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GB662912A - Improvements in or connected with a method of manufacturing pirns - Google Patents

Improvements in or connected with a method of manufacturing pirns

Info

Publication number
GB662912A
GB662912A GB2387249A GB2387249A GB662912A GB 662912 A GB662912 A GB 662912A GB 2387249 A GB2387249 A GB 2387249A GB 2387249 A GB2387249 A GB 2387249A GB 662912 A GB662912 A GB 662912A
Authority
GB
United Kingdom
Prior art keywords
pirns
reduced
tube
making
clearance
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
GB2387249A
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
Priority to GB2387249A priority Critical patent/GB662912A/en
Publication of GB662912A publication Critical patent/GB662912A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

662,912. Making pirns. SMITH, S. July 24, 1950 [Sept. 16, 1949], No. 23872/49. Class 83 (ii). [Also in Group IX] A method of making a metal pirn comprises forming a reduced end a<SP>2</SP> on a metal tube a and applying end pressure by a member b having a shoulder b<SP>1</SP> which abuts the reduced end a<SP>2</SP> and forces' it inwards to form a double thickness portion spaced from the main tube by a clearance a<SP>7</SP>, Fig. 5. The clearance allows the subsequent formation of grooves a<SP>6</SP> for the reception of spring loops. The remainder of the tube a<SP>5</SP> is then reduced to the required size by rotary swaging and the other end also formed with a double inturned-portion a<SP>9</SP>, Fig. 1.
GB2387249A 1949-09-16 1949-09-16 Improvements in or connected with a method of manufacturing pirns Expired GB662912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2387249A GB662912A (en) 1949-09-16 1949-09-16 Improvements in or connected with a method of manufacturing pirns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2387249A GB662912A (en) 1949-09-16 1949-09-16 Improvements in or connected with a method of manufacturing pirns

Publications (1)

Publication Number Publication Date
GB662912A true GB662912A (en) 1951-12-12

Family

ID=10202675

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2387249A Expired GB662912A (en) 1949-09-16 1949-09-16 Improvements in or connected with a method of manufacturing pirns

Country Status (1)

Country Link
GB (1) GB662912A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5598905A (en) * 1993-11-02 1997-02-04 Fichtel & Sachs Ag Method of making a shock absorber and a shock absorber made by the method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5598905A (en) * 1993-11-02 1997-02-04 Fichtel & Sachs Ag Method of making a shock absorber and a shock absorber made by the method

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