GB700947A - Improvements in the manufacture of precast prestressed concrete units - Google Patents
Improvements in the manufacture of precast prestressed concrete unitsInfo
- Publication number
- GB700947A GB700947A GB2034451A GB2034451A GB700947A GB 700947 A GB700947 A GB 700947A GB 2034451 A GB2034451 A GB 2034451A GB 2034451 A GB2034451 A GB 2034451A GB 700947 A GB700947 A GB 700947A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wires
- mould
- concrete
- yokes
- unison
- 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
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
- B28B23/022—Means for inserting reinforcing members into the mould or for supporting them in the mould
- B28B23/024—Supporting means
- B28B23/026—Mould partitionning elements acting as supporting means in moulds, e.g. for elongated articles
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)
- Rod-Shaped Construction Members (AREA)
Abstract
700,947. Reinforced concrete. LAING & SON, Ltd., J. Oct. 23, 1952 [Aug. 29, 1951], No. 20344/51. Class 20 (4) In a process for making prestressed concrete beams, the contamination with oil from the mould sides of the reinforcing wires is prevented by securing the wires between tensioning members located above and beyond the ends of the beam mould, partly tensioning the wires to prevent sagging and then lowering the tensioning members in unison to bring the wires to their correct positions within the mould. The apparatus consists of a mould box A containing a number of parallel channel-like moulds. Beyond each end of the mould box is positioned a pair of uprights F each having an arm G from which is suspended a yoke I by means of threaded rods H. The ends of reinforcing wires D are secured to the yokes and are partly tensioned by rams N which bear against uprights O so that the wires do not sag. Templates B, Fig. 4, are inserted into the mould to divide it into the required lengths and the yokes lowered in unison by rotation of the shafts H, the wires entering the mould and being guided by the vertical slots C in the templates. Plates K with transverse slots L are then placed against each template to secure the wires against vertical displacement and the wires brought to their final tension by the rams N. The moulds are then filled with concrete. After the concrete has hardened the wires D are cut, the sides of the mould are removed and the finished beams lifted out.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2034451A GB700947A (en) | 1951-08-29 | 1951-08-29 | Improvements in the manufacture of precast prestressed concrete units |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2034451A GB700947A (en) | 1951-08-29 | 1951-08-29 | Improvements in the manufacture of precast prestressed concrete units |
Publications (1)
Publication Number | Publication Date |
---|---|
GB700947A true GB700947A (en) | 1953-12-16 |
Family
ID=10144399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2034451A Expired GB700947A (en) | 1951-08-29 | 1951-08-29 | Improvements in the manufacture of precast prestressed concrete units |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB700947A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2931065A (en) * | 1956-12-28 | 1960-04-05 | Burroughs Corp | Apparatus for forming electrostatic printing heads |
US3070867A (en) * | 1959-12-21 | 1963-01-01 | Theodore J Belle | Strand holder and dam for prestressed concrete molds |
US3092886A (en) * | 1959-05-11 | 1963-06-11 | Fmc Corp | Apparatus for molding concrete t-beams |
US3200177A (en) * | 1963-04-04 | 1965-08-10 | Clarence Riegel | Method of forming concrete articles and slip forming machine therefor |
NL1004064C2 (en) * | 1996-09-18 | 1998-03-19 | Leenstra Machine En Staalbouw | Head-mould for driving pile production |
SG93922A1 (en) * | 2001-06-07 | 2003-01-21 | Housing & Dev Board | Improved pre-stressed concrete formation |
FR2906181A1 (en) * | 2006-09-25 | 2008-03-28 | Armand Francois Santonja | Reinforced concrete beam joint encasing formwork, has sheet metal plate with inverse U shape, and teeth that are formed of metal bars that are placed vertically in metal plate, where formwork has toothed comb or semi plate shape |
-
1951
- 1951-08-29 GB GB2034451A patent/GB700947A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2931065A (en) * | 1956-12-28 | 1960-04-05 | Burroughs Corp | Apparatus for forming electrostatic printing heads |
US3092886A (en) * | 1959-05-11 | 1963-06-11 | Fmc Corp | Apparatus for molding concrete t-beams |
US3070867A (en) * | 1959-12-21 | 1963-01-01 | Theodore J Belle | Strand holder and dam for prestressed concrete molds |
US3200177A (en) * | 1963-04-04 | 1965-08-10 | Clarence Riegel | Method of forming concrete articles and slip forming machine therefor |
NL1004064C2 (en) * | 1996-09-18 | 1998-03-19 | Leenstra Machine En Staalbouw | Head-mould for driving pile production |
SG93922A1 (en) * | 2001-06-07 | 2003-01-21 | Housing & Dev Board | Improved pre-stressed concrete formation |
FR2906181A1 (en) * | 2006-09-25 | 2008-03-28 | Armand Francois Santonja | Reinforced concrete beam joint encasing formwork, has sheet metal plate with inverse U shape, and teeth that are formed of metal bars that are placed vertically in metal plate, where formwork has toothed comb or semi plate shape |
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