GB228740A - Improvements relating to the making of conduits and to cores for the same - Google Patents

Improvements relating to the making of conduits and to cores for the same

Info

Publication number
GB228740A
GB228740A GB815224A GB815224A GB228740A GB 228740 A GB228740 A GB 228740A GB 815224 A GB815224 A GB 815224A GB 815224 A GB815224 A GB 815224A GB 228740 A GB228740 A GB 228740A
Authority
GB
United Kingdom
Prior art keywords
core
rubber
blocks
ducts
moulding
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
GB815224A
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
Priority to GB815224A priority Critical patent/GB228740A/en
Publication of GB228740A publication Critical patent/GB228740A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
    • E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
    • E04G15/063—Re-usable forms
    • 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
    • B28B7/306—Cores; Mandrels adjustable, collapsible, or expanding pliable or extensible
    • 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
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/348—Moulds, cores, or mandrels of special material, e.g. destructible materials of plastic material or rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
    • F16L1/038—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being made in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material

Abstract

228,740. Murray, T. E. March 31, 1924. Moulding in situ.- A rubber core for moulding concrete &c. conduits consists of para rubber to the extent of forty per cent or more, so as to be sufficiently elastic to be detached readily from the surrounding concrete surface and also to regain its normal shape after contraction due to withdrawal from the concrete; when a tubular core is used, the thickness of the material is at least one-eighth of the diameter of the core. The conduits are moulded in sections, the rubber core 2 being pulled to cause it to contract and become detached from the concrete surface 1 and then being placed in position for moulding a further section. The core is formed with a smooth outer surface and may be adapted to form a series of ducts 6, Fig. 3, and also ducts in floors and walls. Means to facilitate withdrawal of the core may be provided in the form of blocks 26, Fig. 7, spaced apart and connected together by a chain 27 which is also attached to a thick rubber tube 28, seured at the end of each of a number of rubber cores arranged in line. The size of the blocks is such as to hold the core distended in use and also to allow the necessary contraction. The blocks 26 also provide means for gripping the core, as by a clamp so as to facilitate withdrawal of the tube, the free end of which may be taken up on a reel. For ducts of oblong cross-section the core and the blocks mav be made of corresponding shape, as shown in Fig. 8. Specification 151,692 is referred to.
GB815224A 1924-03-31 1924-03-31 Improvements relating to the making of conduits and to cores for the same Expired GB228740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB815224A GB228740A (en) 1924-03-31 1924-03-31 Improvements relating to the making of conduits and to cores for the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB815224A GB228740A (en) 1924-03-31 1924-03-31 Improvements relating to the making of conduits and to cores for the same

Publications (1)

Publication Number Publication Date
GB228740A true GB228740A (en) 1925-02-12

Family

ID=9846740

Family Applications (1)

Application Number Title Priority Date Filing Date
GB815224A Expired GB228740A (en) 1924-03-31 1924-03-31 Improvements relating to the making of conduits and to cores for the same

Country Status (1)

Country Link
GB (1) GB228740A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623261A (en) * 1943-11-22 1952-12-30 Semeraro Ariosto Core for molding channels and outlet openings in concrete walls
US2702199A (en) * 1951-06-16 1955-02-15 James W Mcdonnell Flexible and expansible threaded joint
US3037326A (en) * 1957-12-23 1962-06-05 John W Holloway Method and apparatus for providing conduits in molded concrete slabs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623261A (en) * 1943-11-22 1952-12-30 Semeraro Ariosto Core for molding channels and outlet openings in concrete walls
US2702199A (en) * 1951-06-16 1955-02-15 James W Mcdonnell Flexible and expansible threaded joint
US3037326A (en) * 1957-12-23 1962-06-05 John W Holloway Method and apparatus for providing conduits in molded concrete slabs

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