GB731515A - Improvements in the manufacture of non-cylindrical hollow rounded pre-stressed concrete elements such as aircraft elements - Google Patents

Improvements in the manufacture of non-cylindrical hollow rounded pre-stressed concrete elements such as aircraft elements

Info

Publication number
GB731515A
GB731515A GB33984/53A GB3398453A GB731515A GB 731515 A GB731515 A GB 731515A GB 33984/53 A GB33984/53 A GB 33984/53A GB 3398453 A GB3398453 A GB 3398453A GB 731515 A GB731515 A GB 731515A
Authority
GB
United Kingdom
Prior art keywords
reinforcements
mould
core
pins
jacks
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
GB33984/53A
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
Publication of GB731515A publication Critical patent/GB731515A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
    • B28B21/60—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/12—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed to form prestressed circumferential reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C2001/0054—Fuselage structures substantially made from particular materials
    • B64C2001/0081—Fuselage structures substantially made from particular materials from metallic materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

731,515. Aircraft framework. BREGUET, L. Dec. 7, 1953 [Dec. 10, 1952], No. 33984/53. Class 4. [Also in Groups V and X] Hollow rounded articles, e.g. aircraft hull and fuselage parts, of pre-stressed concrete, have main and secondary systems of reinforcements, one system being transverse to the other, the arrangement being such that the tensioning of the main reinforcements produces lateral deflections of the secondary reinforcements which are thereby tensioned. As shown, the article is cast between an outer mould 5a, comprising two hinged half shells, and a core 5, the latter having projectible pins 6 with notched tips to receive the circular secondary reinforcements 3. The main reinforcements 2 cross the reinforcements 3 at points between the pins 6 and are anchored at one end in a ring 18 which becomes an integral part of the article. The other ends are attached to a flange 16 of a sliding cap 14 actuated by jacks 15. The core 5 has rings 11 through which the pins 6 slide, annular air bags 12 being housed between the rings 11 to bear against sectors 13. When the core 5 has received its reinforcements 2, 3, the reinforcements 2 are tensioned by the jacks 15, and this pulls the reinforcements 3 into the waved form shown in Fig. 4. The core is now inserted in the mould 5a which embraces the rings 17, 18, and the concrete is filled into the mould, e.g. through the top, the mould being vibrated by means attached at 14b to the cover 14. The air bags 12 are now inflated and the sectors 13 are pressed radially outwards. When the concrete has set, the mould 5a is opened and the article is removed. The pins 6 are connected by bell-cranks 31 to a vertically slidable central shaft 32 which is locked by a nut not shown, threaded thereon and bearing on an upper web of the core 5. When the reinforcements 2 are cut between the flange 16 and the ring 17, the jacks 15 are operated to pull the shaft 32 down to withdraw the pins 6. The mould and core may be resiliently suspended on springs 29. The two shells 21, 22 of the mould 5 are pivoted at 23, 24 and may be lined internally with contiguous bars 27, arranged somewhat like barrel staves, bearing on peripheral ribs 28.
GB33984/53A 1952-12-10 1953-12-07 Improvements in the manufacture of non-cylindrical hollow rounded pre-stressed concrete elements such as aircraft elements Expired GB731515A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2913798X 1952-12-10

Publications (1)

Publication Number Publication Date
GB731515A true GB731515A (en) 1955-06-08

Family

ID=34717510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33984/53A Expired GB731515A (en) 1952-12-10 1953-12-07 Improvements in the manufacture of non-cylindrical hollow rounded pre-stressed concrete elements such as aircraft elements

Country Status (3)

Country Link
US (1) US2913798A (en)
FR (1) FR1068271A (en)
GB (1) GB731515A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032298A (en) * 1959-10-29 1962-05-01 Francis P Callahan Airplane fuselage construction with helium lift

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3034537A (en) * 1958-05-20 1962-05-15 Lock Joint Pipe Co Prestressed concrete pipes
FR1222543A (en) * 1958-12-17 1960-06-10 Entpr S Campenon Bernard Pipes and hollow bodies in jacketed prestressed concrete and their production process
US3118808A (en) * 1961-07-06 1964-01-21 Marchioli Giorgio Apparatus for shaping and compressing on a mould sheets of plastic material, particularly asbestos cement
US3233027A (en) * 1961-12-20 1966-02-01 Wennstrom Elof Method of making prestressed concrete beams
US3180000A (en) * 1961-12-22 1965-04-27 Bossner Josef Formwork for manufacturing prestressed hollow concrete bodies
USB516558I5 (en) * 1965-12-27
US3604077A (en) * 1968-12-18 1971-09-14 Sea Ferro Inc Apparatus for making molded bodies
CN111619832B (en) * 2020-07-16 2021-09-28 北京强度环境研究所 Air bag type safety protection device of oil gas bearing system

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL71548C (en) *
FR955533A (en) * 1950-01-14
US1103270A (en) * 1911-06-07 1914-07-14 Frederick N Cronholm Mold for concrete pipe.
US1431565A (en) * 1917-10-02 1922-10-10 Charles F Buente Mold for making concrete articles
US1485142A (en) * 1922-04-28 1924-02-26 Lock Joint Pipe Co Process and apparatus for making centrifugal concrete pipes
US1499762A (en) * 1924-01-15 1924-07-01 Conradi Harry Centrifugal manufacture of reenforced-concrete pipes and the like
US1624191A (en) * 1925-07-22 1927-04-12 Frederick M Venzie Mold for cementitious conduits
DE468550C (en) * 1926-10-30 1928-11-15 E H Karl Bernhard Dr Ing Method of manufacturing conical reinforced concrete piles
US1843853A (en) * 1927-12-14 1932-02-02 Lux Mfg Company Insert for molds
US2001237A (en) * 1930-05-08 1935-05-14 Bille Leon Machine for the manufacture of pipes
US2048253A (en) * 1933-02-10 1936-07-21 Freyssinet Eugene Method and apparatus for the manufacture of hollow bodies of reenforced concrete
US2165671A (en) * 1936-11-02 1939-07-11 Vi Vac Concrete Pipe Company Apparatus for manufacturing plastic articles
US2196874A (en) * 1936-12-08 1940-04-09 Rudolf Otto Alfred Haccius Concrete molding apparatus
US2170188A (en) * 1937-10-30 1939-08-22 Walter H Cobi Collapsible core
US2353492A (en) * 1942-01-16 1944-07-11 John C O'connor Vibration producing mechanism
US2378584A (en) * 1943-05-05 1945-06-19 Schorer Corp Prestressing reinforcing device for concrete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032298A (en) * 1959-10-29 1962-05-01 Francis P Callahan Airplane fuselage construction with helium lift

Also Published As

Publication number Publication date
US2913798A (en) 1959-11-24
FR1068271A (en) 1954-06-23

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