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Expired
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Charles Ingham Haden
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Specific Sealing Or Ventilating Devices For Doors And Windows
(AREA)
Ventilation
(AREA)
Abstract
26,854. Haden, C. I. Dec. 10. Building - blocks for ventilation.- The application of hollow ventilating- shaft blocks having means for keying with each other and with the rest of the wall to the Tobin system of ventilation is shown in Fig. 18. [Reference has been directed under Section 7 of Patents &c. Act, 1907, to Specifications No. 13,741, A.D. 1885, and No. 4091, A.D. 1897, [Abridgment Class Moulding &c.].]
GB190826854D1908-12-101908-12-10Improved Blocks for the Construction of Flues, Ventilating Shafts and the like.
ExpiredGB190826854A
(en)