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Publication of GB233740ApublicationCriticalpatent/GB233740A/en
233,740. Harvey, D. A., and Sansom, A. E. Nov. 20, 1923. Ventilators.-Accumulation of moisture on shop windows &c. is prevented by a current of air blown by an air compressor over the surface of the window, through a suitably arranged system of perforated pipes 2, 3. The air is drawn through a filter 4a in the basement or outside, at the same temperature as the outside air. Stop cocks &c. may be provided to cut out a part of the system. The tubes may have fittings to carry goods, streamers, &c., which fittings may be held by means of the perforations in the pipes. The temperature may be regulated by the regulation of the pressure.