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Expired
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Henri Damman
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Individual
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Individual
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Publication of GB190429505ApublicationCriticalpatent/GB190429505A/en
29,505. Damman, H. Dec. 31. Floors.-Flooring boards 1 are secured together and to a bedding layer 3 of bitumen, cement, &c. by dovetail cross-pieces 2 which are split at the ends and expanded in diverging grooves 6 in the outer boards by wedges 11. The boards are also fixed to the bedding by prongs 16 of metal strips 13 inserted in dovetail grooves 15 in the boards and by keys of the bedding-material entering the grooves, or metal braces 17, passing through the cross-keys 2, may be inserted in the bedding- material.
GB190429505D1904-12-311904-12-31An Improved Construction of Flooring.
ExpiredGB190429505A
(en)