GB647412A - Improvements in or relating to collapsible cores for casting concrete or the like - Google Patents
Improvements in or relating to collapsible cores for casting concrete or the likeInfo
- Publication number
- GB647412A GB647412A GB196548A GB196548A GB647412A GB 647412 A GB647412 A GB 647412A GB 196548 A GB196548 A GB 196548A GB 196548 A GB196548 A GB 196548A GB 647412 A GB647412 A GB 647412A
- Authority
- GB
- United Kingdom
- Prior art keywords
- members
- plates
- frame
- core
- cores
- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
Abstract
647,412. Casting in situ. KING, V. R. Jan. 22, 1948, No. 1965. [Class 20(ii) A collapsable core for use in forming concrete cavity walls, sewers or chimney stacks comprises a hollow shell having flexible arcuate members X and flat plates MP each connected together by a slotted tubular member TS which engages over flanges FH. The members TS have holes to receive a frame SF. To collapse the core, the members TS on one side of the core are raised while those on the other side are held fixed, the frame SF thus pivots out of a horizontal plane and draws the members TS together as shown in the upper part of the Figure. Tie members are shaped to engage between the cores. Cores may be used side by side and end to end. Members RL help to support the inward pressure of the concrete. In a modification, the transverse rods of the frame SF may be replaced by plates which have holes to receive the longitudinal rods. The edges of the plates abut against the plates MP. Specification 642,404 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB196548A GB647412A (en) | 1948-01-22 | 1948-01-22 | Improvements in or relating to collapsible cores for casting concrete or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB196548A GB647412A (en) | 1948-01-22 | 1948-01-22 | Improvements in or relating to collapsible cores for casting concrete or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB647412A true GB647412A (en) | 1950-12-13 |
Family
ID=9731167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB196548A Expired GB647412A (en) | 1948-01-22 | 1948-01-22 | Improvements in or relating to collapsible cores for casting concrete or the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB647412A (en) |
-
1948
- 1948-01-22 GB GB196548A patent/GB647412A/en not_active Expired
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