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    • 8. 发明专利
    • Improvements in Apparatus for Building Hollow Concrete Structures.
    • GB190712520A
    • 1907-10-24
    • GB190712520D
    • 1907-05-30
    • MCCOY JOHN HUGH
    • MCCOY JOHN HUGH
    • 12,520. McCoy, J. H. May 30. Moulding structures in situ.-Relates to apparatus for building hollow concrete structures such as silos, cisterns, wells, &c. A frame 2, suspended at 4 from a crane &c., carries a working platform 3 and is provided with depending links 8 carrying concentric moulding frames 5, 6, the space between which is filled with concrete to form a wall. The moulds 5, 6 each consist of several members connected together by means of bolts 14, Fig. 4, passing through flanges 13, overlapping portions 15 being provided at each of the joints to prevent escape of the plastic material. In use, the apparatus is raised until the lower ends of the frames 5, 6 embrace the upper part of the wall, upon which they are clamped by tightening up the frame 6 and expanding the frame 5 by means of the bolts 14. Concrete is then run into the mould thus formed, and after it is set the frames are detached from the wall by expanding the frame 6 and contracting the frame 5, and the apparatus is raised for moulding a further portion of the wall. The frames 5, 6 are preferably lubricated by means of oil &c. before use, to prevent them from adhering to the moulded wall.