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GB191320391A - Improvements in and relating to Screw Drivers. - Google Patents

Improvements in and relating to Screw Drivers.

Info

Publication number
GB191320391A
GB191320391A GB191320391DA GB191320391A GB 191320391 A GB191320391 A GB 191320391A GB 191320391D A GB191320391D A GB 191320391DA GB 191320391 A GB191320391 A GB 191320391A
Authority
GB
United Kingdom
Prior art keywords
relating
screw drivers
notches
screw
curdie
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
Inventor
Malcolm Curdie
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB191320391A publication Critical patent/GB191320391A/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
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/0023—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)

Abstract

20,391. Curdie, M. Sept. 9. Screwdrivers.-A cruciform screwdriver for use with a screw having crossed grooves is formed from a round shank 6 by cutting four notches in its end, these notches being so shaped as to leave intermediate strengthening-pieces 7.
GB191320391D 1913-09-09 1913-09-09 Improvements in and relating to Screw Drivers. Expired GB191320391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191320391T 1913-09-09

Publications (1)

Publication Number Publication Date
GB191320391A true GB191320391A (en) 1914-05-21

Family

ID=32646137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191320391D Expired GB191320391A (en) 1913-09-09 1913-09-09 Improvements in and relating to Screw Drivers.

Country Status (2)

Country Link
FR (1) FR462865A (en)
GB (1) GB191320391A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645394A (en) * 1983-09-09 1987-02-24 Ltv Aerospace And Defense Company Fastener apparatus

Also Published As

Publication number Publication date
FR462865A (en) 1914-02-07

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