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Expired
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James Challis
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Individual
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Individual
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Publication of GB190425706ApublicationCriticalpatent/GB190425706A/en
Chemical And Physical Treatments For Wood And The Like
(AREA)
Abstract
25,706. Challis, J. Nov. 25. Slates and blackboards.-A frame B of wood battens, strengthened if necessary by cross-battens C, is coated or impregnated with tar, creosote, or the like, to protect it from moisture, and is covered on both sides with thin three-ply boards D, which may be secured in any suitable way, such as by nails or screws E, or by a suitable cement. The whole is enclosed in a suitable framing A. The boards D are treated on their inner surfaces with creosote, waterproof paint, or other convenient coating, and on their outer surfaces with waterproof paint or other suitable coating. When the board is to be used on both sides, the framing A may be a double moulding, as shown in Fig. 2.
GB190425706D1904-11-251904-11-25Improvements in Boards for Railway Station Notices and other purposes.
ExpiredGB190425706A
(en)
Improvements in Composition for Coating or Impregnating Pasteboard and the like for Roofing and other purposes, also applicable for Coating the Walls of Buildings and for other purposes