GB435304A - Improvements in the manufacture of self-tapping screws - Google Patents

Improvements in the manufacture of self-tapping screws

Info

Publication number
GB435304A
GB435304A GB12367/35A GB1236735A GB435304A GB 435304 A GB435304 A GB 435304A GB 12367/35 A GB12367/35 A GB 12367/35A GB 1236735 A GB1236735 A GB 1236735A GB 435304 A GB435304 A GB 435304A
Authority
GB
United Kingdom
Prior art keywords
grooves
self
screw
manufacture
april
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
GB12367/35A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB435304A publication Critical patent/GB435304A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/027—Rolling of self-tapping screws

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Transmission Devices (AREA)

Abstract

435,304. Rolling screw - threads. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. April 24, 1935, No. 12367. Convention date, April 24, 1934. [Class 83 (iv)] A self-tapping screw 18 with longitudinal grooves 22 is formed by rolling a blank between a stationary die 15 with angular screw-thread forming grooves 21, and a co-operating reciprocating die 11, with corresponding angular grooves 20 and an insert 23 having transverse grooves 24 for forming the longitudinal grooves in the work.
GB12367/35A 1934-04-24 1935-04-24 Improvements in the manufacture of self-tapping screws Expired GB435304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US435304XA 1934-04-24 1934-04-24

Publications (1)

Publication Number Publication Date
GB435304A true GB435304A (en) 1935-09-18

Family

ID=21927629

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12367/35A Expired GB435304A (en) 1934-04-24 1935-04-24 Improvements in the manufacture of self-tapping screws

Country Status (1)

Country Link
GB (1) GB435304A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760388A (en) * 1953-05-18 1956-08-28 Bethlehem Steel Corp Two-diameter thread rolling device
EP0615800A1 (en) * 1993-03-17 1994-09-21 Former Screw with ogive point and process for its production
EP1350967A2 (en) * 2002-03-27 2003-10-08 Aoyama Seisakusho Co., Ltd. Male screw part

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760388A (en) * 1953-05-18 1956-08-28 Bethlehem Steel Corp Two-diameter thread rolling device
EP0615800A1 (en) * 1993-03-17 1994-09-21 Former Screw with ogive point and process for its production
EP1350967A2 (en) * 2002-03-27 2003-10-08 Aoyama Seisakusho Co., Ltd. Male screw part
EP1350967A3 (en) * 2002-03-27 2003-12-17 Aoyama Seisakusho Co., Ltd. Male screw part

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