be single or multiple, increases uniformly or otherwise from the start 10 to a point 9, after which it remains parallel. The screw may have a plain portion between the threaded part and the head, this plain portion being adapted to engage an enlarged hole in the work and having a diameter equal to or greater than the tops of the thread 8. The forward end of the screw may extend beyond the end 10 of the thread and may be tapered as at 11 or pointed. The screws may be screwed directly into the work or may co-operate with unthreaded nuts and may be partly or wholly hardened. According to the Provisional Specification the portions 4, 5 may be united by an inclined shoulder which will have the effect of removing the thread formed in the work when the screw is reversely rotated, thereby allowing removal of the screw.
GB1800639A 1939-06-20 1939-06-20 Improvements in and relating to screws Expired GB530280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1800639A GB530280A (en) 1939-06-20 1939-06-20 Improvements in and relating to screws

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1800639A GB530280A (en) 1939-06-20 1939-06-20 Improvements in and relating to screws

Publications (1)

Publication Number Publication Date
GB530280A true GB530280A (en) 1940-12-09

Family

ID=10105002

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1800639A Expired GB530280A (en) 1939-06-20 1939-06-20 Improvements in and relating to screws

Country Status (1)

Country Link
GB (1) GB530280A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172170A (en) * 1961-09-18 1965-03-09 D B Frampton & Company Composite wood panel
EP0207862A1 (en) * 1985-07-05 1987-01-07 LAURENT INDUSTRIE S.A. Société dite: Threaded bar like a screw and process for making the same
DE19611678A1 (en) * 1995-04-06 1996-10-10 Otto Ziel Schraubenfabrik Gmbh Screw for chipboard panels, with single or multi-hand thread

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172170A (en) * 1961-09-18 1965-03-09 D B Frampton & Company Composite wood panel
EP0207862A1 (en) * 1985-07-05 1987-01-07 LAURENT INDUSTRIE S.A. Société dite: Threaded bar like a screw and process for making the same
FR2584464A1 (en) * 1985-07-05 1987-01-09 Laurent Sa THREADED ROD, SUCH AS A SCREW, AND METHOD FOR MANUFACTURING THE SAME
DE19611678A1 (en) * 1995-04-06 1996-10-10 Otto Ziel Schraubenfabrik Gmbh Screw for chipboard panels, with single or multi-hand thread

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