GB1009582A - Improvements in or relating to prestressed concrete - Google Patents

Improvements in or relating to prestressed concrete

Info

Publication number
GB1009582A
GB1009582A GB33046/63A GB3304663A GB1009582A GB 1009582 A GB1009582 A GB 1009582A GB 33046/63 A GB33046/63 A GB 33046/63A GB 3304663 A GB3304663 A GB 3304663A GB 1009582 A GB1009582 A GB 1009582A
Authority
GB
United Kingdom
Prior art keywords
wire
concrete
fed
rollers
capstans
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
GB33046/63A
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.)
RICHARD LEES Ltd
Original Assignee
RICHARD LEES 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 RICHARD LEES Ltd filed Critical RICHARD LEES Ltd
Priority to GB33046/63A priority Critical patent/GB1009582A/en
Priority to US390088A priority patent/US3283385A/en
Publication of GB1009582A publication Critical patent/GB1009582A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B28B23/06—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 for the production of elongated articles
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

1,009,582. Wire strainers. RICHARD LEES Ltd., and R. R. OAKDEN. Aug. 17, 1964 [Aug. 21, 1963], No. 33046/63. Heading F2G. [Also in Division B5] A stress bed comprising a roller conveyer 5 and curing tunnel 8 receives green concrete from a moulding section 6 by means of a belt conveyer 7, and tensioned stressing wires 12 (one shown) surrounded by the concrete and held therein when it has hardened are continuously fed with the concrete from a reel 13 via a tensioning device 14. The wire is fed around grooved frusto-conical capstans 22 of the device 14, through a heated tunnel 15, where any tendency for the wire to creep under tension is accelerated, around a stressing pulley 16, maintained under constant load by an hydraulically or pneumatically operated piston and cylinder device 17, and finally into the concrete beam 9. Rubber-tyred rollers 19, Fig. 2, connected for rotation with the capstans and which functionally engage the beam 9, are continuously rotated thereby and may be additionally driven by a motor 30 to compensate if the wire is either over or underfed. The motor 30 is controlled by an electrical contact actuated by movement of the device 17. In a an alternative form of the tensioning device, the wire is fed by rollers 31 (Fig. 4, not shown) at a rate less than that at which the hardened concrete is fed from the curing tunnel 8 so that the wire is tensioned, and compensating action is produced by these rollers when similarly actuated by movement of device 17.
GB33046/63A 1963-08-21 1963-08-21 Improvements in or relating to prestressed concrete Expired GB1009582A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB33046/63A GB1009582A (en) 1963-08-21 1963-08-21 Improvements in or relating to prestressed concrete
US390088A US3283385A (en) 1963-08-21 1964-08-17 Apparatus for making prestressed concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33046/63A GB1009582A (en) 1963-08-21 1963-08-21 Improvements in or relating to prestressed concrete

Publications (1)

Publication Number Publication Date
GB1009582A true GB1009582A (en) 1965-11-10

Family

ID=10347808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33046/63A Expired GB1009582A (en) 1963-08-21 1963-08-21 Improvements in or relating to prestressed concrete

Country Status (2)

Country Link
US (1) US3283385A (en)
GB (1) GB1009582A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1330636A (en) * 1969-09-30 1973-09-19 Flowcrete Ltd Production of prestressed concrete
US3903222A (en) * 1974-04-11 1975-09-02 Jr Patrick F Brown Method for producing prestressed concrete
US4102957A (en) * 1975-11-20 1978-07-25 Canfarge Ltd (Francon Division) Apparatus and method for manufacturing prestressed concrete railway ties
FI75302C (en) * 1984-04-02 1988-06-09 Partek Ab Apparatus for continuous casting of a two-way biased end loose concrete product.
NL1007476C2 (en) * 1997-11-07 1999-05-10 Peter Cornelis Peters Method for manufacturing a reinforced elongated longitudinal load-bearing concrete product, and a pile.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1107235A (en) * 1910-01-06 1914-08-11 George Rae Process of manufacturing reinforced-concrete pressure-pipes.
GB673015A (en) * 1948-10-01 1952-05-28 Schroeder Werner Improvements in the manufacture of reinforced concrete elements
CH292714A (en) * 1951-08-30 1953-08-31 Robin Ros Mirko Process for the production of prestressed components and device for carrying out the process.
US2863206A (en) * 1952-08-27 1958-12-09 Kirchner Ignatz Adolf Apparatus for prestressing reinforcing wires for reinforced concrete parts in mass production
US2853250A (en) * 1953-06-16 1958-09-23 John Maurice Crom Apparatus for imparting stresses to structural members
US3055073A (en) * 1959-11-06 1962-09-25 Ben C Gerwick Inc Method and apparatus for the continuous production of prestressed concrete members

Also Published As

Publication number Publication date
US3283385A (en) 1966-11-08

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