GB166299A - Improvements in collapsible cores for use in moulding concrete and like materials - Google Patents
Improvements in collapsible cores for use in moulding concrete and like materialsInfo
- Publication number
- GB166299A GB166299A GB426520A GB426520A GB166299A GB 166299 A GB166299 A GB 166299A GB 426520 A GB426520 A GB 426520A GB 426520 A GB426520 A GB 426520A GB 166299 A GB166299 A GB 166299A
- Authority
- GB
- United Kingdom
- Prior art keywords
- angle
- irons
- plates
- piece
- spindle
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
166,299. Bijvoet, W., and Delton, J. Feb. 11, 1920. Moulds.-A collapsable core for making holes in concrete or similar material comprises three or more angle-irons 1, Fig. 3, with their flanges bent to the requisite angle, and intermediate plates 2 pressed by springs into contact with two adjacent flanges. The angle-irons are mounted near one end on pivots 3 carried by a piece 5 supported on a central spindle 6 between fixed cbllars 8. The plates 2 are mounted on pivots 4 also carried by the piece 5. Near the other end of the core the angle-irons are connected by curved slotted arms 12, Fig. 4, with a nut 11 mounted on a screwed part of the spindle 6. The slots 16 on the arms engage pins 17 on a piece 10 mounted at the end of the spindle. The plates 2 have eyes 19 through which pass guide-bars 18 attached to the flanges of the angle-irons. The device is supported in position on wooden blocks, and is secured thereto by clamps mounted on the plates 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB426520A GB166299A (en) | 1920-02-11 | 1920-02-11 | Improvements in collapsible cores for use in moulding concrete and like materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB426520A GB166299A (en) | 1920-02-11 | 1920-02-11 | Improvements in collapsible cores for use in moulding concrete and like materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB166299A true GB166299A (en) | 1921-07-11 |
Family
ID=9773836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB426520A Expired GB166299A (en) | 1920-02-11 | 1920-02-11 | Improvements in collapsible cores for use in moulding concrete and like materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB166299A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3077646A (en) * | 1954-12-20 | 1963-02-19 | Degerfors Jarnverks Ab | Process for producing hot tops |
| US3201213A (en) * | 1955-12-01 | 1965-08-17 | Uddeholms Ab | Method of forming the upper end of killed steel ingot |
| US3476351A (en) * | 1967-07-03 | 1969-11-04 | Harold D Burdett | Expandable form for hollow-core concrete construction |
-
1920
- 1920-02-11 GB GB426520A patent/GB166299A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3077646A (en) * | 1954-12-20 | 1963-02-19 | Degerfors Jarnverks Ab | Process for producing hot tops |
| US3201213A (en) * | 1955-12-01 | 1965-08-17 | Uddeholms Ab | Method of forming the upper end of killed steel ingot |
| US3476351A (en) * | 1967-07-03 | 1969-11-04 | Harold D Burdett | Expandable form for hollow-core concrete construction |
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